Abstract
Shape change of shape memory alloy (SMA) fiber embedded denture base resin matrix composite after crack healing was discussed. Two types of rectangular composite specimen were prepared : one is a sandwich type specimen with well-aligned SMA fibers and the other is single layer specimen with less-aligned SMA fibers. Specimens were broken by 3 point bending test and heated for shape recovery. They were repaired by a conventional brush up method, and the flexion was measured. The flexions of both types of specimen were approximately 0.1 to 0.2 mm, which indicated this process was expected to be applicable for denture repair. Since the effect of fiber alignment on the flexion after repair was not significant, the process of fiber embedding by hands, a conventional technique in dental field, was not expected to have serious problems for the repair.
