全部床義歯のバレル研磨に関する研究 セラミック研磨材の材質と粒径が表面性状に及ぼす影響

Abstract

The purpose of this study was to investigate the surface texture and the cutting depth of denture base resin after barrel finishing, in association with the component and the particle size of the ceramic polishing materials. Board-shaped specimens were provided to examine the surface texture, and cylindrical specimens were provided to measure the cutting depth. The test surface of the board-shaped specimens were polished with a rag wheel and polishing material (0.05 pm aluminium oxide powder) before barrel finishing. The test surface of the cylindrical specimens were polished in the same manner, and then the polished surface was masked with adhesive tape except for a circular hole which was five millimeters in diameter. The barrel finishing was performed for twenty minutes with six kinds of ceramic polishing materials respectively. After barrel finishing, the surface texture and the cutting depth were measured with a surface texture measuring apparatus. Then the specimens were observed under a scanning electron microscope. The results were as follows:1. As the diameter of ceramic polishing materials increased, the value of the surface roughness and the cutting depth increased.2. The surface texture of denture base resin was influenced by components of polishing materials when the diameter of the ceramic polishing material was 2 or 4 mm.3. The cutting depth of the denture base resin was not influenced by components of polishing materials.