The instrument which is used with joint substitution disposal. As for this instrument, it possesses the bore which is formed to the surface, and the underside which are decided by the curve aspect, it corresponds to the head of the joint component for the orthopedics, trial head 162 is included. The trial connector 164 where as for the instrument, it is intended, connects trial head 162 to the stem part 12 of the joint component for the orthopedics that it is categorized to the medulla lumen of the bone, furthermore is included. It inserts trial connector 164, into the bore of trial head 162 with variable angular direction and can you be packed. As for the instrument, the rotary indicator 174 which revolution possibly is connected furthermore is included around the polar axis of the trial head 162 which is decided by the curve surface, rotary indicator 174 is connected by trial connector 164, rotary position of rotary indicator 174 around the polar axis, shows the rotary position of the trial connector 164 inside the bore of trial head 162. The bore in the underside of trial head 162 eccentricity has done from the polar axis, trial connector the terminal area with the stem parts 12 of 164 and the joint component for the orthopedics eccentricity has done from the center of trial connector 164. The position where the top of rotary indicator 174 is decided beforehand trial connector confronts the terminal area with stem 12 of 164 and the component for the orthopedics, largest eccentric direction of trial head 162 is shown. This instrument and the head part 20, the stem part the joint component for the orthopedics which includes 12 and the connector sleeve part 30 and, it includes, also the assembly body is disclosed.関節置換処置で使用される器具。この器具は、湾曲面により定められる上面、および下面に形成されるボアを有する、整形外科用関節構成要素のヘッドに対応する、トライアルヘッド162を含む。器具は、骨の髄内腔に位置することが意図される、整形外科用関節構成要素のステム部分12にトライアルヘッド162を接続するトライアルコネクタ164をさらに含む。トライアルコネクタ164は、可変角度方向でトライアルヘッド162のボアに嵌め込まれ得る。器具は、湾曲上面により定められるトライアルヘッド162の極性軸の周りに旋回可能に連結される回
