Abstract
Objective: Recently crown and bridge resins containing high concentrations of filler (high-filler resins for crowns and bridges) were developed to achieve high abrasion resistance. The purpose of this experiment was to evaluate the abrasion resistance of high-filler-containing resin for crowns and bridges.
Methods: To evaluate the toothbrush abrasion of resin for crowns and bridges, water absorption, volume of abrasion, abrasion resistance, and surface roughness were determined.
Results: 1. Water absorption was increased in the order of belleGlass HP dentin (BD), belleGlass HP enamel (BE), and Gradia dentin (GD)≅Gradia enamel (GE), (p<0.01, t-test). 2. The amount of abrasion was increased in the order of BE and GE (Enamel Body)(p<0.01, t-test), BD and GD (Dentin Body)(p<0.01, t-test). 3. In evaluation, abrasion resistance was increased in the order of BE, BD, GE and GD. There was a significant difference between BE and GE (BE<GE), and between BD and GE (BD<GE)(p<0.01, t-test). 4. The surface roughness at the end of the experiment was increased in the order of BE, GD, BD, and GE. There was a significant difference between BE and GD (p<0.05, t-test).
Conclusions: The above results indicated that high-filler resins for crowns and bridges had various worn surface and abrasion resistance. We thought that was necessary to evaluate the toothbrush abrasion of resin for crown and bridge more clinical condition.
