Other

Teijin Nakashima Medical Co., Ltd.

Nakashima Propeller Co., Ltd.

Osaka University

Takayuki Inoue

Mamoru Mitsuishi

Shinichi Warisawa

Kouichi Kuramoto

Dai Kiyotomo

Hiroyuki Takahashi

Yasuki Sumasu

Keita Uetuki

Hiroomi Kimura

An artificial knee joint includes: a femoral component including a medial condyle and a lateral condyle; and a tibial component including an inner sliding surface that receives the medial condyle and an outer sliding surface that receives the lateral condyle. A curvature radius of each of the inner sliding surface and the outer sliding surface in a medial-lateral direction increases from an anterior side toward a posterior side within a predetermined range in an anterior-posterior direction. In the medial-lateral direction, the inner sliding surface and the outer sliding surface are positioned inward such that a middle point between a lowest point of the medial condyle and a lowest point of the lateral condyle in a knee extended position is shifted inward relative to a center of the tibial component by 2 to 10% of a width of the tibial component.

Artificial knee joint

A curved surface machining method that performs finishing of the surface of a workpiece into a curved surface. The method includes the steps of: setting a workpiece in a rotating or stationary state in a water tank filled with an abrasive-containing solution into which an abrasive with a grain size of less than 1 &#x3bc;m has been admixed; and spraying a high-speed fluid in the abrasive-containing solution while a position, direction, and angle thereof is controlled relative to the workpiece, thus grinding and finishing the surface of the workpiece to an intended surface roughness and profile accuracy.

Curved surface machining method and an apparatus thereof

Growing community of inventors

Okayama, Japan

Takayuki Inoue