27 results on '"Ersan N"'
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2. Current situation of cone beam computed tomography in dentomaxillofacial radiology education
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Ersan, N., Fisekcioglu, E., Dolekoglu, S., Ilguy, M., Ersan, N., Fisekcioglu, E., Dolekoglu, S., Ilguy, M., and Yeditepe Üniversitesi
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Radiation protection ,stomatognathic system ,education ,CBCT ,Implant ,Dental radiology curriculum ,respiratory system ,Competences ,urologic and male genital diseases ,equipment and supplies - Abstract
Little is known regarding to what extent Cone Beam Computed Tomography (CBCT) has been incorporated into the curriculum of dental schools or to which degree the students are being exposed to it. The objectives of this study were to evaluate the current situation of CBCT in Dentomaxillofacial Radiology (DMFR) education and review the established competences on dentists and DMFR residents on CBCT in Turkey, Europe and United States. In order to define the situation in Turkey, DMFR educators were asked to complete a form, which consisted of 11 questions on the didactic and practical teaching of CBCT technique to undergraduate and postgraduate students. They were also asked to indicate their opinion about expected level of competence of dental students on CBCT upon graduation. Besides, competences that were determined for the undergraduate and postgraduate CBCT education in Turkey, Europe and United States were discussed. Fifty-four educators from 20 dental schools in Turkey responded the survey. Sixteen (80%) dental schools presently had a CBCT machine, and most of them had courses on higher-level use of CBCT for postgraduate students. Twenty-nine educators (53.7%) thought that a dental student should be familiar with the CBCT technique, whereas only 2 (3.7%) of them thought that they should be competent in using and interpreting CBCT upon graduation. A large number of dental schools in Turkey had CBCT machine. Although, the competences regarding CBCT were specifically determined in Turkey, there is a need for updating national and international competences in order to define the responsibilities and limitations of the dental practitioners and DMFR specialists. © 2017, Scientific Publishers of India. All rights reserved.
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- 2017
3. Prevalence and morphometric features of fossa navicularis on cone beam computed tomography in Turkish population
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Ersan, N., primary
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- 2017
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4. Cone-beam computed tomography findings of zoledronic acid and teriparatide administration
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Ersan, N, Sinanoglu, A, Ilguy, D, Ersan, N, Sinanoglu, A, Ilguy, D, and Yeditepe Üniversitesi
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…
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- 2014
5. The Concentration of Cd Metals on Seawater, Sediment, and Green Mussel in Tambak Lorok Waters and Morosari Waters
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Ersan Noviansyah, Djamar Tumpal Floranthus Lumban Batu, and Isdradjad Setyobudiandi
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cadmium ,green mussels ,morosari ,seawater ,sediments ,tambak lorok ,Agriculture ,Agriculture (General) ,S1-972 - Abstract
Cadmium metal is dangerous for green mussel organisms because it can interfere with fertility. Green mussels are organisms widely distributed, can survive in poor environments, and sedentary organisms. Green shellfish is a filter feeder and is used as a bioindicator to monitor the concentration of Cd metal in the waters. The research objective was to measure the concentration of Cd metal in sea water, sediment, and green mussel meat in the waters of Tambak Lorok and Morosari. The Cd metal contents of seawater, sediments, and green mussels were measured using Atomic Absorption Spectrophotometer. The results showed that Cd metal concentrations in seawater in May, July, and August 2018 in Tambak Lorok and Morosari waters were below the detection limit (0.001mg/L); 0.002 mg/L; and 0.002 mg/L, respectively. The concentrations of cadmium in sediment in May, July, and August in Tambak Lorok waters were below the detection limit (0.004 mg/kg); 0.0023 mg/kg; and 0.0021 mg/kg, respectively, and in Morosari waters were below the detection limit (0.004 mg/kg); 0.002 mg/kg; and 0.0114 mg/kg, respectively. Cd metal concentrations in green mussel meats in May, July, and August in Tambak Lorok waters were below the detection limit (0.01mg/kg); 0.0060; and 0.1277 mg/kg, respectively, and in Morosari water were below the detection limit (0.01mg/kg); 0.0067 mg/kg; and 0.0493 mg/kg, respectively. Cd metal concentrations in sea water and green mussels in the waters of Tambak Lorok and Morosari were below the quality standard and the concentrations of Cd metal in seawater, sediments, and green mussel meat in the waters of Tambak Lorok and Morosari were not significantly different.
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- 2021
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6. Teriparatide and the treatment of bisphosphonate-related osteonecrosis of the jaw: a rat model
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Ersan, N, primary, van Ruijven, L J, additional, Bronckers, A L J J, additional, Olgaç, V, additional, İlgüy, D, additional, and Everts, V, additional
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- 2014
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7. Prevalence and morphometric features of fossa navicularis on cone beam computed tomography in Turkish population
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Nilüfer Ersan, Ersan, N., and Yeditepe Üniversitesi
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0301 basic medicine ,Turkish population ,Cone beam computed tomography ,Histology ,business.industry ,Morphometry ,Radiography ,Significant difference ,Fossa navicularis ,Anatomy ,Radioanatomy ,03 medical and health sciences ,Age groups ,Male patient ,Female patient ,Medicine ,Cranium ,030101 anatomy & morphology ,Fossa navicularis magna ,business - Abstract
Background: The objective of this study is to determine the prevalence and morphometric features of fossa navicularis, a close radiographic anatomic variation of canalis basilaris medianus of the basiocciput, in a Turkish population, using cone beam computed tomography (CBCT). Materials and methods: The study group consisted of 723 patients (female: 420, male: 303) having CBCT scans. The patients had no syndromes, history of neurological diseases or surgery in the area of interest. On the images that revealed a fossa navicularis, the depth, length, and width measurements were performed, and were compared to the age and gender of the patients. The shape and number of fossa navicularis were also recorded. Results: Fossa navicularis was identified in 48 (6.6%) patients. Among these patients, 19 were female (4.5% of all female patients), whereas 29 were male (9.6% of all male patients), and their age ranged between 10 and 68 years (mean age: 34.0 ± 18.7). No significant difference was found between genders and age groups in terms of depth, length, and width measurements (p > 0.05). In 39 (5.4%) patients, fossa navicularis presented oval in shape. Conclusions: Even though the prevalence of fossa navicularis was found to be higher than previously reported, it still seems to be rare. Anatomical structure of the fossa navicularis can be studied effectively on CBCT images. © Copyright 2017 Via Medica.
