16,323 results on '"Cementoenamel junction"'
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2. Morphological analysis of cementoenamel junction in premolars of Sri Lankans
- Author
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Arambawatta, Kapila, Abeysundara, Anushka, Ihalagedera, Dhammika, Nawarathna, Gayani, Nandasena, Tharanga, Peiris, Roshan, Banneheka, Shyama, and Nanayakkara, Deepthi
- Published
- 2021
- Full Text
- View/download PDF
3. A Reappraisal of the Accuracy of the Tactile Method for the Detection of the Subgingival Cementoenamel Junction: An In Vivo Study.
- Author
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Mokhagul J, Lertpimonchai A, Samaranayake L, and Charatkulangkun O
- Abstract
Objectives: This article reappraises the accuracy and factors associated with the detection of the cementoenamel junction (CEJ) using the tactile method., Materials and Methods: A total of 111 tooth sites of 7 patients scheduled for flap surgery were selected for the study. The CEJ was detected in a blind manner using the conventional tactile method with a standard periodontal probe by a single, trained examiner. A custom-made stent was prepared to standardize the measurements and the distance from a fixed reference point on the stent to the CEJ was measured before (apparent CEJ) and after (real CEJ) opening a gingival flap. To evaluate the effect of local anesthesia (LA) on the measurement error, assessment with and without LA given prior to the measurement was also evaluated. The bone crest-CEJ distance at each site was also recorded in all sites., Statistical Analysis: The measurement error of apparent versus real distance, if any, was compared using Cohen's weighted kappa coefficient (WKC) (± 1 mm)., Results: A weak WKC (WKC = 0.539) was found between the apparent and real CEJ distance. Higher WKCs were noted at posterior and proximal sites than the anterior and buccal/lingual sites, respectively (0.840 and 0.545 vs. 0.475 and 0.488). A higher confluence of the agreements was noted when CEJ distance was measured in anesthetized sites (WKC = 0.703). Sites without bone loss showed more coronal deviation of CEJ detection, as opposed to apical deviation seen at sites with bone loss., Conclusion: The conventional CEJ detection using the tactile method was relatively imprecise depending on the anatomical location of the tooth and the bone loss at the site of measurement. However, the detection accuracy improved when the sites were anesthetized. In clinical terms, our data, reported here for the first time imply that, in the absence of visual cues, posterior tooth site measurements of periodontal attachment loss were more reliable in comparison to the other sites. The bone crest level also impacted the measurement deviation to some extent, implying that, possible overestimate of clinical attachment loss may occur at sites without bone loss., Competing Interests: None declared, (The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/).)
- Published
- 2024
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- View/download PDF
4. Comparison of various morphological types of cementoenamel junction in ground section of permanent tooth
- Author
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Kundendu Arya Bishen, Himanshu Singh, Sushruth Nayak, Prachi Nayak, Urvashi Tomar, and Navneet Agrawal
- Subjects
cementoenamel junction ,edge-to-edge junction ,gap junction ,Dentistry ,RK1-715 - Abstract
Aim: The aim of the study was to assess the most common patterns of cementoenamel junction (CEJ) in permanent tooth and most common pattern of CEJ in males and females in permanent tooth. Materials and Methods: A total number of 120 permanent teeth were selected. The ground sections of these teeth were prepared in longitudinal plane. The cementoenamel junction of prepared ground sections was then analyzed and studied. Results: The edge-to-edge pattern of cementoenamel junction was the most common pattern observed, was followed by gap junction, cementum over enamel, and enamel over cementum. In males and females, the most common pattern of CEJ seen was same (edge-to-edge pattern), followed by gap, cementum over enamel, and enamel over cementum. Conclusion: In the present study, out of four patterns of cementoenamel junction, edge-to-edge pattern was the most commonly seen, followed by gap junction, cementum over enamel pattern, and enamel over cementum pattern.
- Published
- 2020
- Full Text
- View/download PDF
5. Micro-shear bond strength of resin composite cement to coronal enamel/dentin, cervical enamel, cementoenamel junction and root cementum with different adhesive systems
- Author
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Andermatt, Leonie and Andermatt, Leonie
- Abstract
The cervical area of teeth is the most unpredictable region for durable adhesive bonding. This study evaluated the adhesion potential of resin cement to coronal and cervical/root structures with a focus on enamel, dentin and cementum using etch-and-rinse and self-etch adhesive systems. Anterior teeth (N = 60) were randomly divided into six groups for adhesion tests: (a) unprepared enamel (UE), (b) ground enamel (GE), (c) mid-coronal dentin (D), (d) cervical enamel 2 mm above cementoenamel junction (CE), (e) cementoenamel junction (CEJ), and (f) root cementum (RC). Enamel and dentin surfaces were conditioned using either an etch-and-rinse (Syntac Classic-SY) or self-etch (Clearfil S3 Bond Plus-CS3) adhesive system. Resin cement (Variolink Esthetic) was adhered to the different substrates using polyethylene molds and photo-polymerized. Bonded specimens were stored in water for 24 h at 37 °C. Microshear tests (µSBT) were conducted in a Universal Testing Machine (1 mm/min) and failure types were analyzed after debonding. Data were analyzed using two-way ANOVA and t-test (alpha = 0.05). While substrate type (p < 0.001) and adhesive system (p < 0.001) significantly affected the bond results, interaction terms were not significant (p = 0.063). Within SY adhesive system, adhesion to all substrates were not significant ranging between (8.07 ± 2.39–6.80 ± 4.60) (p > 0.05), except for CEJ (5.19 ± 1.39) and RC (4.08 ± 1.13). With the CS3 adhesive system, all groups presented non-significant results (4.15 ± 1.35–6.04 + 2.38) (p > 0.05), except for D (3.57 ± 1.84) and RC (3.21 ± 1.13) (p < 0.05). µSBT values for D (7.19 ± 2.31) and RC (4.08 ± 1.13) were significantly higher for SY compared to that of CS3 (3.57 ± 1.84–3.21 ± 1.13, respectively) (p < 0.05).
- Published
- 2022
6. The "Hand as Foot" teaching method in the classification of cementoenamel junction.
- Author
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Zhang J, Liu H, and Shen Y
- Subjects
- Humans, Upper Extremity, Foot, Lower Extremity, Tooth Cervix, Hand
- Abstract
Competing Interests: Declaration of competing interest The authors declare that they have no conflict of interest.
- Published
- 2023
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7. An attempt to predict tooth crown height using cementoenamel junction diameters and implications in the quantitative study of dental wear
- Author
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Nikita, Efthymia and Chovalopoulou, Maria-Eleni
- Published
- 2016
8. Micro-shear bond strength of resin composite cement to coronal enamel/dentin, cervical enamel, cementoenamel junction and root cementum with different adhesive systems
- Author
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Andermatt, Leonie, Özcan, Mutlu; https://orcid.org/0000-0002-9623-6098, Andermatt, Leonie, and Özcan, Mutlu; https://orcid.org/0000-0002-9623-6098
- Abstract
The cervical area of teeth is the most unpredictable region for durable adhesive bonding. This study evaluated the adhesion potential of resin cement to coronal and cervical/root structures with a focus on enamel, dentin and cementum using etch-and-rinse and self-etch adhesive systems. Anterior teeth (N = 60) were randomly divided into six groups for adhesion tests: (a) unprepared enamel (UE), (b) ground enamel (GE), (c) mid-coronal dentin (D), (d) cervical enamel 2 mm above cementoenamel junction (CE), (e) cementoenamel junction (CEJ), and (f) root cementum (RC). Enamel and dentin surfaces were conditioned using either an etch-and-rinse (Syntac Classic-SY) or self-etch (Clearfil S3 Bond Plus-CS3) adhesive system. Resin cement (Variolink Esthetic) was adhered to the different substrates using polyethylene molds and photo-polymerized. Bonded specimens were stored in water for 24 h at 37 °C. Microshear tests (µSBT) were conducted in a Universal Testing Machine (1 mm/min) and failure types were analyzed after debonding. Data were analyzed using two-way ANOVA and t-test (alpha = 0.05). While substrate type (p < 0.001) and adhesive system (p < 0.001) significantly affected the bond results, interaction terms were not significant (p = 0.063). Within SY adhesive system, adhesion to all substrates were not significant ranging between (8.07 ± 2.39–6.80 ± 4.60) (p > 0.05), except for CEJ (5.19 ± 1.39) and RC (4.08 ± 1.13). With the CS3 adhesive system, all groups presented non-significant results (4.15 ± 1.35–6.04 + 2.38) (p > 0.05), except for D (3.57 ± 1.84) and RC (3.21 ± 1.13) (p < 0.05). µSBT values for D (7.19 ± 2.31) and RC (4.08 ± 1.13) were significantly higher for SY compared to that of CS3 (3.57 ± 1.84–3.21 ± 1.13, respectively) (p < 0.05).
