Long-term clinical evaluation of cervical composite resin restorations treated with the self-etch bonding system

Abstract

The purpose of this study was to evaluate the long-term periodic changes of marginal adaptation of cervical composite resin restorations. Class V saucer type cavities or cervical cavities were prepared on the labial or buccal surfaces of vital human incisors, canines, premolars and molars. A total of 124 restorations were placed to 40 patients (13 males and 27 females) by one operator. Two self-etch bonding systems were used in this study. Clinical findings of these fillings were periodically observed. In order to observe the marginal adaptation, impressions of these restorations were taken and precision replicas were made. These replicas were observed by scanning electron microscope. In the Fluoro bond group (Shofu, Kyoto, Japan) and Mega bond group (Kuraray, Okayama, Japan), maximum observation period is 4,582 days. In many cases of enamel and enamel dentin margin cavities, marginal steps were observed after 1 year. The widths of steps were extended with time. Three dislodged cases were observed in Fluoro bond group and two dislodged cases were observed in Mega bond group during 10 years.