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- 2017
8. Perceived sources and levels of stress, general self-efficacy and coping strategies in clinical dental students
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Dilhan İlgüy, Nilüfer Ersan, Inci Oktay, Erdoğan Fişekçioğlu, Semanur Dölekoğlu, Oktay, İnci, Ersan, N., Fişekçioğlu, E., Dölekoğlu, S., Oktay, İ., İlgüy, D., and Yeditepe Üniversitesi
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Adult ,Male ,Coping (psychology) ,Turkish ,education ,Students, Dental ,Perceived Stress Scale ,050109 social psychology ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Perceived Stress ,Adaptation, Psychological ,Coping Strategies ,medicine ,Humans ,0501 psychology and cognitive sciences ,Applied Psychology ,Self-efficacy ,Academic year ,business.industry ,05 social sciences ,Stressor ,Undergraduate Education ,Workload ,030206 dentistry ,medicine.disease ,Clinical Dental Students ,language.human_language ,Self Efficacy ,Substance abuse ,Psychiatry and Mental health ,Clinical Psychology ,Self-Efficacy ,language ,Female ,business ,Stress, Psychological ,Clinical psychology - Abstract
Ersan, Nilufer/0000-0001-7039-7099 WOS:000413923600006 PubMed: 28161969 The aims of this study were to identify sources of stress among clinical students and to evaluate the students' perceived levels of stress, general self-efficacy and effective coping strategies in a private dental school environment. The study group consisted of 130 undergraduate clinical dental students in a Turkish private dental school, during the academic year 2014-2015. The students were surveyed using modified version of the dental environment stress (DES) survey, the perceived stress scale, the general self-efficacy scale (G-SES) and the brief coping scale. Age, sex, year of study, history of psychiatric treatment and factors that affected the choice of dentistry were also recorded. Final year and female clinical dental students, who were found to be the most stressful students, had moderate to high perceived stress scores. Total and Faculty and administration' related DES scores increased with the year of study. Stressors related to Workload' and Clinical training' affected females more than males. G-SES scores were higher in male students and students, who had no history of psychiatric treatment. The most and the least common coping strategies were Planning' and Substance abuse', respectively. Religion' was found to be one of the main coping strategies. Stress factors affecting Turkish clinical dental students studying at private dental school differed from the previously reported stress factors affecting students studying at a governmental dental school. Advanced year and female students experienced more stress than the other students.
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- 2017
9. Measurements of the Foramen Magnum and Mandible in Relation to Sex Using CBCT
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Erdoğan Fişekçioğlu, Nilüfer Ersan, Semanur Dölekoğlu, Mehmet İlgüy, Dilhan İlgüy, Ilgüy, D., Ilgüy, M., Ersan, N., Dölekoglu, S., Fişekçioglu, E., and Yeditepe Üniversitesi
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Adult ,Male ,Cone beam computed tomography ,Adolescent ,Dentistry ,Mandible ,Biology ,Pathology and Forensic Medicine ,Sexual dimorphism ,Young Adult ,Imaging, Three-Dimensional ,stomatognathic system ,Genetics ,medicine ,Humans ,Gonial angle ,Foramen Magnum ,Aged ,Retrospective Studies ,Aged, 80 and over ,Foramen magnum ,Measurement ,Adult patients ,business.industry ,Cone-beam computed tomography ,Discriminant Analysis ,Forensic anthropology ,Cone-Beam Computed Tomography ,Middle Aged ,Sex Determination by Skeleton ,medicine.anatomical_structure ,Reference sample ,Forensic Anthropology ,Female ,Forensic science ,business - Abstract
The purpose of this study was to evaluate pre-existing CBCT images of a large sample of adult females and males to provide data on foramen magnum and mandibular measures of sexual dimorphism for use as a reference sample in cases of establishing identity in unknown fragmentary skulls. The study group consisted of 161 adult patients. 3D images of the patients were assessed retrospectively. FM measurements were obtained from reformatted axial sections. Six mandibular measurements were taken. According to the results, the study identified four mandibular measurements as final predictors of sex which are as follows: the gonial angle (G-angle) and ramus length (Ramus-L), gonion-gnathion length (G-G-L) and bigonial breadth (BG-Br). It was found that the cross-validated grouped overall predictive accuracy was 83.2% for FM and mandible measurements. It could correctly identify males in 77.3% and females in 87.4% of the cases. To assess sexual dimorphism, the gonial angle and ramus, gonion-gnathion lengths, and bigonial breadth of the mandible and sagittal diameter of the FM may be used on CBCT images. © 2014 American Academy of Forensic Sciences.