- Published
- 2021
9. Cementoenamel Junction: Morphological Characterization in Nepali Population
- Author
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Adhikari, Bhoj Raj, primary, Shakya, Mamata, additional, Poudel, Pratibha, additional, Rijal, Arjun Hari, additional, Lamichhane, Simant, additional, Mahanta, Swagat Kumar, additional, Upadhyay, Chandan, additional, and Humagain, Manoj, additional
- Published
- 2023
- Full Text
- View/download PDF
10. Comparative Evaluation Shear Bond Strength of Resin Composite Cement to Coronal Enamel, Cementoenamel Junction and Root Cementum: An in Vitro Study
- Author
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Ganbote, Arnav, primary, Mahajan, Vishal, additional, Daule, Rajendra, additional, Dhoot, Rohit, additional, and Gaikwad, Bhavana, additional
- Published
- 2023
- Full Text
- View/download PDF
11. Comparison of various morphological types of cementoenamel junction in ground section of permanent tooth
- Author
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Sushruth Nayak, KundenduArya Bishen, Urvashi Tomar, Himanshu Singh, Navneet Agrawal, and Prachi Nayak
- Subjects
Orthodontics ,Longitudinal plane ,Materials science ,Permanent tooth ,Enamel paint ,RK1-715 ,gap junction ,Cementoenamel junction ,stomatognathic diseases ,medicine.anatomical_structure ,stomatognathic system ,visual_art ,Dentistry ,visual_art.visual_art_medium ,medicine ,edge-to-edge junction ,Cementum ,cementoenamel junction ,Permanent teeth - Abstract
Aim: The aim of the study was to assess the most common patterns of cementoenamel junction (CEJ) in permanent tooth and most common pattern of CEJ in males and females in permanent tooth. Materials and Methods: A total number of 120 permanent teeth were selected. The ground sections of these teeth were prepared in longitudinal plane. The cementoenamel junction of prepared ground sections was then analyzed and studied. Results: The edge-to-edge pattern of cementoenamel junction was the most common pattern observed, was followed by gap junction, cementum over enamel, and enamel over cementum. In males and females, the most common pattern of CEJ seen was same (edge-to-edge pattern), followed by gap, cementum over enamel, and enamel over cementum. Conclusion: In the present study, out of four patterns of cementoenamel junction, edge-to-edge pattern was the most commonly seen, followed by gap junction, cementum over enamel pattern, and enamel over cementum pattern.
- Published
- 2020
12. Surgical root repair of extensive invasive cervical resorption defects involving the cementoenamel junction: Two case reports
- Author
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Ritu Sharma, Anuja Swami, and B V Smitha
- Subjects
External root resorption ,glass ionomer cement root repair ,invasive cervical resorption ,root repair ,root restorations ,Dentistry ,RK1-715 - Abstract
Extensive invasive cervical resorption (ICR) defects involving the cementoenamel junction has a poor periodontal, restorative, and structural prognosis. However, some patients may insist upon surgical restorative repair of these lesions. Two such treated cases are reported with 15 and 12 month follow–up, respectively. In one case, glass ionomer cement, and in the other case, composite resin with fiber post, were used for restoration, after thorough surgical debridement. Both the patients were available for close follow-ups and maintained scrupulous oral hygiene. In both cases, the teeth had poor prognosis due to high chance of tooth fracture and possible continued periodontal breakdown with bone loss. However, at the above-stated follow-up periods, the teeth remained asymptomatic, periodontally stable, and structurally intact. This supports that a surgical restorative treatment, of the extensive ICR lesion, may result in short-term success and tooth retention.
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- 2018
- Full Text
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13. Comparison of diameters at the cementoenamel junction between South Asians and Japanese
- Author
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Nose, Hirohisa, Tawada, Yasuyuki, Watanabe, Fumihiko, and Kageyama, Ikuo
- Published
- 2011
- Full Text
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14. Micro-shear bond strength of resin composite cement to coronal enamel/dentin, cervical enamel, cementoenamel junction and root cementum with different adhesive systems
- Author
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Mutlu Özcan, Leonie Andermatt, University of Zurich, and Özcan, Mutlu
- Subjects
Materials science ,Adhesive bonding ,610 Medicine & health ,1600 General Chemistry ,02 engineering and technology ,Coatings and Films ,10068 Clinic of Reconstructive Dentistry ,03 medical and health sciences ,2211 Mechanics of Materials ,0302 clinical medicine ,stomatognathic system ,Materials Chemistry ,medicine ,Dentin ,Cementum ,Composite material ,2505 Materials Chemistry ,Cement ,Enamel paint ,Bond strength ,2508 Surfaces, Coatings and Films ,technology, industry, and agriculture ,3110 Surfaces and Interfaces ,030206 dentistry ,Surfaces and Interfaces ,General Chemistry ,021001 nanoscience & nanotechnology ,Surfaces, Coatings and Films ,Surfaces ,Cementoenamel junction ,medicine.anatomical_structure ,Mechanics of Materials ,visual_art ,visual_art.visual_art_medium ,Adhesive ,0210 nano-technology - Abstract
The cervical area of teeth is the most unpredictable region for durable adhesive bonding. This study evaluated the adhesion potential of resin cement to coronal and cervical/root structures with a ...
- Published
- 2021
15. Morphology of the Cementoenamel Junction in Permanent Teeth of Dogs: A Scanning Electron Microscopic Study.
- Author
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Hernández, Sabás Z., Negro, Viviana B., de Puch, Georgina, and Saccomanno, Daniela M.
