Bone screw system and method

摘要

An improved bone screw is disclosed which includes a shaft with distal portion having a threaded surface thereon, a sleeve having an opening which receives the shaft such that the shaft is able to move within the sleeve without moving the sleeve. A compressive device may be incorporated between the sleeve and the proximal portion of the shaft such that the compressive device forces the shaft and sleeve towards at least a portion each other, thereby maintaining the compressive load at the union of the fracture. As additional compression is exerted on the load from weight bearing, the force may be reduced, but the head of the sleeve is still substantially maintained against the lateral cortex.

主权项

1. A fracture compressive system comprising:
a sleeve comprising a proximal sleeve portion and a distal sleeve portion; a shaft comprising a distal shaft portion, a proximal shaft portion, and a body portion; and a compressive device engaged between the sleeve and the shaft, wherein the sleeve is configured to contact a first bone portion, wherein an exterior of the distal shaft portion is configured to anchor into a second bone portion, wherein the proximal shaft portion of the shaft is received within the sleeve such that shaft and sleeve move longitudinally relative to one another, wherein the shaft is configured to limit the outward longitudinal movement of the shaft and wherein the shaft is configured to limit the inward longitudinal movement of the shaft.