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- 2014
10. In Vitro Detection of Dental Root Fractures with Cone Beam Computed Tomography (CBCT)
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Dilhan İlgüy, Mehmet İlgüy, Erdoğan Fişekçioğlu, Semanur Dölekoğlu, Nilüfer Ersan, Fisekcioglu, E., Dolekoglu, S., Ilguy, M., Ersan, N., Ilguy, D., and Yeditepe Üniversitesi
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Orthodontics ,medicine.medical_specialty ,Cone beam computed tomography ,medicine.diagnostic_test ,business.industry ,Cone-beam computed tomography ,Tooth Fracture ,Computed tomography ,Cone-Beam Computed Tomography ,Surgery ,In Vitro ,Tooth Fractures ,stomatognathic diseases ,Head & Neck Imaging ,stomatognathic system ,In vitro ,medicine ,Radiology, Nuclear Medicine and imaging ,business ,Tooth fractures - Abstract
Background: Since the diagnosis of non-displaced longitudinal fractures present difficulties for the dentist, three-dimensional evaluation is necessary. Objectives: The aim of this study is to demonstrate the accuracy of cone beam computed tomography (CBCT) in detecting dental root fractures in vitro. Materials and Methods: An in vitro model consisting of 210 recently extracted human mandibular teeth was used. Root fractures were created by mechanical force. The teeth were placed randomly in the empty dental alveoli of a dry human mandible and 15 different dental arcs were created. Images were taken with a unit Iluma ultra cone-beam CT scanner (Imtec Corporation, Germany). Three dental radiologists separately evaluated the images. Results: According to the fracture types and fracture presence, there was an overall statistically significant agreement between the key and readings. Kappa values for intra observer agreement ranged between 0.705 and 0.804 indicating that each observer gave acceptable ratings for the type and presence of fractures. Conclusions: Detailed information about root fractures may be obtained using CBCT. © 2014, Tehran University of Medical Sciences and Iranian Society of Radiology; Published by Kowsar Corp.
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- 2014
11. Articular Eminence Inclination, Height, and Condyle Morphology on Cone Beam Computed Tomography
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Erdoğan Fişekçioğlu, Dilhan İlgüy, Semanur Dölekoğlu, Mehmet İlgüy, Nilüfer Ersan, Ilgüy, D., Ilgüy, M., Fişekçioglu, E., Dölekoglu, S., Ersan, N., and Yeditepe Üniversitesi
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Adult ,Male ,Cone beam computed tomography ,Morphology (linguistics) ,Adolescent ,Fossa ,Article Subject ,lcsh:Medicine ,Osteoarthritis ,lcsh:Technology ,General Biochemistry, Genetics and Molecular Biology ,Condyle ,Sex Factors ,medicine ,Humans ,lcsh:Science ,Aged ,General Environmental Science ,Aged, 80 and over ,Temporomandibular Joint ,biology ,business.industry ,lcsh:T ,lcsh:R ,General Medicine ,Anatomy ,Cone-Beam Computed Tomography ,Middle Aged ,medicine.disease ,biology.organism_classification ,Sagittal plane ,Temporomandibular joint ,medicine.anatomical_structure ,Coronal plane ,Female ,lcsh:Q ,business ,Research Article - Abstract
Aim. The aim of the present study was to examine the relationship between articular eminence inclination, height, and thickness of the roof of the glenoid fossa (RGF) according to age and gender and to assess condyle morphology including incidental findings of osseous characteristics associated with osteoarthritis (OA) of the temporomandibular joint (TMJ) using cone beam computed tomography (CBCT).Materials and Methods. CBCT images of 105 patients were evaluated retrospectively. For articular eminence inclination and height, axial views on which the condylar processes were seen with their widest mediolateral extent being used as a reference view for secondary reconstruction. Condyle morphology was categorized both in the sagittal and coronal plane.Results. The mean values of eminence inclination and height of males were higher than those of females (P<0.05). There were significant differences in the RGF thickness in relation to sagittal condyle morphology. Among the group of OA, the mean value of the RGF thickness for “OA-osteophyte” group was the highest (1.59 mm), whereas the lowest RGF values were seen in the “OA-flattening.”Conclusion. The sagittal osteoarthritic changes may have an effect on RGF thickness by mechanical stimulation and changed stress distribution. Gender has a significant effect on eminence height (Eh) and inclination.
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- 2014
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12. Teriparatide and the treatment of bisphosphonate-related osteonecrosis of the jaw: a rat model
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Antonius L.J.J. Bronckers, Vakur Olgaç, Nilüfer Ersan, Dilhan İlgüy, L.J. van Ruijven, Vincent Everts, Oral Cell Biology, Ersan, N., Van Ruijven, L.J., Bronckers, A.L.J.J., Olgaç, V., Ilgüy, D., Everts, V., Yeditepe Üniversitesi, and Orale Celbiologie (ORM, ACTA)
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medicine.medical_treatment ,Osteoclasts ,Apoptosis ,Cell Count ,Zoledronic Acid ,Rats, Sprague-Dawley ,Random Allocation ,Bone Density ,Bone Marrow ,Osteogenesis ,Teriparatide ,Tooth Socket ,Tartrate-resistant acid phosphatase ,Bone mineral ,Bone Density Conservation Agents ,Diphosphonates ,Bisphosphonate-associated osteonecrosis of the jaw ,Imidazoles ,General Medicine ,Isoenzymes ,Bisphosphonate-Associated Osteonecrosis of the Jaw ,Female ,Injections, Intraperitoneal ,medicine.drug ,medicine.medical_specialty ,Injections, Subcutaneous ,Rat model ,Acid Phosphatase ,Urology ,Microcomputed tomography ,medicine ,Alveolar Process ,Cell Adhesion ,Animals ,Radiology, Nuclear Medicine and imaging ,General Dentistry ,Zoledronic acid ,business.industry ,Tartrate-Resistant Acid Phosphatase ,Research ,X-Ray Microtomography ,Bisphosphonate ,medicine.disease ,Molar ,Surgery ,Rats ,Disease Models, Animal ,Otorhinolaryngology ,Tooth Extraction ,Osteonecrosis of the jaw ,business ,Biomarkers - Abstract
Objectives:The objectives of this study were to establish a bisphosphonate-related osteonecrosis of the jaw (BRONJ) rat model and to analyse the effects of teriparatide (TP) on this model.Methods:Sprague-Dawley rats were divided into three groups: I—zoledronic acid (ZA, n = 10); II—ZA and teriparatide (ZA + TP, n = 10); III—control (n = 10). Osteonecrosis was induced by administering zoledronic acid to groups ZA and ZA + TP. A week after the injections, rats underwent extraction of the first left mandibular molar. Following a four week period, TP was administered to the ZA + TP group for 28 days. Upon killing, extraction sockets were examined clinically, radiologically and histopathologically.Results:Clinical examination revealed necrotic bone exposure in none of the animals. MicroCT (µCT) examination showed that bone mineral density of the newly formed bone in the extraction socket was lower in the ZA group than in the ZA + TP group (p < 0.05). Histopathological examination revealed that only the ZA and ZA + TP groups developed osteonecrosis, and the osteonecrotic bone area in the ZA group was larger than that in the ZA + TP group (p < 0.05). Tartrate-resistant acid phosphatase (TRAcP) enzyme histochemistry revealed that the number of detached and large osteoclasts were higher in the ZA group than in other groups, whereas the number of apoptotic osteoclasts in both ZA and ZA + TP groups were higher than in the control group (p < 0.05).Conclusions:Our data indicate that bisphosphonate-related osteonecrosis of the jaw model used in the present study is an attractive model to investigate treatment modalities and that TP might be an effective treatment in BRONJ.
