US 12,239,541 B2
Artificial knee joint
Dai Kiyotomo, Okayama (JP); and Takayuki Inoue, Okayama (JP)
Assigned to TEIJIN NAKASHIMA MEDICAL CO., LTD., Okayama (JP)
Appl. No. 17/602,648
Filed by TEIJIN NAKASHIMA MEDICAL CO., LTD., Okayama (JP)
PCT Filed Feb. 18, 2020, PCT No. PCT/JP2020/006157
§ 371(c)(1), (2) Date Oct. 8, 2021,
PCT Pub. No. WO2020/208942, PCT Pub. Date Oct. 15, 2020.
Claims priority of application No. 2019-075260 (JP), filed on Apr. 11, 2019.
Prior Publication US 2022/0160513 A1, May 26, 2022
Int. Cl. A61F 2/38 (2006.01)
CPC A61F 2/389 (2013.01) [A61F 2/3859 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An artificial knee joint comprising:
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 increasing from an anterior side toward a posterior side within a predetermined range in an anterior-posterior direction, wherein
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.