Nakashima Propeller Co., Ltd.

Other

Keio University

Nakashima Healthforce Co., Ltd.

Ikegami, Hiroyasu

Keitaro Yamamoto

Koichi Kuramoto

Toru Suguro

Hiroyasu Ikegami

Yukio Horiuchi

Shinichiro Takayama

Shigeki Momohara

Atsuhito Seki

Toshiyasu Nakamura

Atsushi Tanji

Yasuo Niki

Takaaki Yabuki

A tibial resection assisting device includes: a femoral paddle including a first contact surface brought into contact with a resection surface of a distal portion of a femur; and a tibial paddle including a second contact surface brought into contact with a proximal portion of a tibia that is unresected. The femoral paddle is mounted to a base disposed at an anterior side of a knee joint. A movable body mounted to the base is movable in an orthogonal direction to the first contact surface. The tibial paddle is mounted to the movable body and is swingable about a swing shaft that extends in an anterior-posterior direction of the knee joint, the anterior-posterior direction being parallel to the first contact surface. Further, a reference guide mounted to the base is movable in the orthogonal direction and is intended for positioning a tibial cutting guide.

Tibial resection assisting device

An artificial elbow joint including a humeral component made of metal and an ulnar component made of resins for replacing an elbow joint. The humeral component of this artificial elbow joint is configured by a substantially cylindrical trochlea and a stem extending from the trochlea that is inserted into the humeral; and the ulnar component is configured by a joint surface member which receives the trochlea of humeral component in a rotatable manner and a stem which extends from the joint surface member and is inserted into the ulna. The stem of the humeral component is curved gently downward overall so as to comply with the lordotic shape of the humeral, and the trochlea is turnable about the centerline of the stem.

Artificial elbow joint

An artificial knee joint including a femoral component and a tibial component which are in relation of making relative rotation, in which the tibial component has a post that has an outwardly curving posterior surface and is disposed approximately in the longitudinal center between the articular surfaces so that the post is inside an intercondylar groove that is between the medial and lateral condyles and extends from the posterior end to the anterior end of the femoral component; and the femoral component has a cam that is disposed at the posterior portion of the intercondylar groove and comes into contact with the posterior surface of the post when the above-described rotation proceeds; and the post and the cam are shaped so that the femoral component is turned outwardly when the cam comes into contact with the post as a result of the rotation and as the rotation proceeds.

Artificial knee joint

An artificial knee joint including a femoral component to be attached to a femur and a tibial component to be attached to a tibia, wherein in the femur component a medial condyle thereof is thicker than a lateral condyle thereof; in the tibial component, a medial articular surface thereof, which supports the medial condyle of the femur component, is thinner or deeper than a lateral articular surface thereof, which supports the lateral condyle of the femur component; and a joint line joining the lowest points of contact surfaces between the medial and lateral condyles of the femur component and the medial and lateral articular surfaces of the tibial component in a longitudinal cross section in a medial-lateral direction is inclined inward at virtually the same angle over the entire region of an angle of flexion-extension.

Growing community of inventors

Okayama, Japan

Keitaro Yamamoto