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- 2014
13. Assessment of root canal treatment outcomes performed by Turkish dental students: Results after two years
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Mehmet İlgüy, Nilüfer Ersan, Jale Tanalp, Erdoğan Fişekçioğlu, Semanur Dölekoğlu, Dilhan İlgüy, Ilgüy, D., Ilgüy, M., Fişekçioglu, E., Ersan, N., Tanalp, J., Dölekoglu, S., and Yeditepe Üniversitesi
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Adult ,Male ,Turkey ,Root canal ,Radiography ,medicine.medical_treatment ,Treatment outcome ,University faculty ,Students, Dental ,Dentistry ,Endodontics ,Time frame ,Outcome Assessment, Health Care ,medicine ,Root filling ,Humans ,Tooth Root ,Dental Restoration, Permanent ,business.industry ,Periapical radiography ,General Medicine ,Middle Aged ,Root Canal Therapy ,medicine.anatomical_structure ,Equipment Failure ,Female ,Dental students ,Clinical Competence ,Dental Pulp Cavity ,business ,Dental restoration ,Follow-Up Studies - Abstract
The aim of this study was to evaluate radiographically the periapical status and technical standard of root canal therapies performed by a group of undergraduate dental students in Turkey two years following completion of the treatments. A random sample of 264 patients who received root canal treatment from undergraduate students at the Yeditepe University Faculty of Dentistry in 2009 were recalled after two years. The study sample consisted of 319 root-filled teeth in 158 dental patients (females=97, males=61) who presented to the student clinics during that time frame. For each root-filled tooth, two periapical radiographs were examined to identify the periapical status, one showing pre-treatment and the other showing post-treatment status. The quality of endodontic treatment was examined according to the distance between the end of root filling and radiographic apex and the density of the obturation according to presence of voids within the root filling material. This examination found that 54.2 percent of roots had fillings of acceptable length, while 37.3 percent were short, 7.8 percent were overfilled, and 0.6 percent was unfilled; 2.5 percent of the teeth were observed with broken root canal instruments. After two years, PAI scores of teeth with acceptable length of root canal filling (0-2 mm from the radiographic apex) were found to be lower than those of the overfilling and short filling cases (>2mm) (p
14. Evaluation of Minimum Axial Airway Area and Airway Volume in Orthognathic Surgery Patients: A Retrospective Study.
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Yey Özkeskin SZ, Ersan N, Öztürk Muhtar M, Cansiz E, and Ramazanoğlu M
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The aim of this study was to compare preoperative and postoperative linear, planar, and volumetric measurements in the pharyngeal airway in orthognathic surgery patients. Preoperative and postoperative cone beam computed tomography (CBCT) images of 60 patients, who underwent maxillary advancement with mandibular setback (Group I, n=25) and bimaxillary advancement (Group II, n=35), were compared. The airway was divided into 3 regions as nasopharynx, oropharynx, and hypopharynx. Linear and planar measurements were made on the reference sections of each region. The minimum axial airway area, the volume of 3 regions, and total airway volume were also measured. Regarding the linear, planar, and volumetric measurements, while there was a statistically significant increase in the measurements for all three regions in Group II, in Group I only the measurements in the nasopharyngeal region demonstrated a statistically significant increase postoperatively (P<0.05). There was an increase in minimum axial airway areas in both groups; however, it was only statistically significant in Group II (P<0.05). There was a statistically significant increase in total airway volumes in both groups (P<0.05). A positive and good correlation was found between the percent increase in the minimum axial area and the percent increase in the total volume (P<0.05). While bimaxillary advancement surgery results in a significant increase in the pharyngeal airway, mandibular setback with maxillary advancement caused an increase in the total airway. Changes that may occur in the airway should be considered while planning orthognathic surgery., Competing Interests: The authors report no conflicts of interest., (Copyright © 2024 by Mutaz B. Habal, MD.)
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- 2024
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15. Evaluation of mandibular condyle position in Class III patients after bimaxillary orthognathic surgery: A cone-beam computed tomography study.
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Küçükçakır O, Ersan N, Arslan YZ, and Cansız E
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Objective: This retrospective study evaluated the mandibular condyle position before and after bimaxillary orthognathic surgery performed with the mandibular condyle positioned manually in patients with mandibular prognathism using cone-beam computed tomography., Methods: Overall, 88 mandibular condyles from 44 adult patients (20 female and 24 male) diagnosed with mandibular prognathism due to skeletal Class III malocclusion who underwent bilateral sagittal split ramus osteotomy (BSSRO) and Le Fort I performed using the manual condyle positioning method were included. Cone-beam computed tomography images obtained 1-2 weeks before (T0) and approximately 6 months after (T1) surgery were analyzed in three planes using 3D Slicer software. Statistical significance was set at P < 0.05 level., Results: Significant inward rotation of the left mandibular condyle and significant outward rotation of the right mandibular condyle were observed in the axial and coronal planes ( P < 0.05). The positions of the right and left condyles in the sagittal plane and the distance between the most medial points of the condyles in the coronal plane did not differ significantly ( P > 0.05)., Conclusions: While the change in the sagittal plane can be maintained as before surgery with manual positioning during the BSSRO procedure, significant inward and outward rotation was observed in the axial and coronal planes, respectively, even in the absence of concomitant temporomandibular joint disorder before or after the operation. Further long-term studies are needed to correlate these findings with possible clinical consequences.