- Subjects
TOOTH cervix ,DENTAL enamel ,TEETH ,ANIMAL morphology ,DOGS ,CEMENTUM - Abstract
In human teeth, the cementoenamel junction (CEJ) can have different morphologies, known as Choquet cases or types: in type 1, the cementum overlaps the enamel; in type 2, the enamel overlaps the cementum; in type 3, the relationship between the cementum and enamel is edge-to-edge; and in type 4, there is a gap between the enamel and the cementum, with exposed dentin. Since little is known on the morphology of the CEJ in animals, the aim of this study was to characterize the structure of the CEJ of dog teeth by SEM. We studied 82 permanent teeth extracted from 4 dogs of similar size, aged from 7 months to 2 years. Teeth were grouped according to their size, sectioned and prepared for SEM. The teeth evaluated showed the 4 CEJ types. Type 3 was the most prevalent, being present, either alone or in combination, in 90.79% of the samples, followed by type 4 (present in 31.58% of the samples). Of the samples, 65.13% showed only one type, while 34.87% presented a combination of them. Types 3 and 4 were the only ones present alone (in 55.92% and 9.21% of the samples respectively), whereas the combinations between types 3 and 4 (20.40%) and types 1 and 3 (9.87%) were the most frequent. In all combinations, type 3 was predominant. The CEJ of the dogs evaluated showed a high degree of variability in the different types of teeth, within a same tooth, within the dentition of a single individual, and among individuals. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
16. Relation between the distance from the cementoenamel junction to the bone crest and the thickness of the facial bone in anterior maxillary teeth: A cross-sectional tomographic study
- Author
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Miguel Peñarrocha-Diago, David Peñarrocha-Oltra, R Zaragozí-Alonso, Jose Viña-Almunia, and Julio Rojo-Sanchis
- Subjects
Facial bone ,Tooth Cervix ,03 medical and health sciences ,0302 clinical medicine ,Alveolar Process ,Maxilla ,medicine ,Humans ,Maxillary central incisor ,General Dentistry ,Anterior teeth ,Dental alveolus ,Retrospective Studies ,Orthodontics ,business.industry ,Research ,Alveolar process ,030206 dentistry ,Cone-Beam Computed Tomography ,CIENCIAS MÉDICAS [UNESCO] ,stomatognathic diseases ,Cementoenamel junction ,Cross-Sectional Studies ,medicine.anatomical_structure ,Otorhinolaryngology ,UNESCO::CIENCIAS MÉDICAS ,Surgery ,Oral Surgery ,business - Abstract
Background The purpose of this cross-sectional study was to evaluate radiologically, the relation between the distance from the cementoenamel junction (CEJ) to the facial bone crest (FBC), and the facial alveolar bone (FAB) width at maxillary anterior teeth. A further aim was to assess if the CEJ-FBC distance had an impact in the prevalence to find a FAB thickness greater than one mm. Material and Methods CBCT images were retrospectively obtained from the database of the Oral Surgery Unit of the University of Valencia. The teeth were divided in 3 groups according to the CEJ-FBC distance: Shorter (≤3mm), Middle (>3 ≤4.5 mm) and Larger (>4.5 mm). FAB thickness was measured by two different examiners at 1, 2 and 3 mm apical to the FBC. Normality of means were evaluated by Kolmogorov-Smirnov test and an ANOVA-type linear model was performed. Results 82 patients were included in the study, with 156 central incisors, 149 lateral incisors and 152 canines analyzed. A significant greater FAB thickness in Shorter (≤3mm CEJ-FBC) than Middle and Larger group was observed in all distances measured apical to the FBC. There was a significant inverse relation between the distance CEJ-FBC and FAB thickness at all distances measured. The prevalence of a FAB thickness equal or greater than one mm was 35.9% of all teeth analyzed from Shorter, 17.4% of Middle and 8.9% of Larger group at 1 mm apical to the FBC. Conclusions When the distance from the CEJ to the FBC is augmented, thinner FAB thickness has to be expected in all teeth of the anterior maxilla. The prevalence to find a FAB thicker than one mm decreases as the distance from the FBC to the CEJ increases. Key words:Facial bone, alveolar bone, cone-beam computed tomography, CEJ, maxillary teeth.
- Published
- 2019
17. Sex-related differences in the distance of the mental foramen to the cementoenamel junction in adults: a study using cone beam computed tomography.
- Author
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Carlson, Emanouela D., Stubbs, Andrew, Chandrasekaran, Sangeetha, Robles, Beatriz, Kolanda, Richard, Gohel, Anita, and Sarkis, Ramzi
- Subjects
BICUSPIDS ,COMPUTED tomography ,MANDIBLE ,SEX distribution ,RETROSPECTIVE studies ,TOOTH cervix - Abstract
Injury to the contents of the mental foramen (MF) can be minimized by using cone beam computed tomography (CBCT) to determine the exact location of the MF prior to surgical procedures. In this retrospective study, variations in the vertical position of the MF between adult men and women older than 18 years were investigated using CBCT. The distance between the superior border of the MF and the most apical aspect of the cementoenamel junction (CEJ) of the mandibular second premolar was measured. Among the randomly accessed CBCT records of 200 patients, 176 MF-CEJ measurements met the inclusion criteria. There was a statistically significant difference (P < 0.001) between the sexes in the location of the MF. The distance in women was shorter by an average of 2.00 mm, irrespective of the side of the mandible. Additionally, a within-sex asymmetry between right and left sides was observed; the asymmetry was significantly greater in men than in women (P < 0.05). Clinicians should be cognizant of the influence of the patient's sex on the vertical position of the MF and the presence of asymmetry in the position of the MF between the right and left sides of the mandible within the sex groups. [ABSTRACT FROM AUTHOR]
- Published
- 2019
18. Morphological analysis of cementoenamel junction in premolars of Sri Lankans
- Author
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Deepthi Nanayakkara, Tharanga Nandasena, Gayani Nawarathna, Anushka Abeysundara, Roshan Peiris, Dhammika Ihalagedera, Shyama Banneheka, and Kapila Arambawatta
- Subjects
Male ,Dental radiography ,Adolescent ,medicine.medical_treatment ,Biology ,Tooth Cervix ,Crown (dentistry) ,03 medical and health sciences ,stomatognathic system ,medicine ,Premolar ,Humans ,Bicuspid ,Cementum ,Child ,030304 developmental biology ,Sri Lanka ,Orthodontics ,0303 health sciences ,Enamel paint ,medicine.diagnostic_test ,General Medicine ,Anatomical landmark ,stomatognathic diseases ,Cementoenamel junction ,medicine.anatomical_structure ,030301 anatomy & morphology ,visual_art ,Morphological analysis ,visual_art.visual_art_medium ,Female ,Anatomy - Abstract
Cementoenamel junction is an anatomical landmark which indicates the meeting point of enamel of the crown and the cementum of the root. It is an important reference point in clinical dentistry as well as in dental radiography. The present study is done to describe the distribution of the mineralized tissue at the cementoenamel junction in relation to various surfaces of the premolars. The study sample consisted of 89 permanent maxillary and mandibular premolars from both males and females extracted for orthodontic reasons. They were stained with carbol fuchsin and observed under a dissecting microscope to identify the following tissue interrelationships at the cementoenamel junction: cementum overlapping the enamel; edge-to-edge relationship between enamel and cementum; gap between the enamel and cementum and enamel overlapping the cementum. The cementum overlapping the enamel interrelationship was predominant in the buccal and lingual surfaces of both first and second maxillary premolars, while the edge-to-edge relationship and the presence of a gap between the enamel and the cementum relationship were abundant in distal and mesial sides. Enamel overlapping the cementum was recorded only in a very small proportion of the sample. A good understanding about the morphological variations at the cementoenamel junction area is very important and this area should be handled carefully during routine dental procedures such as dental bleaching, orthodontic treatment, placement of rubber dam and placement of dental materials.
- Published
- 2020
19. Morphology of the Cementoenamel Junction in Permanent Teeth of Dogs: A Scanning Electron Microscopic Study
- Author
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Sabás Z. Hernández, Viviana B. Negro, D.M. Saccomanno, and Georgina de Puch
- Subjects
Morphology (linguistics) ,Scanning electron microscope ,Dentistry ,Electrons ,Tooth Cervix ,03 medical and health sciences ,0302 clinical medicine ,Dogs ,stomatognathic system ,medicine ,Dentin ,Animals ,Humans ,030216 legal & forensic medicine ,Cementum ,Dental Enamel ,Permanent teeth ,Dental Cementum ,General Veterinary ,Enamel paint ,Dentition ,business.industry ,030206 dentistry ,stomatognathic diseases ,Cementoenamel junction ,medicine.anatomical_structure ,visual_art ,visual_art.visual_art_medium ,Microscopy, Electron, Scanning ,business - Abstract
In human teeth, the cementoenamel junction (CEJ) can have different morphologies, known as Choquet cases or types: in type 1, the cementum overlaps the enamel; in type 2, the enamel overlaps the cementum; in type 3, the relationship between the cementum and enamel is edge-to-edge; and in type 4, there is a gap between the enamel and the cementum, with exposed dentin. Since little is known on the morphology of the CEJ in animals, the aim of this study was to characterize the structure of the CEJ of dog teeth by SEM. We studied 82 permanent teeth extracted from 4 dogs of similar size, aged from 7 months to 2 years. Teeth were grouped according to their size, sectioned and prepared for SEM. The teeth evaluated showed the 4 CEJ types. Type 3 was the most prevalent, being present, either alone or in combination, in 90.79% of the samples, followed by type 4 (present in 31.58% of the samples). Of the samples, 65.13% showed only one type, while 34.87% presented a combination of them. Types 3 and 4 were the only ones present alone (in 55.92% and 9.21% of the samples respectively), whereas the combinations between types 3 and 4 (20.40%) and types 1 and 3 (9.87%) were the most frequent. In all combinations, type 3 was predominant. The CEJ of the dogs evaluated showed a high degree of variability in the different types of teeth, within a same tooth, within the dentition of a single individual, and among individuals.
