Retrospective evaluation of extended heat-pressed ceramic veneers after a mean observational period of 7 years.

Abstract

Retrospective evaluation of extended anterior glass-ceramic veneers 7 years after placement in a private practice. A total of 31 patients (20 females/11 males) underwent restoration with adhesively luted extended veneers that were fabricated using heat-pressed glass-ceramic (Cergo, Dentsply Sirona). A single dentist restored 101 teeth (maxilla, n = 65; mandible, n = 36). Adhesive cementation was performed using an etch-and-rinse adhesive (OptibondFL, Kerr Corporation), and two different dual-curing composite cements (Variolink, Ivoclar Vivadent/Calibra, Dentsply Sirona). After 7 years, the Kaplan-Meier survival rate (in situ criteria) was 93.6% (95% CI: 0.89; 0.98). The observed failures were caused by ceramic fractures for seven restorations and biological failure for one restoration. In total 80 of the 101 restorations were still in service and did not require any clinical intervention (7-year success rate: 84.3% [95% CI]: 0.76; 0.93). Interventions were necessary in 13 cases (8 recementations, 2 endodontic treatments, 2 composite fillings (caries), and 1 polishing of minor fractures). The clinical performance was not influenced by the veneer position (maxilla/mandible, survival P = .56/success P = .30). The veneers that covered large areas of exposed dentin (>50%) exhibited a significantly increased risk (hazard ratio 3.71, P = .0041) for requiring a clinical intervention; however, no effect on the survival rate was observed for these veneers (P = .35). Following 7 years of clinical service, extended anterior ceramic veneer restorations exhibited comparable survival and success rates for the upper and lower jaw. Large areas of exposed dentin (>50%) were associated with significantly lower success rates. Dentin exposure (more than 50% of the preparation surface) during preparation significantly affects the clinical performance of extended heat-pressed glass-ceramic veneers.