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- 2024
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16. Evaluation of mandibular cortical and trabecular radiomorphometry in familial Mediterranean fever patients.
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Ersan N and Özel B
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- Humans, Retrospective Studies, Radiography, Panoramic methods, Colchicine therapeutic use, Bone Density, Familial Mediterranean Fever diagnostic imaging
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Objective: The objective of this retrospective study was to evaluate the mandibular cortical and trabecular morphology and microarchitecture of patients with familial Mediterranean fever (FMF) and compare them to those of healthy individuals by examining radiomorphometric indices on panoramic radiographs., Study Design: We examined a group of 56 FMF patients aged 5 to 71 years and an age- and sex-matched control group of individuals with no systemic diseases. We classified the FMF and control groups according to age and sex and the FMF group according to colchicine use. We evaluated the quantitative radiomorphometic indices of gonial index, antegonial index, molar cortical thickness, mental index, panoramic mandibular index, and lacunarity, and the qualitative mandibular cortical index on all panoramic radiographs and performed between and within group analysis., Results: Mean gonial index, antegonial index, and molar cortical thickness values of the FMF group were significantly smaller than those of the control group. Significantly fewer patients in the FMF group were classified as mandibular cortical index type 1 compared to the control group. There were no significant differences in quantitative index values according to colchicine use in the FMF group or regarding the categorical parameters of age, sex, and mandibular cortical index classification., Conclusions: Radiomorphometric values of the mandibular basal cortex posterior to the mental foramen differ significantly in FMF patients compared to healthy counterparts. Dentists should note mandibular morphologic changes indicative of low bone density when examining panoramic images of patients with this disease., Competing Interests: Declaration of Interest None., (Copyright © 2023 Elsevier Inc. All rights reserved.)
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- 2023
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17. Cord blood anti-Müllerian hormone levels are higher in female newborns from women with polycystic ovary syndrome (PCOS) when compared to non-PCOS controls, irrespective of body mass index; a prospective case-control study.
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Baydemir ŞK, Sukur YE, Ersan N, Dogan O, and Atabekoglu CS
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- Pregnancy, Female, Humans, Infant, Newborn, Case-Control Studies, Body Mass Index, Fetal Blood, Anti-Mullerian Hormone, Polycystic Ovary Syndrome complications, Polycystic Ovary Syndrome epidemiology
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Objective: To compare cord-blood anti-Müllerian hormone levels between female newborns from women with and without polycystic ovary syndrome., Methods: A prospective case-control study was conducted in Ankara University School of Medicine, Department of Obstetrics and Gynecology between June 2020 and January 2021. In total, 408 women gave birth to a female during the study period. Of those, 45 had a polycystic ovary syndrome-like history. We did not find the preconceptional history of 16 women. Two women were excluded due to other endocrine disorders. The polycystic ovary syndrome group consisted of 27 women with polycystic ovary syndrome that gave birth to a female newborn during the study period and the non-polycystic ovary syndrome control group consisted of 33 women who had regular cycles prior to pregnancy, were never diagnosed with polycystic ovary syndrome, and gave birth to female newborns. The primary outcome measure was the cord-blood anti-Müllerian hormone levels., Results: The median cord-blood anti-Müllerian hormone levels of female newborns from polycystic ovary syndrome patients were significantly higher than those in the non-polycystic ovary syndrome group (0.33ng/ml vs. 0.12ng/ml, respectively; p<0.001). In addition, cord blood anti-Müllerian hormone levels were significantly higher in both obese and non-obese polycystic ovary syndrome patients when compared to body-mass-index-matched non- polycystic ovary syndrome patients (0.37ng/ml vs. 0.06ng/ml, respectively; p=0.013 and 0.30ng/ml vs. 0.11 ng/ml, respectively; p=0.003)., Conclusions: The cord blood anti-Müllerian hormone levels were higher in female newborns of women with polycystic ovary syndrome when compared to non-polycystic ovary syndrome controls. The effect of polycystic ovary syndrome seems to be greater than body mass index on cord blood anti-Müllerian hormone levels.
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- 2023
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18. Proximity of healthy posterior teeth to the maxillary sinus floor in relation to mucosal thickening: a CBCT study.
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Aguori EAB, Ersan N, Dölekoğlu ZS, and Ilgüy D
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- Humans, Young Adult, Adult, Middle Aged, Aged, Maxillary Sinus diagnostic imaging, Tooth Root, Cone-Beam Computed Tomography methods, Sinus Floor Augmentation, Spiral Cone-Beam Computed Tomography
- Abstract
Objectives: To evaluate the relationship between proximity of the root apices of healthy maxillary posterior teeth to the maxillary sinus floor (MSF) and mucosal thickening (MT) of the MSF using cone beam computed tomography (CBCT)., Methods: Eighty-four CBCT images obtained from the patients, aged between 20 and 70 years with healthy and fully dentate maxillary posterior sextants, were included. The anatomical relationship between root apices of maxillary posterior teeth and MSF, was evaluated: (Type 1: no contact, Type 2: at least one root apex in contact, Type 3: at least one root apex protruding into MSF). Besides, MT of the MSF was measured from the thickest region. The patients were categorized into two groups based on the absence (≤ 2 mm) or the presence (2 < mm) of MT. Statistical significance was accepted at p < 0.05., Results: Intraexaminer consistency demonstrated an excellent agreement (p < 0.05). The prevalence of Type 1, 2, and 3 proximity were found as 26 (15.5%), 61 (36.3%), and 81 (48.2%); respectively. Overall, 62 (36.9%) maxillary sinuses demonstrated MT (2 < mm, mean: 8.6 ± 7.5 mm). The prevalence and mean values of MT (2 < mm) were not found to be statistically significantly different in terms of sex and proximity types (p > 0.05). Logistic regression analysis results were not found to be statistically significant (p > 0.05)., Conclusion: The proximity of healthy maxillary posterior teeth to the MSF was not found to be a contributing factor for the MT of the MSF. Further studies with larger samples, taking the other factors causing MT into consideration, are needed., (© 2022. The Author(s) under exclusive licence to Japanese Society for Oral and Maxillofacial Radiology.)