- Published
- 2020
20. Localization of cementoenamel junction in intraoral ultrasonographs with machine learning.
- Author
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Nguyen KT, Le BM, Li M, Almeida FT, Major PW, Kaipatur NR, Lou EHM, Punithakumar K, and Le LH
- Subjects
- Humans, Machine Learning, Professional Role, Reproducibility of Results, Dentists, Tooth Cervix
- Abstract
Objective: Our goal was to automatically identify the cementoenamel junction (CEJ) location in ultrasound images using deep convolution neural networks (CNNs)., Methods: Three CNNs were evaluated using 1400 images and data augmentation. The training and validation were performed by an experienced nonclinical rater with 1000 and 200 images, respectively. Four clinical raters with different levels of experience with ultrasound tested the networks using the other 200 images. In addition to the comparison of the best approach with each rater, we also employed the simultaneous truth and performance level estimation (STAPLE) algorithm to estimate a ground truth based on all labelings by four clinical raters. The final CEJ location estimate was obtained by taking the first moment of the posterior probability computed using the STAPLE algorithm. The study also computed the machine learning-measured CEJ-alveolar bone crest distance., Results: Quantitative evaluations of the 200 images showed that the comparison of the best approach with the STAPLE-estimate yielded a mean difference (MD) of 0.26 mm, which is close to the comparison with the most experienced nonclinical rater (MD=0.25 mm) but far better than the comparison with clinical raters (MD=0.27-0.33 mm). The machine learning-measured CEJ-alveolar bone crest distances correlated strongly (R = 0.933, p < 0.001) with the manual clinical labeling and the measurements were in good agreement with the 95% Bland-Altman's lines of agreement between -0.68 and 0.57 mm., Conclusions: The study demonstrated the feasible use of machine learning methodology to localize CEJ in ultrasound images with clinically acceptable accuracy and reliability. Likelihood-weighted ground truth by combining multiple labels by the clinical experts compared favorably with the predictions by the best deep CNN approach., Clinical Significance: Identification of CEJ and its distance from the alveolar bone crest play an important role in the evaluation of periodontal status. Machine learning algorithms can learn from complex features in ultrasound images and have potential to provide a reliable and accurate identification in subsecond. This will greatly assist dental practitioners to provide better point-of-care to patients and enhance the throughput of dental care., (Copyright © 2021. Published by Elsevier Ltd.)
- Published
- 2021
- Full Text
- View/download PDF
21. Coronal Cementum in Molar of Naumann’s Elephant (Palaeoloxodon naumanni)-Review of Cementoenamel Junction
- Subjects
歯冠セメント質 ,エナメルセメント境 ,Naumann’s elephant ,coronal cementum ,ナウマンゾウ ,cementoenamel junction ,Thesis or Dissertation - Published
- 2020
22. Localization of cementoenamel junction in intraoral ultrasonographs with machine learning
- Author
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Lawrence H. Le, Paul W. Major, Neelambar R. Kaipatur, Binh M. Le, Fabiana Tolentino Almeida, Kim-Cuong T. Nguyen, Edmond Lou, Mengxun Li, and Kumaradevan Punithakumar
- Subjects
Computer science ,Dentists ,Posterior probability ,Machine learning ,computer.software_genre ,Tooth Cervix ,Machine Learning ,03 medical and health sciences ,Professional Role ,0302 clinical medicine ,Medical imaging ,Humans ,General Dentistry ,Reliability (statistics) ,030304 developmental biology ,0303 health sciences ,Ground truth ,Artificial neural network ,business.industry ,Deep learning ,Ultrasound ,Reproducibility of Results ,030206 dentistry ,Cementoenamel junction ,Artificial intelligence ,business ,computer - Abstract
Our goal was to automatically identify the cementoenamel junction (CEJ) location in ultrasound images using deep convolution neural networks (CNNs).Three CNNs were evaluated using 1400 images and data augmentation. The training and validation were performed by an experienced nonclinical rater with 1000 and 200 images, respectively. Four clinical raters with different levels of experience with ultrasound tested the networks using the other 200 images. In addition to the comparison of the best approach with each rater, we also employed the simultaneous truth and performance level estimation (STAPLE) algorithm to estimate a ground truth based on all labelings by four clinical raters. The final CEJ location estimate was obtained by taking the first moment of the posterior probability computed using the STAPLE algorithm. The study also computed the machine learning-measured CEJ-alveolar bone crest distance.Quantitative evaluations of the 200 images showed that the comparison of the best approach with the STAPLE-estimate yielded a mean difference (MD) of 0.26 mm, which is close to the comparison with the most experienced nonclinical rater (MD=0.25 mm) but far better than the comparison with clinical raters (MD=0.27-0.33 mm). The machine learning-measured CEJ-alveolar bone crest distances correlated strongly (R = 0.933, p0.001) with the manual clinical labeling and the measurements were in good agreement with the 95% Bland-Altman's lines of agreement between -0.68 and 0.57 mm.The study demonstrated the feasible use of machine learning methodology to localize CEJ in ultrasound images with clinically acceptable accuracy and reliability. Likelihood-weighted ground truth by combining multiple labels by the clinical experts compared favorably with the predictions by the best deep CNN approach.Identification of CEJ and its distance from the alveolar bone crest play an important role in the evaluation of periodontal status. Machine learning algorithms can learn from complex features in ultrasound images and have potential to provide a reliable and accurate identification in subsecond. This will greatly assist dental practitioners to provide better point-of-care to patients and enhance the throughput of dental care.
- Published
- 2021
23. Radioanatomic image of alveolar bone crest, cementoenamel junction and dental apex in orthopantomograph 100 panoramic radiography
- Author
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Yeni Rahmawati, A. Azhari, and Belly Sam
- Subjects
panoramic radiography, orthopantomograph 100, alveolar bone crest, cementoenamel junction, dental apex, radioanatomy. ,Dentistry ,RK1-715 - Abstract
Panoramic radiography can be used in most dentomaxillofacial procedures, that can give a wide coverage of teeth and supporting tissue for assisting diagnosis. The aim of this research was to obtain data about the validity of panoramic radiography for measuring radioanatomy alveolar bone crest, cementoenamel junction (CEJ), and dental apex which is useful in measuring the level of alveolar bone resorption. This descriptive research and measurement was done to 25 sample which fulfilled sample criteria from panoramic radiography result by orthopantomograph 100. This research was done with Ramfjord criteria radioanatomy point. The result of this research showed that the average value measured of alveolar bone crest from the entire region was about 41.67%, most value at the mandibular molar was about 92%, the least value at the maxillary premolar was about 0%. The average value measured of CEJ from entire region was about 11%, most value at the maxillary molar and mandibular molar about 26%, at least value at the maxillary incisor, mandibular incisor, and maxillary premolar were about 0%. The average value measured of dental apex from the entire region was about 56.33%, most value at the mandibular molar was about 96%, the least value at the maxillary premolar was about 8%. The conclusion of this research was a part of radioanatomy alveolar bone crest and a part of dental apex could be measured, while CEJ at least measured. Measurement from the three of radioanatomy point showed the mandibular molar region which was at most measured.
