PROBLEM TO BE SOLVED: To provide a bone nail for the heel, which improves a process of insertion of the nail into an arc-shaped bore formed in the bone material, or which improves the long-term stability and the integration of the implant within the bone tissue involved.SOLUTION: A bone nail 1 for the heel comprises: a front portion 2 determined for insertion into one or more bones or bone fragments of the heel and having a tip 3； and an arc-shaped main portion 4 extending from the front portion 2 and having a rear end 5. In the bone nail, the main portion 4 includes a tapered shape such that a cross sectional diameter of the main portion 4 within at least one first section increases towards the rear end 5. According to an embodiment, a curvature of the arc-shaped main portion 4 includes a curvature radius rof at least 130 mm.【課題】踵用の骨釘を、骨材に形成されている円弧状のボア内に挿入する処理を向上させる、または係る骨組織内でのインプラントの長期の安定性および統合を向上させる、踵用の骨釘を提供する。【解決手段】踵用の骨釘１は、踵の１つ以上の骨または骨片を挿入するために定められ、先端３を有する前部２と、前部２から延在し、後端部５を有する円弧状の主要部４とを備える。主要部４は先細り形状を含み、少なくとも１つの第１の部分内では主要部４の断面径は後端部５に向かって増加する。実施の形態に従い、円弧状主要部４の湾曲は、少なくとも１３０ｍｍの曲率半径>；を含む。【選択図】図１