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- 2023
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19. Fractal dimension analysis of different mandibular regions in familial Mediterranean fever patients: A cross-sectional retrospective study.
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Ersan N and Özel B
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- Humans, Child, Adolescent, Young Adult, Adult, Middle Aged, Aged, Retrospective Studies, Cross-Sectional Studies, Fractals, Colchicine therapeutic use, Familial Mediterranean Fever diagnostic imaging
- Abstract
Familial Mediterranean fever (FMF) is a genetic condition that may cause loss of bone mineral density (BMD) due to chronic inflammation. Previously, fractal dimension (FD) analysis values of mandibular cortical bone were shown to be lower in osteoporosis. Therefore, FD might be considered as an auxiliary tool to refer patients for dual-energy x-ray absorptiometry (DXA), which is the gold standard for BMD measurement. The purpose of this cross-sectional retrospective study was to evaluate trabecular and cortical microarchitecture of the mandible with FD analysis on panoramic radiographs in a subpopulation of FMF. Also, the effect of colchicine use was investigated. Forty-three FMF patients, aged between 10.8 and 71.2 years, and age- and gender-matched control group consisting of patients, who had no systemic diseases, were included. Demographic information such as age and gender, and colchicine use were recorded. In terms of age, the patients were classified as <30 and 30< years. On each panoramic radiographs five regions of interest were selected on the mandible as: 1- premolar, 2- molar, 3- angular, 4- condylar, and 5- basal cortical bone regions on right (R) and left (L) sides. Statistical significance was accepted at p<0.05 level. Intra- and inter-observer agreements demonstrated good to excellent consistency. In FMF patients, L3 and L4 values were higher, whereas L5 values were lower (p<0.05) than the control group. In terms of age, the difference between groups was insignificant in FMF patients (p>0.05), whereas in control group R3 and L4 values were higher in the 30< age group (p<0.05). Regarding gender and colchicine use, the difference between groups was insignificant (p>0.05). FMF disease might be a candidate for referral to DXA examination based on decreased bone density in the mandibular cortex detected by FD measurements on routine panoramic radiographs. Further studies are warranted to ascertain this relationship., Competing Interests: The authors have declared that no competing interests exist., (Copyright: © 2023 Ersan, Özel. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.)
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- 2023
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20. Perceived sources and levels of stress, general self-efficacy and coping strategies in preclinical dental students.
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Ersan N, Dölekoğlu S, Fişekçioğlu E, İlgüy M, and Oktay İ
- Subjects
- Adult, Age Factors, Career Choice, Fear, Female, Humans, Male, Perception, Schools, Dental, Sex Factors, Social Behavior, Surveys and Questionnaires, Turkey, Workload psychology, Adaptation, Psychological, Self Efficacy, Stress, Psychological psychology, Students, Dental psychology
- Abstract
Dental education programs are known to be highly stressful and stress can affect general health. The aims were to identify sources of stress among preclinical students and to evaluate their perceived levels of stress, self-efficacy and effective coping strategies in a private dental school. One hundred preclinical students in a Turkish private dental school were surveyed using dental environment stress (DES), perceived stress (PSS), general self-efficacy (G-SES) and brief coping scales (Brief-COPE). Age, gender, history of psychiatric treatment, factors that affected the choice of dentistry, choice rank of dental school, scholarship and income was recorded. 'Exams and grades' followed by 'Fear of failing course or year' were found to be the most stressprovoking factors. The most and the least stressprovoking DES domains were 'Workload' and 'Social stressors', respectively. 'Social stressors' affected male more than female (p < .05). The most and the least common coping strategies were found to be 'Planning', and 'Drug', respectively. Female used 'Instrumental support' more than male (p < .05). Demographic factors had impact on the perceived stress factors and levels, as well as coping strategies. Unlike previous studies establishing high stress levels in dental students, preclinical students displayed moderate level of stress. Clinical dental education might be more responsible for creating stress.
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- 2018
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21. Perceived sources and levels of stress, general self-efficacy and coping strategies in clinical dental students.
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Ersan N, Fişekçioğlu E, Dölekoğlu S, Oktay İ, and İlgüy D
- Subjects
- Adult, Female, Humans, Male, Young Adult, Adaptation, Psychological, Self Efficacy, Stress, Psychological etiology, Stress, Psychological psychology, Students, Dental psychology
- Abstract
The aims of this study were to identify sources of stress among clinical students and to evaluate the students' perceived levels of stress, general self-efficacy and effective coping strategies in a private dental school environment. The study group consisted of 130 undergraduate clinical dental students in a Turkish private dental school, during the academic year 2014-2015. The students were surveyed using modified version of the dental environment stress (DES) survey, the perceived stress scale, the general self-efficacy scale (G-SES) and the brief coping scale. Age, sex, year of study, history of psychiatric treatment and factors that affected the choice of dentistry were also recorded. Final year and female clinical dental students, who were found to be the most stressful students, had moderate to high perceived stress scores. Total and 'Faculty and administration' related DES scores increased with the year of study. Stressors related to 'Workload' and 'Clinical training' affected females more than males. G-SES scores were higher in male students and students, who had no history of psychiatric treatment. The most and the least common coping strategies were 'Planning' and 'Substance abuse', respectively. 'Religion' was found to be one of the main coping strategies. Stress factors affecting Turkish clinical dental students studying at private dental school differed from the previously reported stress factors affecting students studying at a governmental dental school. Advanced year and female students experienced more stress than the other students.
