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Removable partial dentures (RPDs) are an indication for Kennedy Class IV planification. However, in long edentulous space, it becomes a biomechanical challenge, since it results in an anterior free end, in turn, and in lever movements. Such conditions can create a greater probability of bone loss, torque on abutment teeth and instability of the denture. In this sense, strategies to improve the biomechanical performance of RPDs are essential in planning. The objective of this clinical case is to report the prosthetic rehabilitation of a partially edentulous patient, IV Kennedy classification, with implant-assisted RPD. Patient was complaining that her RPD in the upper arch was unstable and, among the treatment plan options, the chosen one was rehabilitation with a RPD supported by the molars (16 and 17; 26 and 27) and two implants in the 13 and 23 regions. Finally, o-ring components were installed on the implants and captured. Rehabilitation resulted in a RPD with favorable retention, stability, and esthetics. It is concluded that this treatment option contributed to the resolution of a clinical challenge derived from the difficulties associated with a long edentulous space in the anterior region and provided the patient with an aesthetic and functional denture. [ABSTRACT FROM AUTHOR]

Purpose: To survey dentists in Germany regarding their preferred cementation regimen for fixed dental prostheses (FDPs) fabricated from various restorative materials. Materials and Methods: An online survey was developed for completion by dentists in Germany between 08/2019 and 02/2020. The questionnaire gathered information about the cementation regimen (conventional, including the acid-base cements zinc-oxide phosphate or any glass-ionomer cement; self-adhesive; adhesive; don't know) that the participant would preferably select for the insertion of single- or multi-unit FDPs fabricated from various restorative materials. Data were also collected on demographic and personal characteristics. Results: A total of 721 dentists completed the survey, and the data from 688 questionnaires were included in the analysis. Conventional cementation was the option of choice for restorations fabricated from alloy/porcelain-fused- to-metal among 91.0% of the participants and for restorations fabricated from polycrystalline ceramics among 42.9% of the participants. Adhesive cementation was preferred for restorations fabricated from feldspathic/leucite-reinforced glass ceramics (77.9%), lithium-disilicate glass ceramics (67.5%), zirconia-reinforced lithium-silicate glass ceramics (42.0%), and CAD/CAM resin composites (63.8%). Uncertainties regarding the appropriate cementation protocol for restorations fabricated from CAD/CAM resin composites were reported by 15% of the participants. More than 20% of the participants selected a technique that is less or not at all recommended for the cementation of restorations fabricated from zirconia-reinforced lithium-silicate glass ceramic and CAD/CAM resin composites. Conclusion: The results of the survey suggest that dentists in Germany select the cementation regime depending on the restorative material. Some of the participating dentists selected cementation regimens that are less or not at all recommended for restorations fabricated from zirconia-reinforced lithium-silicate glass ceramic and CAD/CAM resin composites, or were not sure about the appropriate cementation protocol. [ABSTRACT FROM AUTHOR]

Introduction: Ectodermal dysplasia is a rare genetic disorder that affects structures derived from ectoderm such as teeth, hair, nails, and sweat glands. Oligodontia is a common finding that affects the chewing, smiling and self- esteem of these pediatric patients. Case Report: We present a case report of a 7-years-old pediatric patient who consulted with his mother, showing the same condition. The intervention consisted of a removable prosthesis with satisfactory results. Conclusion: The X-linked hypohidrotic ectodermal dysplasia represents a challenge for a pediatric dentist who offers rehabilitation to the patient according to craniofacial development, age, socioeconomic status, and the number of missing teeth.

Objectives: Stability values of mini-implants (MIs) are ambiguous. Survival data for MIs as supplementary abutments in reduced dentitions are not available. The aim of this explorative research was to estimate the 3-year stability and survival of strategic MIs after immediate and delayed loading by existing removable partial dentures (RPDs). Material and methods: In a university and three dental practices, patients with unfavorable tooth distributions received supplementary MIs with diameters of 1.8, 2.1, and 2.4 mm. The participants were randomly allocated to group A (if the insertion torque ≥ 35 Ncm: immediate loading by housings; otherwise, immediate loading by RPD soft relining was performed) or delayed loading group B. Periotest values (PTVs) and resonance frequency analysis (RFA) values were longitudinally compared using mixed models. Results: A total of 112 maxillary and 120 mandibular MIs were placed under 79 RPDs (31 maxillae). The 1st and 3rd quartile of the PTVs ranged between 1.7 and 7.8, and the RFA values ranged between 30 and 46 with nonrelevant group differences. The 3-year survival rates were 92% in group A versus 95% in group B and 99% in the mandible (one failure) versus 87% in the maxilla (eleven failures among four participants). Conclusions: Within the limitations of explorative analyses, there were no relevant differences between immediate and delayed loading regarding survival or stability of strategic MIs. Clinical relevance: The stability values for MIs are lower than for conventional implants. The MI failure rate in the maxilla is higher than in the mandible with cluster failure participants. Clinical trial registration: German Clinical Trials Register (Deutsches Register Klinischer Studien, DRKS-ID: DRKS00007589, www.germanctr.de), January 15, 2015. [ABSTRACT FROM AUTHOR]

Objective: The purpose of this study was to measure the surface roughness and compare the fit of a cobalt-chromium selective laser-melted removable partial denture framework and a titanium binder jetting removable partial denture framework. Materials and methods: A design for a removable partial prosthesis framework was made using 3Shape software, and thereafter, one framework was additively manufactured in cobalt-chromium with selective laser melting and one in titanium using binder jetting technology. The weight of the frameworks was measured, and the surface parameters Sa, Sds, and Sdr were measured by white light interferometry. The fit of the frameworks was analyzed using visual inspection and the pressing test. Results: The weight of the frameworks in their post-printed state was 15.66 g and 7.43 g for cobalt-chromium and titanium, respectively. After finishing and polishing, the cobaltchromium framework's outer surface showed a high shine and smooth surface, with lower values in the Sa and Sdr parameters. The visual inspection showed gaps in the titanium framework, and the pressing test detected movement greater than 0.5 mm for the same material. Conclusion: The Ti framework showed higher surface roughness and was left with a lackluster finish after polishing. Also, the fit of the Ti framework was not clinically acceptable. The additive manufacturing binder jetting technology for titanium needs improvement or an adjustment of the settings to be used for clinically removable partial dentures. The cobalt-chromium framework manufactured by selective laser melting showed an acceptable clinical fit and surface roughness. [ABSTRACT FROM AUTHOR]

Due to the constant search for a harmonic smile, the level of demand and the expectations of patients become high, enabling the development of new materials and dental techniques that aim at more conservative procedures and more and more predictable results aesthetically. Techniques with Computer Aided Design and Computer Aided Manufacturing (CAD / CAM) have occupied a prominent place in Dentistry. This is due to the fact that computer aided design or computer aided manufacturing offers a restoration method that lowers the risk of human error and provides highly aesthetic results in a reduced clinical time, albeit at relatively high costs. The objective of the present study is to present, through a clinical case report, an aesthetic rehabilitation through the practical application of the CAD / CAM system. With the completion of the case, it was possible to observe aesthetic improvement through the preparation of the anterior ceramic crowns and improvement of the occlusal condition with the manufacture of a removable upper prosthesis, which enables greater durability of the ceramic crowns, as it better distributes the occlusal loads among the elements, avoiding excessive loads at the site of new indirect restorations. This case report was carried out in two dental sessions, achieving patient aesthetic satisfaction. It has a short-term follow-up, therefore, cases with long-term follow-up are necessary to prove the success of this technique. The high technological cost can be considered a limitation, but there is a notable advance in Dentistry to improve the quality of treatment in extremely short periods.