- Published
- 2007
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24. Papillary Height and its Relation with Interproximal Distances and Cementoenamel Junction in Subjects with Chronic Periodontitis. A Cross-Sectional Study
- Author
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Nishi Tanwar, Satish Chander Narula, Rajender Kumar Sharma, and Shikha Tewari
- Subjects
aesthetics ,black triangles ,gingiva ,surgical flap ,Medicine - Abstract
Introduction: Presence of intact interdental papilla is considered as an essential component of aesthetic dentistry. Loss or absence of interdental papilla creates black triangles which are unpleasing. Aim: The purpose of the present study was to determine relation of interproximal distances and cementoenamel junction with the classification of interdental papilla recession after surgical exposure in chronic periodontitis patients. Materials and Methods: This cross-sectional, single masked study group involved 198 interdental papillae in 50 chronic periodontitis patients subjected to open flap debridement. The subjects were divided into three groups according to loss of height of interdental papillae: Class I papilla, Class II papilla, Class III papilla. The interproximal distances included vertical and horizontal distance. The vertical distance was measured from apical point of the contact area to alveolar crest; horizontal distance was measured between roots at the alveolar crest. Distance from mid buccal cementoenamel junction to apical point of the contact area was also measured. Results: The vertical distance was found to be significantly affecting all the classes of loss of papillary height (p
- Published
- 2016
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25. Cementoenamel junction: An insight
- Author
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Kharidi Laxman Vandana and Ryana Kour Haneet
- Subjects
Cemento-enamel junction ,comparison ,deciduous ,permanent dentition ,Dentistry ,RK1-715 - Abstract
The location and nature of cemento-enamel junction (CEJ) are more than descriptive terms used simply to describe some aspects of tooth morphology; however, CEJ gains a lot of clinical significance due to various measurements dependent on it. It may be necessary to determine the location and pathological changes occurring at CEJ to make a diagnosis and treat diseases pertaining to epithelial attachment and gingival margin. However, the information related to CEJ is not discussed commonly. Hence, the present review paper provides an insight on CEJ in both primary and permanent dentition.
- Published
- 2014
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26. Cone beam computed tomography evaluation of distance from cementoenamel junction to alveolar crest before and after nonextraction orthodontic treatment.
- Author
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Castro, Luma O., Castro, Iury O., de Alencar, Ana Helena G., Valladares-Neto, Jos, and Estrela, Carlos
- Subjects
TOOTH cervix ,ALVEOLAR process ,CONE beam computed tomography ,INCISORS ,ORTHODONTICS - Abstract
The article provides information on a research study based on analysis of distance between cementoenamel junction and alveolar crest using cone beam computed tomography. Topics discussed include nonextraction of orthodontic treatment, analysis of central incisors and cementoenamel junction, and changes in marginal bones.
- Published
- 2016
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27. An attempt to predict tooth crown height using cementoenamel junction diameters and implications in the quantitative study of dental wear
- Author
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Efthymia Nikita and Maria-Eleni Chovalopoulou
- Subjects
Adult ,Male ,Molar ,Adolescent ,medicine.medical_treatment ,Dental Wear ,Dentistry ,Tooth Cervix ,Crown (dentistry) ,Tooth crown ,Anthropology, Physical ,Young Adult ,stomatognathic system ,Linear regression ,medicine ,Humans ,Child ,Ecology, Evolution, Behavior and Systematics ,Mathematics ,Tooth Crown ,Orthodontics ,Anthropometry ,business.industry ,General Medicine ,stomatognathic diseases ,Cementoenamel junction ,Tooth wear ,Anthropology ,Female ,Animal Science and Zoology ,Tooth Wear ,business - Abstract
SUMMARY Dental wear has been used extensively in osteoarchaeological studies as a means of exploring dietary patterns and the use of teeth as tools. The present paper aims to test whether crown height can be predicted for premolars and molars based on the mesiodistal and buccolingual diameters of these teeth at the level of the cementoenamel junction (CEJ). Multiple linear regression was used with crown height as dependent variable and diameters at the CEJ as predictors. Our results found that there are cases where the impact of one predictor appears to be statistically significant. However, even in these cases the 95% confidence interval for the predicted value is so broad that makes the accurate determination of the crown height based on the buccolingual or/and mesiodistal diameters at the CEJ impossible.
- Published
- 2016
28. Evaluation of the Correlation of (He Distance Between the Alveolar Crest and Cementoenamel Junction Inpreiapical. Bitewing and Panoramic Radiographs with its Actual Distance
- Author
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J. Yazdani, F. Kaviarri, and MT. Chiisazi
- Subjects
Alveolar Crest ,Periapical Radiography ,Panoramic Radiography ,Bone Loss ,Bitewing Radiography ,Medicine ,Dentistry ,RK1-715 - Abstract
Statement of Problem: In spite of the limitations of Radiography, diagnosing of periodontal diseases without having accurate radiographs is inadequate because it provides a visible image of the supporting bone to the clinician and works as a fixed measure of the supporting bone during the study.Purpose: The aim of this study is to compare the precision of preiapical, bitewings and panoramicradiographs in determining the distance between the alveolar crest (AC) and cementoenamel junction (CEJ) of teeth. Materials and Methods: Statistically this is a survey study in which 120 interproximal surfaces of teeth were measured during surgery by periodontal probing and recorded as the actual measurement. Then 40 sites underwent bitewing, 40 sites preapical and 40 others panoramic radiography and the distance of CEJ up to the alveolar crest of bone was measured on them by periodontal probe and recorded. Then each group was analyzed separately and the Pearson's correlation coefficient was examined for the data.Results: The results of this study showed that when the thickness of the remaining bone in a millimeter limit is important for (he surgeon, the bitewing radiography has a prime importance, but when bone loss ismoderate, the panoramic radiography showing %89 of the cases close to the actual measure, can be acceptable. On the other hand, in anterior sites for determining the bone alteration, preiapical radiography with a 0.93 correlation coefficient is superior to the panoramic radiography with a correlation coefficient of 0.72 and we suggest it for examining the changes of bone in these sites. Conclusion: whenever the bone alteration is moderate or severe, it seems that, bitewing radiography is of particular importance, but when the bone loss is little, panoramic radiography can be used and there is no needto put the patient on unnecessary radiation.