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- 2017
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22. Evaluation of pneumatization in the articular eminence and roof of the glenoid fossa with cone-beam computed tomography.
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İlgüy M, Dölekoğlu S, Fişekçioğlu E, Ersan N, and İlgüy D
- Abstract
Background: Detection of air cavities, so called pneumatizations, nearby to the temporomandibular joint (TMJ) area is important, as they represent sites of minimal resistance and facilitate the spread of various pathologies into the joint as inflammation, tumor or fractures and serve as a possible complicating factor in TMJ surgery., Aims: To determine the prevalence of pneumatization of the articular eminence (PAT) and roof of the glenoid fossa (PRGF) using cone-beam computed tomography (CBCT)., Study Design: Cross-sectional study., Methods: Acquired images of 111 patients (222 TMJs) were evaluated. The presence of pneumatization was recorded at the articular eminence and roof of the glenoid fossa. Age and gender were recorded for all patients and type (unilocular or multilocular) and laterality were noted for the cases of pneumatization., Results: The mean age of the study group was 48.86±18.31 years. Among all the patients, 73 (65.8%) had PAT, while 13 (11.7%) had PRGF. Forty-two (37.8%) of the patients had PAT bilaterally; whereas 3 of them (2.7%) presented PRGF bilaterally. The percentage of PAT was higher for females (73.6%) than males (51.3%) (p<0.05)., Conclusion: CBCT images are an accurate and reliable means of detection of the exact size and type of pneumatization and the relationship of pneumatization to the adjacent tissues. This is especially significant before a surgical intervention is planned in this region, in order to make a sound diagnosis.
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- 2015
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23. Measurements of the foramen magnum and mandible in relation to sex using CBCT.
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İlgüy D, İlgüy M, Ersan N, Dölekoğlu S, and Fişekçioğlu E
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Discriminant Analysis, Female, Foramen Magnum anatomy & histology, Forensic Anthropology, Humans, Imaging, Three-Dimensional, Male, Mandible anatomy & histology, Middle Aged, Retrospective Studies, Young Adult, Cone-Beam Computed Tomography, Foramen Magnum diagnostic imaging, Mandible diagnostic imaging, Sex Determination by Skeleton methods
- Abstract
The purpose of this study was to evaluate pre-existing CBCT images of a large sample of adult females and males to provide data on foramen magnum and mandibular measures of sexual dimorphism for use as a reference sample in cases of establishing identity in unknown fragmentary skulls. The study group consisted of 161 adult patients. 3D images of the patients were assessed retrospectively. FM measurements were obtained from reformatted axial sections. Six mandibular measurements were taken. According to the results, the study identified four mandibular measurements as final predictors of sex which are as follows: the gonial angle (G-angle) and ramus length (Ramus-L), gonion-gnathion length (G-G-L) and bigonial breadth (BG-Br). It was found that the cross-validated grouped overall predictive accuracy was 83.2% for FM and mandible measurements. It could correctly identify males in 77.3% and females in 87.4% of the cases. To assess sexual dimorphism, the gonial angle and ramus, gonion-gnathion lengths, and bigonial breadth of the mandible and sagittal diameter of the FM may be used on CBCT images., (© 2014 American Academy of Forensic Sciences.)
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- 2014
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24. Articular eminence inclination, height, and condyle morphology on cone beam computed tomography.
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İlgüy D, İlgüy M, Fişekçioğlu E, Dölekoğlu S, and Ersan N
- Subjects
- Adolescent, Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, Sex Factors, Cone-Beam Computed Tomography, Osteoarthritis diagnostic imaging, Temporomandibular Joint diagnostic imaging
- Abstract
Aim: The aim of the present study was to examine the relationship between articular eminence inclination, height, and thickness of the roof of the glenoid fossa (RGF) according to age and gender and to assess condyle morphology including incidental findings of osseous characteristics associated with osteoarthritis (OA) of the temporomandibular joint (TMJ) using cone beam computed tomography (CBCT)., Materials and Methods: CBCT images of 105 patients were evaluated retrospectively. For articular eminence inclination and height, axial views on which the condylar processes were seen with their widest mediolateral extent being used as a reference view for secondary reconstruction. Condyle morphology was categorized both in the sagittal and coronal plane., Results: The mean values of eminence inclination and height of males were higher than those of females (P < 0.05). There were significant differences in the RGF thickness in relation to sagittal condyle morphology. Among the group of OA, the mean value of the RGF thickness for "OA-osteophyte" group was the highest (1.59 mm), whereas the lowest RGF values were seen in the "OA-flattening.", Conclusion: The sagittal osteoarthritic changes may have an effect on RGF thickness by mechanical stimulation and changed stress distribution. Gender has a significant effect on eminence height (Eh) and inclination.
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- 2014
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25. Teriparatide and the treatment of bisphosphonate-related osteonecrosis of the jaw: a rat model.