PurposeThe study aims to evaluate clinically the thickness of the alveolar ridge mucosa underneath a zirconia implant-supported restoration with a modified ovate pontic.Materials and methodsSixty-five patients, 32 women and 33 men (mean age: 65.5 years; range 38-81), were included. A total of 383 implants (303 in the maxilla; 80 in the mandible), supporting 81 full or partial fixed dental prostheses (65 in the maxilla; 16 in the mandible), were either cement- or screw-retained. Three years after loading, a total of 219 pontic sites (153 in the maxilla; 66 in the mandible) were measured, and the thickness of the alveolar ridge mucosa between the prosthetic surface and the underlying bone crest were recorded.ResultsThe overall implant and prosthesis survival rates at 3 years were 98.7% and 100%, respectively. No implant complications were reported, scoring a cumulative implant success rate of 100%. In the maxilla, the overall mean thickness of the alveolar ridge mucosa was 2.32 ± 0.57 mm. In the mandible, the overall mean thickness of the alveolar ridge mucosa was 2.20 ± 0.62 mm. There was no statistical difference between the overall mean values in the maxilla and mandible (p = .471).ConclusionThis radiologic retrospective study suggests the existence of a physiological barrier, named prosthetic biological width, underneath a novel pontic-designed restoration.

PurposeThe study aims to evaluate clinically the thickness of the alveolar ridge mucosa underneath a zirconia implant-supported restoration with a modified ovate pontic.Materials and methodsSixty-five patients, 32 women and 33 men (mean age: 65.5 years; range 38-81), were included. A total of 383 implants (303 in the maxilla; 80 in the mandible), supporting 81 full or partial fixed dental prostheses (65 in the maxilla; 16 in the mandible), were either cement- or screw-retained. Three years after loading, a total of 219 pontic sites (153 in the maxilla; 66 in the mandible) were measured, and the thickness of the alveolar ridge mucosa between the prosthetic surface and the underlying bone crest were recorded.ResultsThe overall implant and prosthesis survival rates at 3 years were 98.7% and 100%, respectively. No implant complications were reported, scoring a cumulative implant success rate of 100%. In the maxilla, the overall mean thickness of the alveolar ridge mucosa was 2.32 ± 0.57 mm. In the mandible, the overall mean thickness of the alveolar ridge mucosa was 2.20 ± 0.62 mm. There was no statistical difference between the overall mean values in the maxilla and mandible (p = .471).ConclusionThis radiologic retrospective study suggests the existence of a physiological barrier, named prosthetic biological width, underneath a novel pontic-designed restoration.

Immediately loaded implant prostheses have been used to successfully rehabilitate completely edentulous arches. Risk factors for successful treatment have not included involuntary mandibular movements. The treatment was completed on a patient with a history of neuroleptic medications who had remaining mandibular teeth extracted and then developed involuntary mandibular movements. The patient was dissatisfied with a mandibular removable prosthesis and wanted a fixed prosthesis. The immediate implant loading of a complete arch fixed prosthesis was delivered, and the patient lost 3 of the 6 implants. The patient continued to have problems with her definitive prostheses as the symptoms of her involuntary mandibular movements worsened.

Background: Distal edentulous spaces can be challenging when rehabilitation with dental implants is limited. Attachment-retained removable partial dentures [RPD] work as a therapy that can compensate rotational movements and reduce the number of abutments. Case description: This clinical report addresses indications, selection and procedures for the rehabilitation of a partially edentulous maxilla, involving laminate veneers, fixed and removable prostheses. Practical implications: Attachment-retained RPDs provide sufficient retention and improved aesthetics compared to clasp-retained partial dentures. Careful aesthetic and functional planning and periodic follow-up are essential for patients' satisfaction. [ABSTRACT FROM AUTHOR]

Background/Aim. A large number of studies have been conducted on the survival rate of ceramic single tooth restorations, but few studies have discussed the influence of the number of restoration surfaces on their survival rate. This study aimed to evaluate the survival rate of ceramic inlay and onlay restorations in posterior teeth with one-surface or multi-surface after a 10-year follow-up. Methods. PubMed, Web of Science, Cochrane Library, Embase, and Wanfang databases were searched for articles published by July 31, 2016. Randomized controlled trials and non-randomized trials were collected and patients with posterior teeth defect were included. Publication bias and sensitivity analysis were also assessed. Results. Five studies comprising 6,720 cases were included in this meta-analysis. The results indicated that the survival rate of ceramic inlay and onlay restorations with two-surface was significantly higher than that of onesurface restorations (within 10 years) [hazard ratio (HR) = 2.11; 95% confidence interval (CI) = 1.33-3.36, p = 0.002], and the survival rate of three-surface restorations was higher than that of two-surface ones (HR = 2.50; 95% CI = 1.36-4.59, p = 0.003). Conclusion. The current meta-analysis shows that the increase in the ceramic inlay and onlay restoration surfaces increases their survival rate within a 10-year period. [ABSTRACT FROM AUTHOR]

Objective: To compare the indirect and CAD/CAM techniques and using acrylic and composites resins on the fracture resistance of provisional 3-unit fixed partial dentures (FPDs). Materials and Methods: In in vitro setting, thirty samples were divided into three groups included 10 FPDs manufactured indirectly and made of composite based bis-acryl (Protemp 4) resin, 10 FPDs indirectly milled with polymethyl methacrylate resin (PMMA) and 10 FPDs fabricated by CAD/CAM PMMA blocks. Fracture resistance was measured using universal testing machine (UTM). The master model was made of NiCr-alloy which designed using CAD/CAM technology. Results: FPDs fabricated using CAD/CAM PMMA blocks showed the highest fracture resistance values followed by Protemp 4 and then PMMA using indirect method. Statistically significant difference was found between the three groups (P=0.001). Bonferroni test was applied for pair wise comparison, in which the statistically significant difference was observed between FPDs fabricated by CAD/CAM which made of PMMA blocks and Protemp 4 and between CAD/CAM PMMA blocks and indirect/PMMA FPDs and between indirect/Protemp 4 FPDs and indirect/PMMA FPDs. Hence this suggested that PMMA significantly has minimum value of fracture resistance when compared to both CAD/CAM and Protemp 4. Conclusion: This study proved the superiority of CAD/CAM PMMA blocks for fabricating 3-unit FPDs over Protemp 4 and PMMA using indirect method, and the superiority of Protemp 4 over PMMA in terms of fracture resistance using indirect methods. [ABSTRACT FROM AUTHOR]

