[Relationship between graft polymerization onto model peptide and adhesion of MMA-TBB resin to dentin (3) Effect of grafting on mechanical properties of peptide].

MMA grafted silk fibers were prepared by graft polymerization initiated by TBB, as a collagen model. The loop strength of the fiber was measured to investigate the relationship between grafting and the adhesion of resin to dentin. The loop strength of the grafted fiber decreased with increases in the degree of grafting since the crystal structure of the silk was destroyed by the process. As for adhesion of resin to dentin by graft polymerization of MMA onto collagen, graft polymerization strongly influences the tensile bond strength of the resin to dentin because of weakening of the collagen.