Background This study aimed to demonstrate that the material of the occlusal splint can be chosen according to the needs of individual patients and contribute to the knowledge of the wear rate of these materials. Methods In this study, four occlusal splint materials (Sr Ivocap Heat Cured, Valplast, SR Ivocap Elastomer and Eclipse) and three antagonists (natural tooth enamel, inCoris TZI and IPS e.max Press ceramic materials) were used. Each wear test was performed using a chewing simulator (n = 16; test load: 50 N; number of cycles: 10,000, 20,000 and 30,000; continuous rinsing with water at 30 °C for the wet condition). The Shapiro Wilk test was used for normal distribution suitability. Antagonist on average wear quantities both main effects and interactions of material, cycle and condition factors were investigated by Univariate variance analysis. Multiple comparisons were examined using the Games-Howell test. Results There was a statistically significant effect of the difference in materials on the amount of wear (p < 0.001). Furthermore, there was a statistically significant difference among the mean values of all materials (p > 0.001). The highest mean value was obtained with Eclipse (0,318 μm3), and the lowest mean value was obtained with Valplast (0,134 μm3). Conclusion Our study found differences in the in vitro wear rate among various occlusal splint materials.

Objectives: To evaluate the survival rate, failure, and clinical quality of all ceramic Onlay restorations retrospectively. Methods: Restorations placed during the period September 2010 - April 2021 at Marmara University Dentistry Faculty Department of Prosthodontics were included. Patients with parafunctional habits were excluded from the study. In 62 patients, 115 onlay restorations were examined. The number of restoration failures and reasons for failure was recorded. The remaining onlay restorations were evaluated by CDA criteria (color match, anatomical form, marginal discoloration, marginal integrity, and surface texture) by two clinicians after 1–12 years. Patients also evaluated their restorations in five categories (color, surface, fonation, hygiene, and bite efficiency) on a scale of 1–10. Results: A survival rate of 87.9 % was recorded. 14 (12.1%) of the 115 restorations had to be replaced. The main reasons for failure were 7 ceramic fractures (6.0%), 6 decementation (5.2%), four endodontic treatment needs (4.3%) and 2 extensive restoration needs (1.7%), 1 tooth fracture (0.8%). Conversely, patient satisfaction score was founded mostly over 8 and none of the patients rated under 3. Conclusions: All ceramic Onlay restorations are an acceptable and predictable treatment alternative in general dental practice. In addition, the location of teeth in the dental arch and marginal integrities of teeth influenced restoration failures directly. Clinical Significance: All ceramic Onlay restorations show a good clinical performance for up to 11 years.

Background: This study aimed to demonstrate that the material of the occlusal splint can be chosen according to the needs of individual patients and contribute to the knowledge of the wear rate of these materials.Methods: In this study four occlusal splints materials (Sr Ivocap Heat Cured, Valplast, SR Ivocap Elastomer and Eclipse were selected. As antagonist materials natural tooth enamel, inCoris TZI and IPS e.max Press ceramic materials were used. Each wear test was performed using a chewing simulator (n=16; test load: 50 N; number of cycles: 10,000, 20,000 and 30,000; continuous rinsing with water at 30°C for the wet condition).Results: There was a statistically significant effect of the difference in materials on the amount of wear (p < 0.001). Furthermore, there was a statistically significant difference among the mean values of all materials (p > 0.001). The highest mean value was obtained with Eclipse (0,318 mm3), and the lowest mean value was obtained with Valplast (0,134 mm3).Conclusion: Our study found differences in the in vitro wear rate among various occlusal splint materials.