Objectives: To assess contour changes of peri-implant tissues comparing a one- and a two-piece dental implant system over 12 years. Materials and methods: Patients seeking implant therapy were enrolled and randomly allocated to receive implants (a one-piece (STM) or a two-piece (BRA) system). Impressions were taken at the time of insertion of the final reconstruction (BL), after 1 year (FU-1), 5 years (FU-5), and at 12 years (FU-12). Thirty patients were included in the analysis (STM, 16; BRA, 14). Digital scans of casts were superimposed and analyzed in an image analysis program. Measurements included changes of the crown height, contour changes on the buccal side of the implants and the contralateral teeth (control). Results: Contour changes at implant sites revealed a loss of − 0.29 mm (STM) and − 0.46 mm (BRA) during an observation period of 12 years. Contour changes at the corresponding tooth sites amounted to − 0.06 mm (STM) and − 0.12 mm (BRA) during the same time period. The implant crown gained 0.25 mm (STM) and 0.08 mm (BRA) in height due to recession of the marginal mucosa. The corresponding gain in crown height at the contralateral tooth sites amounted to 0.36 mm (STM) and 0.10 mm (BRA). Interproximal marginal bone level changes measured − 0.28 mm (STM) and − 1.11 mm (BRA). The mean BOP amounted to 38.8% (STM) and 48.7% (BRA) at the 12-year follow-up (FU-12). Conclusion: Minimal changes of the peri-implant soft tissue contour were observed at implant sites over the period of 12 years irrespective of the use of a one- or a two-piece implant system. The differences between the implant sites and corresponding teeth were clinically negligible. Clinical relevance: Peri-implant soft tissue stability is of high clinical relevance when monitoring dental implant sites on the long run. Clinical data on the extent of soft tissue changes around different implant systems are scarce. The present RCTs demonstrate minimal changes of the peri-implant soft tissue contour 12 years after implant insertion independent of the use of a one- or a two-piece implant system. [ABSTRACT FROM AUTHOR]

Background/Aim: The aim of this study was to examine prevalence of different Candida spp. at diabetics and nondiabetics wearing dentures without clinical signs of Denture Stomatitis (DS) and to study if some local and systematic factors are confounders for harboring Candida at these subjects. Material and Methods: Total of 60 subjects wearing partial or complete upper acrylic denture having at least half of palatal mucosa covered by denture were selected and stratified into three experimental groups: systematically health subjects; patients with diagnosed Type 2 Diabetes (T2D) and good glycoregulation; and T2D subjects with poorly regulated blood sugar level. Cotton swab samples were obtained from each patient from hard palate mucosa and denture surface. Swab cultures were made on Sabouraud dextrose agar and ChromAgar Media for distinciton of various Candida spp. Density growth was also measured. Results: Frequency of Candida spp. findings were similar between groups. At healthy subjects, only C.albicans was detected. At diabetics, C.albicans was the most common isolated species, followed by C.glabrata and C.tropicalis. Negative finding of yeasts on palatal mucosa, but positive on denture surface were detected at all groups, with the highest frequency (33.4%) at diabetics with poor glycoregulation. Denture surface was heavier colonized than hard palate mucosa. Duration of diabetes in years were only independent predictors for harboring Candida spp. at denture surface (Exp B=1.186, CI=1.047-1.344, p=0.007). Conclusions: Prosthesis of denture wearers without DS may serve as reservoir of Candida spp. Presence of more pathogenic and resistant non-albicans species are related to diabetics, even without clinical signs of DS.

OBJECTIVE: The aims of this study were to, (a) Assess the level of skill acquired for designing removable partial dentures through two teaching methods individually, on two courses of dental graduates. (b) Compare the level of skill of dental graduates acquired through two teaching methods for designing removable partial dentures for diverse clinical situations. Materials and METHODOLOGY: This quasi-experimental study comprised of application of two interactive teaching methods over two courses of Dental students over a period of three years. Course I, (n=113) was assessed with a brainstorming session without a prior formal lecture. Course II (n=102) was exposed to an interactive lecture followed by a formative assessment of RPD deigning. Each participant was asked to design a removable partial denture for a clinical scenario. Assessment was based on specific satisfaction criteria. Data was analyzed descriptively and compared with student's t test. RESULTS: Out of all participants, 70 % of participants in course I and 63% percent from course II showed partial satisfaction. 8-15 % were able to achieve complete satisfactory scores. On comparison of two courses, mean total score in course I was 3.31 ± 1.21 and in course II mean total score was 3 ± 1.30, thus, p-value was 0.072, which was statistically insignificant. CONCLUSION: The level of skill acquired for designing a removable partial denture through two interactive teaching methods was only partially satisfactory for most participants of both courses. The level of skill acquired from brainstorming was comparable to the skill acquired from an interactive lecture. The difference of assessment scores in both scenarios was not statistically significant. [ABSTRACT FROM AUTHOR]

Background. Delayed loading is one of the concerns in implant patients. Immediate loading can solve the problem and make patients more satisfied. The present study aimed to compare the removal torque of maxi implants under different loading (immediate and delayed) patterns. Methods. This split-mouth experimental study included 2 dogs. Impressions were made and then all the premolars were extracted under general anesthesia. After a three-month healing period, 3 implants were inserted in each quadrant (a total of 12 implants). Anterior and posterior implants (the case group) were splinted by an acrylic temporary bridge in order to make the middle implants (the control group) off the occlusion. The dogs were sacrificed after 6 weeks and bone blocks were submitted for removal torque test. Data were analyzed with ANOVA (P

ABSTRACT Introduction Dental implant therapy, when well planned, can contribute to the patient's quality of life and is an important tool for solving a serious public health problem in various parts of the world. Objective This study investigated peri-implant health in fixed implants supported by an immediate loading technique and to associate those outcomes with sociodemographic conditions. Material and method After the disassembly of the prostheses on implants with the “Branemark Model” the peri-implant health of 93 patients was evaluated using dental plaque index (DPI), probing pocket depths (PPD), bleeding on probing (BOP), clinical attachment levels (CAL), and presence of gingival hyperplasia. Patients also answered a questionnaire about their gender, age, socioeconomic status (Brazilian Association of Research Companies - ABEP), general health and tobacco use. Result The most constant clinical findings were the presence of plaque, followed by gingival hyperplasia and periimplantitis, which was associated with disease progression. Most of the patients in the study were female, Caucasian, and under 60 years of age, with prostheses located in their lower arch, and they belonged to social classes A and B. Conclusion The presence of dental biofilm occurred in almost all implants and was not related to the presence of periimplantitis. The progression of periimplantitis with bone loss was related to sub gingival bleeding. The sociodemographic characteristics in the study did not present great correlations with the clinical variables of the dental implants studied.

