Telescoping bone screw

摘要

A bone screw for treating a bone fracture having a plunger assembly and a detent assembly on a body portion thereof. The detent assembly includes a detent member that is movable between a first and second position. The plunger assembly includes a threaded engagement portion and a plunger portion. The plunger portion is slidably disposed within a chamber of the body. The detent assembly operative to secure the body whereby said plunger portion moves independent of said body.

主权项

1. An apparatus for repairing a bone fracture comprising:
a body, said body having a socket formed in one end thereof; a plunger assembly, said plunger assembly including a plunger member disposed in said socket and moving independently of said body; and a detent member located on said body, said detent member movable between a first and a second position wherein positioning said detent member in said second position operates to secure said body from movement relative to a bone nail; said second position of said detent member includes at least a portion of said detent member radially displaced and extending outwardly above an outer surface of said body; and said detent member includes an outer surface, said outer surface configured to engage the bone nail, said outer surface having an irregular configuration to increase a holding force and correspondingly reduce movement of the body with respect to the bone nail.