| 摘要 |
A dental implant includes a crown socket; an abutment; and an implant body having a shank that includes a threaded portion and a narrowing portion for increasing an offset distance to a tooth root adjacent to the implant body, the narrowing portion having an absence of threads. In another embodiment, a dental implant includes an implant body having a threaded tip portion distal from the abutment, a shank portion between the tip and the abutment, the shank portion having an unthreaded portion and a threaded portion in one cross-section through the shank portion.
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