Actuality the use of Fixed Partial Denture with Cantilever until causes many doubts, making de dentist do not indicate this treatment. To making clear the characteristics relation to this prosthesis, was done a literature review. A search was performed in the Scielo and Pubmed databases using the keywords: Fixed prosthesis, cantilever, supporting teeth. The articles within the scope of the study were selected and it can be concluded that these were an alternative excellent to reestablish the follow teeth, therefore to obtain the good results with respect long-term prosthetic appliances, special attention should be dispensed to the biomechanics principles and optimal hygiene with plaque control should be established. [ABSTRACT FROM AUTHOR]

Copyright of Revista Estomatología is the property of Universidad del Valle and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Aims: To compare the radiographic marginal bone levels of implants placed in sites previously augmented with autogenous bone grafts and implants placed in native bone. Secondary outcomes included: implant survival, periodontal/peri‐implant parameters as well as short‐ and long‐term patient‐reported outcome measures. Materials and methods: The study was designed as a case–control study including 38 patients equally distributed into two groups (previously augmented with autogenous bone blocks [AB] and implants placed in native bone [NB]). In total, 67 implants were placed. Clinical, radiographic and patient‐reported outcome measures (PROMs), and complication rates were assessed based on a chart review and at a follow‐up examination (≧5 years after implant placement). Nonparametric mixed models were applied for the comparison of the two groups because of the clustered data. The data were analyzed descriptively, and p‐values were calculated using nonparametric mixed models to account for the clustered data. Results: The mean follow‐up time was 10.2 years (range 6–13 years; AB) and 8.3 years (range 5–16 years; NB). One implant was lost in group NB (97.5% survival rate) and none in group AB (100%). Following primary augmentation, six major complications (wound dehiscences, acute pulpitis, intra‐ and extraoral sensitivity disturbances) were observed at the donor sites. At time of implant placement, only minimal complications occurred and only in group NB. Median marginal bone levels at the follow‐up were significantly higher in group NB (1.15; Q1: 0.50 mm/Q3: 1.83 mm) than in group AB (1.58; Q1: 1.01 mm/Q3: 2.40 mm; p = 0.0411). Probing depth, bleeding on probing and recession values were similar in both groups. PROMs revealed high visual analog scale values (i.e., high satisfaction) for both procedures. Conclusions: Dental implants placed in sites augmented with autogenous bone or in native bone revealed healthy peri‐implant tissues after 5–16 years. Marginal bone levels were significantly higher for implant placed in native bone. Complications following primary augmentation encompassed every third patient but were mostly transient. [ABSTRACT FROM AUTHOR]

Background and Aim: Different attachment designs have been developed to connect implant to natural teeth in partial dentures; however, adequate studies have not been performed to determine stress distribution patterns in these designs. The present study aimed to assess stress distribution patterns in natural tooth and implant supported removable partial denture with different attachment designs using photoelastic analysis. Materials and Methods: In this in vitro, experimental study, a photoelastic model of a partially edentulous mandible was fabricated and two Ankylosis implants were inserted at the site of first molar teeth bilaterally. Implants and teeth were connected by a partial denture and the acrylic base and implants were connected using ball and telescopic crown attachment types. Two crowns, one with resilient and the other one with rigid at-tachment were fabricated on the abutment teeth. Separate frameworks were designed and removable partial dentures were fabricated. Next, 100 N load was applied vertically to the area between implant and tooth. The pattern of stress distribution in implant in use of different implant-tooth attachment designs was studied by means of photoelastic method. Results: The lowest stress concentration was noted in use of resilient attachment while rigid attachment showed the highest level of stress concentration. Conclusion: Resilient attachment between implant and tooth created minimum stress concentration in implant; however, removable partial dentures were slightly instable in use of this attachment type. The decision to use different implant-tooth attachment types must be made based on clinical conditions.

BACKGROUND: The difference of dental arch shape mainly refers to different anterior tooth arrangement, and the shape of dental arch has a certain influence on the peri-implant stress distribution. Current three-dimensional finite element analysis for implant-supported denture mainly focuses on the same dental arch shape, and little is reported on the biomechanical difference of different dental arch shapes. OBJECTIVE: To compare the biomechanical behaviors of implant-supported fixed partial denture with square, oval and tapered arch shapes using the method of three-dimensional finite element analysis. METHODS: Based on the Cone-beam CT data of the human jaw, three kinds of models of implant-supported fixed partial denture and the surrounding bone were established. The force of 300 N (100 N of incisor, lateral incisor or canine crown) was applied to the fixed bridges at an angle of 45o alone the long axis of the tooth from labial side to lingual side to evaluate the Von-Mises stress distribution of cortical bone and cancellous bone and the displacement of implant-abutment complex. RESULTS AND CONCLUSION: The Max EQV stress in the cortical bone and cancellous bone around the implant in the three models were ranked as tapered model > oval model > square model, and the Max displacement of the implant-abutment complex in the three models were ranked as tapered model > oval model > square model. Overall findings indicate that the square arch shape shows lower stress and better stress distribution than the other two arch shapes. [ABSTRACT FROM AUTHOR]

Abstract: Objectives: To assess the profilometric changes of the buccal soft tissues between baseline and 5 years of loading using a one‐ and two‐piece dental implant system. Materials and methods: Sixty patients randomly received dental implants of either a two‐piece type (BRA) or a one‐piece type (STM). Casts were obtained at baseline (after crown insertion), at the 1‐year and at the 5‐year follow‐up. Stereolithography files were obtained from the casts for digital superimposition. One implant and the contralateral natural tooth were selected for the analysis. Thirty‐three patients (BRA = 16; STM = 17) were included. Measurements included changes for crown height (CH) and estimated soft tissue thickness, as well as the profilometric change at the implant and the tooth site. Nonparametric methods were applied for the statistical analyses and medians and quartiles presented. Results: The BRA group lost −0.39 mm and the STM group lost −0.40 mm of volume between baseline and the 5‐year follow‐up at the implant site (p > 0.05). The tooth site lost −0.18 mm (BRA) and −0.12 mm (STM) (p > 0.05). Volume differences between implants and teeth amounted to −0.05 mm (baseline to 1 year) and −0.25 mm (baseline to 5 years) for BRA, while for STM, the values were 0.03 mm (baseline to 1 year) and −0.16 mm (baseline to 5 years). The changes for implant CH at 1 and 5 years of follow‐up amounted 0.10 and 0.09 mm (BRA) and to 0.03 and 0.22 mm (STM). The changes in tissue thickness at 1 and 5 years in the BRA group amounted to −0.28 and −0.66 mm at 1 mm, −0.21 and −0.46 mm at 3 mm, and −0.32 and −0.45 mm at 5 mm, respectively. The changes in the STM group amounted to −0.15 and −0.54 mm at 1 mm, −0.24 and −0.48 mm at 3 mm, and −0.32 and −0.57 mm at 5 mm, respectively. No significantly different medians were observed. Conclusions: Minimal profilometric and linear changes occurred at implant sites between baseline and 5 years, between implant and tooth sites and between the two implant systems. [ABSTRACT FROM AUTHOR]

