6-year clinical performance of prefabricated and clear template-formed resin composite veneers

This study aimed to evaluate the clinical performances of prefabricated and direct resin composite veneers used for diastema closure and tooth reshaping over a period of 6 years.

21 patients (1 male, 20 females; mean age: 35) received a total of 74 anterior restorations. Group 1 was treated with Edelweiss prefabricated veneers (10 patients, 38 teeth) while Group 2 received Ceram-X Duo SphereTec resin composite using U-veneer clear templates (11 patients, 36 teeth). All procedures were performed according to manufacturer's instructions without further mechanical polishing. The veneers were evaluated at baseline, 1, 2, 4, and 6 years by two blinded examiners using modified USPHS criteria. Statistical analysis was performed with Chi-square and Cochrane Q tests (p < 0.05).

Seven patients for the Edelweiss group and eight for the direct resin composite veneer group were evaluated after 6 years. Both techniques were clinically successful/sufficient. Slight polishing loss after the first year was visible in the direct group (p < 0.05). Direct composites showed more marginal discoloration and chipping, while two Edelweiss cases had repairable partial fractures.

Despite their slight polishing loss over the years and local marginal discolorations/chipping, prefabricated resin composite veneers and direct resin composite veneers performed with U-veneers were found to be successful after 6 years. However, prefabricated resin composite veneers can be applied in less time and can offer esthetic advantages for smokers and heavy coffee drinkers.

Long-term effectiveness was possible with direct and semi-direct resin composite veneer techniques. However, fine polishing and maintenance were needed after yearly recalls for achieving persistent esthetic results especially for direct resin composite veneers.