- Published
- 2005
29. Morphological analysis of anterior permanent dentition in a Chinese population using cone-beam computed tomography
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Chen, Yu, Dai, Yu, Yan, Zhengbin, You, Yuehua, Wu, Bin, and Lu, Bingtai
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- 2023
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30. Micro-shear bond strength of resin composite cement to coronal enamel/dentin, cervical enamel, cementoenamel junction and root cementum with different adhesive systems
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Andermatt, Leonie, primary and Özcan, Mutlu, additional
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- 2021
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31. Determination the distance from cementoenamel junction to crest alveolar bone during eleven years of the initial orthodontic treatment
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Castro, Luma Oliveira, Estrela, Carlos, Alencar, Ana Helena Gonçalves de, Siqueira, Patrícia Correia de, Silva, Julio Almeida, and Pecora, Jesus Djalma
- Subjects
Processo Alveolar ,ODONTOLOGIA [CIENCIAS DA SAUDE] ,Cone beam computed tomography ,Tomografia computadorizada de feixe cônico ,Orthodontics ,Alveolar process ,Ortodontia - Abstract
Objetivo: O objetivo do presente estudo foi determinar, por meio de imagens de Tomografia Computadorizada de Feixe Cônico (TCFC), a distância entre a junção amelocementária e a crista óssea alveolar em dentes submetidos à tratamento ortodôntico, após 11 anos de acompanhamento. Metodologia: Foram selecionadas, de um banco de dados, imagens de TCFC odontológicas, de pacientes que seriam submetidos ao tratamento ortodôntico (T1). Os pontos de referências para as mensurações foram a junção amelocementária e a crista óssea alveolar vestibulares e palatais/linguais, sendo determinados por meio da navegação nos cortes sagital, axial e coronal. Com o auxilio do software, foi traçada uma linha reta vertical entre os dois pontos, e a distância entre a junção amelocementária à crista óssea alveolar das faces vestibular (n=379) e palatal/lingual (n=379) obtida em milímetros. Em acompanhamento após 11 anos, a distância da junção amelocementária à crista óssea alveolar foi novamente mensurada seguindo o protocolo descrito anteriormente (T2). Resultados: Após 11 anos houve aumento da distância da junção amelocementária à crista óssea alveolar em todos os grupos dentários avaliados. Do total de 758 faces avaliadas, 81% (614) apresentavam aumento da distância quando comparada a inicial. A face vestibular dos caninos inferiores foi a que apresentou maior frequência de aumento (91%). Na amostra inicial, 117 (15%) faces apresentaram distância maior que 2 mm enquanto que 11 anos após, 327(43%), sendo a face vestibular de canino inferior a que apresentou maior frequência. Conclusão: Os resultados do presente estudo demonstraram que após decorridos 11 anos do início do tratamento ortodôntico, houve aumento da distância da junção amelocementária à crista óssea alveolar em todos os grupos dentários avaliados. Objective: The objective of the present study was to determine, by means of Cone-Beam Computed Tomography (CBCT) images, the distance between the cementoenamel junction and the alveolar bone crest in teeth undergoing orthodontic treatment after 11 years of follow-up. Methodology: Dental CBCT images of patients undergoing orthodontic treatment (T1) were selected from a database. The reference points for the measurements were the cementoenamel junction and the buccal and palatal / lingual alveolar bone crest, being determined by navigating the sagittal, axial and coronal sections. With the aid of the software, a vertical straight line was drawn between the two points, and the distance between the cementoenamel junction to the alveolar bone crest of the buccal (n = 379) and palatal / lingual (n = 379) faces obtained in millimeters. At follow-up after 11 years, the distance from the cementoenamel junction to the alveolar bone crest was again measured following the protocol previously described (T2). Results: After 11 years, there was an increase in the distance from the cementoenamel junction to the alveolar bone crest in all dental groups evaluated. From the total of 758 faces evaluated, 81% (614) presented increased distance when compared to the initial. The buccal face of the lower canines showed the highest frequency of enlargement (91%). In the initial sample, 117 (15%) faces presented a distance greater than 2 mm, while 11 years later, 327 (43%), and the canine buccal face was the one with the highest frequency. Conclusion: The results of the present study showed that 11 years after the beginning of orthodontic treatment, there was an increase in the distance from the cementoenamel junction to the alveolar bone crest in all dental groups evaluated. Outro
- Published
- 2019
32. Morphological Analysis Of Cementoenamel Junction Types In Premolars And Molars Of A Sample Of Pakistani Population.
- Author
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Ansari AS, Sheikh AT, Ahmed I, and Abbas Zaidi SJ
- Subjects
- Adult, Cross-Sectional Studies, Female, Humans, Male, Pakistan epidemiology, Bicuspid anatomy & histology, Molar anatomy & histology, Tooth Cervix anatomy & histology
- Abstract
Background: Cementoenamel junction represents the demarcation between enamel covered crown and cementum covered root surface. There is paucity of population specific data of the morphological variability of cementoenamel junctions of permanent and primary teeth. The objective of this study was to investigate the morphological diversity and interrelationship of cementoenamel junction of premolar and molar teeth in permanent dentition of a sample of Pakistani population with potential forensic and anthropological implications., Methods: This cross-sectional study was conducted at Oral Biology department of Dr Ishrat ul Ebad khan institute of oral health science, Dow University from March till September 2016. Seventy-five maxillary and mandibular permanent premolar and molars from adult patients of both sexes were selected and sectioned. Longitudinal ground sections were prepared to study the morphological interrelationship between Cementum and Enamel in each specimen to be viewed under light microscope. A chi-square test was applied between the categorical variables., Results: Results showed 57.3% of sections had cementum overlapping enamel interrelation, 32% showed edge to edge cementum and enamel relation and 9.3% showed that cementum and enamel failed to meet resulting in exposed dentine, while 1.3% sample showed enamel over cementum relation. No significant correlation was found between gender, type of tooth, maxillary, mandibular arches and the morphological variation of CEJ (p>0.05)., Conclusions: It can be concluded that there are considerable morphological variations in CEJ of premolars and molars with preponderance of cementum overlapping enamel in these teeth. Based on these findings, dentists are advised to be mindful of dental procedures involving the CEJ and that these interventions should be performed meticulously avoiding any detachment of cementum and subsequent exposure of dentin resulting in dentin hypersensitivity.
- Published
- 2019
33. Cementoenamel junction: An insight
- Author
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Ryana Kour Haneet and Kharidi Laxman Vandana
- Subjects
Orthodontics ,business.industry ,Permanent dentition ,Cemento-enamel junction ,Dentistry ,Review Article ,Epithelial Attachment ,Tooth morphology ,lcsh:RK1-715 ,Cementoenamel junction ,comparison ,permanent dentition ,lcsh:Dentistry ,Periodontics ,Medicine ,business ,Gingival margin ,deciduous - Abstract
The location and nature of cemento-enamel junction (CEJ) are more than descriptive terms used simply to describe some aspects of tooth morphology; however, CEJ gains a lot of clinical significance due to various measurements dependent on it. It may be necessary to determine the location and pathological changes occurring at CEJ to make a diagnosis and treat diseases pertaining to epithelial attachment and gingival margin. However, the information related to CEJ is not discussed commonly. Hence, the present review paper provides an insight on CEJ in both primary and permanent dentition.
- Published
- 2014
34. Comparison of various morphological types of cementoenamel junction in ground section of permanent tooth
- Author
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Singh, Himanshu, primary, Bishen, KundenduArya, additional, Nayak, Sushruth, additional, Nayak, Prachi, additional, Tomar, Urvashi, additional, and Agrawal, Navneet, additional
- Published
- 2020
- Full Text
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35. Comparison of diameters at the cementoenamel junction between South Asians and Japanese
- Author
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Yasuyuki Tawada, Hirohisa Nose, Fumihiko Watanabe, and Ikuo Kageyama
- Subjects
Male ,South asia ,business.industry ,India ,Dentistry ,Tooth Cervix ,White People ,stomatognathic diseases ,Cementoenamel junction ,Sex Factors ,medicine.anatomical_structure ,Asian People ,Japan ,stomatognathic system ,Premolar ,medicine ,Humans ,Odontometry ,Female ,Racial differences ,Upper central incisor ,business ,General Dentistry ,Asia, Southeastern - Abstract
Previously, sex differences among the various tooth types in Japanese skulls were examined to facilitate choosing an implant diameter similar to the cervical diameter of each tooth, and it was found that mesiodistal diameters at the cementoenamel junction were narrower in women than in men. Also interesting and relevant to the selection of implant diameter is the possible existence of racial differences in diameters at the cementoenamel junction. The purpose of this research was to test the hypothesis that the diameter at the cementoenamel junction of the tooth differs in humans of different races. We compared 106 skulls of unknown sex collected from South Asia with the skulls of Japanese women. Our conclusions are as follows: (1) Except for the lower canine, no significant racial differences were found in the labiolingual diameter of any teeth. (2) Except for the upper canine, upper central incisor, lower second premolar, and lower first premolar, a significant racial difference was found in the mesiodistal diameter. In all teeth in which this value differed, the mesiodistal diameters of South Asians were narrower than those of Japanese women, except for the lower canine. (3) The labiolingual and mesiodistal diameters of the lower canine were significantly larger in South Asians than in Japanese women. (4) Among South Asians, no significant left/right differences were found in the diameter at the cementoenamel junction of any tooth.
- Published
- 2011
36. Relation between the distance from the cementoenamel junction to the bone crest and the thickness of the facial bone in anterior maxillary teeth: A cross-sectional tomographic study.