Objective To study the application value of the clinical pathway in the repairing distal extension removable partial denture. Methods One hundred and thirty patients with free-end dentition defect were selected in this study. In the oral cavity, the conditions of the mucosa were similar in terms of the residual teeth and alveolar crest mucosa, and the two groups of the same species were divided into 65 pairs. The random digital table method was used to divide patients into clinical path group and traditional repair group. The frequency of adjustments during the adaptive phase, masticatory efficiency of the denture at ending of the adaptive phase, visible movement of the extension base during the masticatory, decay of abutment, abutments loosen and food embedded plug were compared between the two groups. Results The frequency of adjustments during the adaptive phase was significantly lower in clinical path group than that of traditional repair group [1.00 (1.00, 2.00) times vs. 3.00 (2.00, 4.00) times]. The masticatory efficiency of the denture was higher in clinical path group than that of traditional repair group (93.85% vs. 76.96%). The visible movement of the extension base during mastication (0 vs. 15.38%), decay of abutment (1.54% vs. 13.85%), abutments loosen (0 vs. 12.31%) and food embedded plug (1.54% vs. 15.38%) were significantly lower in clinical path group than those of traditional repair group (P＜ 0.05). Conclusion The retention and the stabilization of the removable partial denture can be improved by means of clinical pathway. By following the clinical path method, the removable partial denture shows reduced unstable state of the denture in the functional state and has a good prospect for clinical application. [ABSTRACT FROM AUTHOR]

Objectives To test whether or not a one- (S1) and a two-piece (S2) dental implant systems render the same biological, technical, and esthetic outcomes regarding implants and implant-supported reconstructions over an observation period of 4 to 6 years. Materials and methods Sixty patients were randomly assigned to receive S1 or S2 implants. The implants were restored with either fixed or removable prostheses. The insertion of the final reconstruction was chosen as baseline. One-year and 4- to 6-year ( FU-5) measurements included biological (e.g. marginal bone level, probing pocket depth, peri-implant mucositis, and peri-implantitis), technical (e.g. fracture or loosening of prosthetic screws, fracture or loosening of abutments, fracture of framework, and/or veneering ceramic (minor, major), loss of retention for cemented restorations), and esthetic parameters (visibility of the crown margin, shimmering of the implant through the mucosa, the level of the facial margo mucosae compared to the contralateral tooth or implant site and the modified papilla index) for implants and reconstructions. Survival and success rates of implants and reconstructions were calculated. Because of the asymmetric data distributions, nonparametric statistical methods were applied. Results The implant-based analysis revealed a cumulative implant survival rate of 97.9% (S1: 96.6%; S2: 98.9%) at FU-5. The median marginal bone level for group S1 changed from 0.51 mm at baseline to 0.49 mm at FU-5 and for group S2 from 1.02 mm to 1.35 mm ( P < 0.001). Patient-level analyses demonstrated a frequency of peri-implant mucositis of 7.7% (S1) and 10.0% (S2) and for peri-implantitis of 7.7% (S1) and 13.3% (S2) at FU-5. The patient-based cumulative implant survival rate was 94.6% (S1: 92.3%; S2: 96.7%). The overall patient-based biological complication rate amounted to 15.4% (S1) and to 23.3% (S2) ( P = 0.517), whereas the overall technical complication rates were 30.8% (S1) and 13.3% (S2) ( P = 0.349). The prosthetic survival rates were 93.1% for S1 and 100% for S2 ( P > 0.05). Conclusions Both implant systems reveal high survival rates on the implant and prosthetic level. Apart from marginal bone-level changes, biological and technical outcomes did not reveal significant differences between the two implant systems. [ABSTRACT FROM AUTHOR]

Copyright of Turkiye Klinikleri Journal of Dental Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Dentists often place post and core buildups on endodontically treated abutments for crown and bridge restorations. This article analyzes the bio-mechanical purposes, advantages and disadvantages of placing a core or a post and core in an endodontically treated tooth and reviews literature on post and core biomechanics. The author assesses the scientific rationale of the claim that the main purpose of a post is to retain a core, or the claim that posts weaken teeth. More likely, the main function of a post is to help prevent the abutment, on which a crown is cemented, from fracturing such that the abutment separates from the tooth root, at a fracture plane that is located approximately and theoretically at the level of the crown (or ferrule) margin. A post essentially improves the ferrule effect that is provided by the partial fixed denture prosthesis. This paper also explores the difference between bio-mechanical failures of crowns caused by lack of retention or excess taper, versus failures due to a sub-optimal ferrule effect in crown and bridge prostheses. [ABSTRACT FROM AUTHOR]

Background. Delayed loading is one of the concerns in implant patients. Immediate loading can solve the problem and make patients more satisfied. The present study aimed to compare the removal torque of maxi implants under different loading (immediate and delayed) patterns. Methods. This split-mouth experimental study included 2 dogs. Impressions were made and then all the premolars were extracted under general anesthesia. After a three-month healing period, 3 implants were inserted in each quadrant (a total of 12 implants). Anterior and posterior implants (the case group) were splinted by an acrylic temporary bridge in order to make the middle implants (the control group) off the occlusion. The dogs were sacrificed after 6 weeks and bone blocks were submitted for removal torque test. Data were analyzed with ANOVA (P<0.05). Results. Mean torque values for the cases and control groups were 46.82±25.58 and 59.88±15.19, respectively (P=0.582; not significant). Conclusion. It may be concluded that immediate loading does not reduce the reverse torque values of maxi implants. This supports the advantages of immediate loading for maxi implants. [ABSTRACT FROM AUTHOR]

Introduction. The prosthetic treatment of patients with cleft palate includes various treatment options such as fixed partial dentures, removable partial prosthesis, etc. The type of prosthetic appliance is determined by the oral health of each individual and the circumstances. We presented three adult patients with the cleft lip and palate subjected to prosthetic treatment. Case report. From the possible prosthetic solutions according to the conditions in the oral cavity and the circumstances, fixed partial dentures veneered with composite or ceramic were chosen. A proper relationship between the teeth was reached with the fixed partial dentures, and function established, the phonetics improved and satisfying aesthetics effect accomplished improving the profile appearance of the patient's face. Plastic surgery of the nose was performed after that. Conclusion. Multidisclipinary treatment is necessary for favourable long-term outcome in cleft lip and palate patients. [ABSTRACT FROM AUTHOR]

