Development of Rubber-bonded Diamond Polishing Tool for Dental Ceramics

近年来，随着人们对冠修复体美学要求的提高，各种口腔材料应运而生，应用于嵌体或全冠修复。其中，牙科瓷在美学满意度、防腐、耐磨等方面都是有效的，在生物相容性方面也特别有效。修复体制作过程中的抛光是一道非常重要的工序，既要满足生理卫生要求，又要满足美学要求。众所周知，陶瓷等硬脆材料的表面完整性可能会影响其强度。也有类似的报告提到牙科陶瓷。牙科陶瓷是一种硬脆材料，属于牙科陶瓷的一部分。抛光技术对提高其平面度精度具有重要意义，同时由于其强度的不断提高，迫切需要发展抛光技术。顺便说一句，目前聚晶金刚石主要作为松散的磨粒使用，对于高硬度陶瓷等难加工材料的高精度加工是非常有效的。因此，在本研究中，使用尚未用作粘结磨料的聚晶金刚石作为牙科技术砂轮开发的新途径。这个轮子与单晶钻石进行了对比，单晶钻石通常用作粘结磨料。在砂轮方面，为了临床应用，研制了橡胶结合剂金刚石砂轮，用于抛光牙科瓷器。本研究的目的是获得与传统牙科陶瓷釉面相同的光泽度，以适应临床需要。

Recently, as the demand for aesthetic satisfaction in crown restoration, various dental materials are developed, which are applied to inlay or crown. Among them, dental porcelain is efficient in terms of aesthetic satisfaction, corrosion control, and withstanding wearing, and also especially efficient at biocompatibility. Finishing polish at making process of crown restorations is a very significant process in order to meet physiological and hygienical requirement, as well as for aesthetic satisfaction. Hard brittle materials such as ceramics are generally known that its surface integrity may affect its strength. There are similar reports referring to the dental ceramics. Dental porcelain which is a part of dental ceramics is a hard brittle material. Since polishing technology is important for enhancing its accuracy of flatness, also because of its increasing strength, development of its technology is urgently required. By the way, currently, poly-crystalline diamond which is efficient at high-precision machining of difficult machining materials such as high hardness ceramics is mainly used as loose abrasive grain. Therefore, in this study, as a new approach to development of wheels for dental technique, poly-crystalline diamond which has not been used as bonded abrasive is used. And this wheel was weighed against mono-crystalline diamond which is conventionally used as bonded abrasive. Regarding wheels, for the purpose of clinical appliance, rubber bonded diamond wheels is developed, and polish dental porcelain. The purpose of this study is to obtain the glossy surface equal to glazed surface of dental porcelain which is conventionally adapted to clinical appliances.