- Author
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Ersan N, van Ruijven LJ, Bronckers AL, Olgaç V, Ilgüy D, and Everts V
- Subjects
- Acid Phosphatase analysis, Alveolar Process drug effects, Alveolar Process pathology, Animals, Apoptosis drug effects, Biomarkers analysis, Bisphosphonate-Associated Osteonecrosis of the Jaw pathology, Bone Density drug effects, Bone Density Conservation Agents administration & dosage, Bone Density Conservation Agents adverse effects, Bone Marrow drug effects, Bone Marrow pathology, Cell Adhesion drug effects, Cell Count, Diphosphonates administration & dosage, Diphosphonates adverse effects, Diphosphonates therapeutic use, Disease Models, Animal, Female, Imidazoles administration & dosage, Imidazoles adverse effects, Imidazoles therapeutic use, Injections, Intraperitoneal, Injections, Subcutaneous, Isoenzymes analysis, Molar surgery, Osteoclasts drug effects, Osteoclasts pathology, Osteogenesis drug effects, Random Allocation, Rats, Rats, Sprague-Dawley, Tartrate-Resistant Acid Phosphatase, Teriparatide administration & dosage, Tooth Extraction, Tooth Socket drug effects, Tooth Socket pathology, X-Ray Microtomography, Zoledronic Acid, Bisphosphonate-Associated Osteonecrosis of the Jaw prevention & control, Bone Density Conservation Agents therapeutic use, Teriparatide therapeutic use
- Abstract
Objectives: The objectives of this study were to establish a bisphosphonate-related osteonecrosis of the jaw (BRONJ) rat model and to analyse the effects of teriparatide (TP) on this model., Methods: Sprague-Dawley rats were divided into three groups: I-zoledronic acid (ZA, n = 10); II-ZA and teriparatide (ZA + TP, n = 10); III-control (n = 10). Osteonecrosis was induced by administering zoledronic acid to groups ZA and ZA + TP. A week after the injections, rats underwent extraction of the first left mandibular molar. Following a four week period, TP was administered to the ZA + TP group for 28 days. Upon killing, extraction sockets were examined clinically, radiologically and histopathologically., Results: Clinical examination revealed necrotic bone exposure in none of the animals. MicroCT (µCT) examination showed that bone mineral density of the newly formed bone in the extraction socket was lower in the ZA group than in the ZA + TP group (p < 0.05). Histopathological examination revealed that only the ZA and ZA + TP groups developed osteonecrosis, and the osteonecrotic bone area in the ZA group was larger than that in the ZA + TP group (p < 0.05). Tartrate-resistant acid phosphatase (TRAcP) enzyme histochemistry revealed that the number of detached and large osteoclasts were higher in the ZA group than in other groups, whereas the number of apoptotic osteoclasts in both ZA and ZA + TP groups were higher than in the control group (p < 0.05)., Conclusions: Our data indicate that bisphosphonate-related osteonecrosis of the jaw model used in the present study is an attractive model to investigate treatment modalities and that TP might be an effective treatment in BRONJ.
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- 2014
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26. In Vitro Detection of Dental Root Fractures with Cone Beam Computed Tomography (CBCT).
- Author
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Fisekcioglu E, Dolekoglu S, Ilguy M, Ersan N, and Ilguy D
- Abstract
Background: Since the diagnosis of non-displaced longitudinal fractures present difficulties for the dentist, three-dimensional evaluation is necessary., Objectives: The aim of this study is to demonstrate the accuracy of cone beam computed tomography (CBCT) in detecting dental root fractures in vitro., Materials and Methods: An in vitro model consisting of 210 recently extracted human mandibular teeth was used. Root fractures were created by mechanical force. The teeth were placed randomly in the empty dental alveoli of a dry human mandible and 15 different dental arcs were created. Images were taken with a unit Iluma ultra cone-beam CT scanner (Imtec Corporation, Germany). Three dental radiologists separately evaluated the images., Results: According to the fracture types and fracture presence, there was an overall statistically significant agreement between the key and readings. Kappa values for intra observer agreement ranged between 0.705 and 0.804 indicating that each observer gave acceptable ratings for the type and presence of fractures., Conclusions: Detailed information about root fractures may be obtained using CBCT.
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- 2014
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27. Assessment of root canal treatment outcomes performed by Turkish dental students: results after two years.
- Author
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Ilgüy D, Ilgüy M, Fisekçioglu E, Ersan N, Tanalp J, and Dölekoglu S
- Subjects
- Adult, Dental Restoration, Permanent standards, Dental Restoration, Permanent statistics & numerical data, Equipment Failure, Female, Follow-Up Studies, Humans, Male, Middle Aged, Outcome Assessment, Health Care, Radiography, Root Canal Therapy standards, Tooth Root diagnostic imaging, Turkey, Clinical Competence, Dental Pulp Cavity diagnostic imaging, Endodontics education, Root Canal Therapy statistics & numerical data, Students, Dental
- Abstract
The aim of this study was to evaluate radiographically the periapical status and technical standard of root canal therapies performed by a group of undergraduate dental students in Turkey two years following completion of the treatments. A random sample of 264 patients who received root canal treatment from undergraduate students at the Yeditepe University Faculty of Dentistry in 2009 were recalled after two years. The study sample consisted of 319 root-filled teeth in 158 dental patients (females=97, males=61) who presented to the student clinics during that time frame. For each root-filled tooth, two periapical radiographs were examined to identify the periapical status, one showing pre-treatment and the other showing post-treatment status. The quality of endodontic treatment was examined according to the distance between the end of root filling and radiographic apex and the density of the obturation according to presence of voids within the root filling material. This examination found that 54.2 percent of roots had fillings of acceptable length, while 37.3 percent were short, 7.8 percent were overfilled, and 0.6 percent was unfilled; 2.5 percent of the teeth were observed with broken root canal instruments. After two years, PAI scores of teeth with acceptable length of root canal filling (0-2 mm from the radiographic apex) were found to be lower than those of the overfilling and short filling cases (>2mm) (p<0.01). Moreover, voids were detected in the root canal fillings of 52.7 percent of endodontically treated teeth. The PAI scores of root fillings with inadequate density were significantly higher than adequate ones (p<0.01). Although endodontic treatments performed by undergraduate students do not appear to be unqualified compared to those performed by general practitioners, more emphasis must be placed on the technical quality of endodontic treatment to obtain better results.
- Published
- 2013
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