PROBLEM TO BE SOLVED: To provide a zirconium alloy that is low in elastic modulus, and a bone anchor that prevents the occurrence of stress shielding.SOLUTION: A zirconium alloy comprises Nb of 8 mass% or more and 11 mass% or less, and at least one of Sn and Al of 1 mass% or more and 5 mass% or less in total, with the balance substantially being Zr, where an αphase is the main phase. There is also provided a bone anchor comprising the zirconium alloy.COPYRIGHT: (C)2016,JPO&INPIT【課題】弾性率が低いジルコニウム合金、及びストレスシールディングが発生しにくい骨固定具を提供する。【解決手段】Nbを8質量%以上11質量%以下含有し、Sn及びAlの少なくともいずれかを合計1質量%以上5質量%以下含有し、残部が実質的にZrであり、α’相を主相とするジルコニウム合金、及び該ジルコニウム合金からなる骨固定具。【選択図】なし
