PROBLEM TO BE SOLVED: To provide an external fixator which has a small number of components and simple structure and furthermore enables a joint to be separated and articular cartilage lesion to be treated.SOLUTION: The external fixator 10 includes a pin 12a attached to a bone part B and pins 12b, 12c attached to a bone part C. A first magnet part 14 including a first permanent magnet 20 is attached to the pin 12a. A second magnet part 16 including a second permanent magnet 28 is attached to the pins 12b, 12c. The first magnet part 14 has a projection part 14a whose cross section orthogonal to the longitudinal direction of the pin 12a is of an arch and projecting shape. The second magnet part 16 has a recessed part 16a whose cross section orthogonal to the longitudinal direction of the pins 12a, 12c is of an arch and recessed shape.The first magnet part 14 and the second magnet part 16 are arranged in such a manner that the projection part 14a faces the recessed part 16a, and the same poles of the first permanent magnet 20 and the second permanent magnet 28 face each other.COPYRIGHT: (C)2012,JPO&INPIT【課題】部品数が少なく構造が簡単でありながら、関節を離間させて関節軟骨損傷の治療を行うことができる、創外固定器を提供する。【解決手段】 創外固定器10は、骨部Bに取り付けられるピン12aと、骨部Cに取り付けられるピン12b,12cとを含む。第1永久磁石20を含む第1磁石部14がピン12aに取り付けられる。第2永久磁石28を含む第2磁石部16がピン12b,12cに取り付けられる。第1磁石部14は、ピン12aの長手方向に直交する断面が円弧かつ凸状の凸部14aを有し、第2磁石部16は、ピン12b,12cの長手方向に直交する断面が円弧かつ凹状の凹部16aを有する。第1磁石部14と第2磁石部16とは、凸部14aと凹部16aとが対向しかつ第1永久磁石20および第2永久磁石28の同極が対向するように配置されている。【選択図】図1
