PROBLEM TO BE SOLVED: To provide an improved bone anchor that is especially useful for application to a bone weakened due to osteoporosis.SOLUTION: A bone anchor comprises an anchor member 1 that includes: a first open end 11 a second end 12 a tubular section between the first end 11 and the second end 12 a longitudinal axis L extending from the first end to the second end and a bone engaging structure 16 for engaging at least a portion of the tubular section with a bone. The anchor member 1 is made of a first material. Furthermore, the bone anchor comprises a core member 2 that includes a first end 21 and a second end 22, and is capable of being inserted into and connected with the anchor member. The core member 2 is made of a second material different from the first material.COPYRIGHT: (C)2014,JPO&INPIT【課題】弱くなった骨粗鬆症骨への適用に特に有用な、改良された骨固定具を提供する。【解決手段】骨固定具は、開いた第1の端部11と、第2の端部12と、第1の端部11および第2の端部12の間の管状セクションと、第1の端部から第2の端部まで延びる長手方向軸Lと、管状セクションの少なくとも一部において骨を係合させるための骨係合構造16とを有する固定具部材1を備え、固定具部材1は第1の材料でできており、骨固定具はさらに、第1の端部21と第2の端部22とを有し、固定具部材に挿入可能かつ接続可能なコア部材2を備え、コア部材2は、第1の材料とは異なる第2の材料でできている。【選択図】図1
