Two-year clinical evaluation of Dyract in small Class I cavities

Abstract

Purpose: To evaluate the 2-year clinical performance of Dyract in small Class I cavities in non stress-bearing areas. Materials and Methods: On 36 patients, 87 small cavity preparations were performed. The lesions were diagnosed macroscopically with a probe. They involved fissures, were shallow and had reached dentin but the lateral spread was limited and localized in dentin. Cavities were designed to be on non stress bearing areas. Cavities' average faciolingual widths were prepared to be 1/3 or less than the intercuspal width. At baseline, 1- and 2-year recalls, the restorations were evaluated according to the modified Ryge criteria by two calibrated, experienced examiners. Results: None of the restorations was lost and retention rate was 100% at the end of 1 year. After 2 years, one restoration (1.1%) had to be replaced due to caries lesion adjacent to its margin and the rate of retention was 98.9%. At the 2-year recall, marginal discoloration (rated Bravo) was observed in 19.8% of the restorations but did not require the replacement of any restorations. Except the failed restoration, no other was clinically unacceptable in regard to color match, wear or loss of anatomic form, marginal discoloration, caries, marginal adaptation and surface texture.