| 摘要 |
<p>A dental tool (10) is disclosed having a hollow cylindrical body portion (12), with an enlarged angular ring (14) at one end, said ring having an abrasive coating thereon. The size and configuration of the enlarged annular ring allows the tool to be used to undercut the tooth surfaces in various ways, thereby allowing new methods in the securing of dental prostheses to existing teeth or to the jaw itself, or to the augmentation, or grafting, of bone material to reinforce a tooth, including (a) the creation of an undercut groove (26) at the base of a prepared tooth into which a gasket can be positioned to form a seal with the dental prosthesis, (b) the drilling of annular or cylindrical cavity with an undercut portion in a tooth or jaw bone into which a shaped insert (32) can be securely mounted, which insert can act as a mounting for a dental prosthesis, and (c) harvesting a core (82) or plug of bone material from a jaw bone, crushing the harvested bone and implanting said harvested bone around a tooth situated in the same jaw as the crushed bone was harvested, as bone augmentation procedure to strengthen said tooth.</p> |