- Author
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Rojo-Sanchis J, Peñarrocha-Oltra D, Peñarrocha-Diago M, Zaragozí-Alonso R, and Viña-Almunia J
- Subjects
- Cone-Beam Computed Tomography, Cross-Sectional Studies, Humans, Maxilla, Retrospective Studies, Alveolar Process, Tooth Cervix
- Abstract
Background: The purpose of this cross-sectional study was to evaluate radiologically, the relation between the distance from the cementoenamel junction (CEJ) to the facial bone crest (FBC), and the facial alveolar bone (FAB) width at maxillary anterior teeth. A further aim was to assess if the CEJ-FBC distance had an impact in the prevalence to find a FAB thickness greater than one mm., Study Design: CBCT images were retrospectively obtained from the database of the Oral Surgery Unit of the University of Valencia. The teeth were divided in 3 groups according to the CEJ-FBC distance: Shorter (≤3mm), Middle (>3 ≤4.5 mm) and Larger (>4.5 mm). FAB thickness was measured by two different examiners at 1, 2 and 3 mm apical to the FBC. Normality of means were evaluated by Kolmogorov-Smirnov test and an ANOVA-type linear model was performed., Results: 82 patients were included in the study, with 156 central incisors, 149 lateral incisors and 152 canines analyzed. A significant greater FAB thickness in Shorter (≤3mm CEJ-FBC) than Middle and Larger group was observed in all distances measured apical to the FBC. There was a significant inverse relation between the distance CEJ-FBC and FAB thickness at all distances measured. The prevalence of a FAB thickness equal or greater than one mm was 35.9% of all teeth analyzed from Shorter, 17.4% of Middle and 8.9% of Larger group at 1 mm apical to the FBC., Conclusions: When the distance from the CEJ to the FBC is augmented, thinner FAB thickness has to be expected in all teeth of the anterior maxilla. The prevalence to find a FAB thicker than one mm decreases as the distance from the FBC to the CEJ increases.
- Published
- 2019
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37. Emergence Angles of the Cementoenamel Junction in Natural Maxillary Anterior Teeth
- Author
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Je-Kang Du, Huey-Er Lee, Chau-Hsiang Wang, Hung-Yuan Li, and Ju-Hui Wu
- Subjects
Orthodontics ,Materials science ,Root surface ,business.industry ,medicine.medical_treatment ,Dentistry ,3d model ,Crown (dentistry) ,stomatognathic diseases ,Cementoenamel junction ,stomatognathic system ,Posterior teeth ,medicine ,Narrow range ,Maxillary central incisor ,business ,General Dentistry ,Anterior teeth - Abstract
Statement of the Problem: Fabrication of normal crown contour to maintain gingival health is difficult in the absence of emergence angle data. Purpose: The aim of this study was to measure the geometric values of the emergence angles on the cementoenamel junction (CEJ) for natural maxillary anterior teeth. Material and Methods: This study collected 148 natural permanent maxillary anterior teeth (74 central incisors, 59 lateral incisors, and 15 canines) with intact cervixes for this study. The teeth were scanned with a three-dimensional (3D) scanner to construct 3D models. This study measured the emergence angles of the cervical CEJ on the zenith of labial, palatal, mesial, and distal, for each tooth. Results: Measurements made on 148 maxillary anterior teeth showed the emergence angle to be within a narrow range from 11.30° to 15.26°, irrespective of the tooth location. There were no statistically significant differences between any two groups (p > 0.05). Conclusions: On the basis of measurements taken from natural teeth, we conclude that the emergence angles of the CEJ in natural maxillary anterior teeth should be 15° from the root surface. CLINICAL SIGNIFICANCE The information presented in this article may be useful in helping to create dental restorations with optional emergence angles over the CEJ in natural maxillary anterior teeth. Prior to the treatment the dentist should consider not only the fit of the crown, but also the emergence angles and contours of the soft tissues surrounding the involved teeth. (J Esthet Restor Dent 23:362–370, 2011)
- Published
- 2011
38. Surgical root repair of extensive invasive cervical resorption defects involving the cementoenamel junction: Two case reports
- Author
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BV Smitha, Anuja Swami, and Ritu Sharma
- Subjects
External root resorption ,business.industry ,root restorations ,Dentistry ,glass ionomer cement root repair ,invasive cervical resorption ,root repair ,lcsh:RK1-715 ,Cementoenamel junction ,Immunology and Microbiology (miscellaneous) ,Invasive cervical resorption ,lcsh:Dentistry ,Medicine ,Dentistry (miscellaneous) ,Oral Surgery ,Anatomy ,business - Abstract
Extensive invasive cervical resorption (ICR) defects involving the cementoenamel junction has a poor periodontal, restorative, and structural prognosis. However, some patients may insist upon surgical restorative repair of these lesions. Two such treated cases are reported with 15 and 12 month follow–up, respectively. In one case, glass ionomer cement, and in the other case, composite resin with fiber post, were used for restoration, after thorough surgical debridement. Both the patients were available for close follow-ups and maintained scrupulous oral hygiene. In both cases, the teeth had poor prognosis due to high chance of tooth fracture and possible continued periodontal breakdown with bone loss. However, at the above-stated follow-up periods, the teeth remained asymptomatic, periodontally stable, and structurally intact. This supports that a surgical restorative treatment, of the extensive ICR lesion, may result in short-term success and tooth retention.
- Published
- 2018
39. Cone beam computed tomography evaluation of distance from cementoenamel junction to alveolar crest before and after nonextraction orthodontic treatment
- Author
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José Valladares-Neto, Carlos Estrela, Luma Oliveira Castro, Iury Oliveira Castro, and Ana Helena Gonçalves de Alencar
- Subjects
Cone beam computed tomography ,Dentistry ,Orthodontics ,Malocclusion, Angle Class I ,Tooth Cervix ,Alveolar crest ,03 medical and health sciences ,0302 clinical medicine ,stomatognathic system ,Buccal Surface ,Alveolar Process ,Medicine ,Humans ,Maxillary central incisor ,Dental alveolus ,business.industry ,030206 dentistry ,Periodontium ,Original Articles ,Cone-Beam Computed Tomography ,Incisor ,Cementoenamel junction ,stomatognathic diseases ,Crest ,business ,030217 neurology & neurosurgery - Abstract
Objective: To evaluate the distance between the cementoenamel junction and the alveolar bone crest before and after orthodontic treatment using cone beam computed tomography (CBCT). Materials and Methods: The sample comprised 30 patients with Angle Class I malocclusion and mild to moderate crowding. The study database comprised dental CBCT scans obtained before and after orthodontic treatment. The distance between the cementoenamel junction to the bone crest of the buccal (n = 720) and lingual (n = 720) surfaces was measured in 24 teeth for each patient using a specific software tool (Xoran version 3.1.62). The Wilcoxon test was used for statistical analysis, and the level of significance was set at P < .05. Results: The distance between the cementoenamel junction and the bone crest increased in 822 (57%) of the 1440 surfaces after orthodontic treatment. The buccal surface of the lower central incisors had the greatest frequency of increased distance (75%), and the lingual surface of lateral incisors had the lowest (40%). The distance between the cementoenamel junction and the alveolar bone crest was greater than 2 mm (alveolar bone dehiscence) in 162 (11%) of the 1440 surfaces before orthodontic treatment and in 279 (19%) after treatment. Conclusions: The distance from the cementoenamel junction to the bone crest changed after orthodontic treatment; the distance was greater than 2 mm in 11% of the surfaces before treatment and in 19% after treatment.