Background/Aim. Different types of dental restorations are used for the therapy of unilateral free-end saddle edentulism. Unilateral complex partial denture is one of the indications for the Kennedy class II partial edentulism. The abscence of major connector and denture plate is an advantage compared to the conventional restorations, because of better comfort and shorter period of adaptation. The aim of the study was to analyse the influence of free-end saddle length change on the behaviour of unilateral complex partial denture supporting structures. Methods. Stress levels of the canine and the first premolar as retentional teeth and the attachments were tested under the influence of physiological forces with the loading point shifting distally in relation to the saddle length change. A virtual real size 3D model of the fixed part of the restoration (the canine and the first premolar with milled crowns) was created using the CATIA computer program. It was connected to the mobile part of partial denture with the SD snap in latch attachment. Mobile part of the restoration was designed in the region of 2, 3 and 4 lateral teeth (second premolar, first, second and third molar). By using the finite element method (FEM) stress levels analysis was performed under the load of physiological forces of 150 N in the free-end saddle teeth zone. Results. The results of analysis show that physiological forces cause a different stress distribution on the abutment teeth and the attachment, depending on the saddle length. Conclusion. The stress level values obtained for the abutment teeth as well as the attachment are far lower than the marginal ones. The behaviour of the system changes under this defined stress, but no plastic deformation occurs.

OBJETIVO: verificar as características da mastigação em indivíduos usuários de prótese dentária removível parcial e total, analisando prováveis fatores interferentes associados à função mastigatória. MÉTODOS: participaram 53 indivíduos, ambos os sexos, entre 42 anos e 67 anos, divididos em dois grupos: 32 indivíduos usuários de prótese dentária total e/ou parcial removível estável (G1) e 21 indivíduos com dentição natural (G2). Foram critérios de exclusão: deficiência neurológica ou cognitiva, deformidades dentofaciais, disfunção temporomandibular e qualquer lesão bucal que pudesse interferir na mastigação. A avaliação foi realizada com pão de sal, solicitando-se mastigação habitual. Foram analisados: características das estruturas e da musculatura, tipo de corte, manutenção de vedamento labial, tempo de mastigação, número de ciclos mastigatórios, e tipo de mastigação: se uni ou bilateral, considerando-se predomínio unilateral em mais de 66% dos ciclos mastigatórios em um único lado. RESULTADOS: foram verificadas alterações quanto à característica do músculo masseter e ao tipo de corte para G1 com diferenças estatisticamente significantes, quando comparado à G2. As demais estruturas orofaciais, lábios, língua, bochechas, mentual, e postura de lábios durante a mastigação apresentaram-se normais para ambos os grupos. Não houve diferença significante entre os grupos quanto aos movimentos mandibulares, ao tipo, tempo e número de ciclos mastigatórios e caracterização da deglutição. CONCLUSÃO: a mastigação em usuários de prótese dentária removível caracteriza-se por alterações no corte do alimento, indefinição de tipo mastigatório, vedamento labial satisfatório, média do tempo e de ciclos mastigatórios semelhantes àqueles obtidos para indivíduos com dentição natural.PURPOSE: to check mastication characteristics in individuals using removable dental prosthesis, analyzing probable interference factors associated to functional mastication. METHODS: fifty-three individuals of both genders, between 42 and 67 year old, were divided in two groups: thirty-two individuals, users of total stable prosthesis dentures and/or partially stable removable prosthesis (G1); and twenty-one individuals with natural dentition (G2). the following exclusion criteria were used: neurological or cognitive deficiency, dental facial deformities, temporomandibular disorders and any mouth injuries which could interfere in mastication. Evaluation was done with salt bread, using habitual mastication. The analyses focused on: oral structures and muscle characteristics; type of cutting, maintenance of labial sealing; length of mastication time, number of masticatory cycles, and type of mastication: uni or bilateral, considering unilateral predominance in more than 66% of the cycles on just one particular side. RESULTS: alterations were noted as for the characteristics of the masseter muscle and type of food cutting for G1, with significant statistical differences when compared to G2. All other orofacial structures: lips, tongue, cheeks, mentual, and position of lips during mastication proved to be normal for both groups. There was no significant difference between the groups regarding jaw movements; type, time, and number of masticatory cycles and deglutition characterization. CONCLUSION: mastication in removable prosthesis users is characterized by alterations in the form of cutting food, undefined type of mastication, and satisfactory lips posture. The average time and the number of masticatory cycles are similar to those obtained for individuals with natural dentitions.

Introduction: The removable prostheses (RP) restore functions of the individual such as mastication, swallowing, phonation and breathing. When the RP is poorly designed or adapted, it causes damage to the oral mucosa (OM) of support. The most common injuries include denture stomatitis (DS). The DS is considered a risk factor for the occurrence of premalignant and malignant lesions in the oral cavity. Objective: To determine the frequency of DS in patients attending dental consultation of the Regional Hospital of Coronel Oviedo-Paraguay from July to September 2015. Methods: This research is a descriptive observational cross-sectional study. Results: 50 patients were assessed. 78% had DS. The DS distribution was as follows: according to Newton's classification: type I = 10%, type II = 60%, and type III = 8%; according to Kennedy's classification: class I = 10,26%, class II = 12,82% class III = 56,41%, class IV = 7,69%, edentulous total = 12,82%. The DS distribution by gender and age was as follows: male = 15.38%, female = 84,62%; from 10 to 20 years = 5.13%, from 21 to 30 years = 30.77%, from 31 to 40 years = 17.95%, from 41 to 50 years = 20.51%, from 51 to 60 years = 20.51%, and from 61 to 70 years = 5.13%. Conclusion: A high prevalence of DS was found. It is extremely important to have a control program, in which the function and effectiveness of the RP can be mediately monitored over time. [ABSTRACT FROM AUTHOR]

Aim: The purpose of this investigation was to document the reasons for placement, and replacement of crowns and fixed partial denture in a Nigerian Teaching Hospital. Methods: a retrospective review of patients that had advanced conservative procedures. A data collection form was used to gather the relevant information from the patients' case notes. Section A sought information on age , gender, educational level, patients' occupation etc. Section B recorded information on tooth/teeth involved, reason for fabrication of prosthesis and material used. Results: Three hundred and twenty six had 398 crowns while 23 patients received bridges. Patients' ages ranged from 16-85 years with a mean of 47.7 ± 17.2 years and a male to female ratio of 1:1.3. Thirty five percent of the crowned teeth were in the upper right quadrant, followed by the upper left quadrant with 29.4%. Upper right central incisors were the most frequently (15.6%) crowned teeth. Endodontics and esthetics were the most common reasons for initial crown placement and replacement respectively. About 60% of bridges fabricated were new, while 22.2% of replaced bridges were due to fracture of porcelain and unacceptable marginal adaptation. Conclusion: Endodontics and esthetics were the most common reasons for initial crown placement and replacement [ABSTRACT FROM AUTHOR]

