歯科用研磨法の効率化に関する研究

提高牙齿抛光方法效率的研究

• 批准号: 14771083
• 负责人: 石川 香
• 金额: $ 2.24万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14771083/
• 关键词: 研磨; 表面粗さ; 光沢度; 義歯床用レジン; 研磨剤; 衝突角度; 遠心力; 義歯床形態; 床用レジン; 研磨材; 効率

我々は,義歯などの各種補綴装置の製作過程において,従来から行われている回転切削工具による研磨操作に代わるものとして,遠心力を利用して研磨材を発射する研磨システム(遠心発射型研磨装置)を開発した.このシステムで使用する研磨材の構成の違いと試料に対する研磨材の衝突角度の違いが,義歯床用レジンの表面性状に及ぼす影響について検討を加えた.まず,研磨材を構成するコアの性状と表面に付着させる研磨砥粒を変え4種類の研磨材を製作した.これらを使用して,研磨材を衝突させる角度を30,45,60度の3種類設定し,義歯床用レジン試料の研磨操作を行った.研磨の評価として,表面粗さ形状測定機を使用し表面粗さ(Ra)と削除量を,また光沢度計を使用し光沢度(GS60°)を測定した.その結果,研磨材の衝突角度が30度に設定した場合において良好な表面性状が得られた.また,上顎義歯口蓋部の形態を半径20mmの円弧状に想定し,義歯床形態を模した曲面型試料を製作し,この試料の凹面と凸面の表面に対し,研磨材の衝突角度を接線に対して30度として研磨を行い,その表面粗さと削除量について検討した.その結果,平板型試料では,衝突点に近い10mm地点,20mm地点,凹面では10mm地点,20mm地点,30mm地点の各測定点間に表面性状の有意差はみられなかったが,それより遠い点で,表面粗さは有意に大きく,削除量は有意に小さい値を示した.一方,凸面では,10mm,地点に比べ20mm地点の表面粗さは有意に大きい値を示した.その結果,60秒間の研磨によって凹面では,平板型試料と同等の表面粗さと削除量が得られた.一方,凸面では,さらに60秒間延長することにより,同等な表面粗さが得られた.これらのことから,術者が補綴装置の形態を考慮した上で,適切な角度で保持し,必要な時間研磨を行うことで,作業時間も大幅に短縮し,効率的に研磨が行えることが示された.

We have made sure that all kinds of equipment are used in the process, and that the cutting tools are used to improve the grinding operation, and the center force is used to open the grinding machine (center injection grinding device). The abrasive material is used to form the abrasive material, the protruding angle of the abrasive material, the surface properties and the surface properties of the bed. On the surface of the abrasive material, the abrasive material has the same properties as the abrasive material. The tool is used in the machine, and the grinding angle of the grinding material is 30, 45, 60 degrees and 3 degrees, and the grinding machine is used for the grinding operation. The surface roughness shape measuring machine is used to measure the surface roughness (Ra), and the surface roughness meter is used to measure the surface roughness (GS60 °). According to the results of the test, the abrupt angle of the abrasive material was set to 30 degrees, and the surface properties of the abrasive materials were good. In this section, the shape radius 20mm arc shape is defined, the bed shape mold is defined, the curved material is made, the material is concave, the convex surface is worn, the abrasive material is cut, the contact angle is 30 degrees, the grinding line is cut, and the surface roughness is cut. The results showed that the flat material, the bulge point near the 10mm location, the 20mm location, the concave 10mm location, the 20mm location, the 30mm location, the surface properties of each point, the surface properties, the surface properties, the surface roughness, the surface properties, the surface On one side, the convex surface is 10mm, the location is thicker than the 20mm location, the surface is intentionally larger, the surface is larger, and the location is larger. The results show that after 60 seconds of grinding, the concave surface is fine, and the flat material is the same as the surface roughness. On one side, the convex surface is worn, and the temperature is extended for 60 seconds, and the surface is as rough as it is. In order to improve the performance of the equipment, the shape of the equipment is high, the cutting angle is maintained, the grinding time is necessary, the operating time is greatly reduced, and the efficiency of the grinding machine is displayed.