title: Reliability estimation for single-unit ceramic crown restorations.
abstract: The objective of this study was to evaluate the potential of a survival prediction method for the assessment of ceramic dental restorations. For this purpose, fast-fracture and fatigue reliabilities for 2 bilayer (metal ceramic alloy core veneered with fluorapatite leucite glass-ceramic, d.Sign/d.Sign-67, by Ivoclar; glass-infiltrated alumina core veneered with feldspathic porcelain, VM7/In-Ceram Alumina, by Vita) and 3 monolithic (leucite-reinforced glass-ceramic, Empress, and ProCAD, by Ivoclar; lithium-disilicate glass-ceramic, Empress 2, by Ivoclar) single posterior crown restorations were predicted, and fatigue predictions were compared with the long-term clinical data presented in the literature. Both perfectly bonded and completely debonded cases were analyzed for evaluation of the influence of the adhesive/restoration bonding quality on estimations. Material constants and stress distributions required for predictions were calculated from biaxial tests and finite element analysis, respectively. Based on the predictions, In-Ceram Alumina presents the best fast-fracture resistance, and ProCAD presents a comparable resistance for perfect bonding; however, ProCAD shows a significant reduction of resistance in case of complete debonding. Nevertheless, it is still better than Empress and comparable with Empress 2. In-Ceram Alumina and d.Sign have the highest long-term reliability, with almost 100% survivability even after 10 years. When compared with clinical failure rates reported in the literature, predictions show a promising match with clinical data, and this indicates the soundness of the settings used in the proposed predictions.
authors.affiliation: Bursa Technical University, Department of Mechanical Engineering, Gaziakdemir Mah. Mudanya Cad. No: 4/10 Osmangazi, Bursa, Turkey huseyin.lekesiz@btu.edu.tr.
authors.forename: H
authors.initials: H
authors.lastname: Lekesiz
mesh_terms: D000465:Algorithms; D002516:Ceramics / Q000737:chemistry; D003442:Crowns / Q000706:statistics & numerical data*; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry*; D019232:Dental Restoration Failure / Q000706:statistics & numerical data; D003801:Dental Veneers; D055119:Elastic Modulus; D020342:Finite Element Analysis; D005544:Forecasting; D006801:Humans; D016876:Metal Ceramic Alloys / Q000737:chemistry; D015203:Reproducibility of Results; D013314:Stress, Mechanical; D016019:Survival Analysis
chemical_list: D003738:Dental Cements; D016876:Metal Ceramic Alloys; D003776:Dental Porcelain; C023506:Glass ceramics
keywords: CAD; biomechanics.; finite element analysis (FEA); restorative materials; statistics; stress analysis