Preservation of natural teeth has always been given prime importance in dentistry as it aids in preserving the alveolar ridge integrity, proprioceptive ability of the periodontium and enhances psychological comfort of the patient. Among removable partial dentures, cu-sil like denture serves as an easy and affordable treatment option for patient willing to replace their missing teeth while retaining their very few healthy remaining teeth. One of the main drawbacks of the Cu-sil like denture is that it is technique sensitive and requires special armamentarium and materials for its processing. This case series describes the fabrication of the cu-sil dentures without the soft liner. [ABSTRACT FROM AUTHOR]

Objectives To analyze clinical, esthetic, radiographic, and prosthetic outcomes of implants and implant-supported reconstructions using two types of dental implants with non-matching implant abutment junctions. Materials and methods A total of 64 patients in need of dental implant therapy with fixed reconstructions were consecutively enrolled. They were randomly assigned to either one of two implant systems (S1: Astra Tech Osseospeed and S2: Straumann Bone Level). Baseline (day of loading) and 1-year measurements included demographics, radiographic, clinical, biologic, prosthetic, and esthetic outcomes. All data were analyzed at the patient level and at the implant level. The nonparametric Mann-Whitney U-test was used to detect differences in continuous variables between two independent groups. Results Ninety-seven implants (S1 = 54, S2 = 43) were placed and loaded with fixed reconstructions in 64 patients. No implant was lost during the 1-year observation period resulting in a 100% survival rate for both implant systems. At the patient level, the mean marginal bone level at implant insertion was −1.30 mm ( SD ± 1.00 mm) for S1 and −1.26 mm (±1.22 mm) for S2 (negative values indicating bone levels coronal to the implant shoulder). At the time of loading, these distances measured 0.29 mm (±0.44 mm) for S1 and 0.22 mm (±0.43 mm) for S2. At the 1-year follow-up, these distances were 0.37 mm (±0.39 mm) for S1 and 0.39 mm (±1.02 mm) for S2. Technical complications of the reconstructions only occurred in Group S1, with a rate of 12% (patient level) ( P > 0.05). Biologic complications were observed at a rate of 6% (S1) and 3.2% (S2) at the patient level ( P > 0.05). Conclusions Both implant systems revealed 100% survival rates and minimal changes of the marginal bone levels during 1 year of loading. Few technical and biologic complications occurred. Therefore, both implant systems can be recommended for fixed reconstructions. [ABSTRACT FROM AUTHOR]

Introduction. Stomatoprothetic dentures are one of the factors of oral health and life quality of people of all ages. The aim of the paper is to make a connection between the oral health quality and quality of life on one side and the type of denture on the other. Material and Methods. This research study was conducted on the sample of 360 patients singled out in three numerically identical groups as follows: group I - patients treated with fixed dentures, group II - patients treated with mobile dentures, and group III - patients treated with both fixed and mobile dentures. The oral health quality was observed via five parameters: anamnestic data, symptoms of ill-functioning of basic functions in stomatogenic system (chewing and speech), extra oral examination, intraoral examination, and dental abilities. For some oral health quality parameters, the index of quality was determined. Results. Analyses of our three target groups of patients indicated that the patients from group I (treated with fixed dentures) suffered the least negative effects in line with the observed parameters; they are followed by patients from group III (combined dentures) and patients from group II (mobile dentures), respectively. Conclusion. Our research study showed that some oral health parameters have different impacts on health and life quality in patients treated with different stomatoprosthetic dentures. [ABSTRACT FROM AUTHOR]

The esthetic challenge of replacement of missing maxillary anterior tooth may be extremely demanding. It necessitates careful assessment i.e. both clinical and radiographic of each case. It involves multiple steps during planning and prosthetic phase. Nowadays various treatment options are available for replacement of missing teeth in esthetic zone. Each of them is indicated for a particular intra oral situation as well as for a particular phase of treatment. Proper treatment planning and execution leads to improved esthetic outcome, which helps to enhance confidence of the patient. This article flings glow on benefits and drawbacks of various existing treatment options available for replacement of missing tooth in esthetic zone, which will help the clinician to select the accurate treatment option for a particular intra oral situation. [ABSTRACT FROM AUTHOR]

Objective To evaluate the volumetric changes occurring from prosthesis insertion to the 1-year follow-up (FU) using one- and two-piece dental implants. Methods Sixty patients were randomly assigned to receive one-piece or two-piece implants. Casts were obtained at baseline (insertion of final reconstruction) and at 1 year of loading. Finally, 33 pairs of casts ( BRA = 18, STM = 15) were deemed appropriate for volumetric analysis of the peri-implant tissues. If the patients had more than one implant, one was randomly selected for analysis. Casts were scanned to obtain stereolithography ( STL) files. Baseline and 1-year FU digital models were superimposed with an image analysis program. Linear and volumetric measurements were performed including (i) crown height changes (CHCs), (ii) volumetric changes, and (iii) changes in tissue thickness at three levels below the mucosal margin on the buccal side of the implants (at 1,3, and 5 mm). The Mann-Whitney U-test and the paired t-test were used to analyze the data between the two groups using the patient as the unit of analysis. Results No significant baseline differences were observed between the one- and two-piece groups for the linear measurements. The mean CHCs in the two-piece group amounted to 0.02 mm ( SD ± 0.32), whereas the one-piece group exhibited a change of −0.17 mm (±0.57). The mean volume changes (VCs) were −0.12 mm (±0.27) (two-piece group) and −0.03 mm (±0.29) (one-piece group). With regard to the changes in tissue thickness, the two-piece group presented a change of −0.15 mm (±0.20) at 1 mm, −0.06 mm (±0.20) at 3 mm, and −0.2 mm (±0.51) at 5 mm. The respective values for the one-piece group were −0.03 mm (±0.35), 0.01 mm (±0.28), and −0.01 mm (±0.51) at the three levels. None of the differences in linear measurements between baseline and the 1-year FU reached significance. Positive correlations were seen for tissue thickness changes at 1 and 3 mm for both groups ( P < 0.05). Significant positive correlations were found for VCs and tissue thickness at 1 mm for the two-piece group and for VCs and tissue thickness at 1,3, and 5 mm for the one-piece group ( P < 0.05). Conclusion Within the first year of loading, minimal changes occur with regard to tissue thickness, crown height, and facial volume for both implant types. [ABSTRACT FROM AUTHOR]

Background/Aim. Various luting cements are used to fix dental crowns to prepared teeth, and should provide an adhesive bond to the tooth structure giving reliable retention. The aim of this study was to establish in vitro which type of the tested luting cement provided the strongest adhesive bond of the prepared teeth to the fixed denture. Methods. Testing was carried out on the sample of 100 intact human premolars extracted for orthodontic reasons. The preparation of the teeth was performed by a heavy-duty machine. The surfaces of the prepared teeth were mathematically calculated. Dental crowns from the Nickel-Chromium- Molybenum (Ni-Cr-Mo) alloy were made in a standard fashion, and fixed to prepared teeth (two samples of each group) with 5 different types of luting cements. The strength of force applyed to separate the cast crowns from the prepared teeth was measured by an electronic dynamometer, after 7 days. Results. The obtained results revealed the connection between the type of luting cement and the values of retention power. The best adhesive bond under the constant convergence angle of the prepared teeth was provided by the resin cement. Conclusion. When choosing a luting cement for fixing dental crowns to prepared teeth, the advantage should be given to the resin cement in case the glassionomers are not available.

