| 摘要 |
PURPOSE:To enable to grind a dental restorative material uniformly and inexpensively, by a method wherein the dental restorative material is placed in a barrel together with a specified abrasive and a luster detergent, and rough grinding, intermediate finishing grinding and polishing grinding are sequentially conducted. CONSTITUTION:First, rough grinding is conducted by an abrasive containing 40- 80wt% of alumina and 20-60wt% of silicon dioxide and having a particle size of not larger than 60mm. and the luster detergent. Next, intermediate finishing grinding is conducted by an abrasive comprised mainly of alumina and having a particle size of not larger than 3mm. and the luster detergent. Finally, finishing grinding is conducted by an abrasive formed from cores of corn or walnut shells and having a particle size of not larger than 6mm.. |
