臨床疫学調査からみた接着技法の臨床効果

抄録

Adhesive luting cement for restorative and prosthetic procedure has been used in our department since 1980 because its use was expected to contribute to decreasing the marginal leakage between tooth and prosthesis and resultantly increasing the longevity of teeth. In this study, the survival rate of resin and cast posts and cores, conventional crowns and bridges, and resin-bonded fixed bridges were investigated by the Kaplan-Meier method in randomly selected patients who had been treated in our department for 15 years from April 1982 to February 1997. The 15-year survival rates were 86.7% for resin posts and cores, 80.1% for full coverage crowns, 59.8% for bridges, and 59.8% for resin-bonded fixed bridges including early ones which showed a high frequency of dislodgment. The survival rate of resin-bonded bridge increased to 90.1% if it was refabricated. These results suggested that the use of adhesive luting resin contributed both to increasing the longevity of teeth and to conservation of abutment teeth.