Bone screw, method for manufacturing the bone screw, and tool for mounting and removing the bone screw

摘要

A bone screw includes a front portion, a rear portion, and a shaft portion. The shaft portion is fixedly joined to the front portion and the rear portion, so as to form an integral bone screw. The Young's modulus of the shaft portion is smaller than that of the front portion and that of the rear portion.

主权项

1. A bone screw, comprising:
a front portion and a rear portion; and a shaft portion, fixedly joined to said front portion and said rear portion, so as to form an integral bone screw, wherein the Young's Modulus of the shaft portion is smaller than that of the front portion and that of the rear portion; wherein said front portion, said shaft portion and said rear portion being all hollow inside and in communication with each other, said rear portion comprising a polygonal hole located at a central line of said rear portion, whereby a hollow screw driver is adapted to be inserted into the polygonal hole, and a guide needle is adapted to pass through a through hole of the hollow screw driver and the polygonal hole; and
the shaft portion is made of a polymer material, and the front portion and the rear portion are made of a biomedical metal material.