Clinical performance of porcelain laminate veneers. A retrospective evaluation over a period of 6.5 years.

Three-hundred and seventy-two porcelain laminate veneers were fitted to defective and discoloured teeth in 102 patients. Ninety per cent of the restorations were fitted to unprepared teeth. Restorations were reviewed up to 78 months after cementation. Survival probabilities were calculated using the Kaplan-Meier method. Results showed higher rates of failure and problem development in veneers fitted over existing restorations and in those fitted by inexperienced operators. A considerable number of veneers suffered minor problems that were successfully repaired.