A Retrospective Study of All-Ceramic Onlay Restorations

Abstract

Abstract 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.