Aim. To investigate the frequency of discoloration of gingiva in the presence of fixed dental restorations, regarding the type of alloy of which restorations were made, and to show histopathological changes of discolored gingiva. Methods. One hundred and eighty four patients of both sexes were examined. The average age of the examinees was 52. They were divided into four groups according to the alloys from which their restorations were made. Standardized history questionnaires and clinical examination procedures were developed for this study. In ten examinees, whose teeth were indicated for extraction and who had a discoloration of gingiva, the samples of tissue were taken from the discolored gingiva for histopathological examination. Results. Our results showed the presence of discolored gingiva in all four groups. It was most frequent in the examinees with fixed restorations made of Ni-Cr alloy (43,5%) and less frequent in those with fixed dental restorations made of gold alloy (26,5%). Histopathological examination showed the presence of tissue foreign body granulomas with giant cells in which the metal particles were found, partially as small and partially as large particles. Conclusion. Results suggested that grayish discoloration of gingiva was present in all four groups of examinees. The highest number of examinees with discolored gingiva was in the group with restorations made of Ni-Cr alloy. Grayish discoloration of gingiva was a consequence of incorporation of metal particles into gingival tissue.

This paper presents a combined surgical-prosthetic procedure of reconstructing mandibular bone defect in a 53 year old patient, following enucleation of a mandibular cyst (Cystectomy Partsch II). After a thorough diagnostic evaluation, a surgical procedure was planned with the particular attention to the nature of the disease, patient’s condition, size and extension of the cyst, tissue loss, and the possibilities of prosthetic management of a mandibular bone defect with partial postresection dental prosthesis. It is of great importance to point to the significance of teamwork of a maxillofacial surgeon and a specialist in prosthodontics. This kind of cooperation provided very effective and less risky soft tissue, as well as bone tissue regeneration (osteogenesis). The patient’s recovery was fast, and he could return to his daily activities and work without significant changes regarding quality of life after surgery and prosthetic treatment.

Background. The aim of the study was to evaluate the quality and persistance of esthetics of dedicated inlay by clinical methods. Methods. The paper reviews the clinical significance and technique of preparing particular composite inlays before and after the construction of the metallic framework partial denture. On the basis of indications the total of 30 inlays were placed into cavities under relatively dry working conditions. Six, twelve eighteen and twenty-four months after the placement of filling, control check-up was carried out by Ryge criteria. Results. After two years marginal discoloration as well as the change of the colour occured in 3.3% of inlays. There was neither detectable secondary caries, nor the symtoms of pulpal damage. The requirements to be fulfilled concerning the composite materials in order that they can be implemented for this purpose, were also discussed. Conclusion. From the clinical point of view, purpouse inlays from Herculite XRV lab C8B in combination with Opti Bond System and composite cement Porcelite Dual Cure showed high functional and esthetic values in the observational period of two years.

The aim was to make an inventory of the current literature on the clinical performance of tooth- or implant-supported zirconia-based FDPs and analyse and discuss any complications. Electronic databases, PubMed.gov, Cochrane Library and Science Direct, were searched for original studies reporting on the clinical performance of tooth- or implant-supported zirconia-based FDPs. The electronic search was complemented by manual searches of the bibliographies of all retrieved full-text articles and reviews, as well as a hand search of the following journals: International Journal of Prosthodontics, Journal of Oral Rehabilitation, International Journal of Oral & Maxillofacial Implants and Clinical Oral Implants Research. The search yielded 4253 titles. Sixty-eight potentially relevant full-text articles were retrieved. After applying pre-established criteria, 27 studies were included. Twenty-three studies reported on tooth-supported and 4 on implant-supported FDPs. Five of the studies were randomised, comparing Y- TZP-based restorations with metal-ceramic or other all-ceramic restorations. Most tooth-supported FDPs were FDPs of 3-5 units, whereas most implant-supported FDPs were full arch. The majority of the studies reported on 3- to 5-year follow-up. Life table analysis revealed cumulative 5-year survival rates of 93·5% for tooth-supported and 100% for implant-supported FDPs. For tooth-supported FDPs, the most common reasons for failure were veneering material fractures, framework fractures and caries. Cumulative 5-year complication rates were 27·6% and 30·5% for tooth- and implant-supported FDPs, respectively. The most common complications were veneering material fractures for tooth- as well as implant-supported FDPs. Loss of retention occurred more frequently in FDPs luted with zinc phosphate or glass-ionomer cement compared to those luted with resin cements. The results suggest that the 5-year survival rate is excellent for implant-supported zirconia-based FDPs, despite the incidence of complications, and acceptable for tooth-supported zirconia-based FDPs. These results are, however, based on a relatively small number of studies, especially for the implant-supported FDPs. The vast majority of the studies are not controlled clinical trials and have limited follow-up. Thus, interpretation of the results should be made with caution. Well-designed studies with large patient groups and long follow-up times are needed before general recommendations for the use of zirconia-based restorations can be provided. [ABSTRACT FROM AUTHOR]

This study aims to investigate the oral health-related quality of life ( OHRQoL) in a group of removable partial denture ( RPD) wearers in Shiraz (Iran), using the Persian version of the Oral Health Impact Profile ( OHIP-14). Two hundred removable partial denture wearers had completed a questionnaire regarding patients' demographic characteristics and denture-related factors. In addition, the OHIP-14 questionnaire was filled out by interviewing the patients. Two measures of interpreting the OHIP-14 scales were utilised: OHIP-14 sum and OHIP-14 prevalence. The relationship of the patients' demographic characteristics and denture-related factors, with their OHRQoL was investigated. The mean OHIP-14 sum and OHIP-14 prevalence of RPD wearers were 13·80 (±10·08) and 44·5%, respectively. The most problematic aspects of OHIP-14 were physical disability and physical pain. Twenty-seven percentage and 24% of participants had reported meal interruption and eating discomfort, respectively. OHIP-14 prevalence and OHIP-14 sum were found to be significantly associated with factors representing RPD wearer's oral health such as self-reported oral health and frequency of denture cleaning. Furthermore, OHIP-14 prevalence and OHIP-14 sum were significantly associated with factors related to frequency of denture use such as hours of wearing the denture during the day and wearing the denture while eating and sleeping. Therefore, it can be concluded that the OHRQoL of the patients of the study was generally not optimal and found to be strongly associated with oral health. [ABSTRACT FROM AUTHOR]

Copyright of Acta Stomatologica Croatica is the property of Acta Stomatologica Croatica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)