| 摘要 |
<p>An implant for placement into bone and method for forming the same. The method provides an implant that has an elongated body that has a distal end and a proximal end. The method also provides a thread-cutting tool. The process engages the elongated body with the thread-cutting tool. The thread-cutting tool contacts the elongated body at the proximal end and removes material from the implant to form a thread and a tapered portion near the distal end of the elongated body. The thread-cutting tool forms the thread and a generally-cylindrical portion between the tapered portion and the proximal end of the elongated body. The thread has first crest width in the tapered region and a second crest width in the generally-cylindrical portion. The thread-cutting tool contacts the thread in the generally-cylindrical portion of the elongated body. The thread-cutting tool makes a second pass to reduce the second crest width.</p> |
