The substance section which possesses the 1st and 2nd joint element which motion possibly is mutually connected (14) it has around one time driving axle core, the eye hole which possesses opening in order the proximal dactylopodite bone and/or the anchor component for fixing to distal (2036) dactylopodite bone (30 and 32) the respective extending facilities is done in 1st and 2nd joint element, in order these anchor components (30 and 32) to accept the fixed screw (40, 42 and 44) structural stability of the finger joint revision and supplementation tool which is provided to improve, as for 1st joint element opening for insertion(22) outside possessing, it has the hollow body, 2nd joint element has the inside hollow body, the inside hollow body opening for insertion (22) through regarding revision and supplementation tool installation state, relative time motion it is insertion arrangement possible possibly to inside the outer part hollow body and also, inside the inside hollow body the spindle (48) is insertion arrangement possible for relative time dynamic possible connection with the outer part hollow body.一つの回動軸心回りで枢動可能に相互連結された第1と第2の関節エレメントを有する本体部(14)を備え、第1と第2の関節エレメントには近位指節骨及び/又は遠位指節骨への固定用アンカー部材(30, 32)がそれぞれ延設され、これらアンカー部材(30, 32)には固定ネジを受け入れるための開口を有する目穴部(40, 42, 44)が設けられている指関節補綴具の構造安定性を向上するため、第1の関節エレメントは挿入用開口(22)を有する外側中空体を備え、第2の関節エレメントは内側中空体を備え、補綴具装着状態においては、内側中空体が挿入用開口(22)を介して外側中空体の内部へ相対回動可能に挿入配置可能であると共に、内側中空体の内部に外側中空体との相対回動可能な連結のためにスピンドル(48)が挿入配置可能である。
