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US5863201A Infection-blocking dental implant 失效
感染阻塞牙种植体

Infection-blocking dental implant
摘要:
An infection-blocking dental implant in which a threaded portion which contacts bone is roughened except for up to three threads which may be exposed by bone recession after implantation, which have a smooth surface. Preferably, the implant is of titanium or titanium alloy and the threaded portion is roughened by a two-step acid treatment.
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