- Published
- 2015
40. Influence of Local Factors on Cementoenamel Junction–Alveolar Bone Crest Distance in Primary Dentition
- Author
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Ivete Pomarico Ribeiro de Souza, Viviane Santos da Silva Pierro, and Ronir Raggio Luiz
- Subjects
Male ,Molar ,Cuspid ,Alveolar Bone Loss ,Dentistry ,Mandibular second molar ,stomatognathic system ,medicine ,Humans ,Odontometry ,Periodontal Pocket ,Tooth Root ,Tooth, Deciduous ,Radiography, Bitewing ,Dental alveolus ,Observer Variation ,Orthodontics ,Dentition ,business.industry ,General Medicine ,stomatognathic diseases ,Cementoenamel junction ,Dental arch ,medicine.anatomical_structure ,Child, Preschool ,Calipers ,Female ,Crest ,business - Abstract
Objective: This study illustrated the influence of local factors (dental biofilm, gingival bleeding, probing depth, proximal contact and proximal caries/inadequate restorations) on the cementoenamel junction(CEJ)-alveolar bone crest (ABC) distance in primary canines and molars of healthy children with complete primary dentition. Study Design: Two hundred and four patients have been examined clinically with regard to biofilm's presence, gingival status, probing depth, proximal contact and dental condition (carious lesions/restorations). Two bitewings of each patient were also taken. Eight dental surfaces (second molars mesial, first molars mesial and distal, and canines distal) could be analyzed per bitewing and the CEJ-ABC distance was measured using a digimatic caliper. Statistical analyses were controlled by dental arch, tooth type and surface. Mann-Whitney test was used to verify the association between CEJ-ABC distance and local factors. Results: After stratifying the data according to those influencing factors, the only local factor associated with increased CEJ-ABC distances in most of the different analyzed dental surfaces was the increased probing depth (>2mm), although only two dental surfaces showed statistical significance(p
- Published
- 2009
41. Emergence Angles of the Cementoenamel Junction in Natural Maxillary Anterior Teeth
- Author
-
DU, JE-KANG, LI, HUNG-YUAN, WU, JU-HUI, LEE, HUEY-ER, and WANG, CHAU-HSIANG
- Published
- 2011
- Full Text
- View/download PDF
42. Cementoenamel Junction: Microscopic Analysis and External Cervical Resorption
- Author
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Neuvald, Lilian and Consolaro, Alberto
- Published
- 2000
- Full Text
- View/download PDF
43. The Accuracy of the Cementoenamel Junction Identification on Periapical Films.
- Author
-
Brezniak, Naphtali, Goren, Shay, Zoizner, Ronen, Shochat, Tzipi, Dinbar, Ariel, Wasserstein, Atalia, and Heller, Moshe
- Subjects
TOOTH cervix ,PERIAPICAL diseases ,TOOTH root diseases ,ORTHODONTICS ,DENTAL crowns ,MAXILLARY expansion ,THERAPEUTICS - Abstract
In the study of orthodontically induced inflammatory root resorption, many researchers use the cementoenamel junction (CEJ) as a bisecting reference point to measure the amount of root shortening. The accuracy of the identification of the CEJ point might affect the conclusions of those studies. This study aims to find the effects of angular changes between the tooth and the film on the validity and reproducibility of identifying three different CEJ points, ie, the most apical CEJ point between the crown and the root, the most mesial CEJ point, and the most distal CEJ point. An extracted maxillary central incisor was placed in a special jig and radiographed at four different tooth to film angulations. Eight examiners were asked to identify the buccal and palatal CEJ, whereas six examiners were asked to identify the mesial and distal CEJ points, all on a computer monitor. The distances between the identified points and the apex were computed and compared with the actual ones. The angular changes between the tooth and the film did have a statistically significant effect on the identification of some of these CEJ points. The difference was significant on the identification of the buccal and palatal points but not on the mesial and the distal ones. [ABSTRACT FROM AUTHOR]
- Published
- 2004
44. Angulation, contact point, and cementoenamel junction distance of impacted mandibular third molars referred for extraction are probably associated with distal caries in the second molar
- Author
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Romina Brignardello-Petersen
- Subjects
Molar ,Mandibular second molar ,Orthodontics ,Cementoenamel junction ,business.industry ,Medicine ,Distal caries ,Dentistry ,business ,General Dentistry ,Mandibular first molar - Published
- 2017
45. Sex-related differences in the distance of the mental foramen to the cementoenamel junction in adults: a study using cone beam computed tomography
- Author
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Emanouela D, Carlson, Andrew, Stubbs, Sangeetha, Chandrasekaran, Beatriz, Robles, Richard, Kolanda, Anita, Gohel, and Ramzi, Sarkis
- Subjects
Adult ,Male ,Humans ,Bicuspid ,Female ,Mandible ,Cone-Beam Computed Tomography ,Tooth Cervix ,Retrospective Studies - Abstract
Injury to the contents of the mental foramen (MF) can be minimized by using cone beam computed tomography (CBCT) to determine the exact location of the MF prior to surgical procedures. In this retrospective study, variations in the vertical position of the MF between adult men and women older than 18 years were investigated using CBCT. The distance between the superior border of the MF and the most apical aspect of the cementoenamel junction (CEJ) of the mandibular second premolar was measured. Among the randomly accessed CBCT records of 200 patients, 176 MF-CEJ measurements met the inclusion criteria. There was a statistically significant difference (P0.001) between the sexes in the location of the MF. The distance in women was shorter by an average of 2.00 mm, irrespective of the side of the mandible. Additionally, a within-sex asymmetry between right and left sides was observed; the asymmetry was significantly greater in men than in women (P0.05). Clinicians should be cognizant of the influence of the patient's sex on the vertical position of the MF and the presence of asymmetry in the position of the MF between the right and left sides of the mandible within the sex groups.
- Published
- 2019
46. Emergence Angles of the Cementoenamel Junction in Natural Maxillary Anterior Teeth
- Author
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KOIS, JOHN C.
- Published
- 2011
- Full Text
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47. Morphological analysis of anterior permanent dentition in a Chinese population using cone-beam computed tomography
- Author
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Yu Chen, Yu Dai, Zhengbin Yan, Yuehua You, Bin Wu, and Bingtai Lu
- Subjects
Cementoenamel junction curvature ,Cone-beam computed tomography ,Furcation ,Root canal ,Root length ,Specialties of internal medicine ,RC581-951 - Abstract
Abstract Purpose Morphological analysis of permanent anterior dentition is essential for achieving an ideal treatment outcome and avoiding unnecessary failure. This study aimed to analyze the morphologies of anterior teeth in the Chinese population in depth. Methods In this retrospective study, 4309 anterior teeth from 401 Chinese patients were investigated using cone-beam computed tomography (CBCT) from 2019–2021. We summarized the morphological characteristics of the anterior teeth in terms of the root length, cementoenamel junction curvature (CEJ-C), root furcation and canal variations. Results We found that the root lengths of the maxillary anterior incisors were similar (13.3 mm), while the root lengths of the mandibular central (12.2 mm) and lateral incisors (13.4 mm) varied significantly (p
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- 2023
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48. Role of cementoenamel junction on the radicular penetration of 30% hydrogen peroxide during intracoronal bleaching <em>in vitro</em>.
- Author
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Koulaouzidou, E., Lambirianidis, T., Beltes, P., Lyroudia, K., and Papadopoulos, C.
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TOOTH whitening ,TEETH ,HYDROGEN peroxide ,TOOTH roots ,RESORPTION (Physiology) ,CEMENTUM ,ENAMEL & enameling ,BICUSPIDS ,ORTHODONTICS - Abstract
Intracoronal bleaching of nonvital teeth with 30% hydrogen peroxide is occasionally associated with external cervical root resorption. The exact mechanism by which bleaching induced root resorption occurs is not yet fully understood. The relationship of cementum to the enamel at the cementoenamel junction may have clinical significance. Seventeen single rooted human mandibular premolars extracted atraumatically for orthodontic reasons were used. The radicular hydrogen peroxide penetration in each tooth was measured in vitro by an indirect colorimetric method. Thereafter, the teeth were examined with a scanning electron microscope to determine the type of the cementoenamel junction. It was found that the radicular penetration of 30% hydrogen peroxide was related to the type of cementoenamel junction. [ABSTRACT FROM AUTHOR]
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- 1996
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49. Angulation, contact point, and cementoenamel junction distance of impacted mandibular third molars referred for extraction are probably associated with distal caries in the second molar.
- Author
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Brignardello-Petersen R
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- 2017
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50. Surgical root repair of extensive invasive cervical resorption defects involving the cementoenamel junction: Two case reports
- Author
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Swami, Anuja, primary, Sharma, Ritu, additional, and Smitha, BV, additional
- Published
- 2018
- Full Text
- View/download PDF
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