US 11,690,727 B2
Artificial ankle joint tibia component
Keun-Bae Lee, Gwangju (KR); and Tae-Jin Shin, Hanam-si (KR)
Assigned to CORENTEC CO., LTD., Chungcheongnam-do (KR); CHONNAM NATIONAL UNIVERSITY HOSPITAL, Gwangju (KR); and INDUSTRY FOUNDATION OF CHONNAM NATIONAL UNIVERSITY, Gwangju (KR)
Appl. No. 16/642,795
Filed by CORENTEC CO., LTD., Cheonan-si (KR); CHONNAM NATIONAL UNIVERSITY HOSPITAL, Gwangju (KR); and INDUSTRY FOUNDATION OF CHONNAM NATIONAL UNIVERSITY, Gwangju (KR)
PCT Filed Aug. 28, 2018, PCT No. PCT/KR2018/009917
§ 371(c)(1), (2) Date Feb. 27, 2020,
PCT Pub. No. WO2019/045412, PCT Pub. Date Mar. 7, 2019.
Claims priority of application No. 10-2017-0109179 (KR), filed on Aug. 29, 2017.
Prior Publication US 2020/0188126 A1, Jun. 18, 2020
Int. Cl. A61F 2/42 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/4202 (2013.01) [A61F 2002/30884 (2013.01); A61F 2002/4205 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A tibial component for coupling to a tibia in artificial ankle joint arthroplasty, the tibial component comprising:
a body part having a contact surface configured to contact a resected surface of a distal end of the tibia, a joint surface opposite the contact surface, and a medial surface extending between the contact surface and the joint surface and configured to contact another resected surface of the tibia, the body part including an anterior-posterior line and a medial-lateral line that extends orthogonal to the anterior-posterior line;
at least one spike outwardly projecting from the contact surface at a posterior side of the contact surface; and
a fixing part extending a predetermined length outward from the contact surface, the fixing part comprising:
a central portion outwardly projecting from the contact surface and terminating at an end face;
two posterior wings extending at angles symmetrical to each other relative to the anterior-posterior line; and
two anterior wings extending at angles symmetrical with the posterior wings relative to the medial-lateral line;
the two posterior wings and the two anterior wings extending in an X-shape from the central portion of the fixing part,
wherein the fixing part is disposed anterior to the at least one spike and extends at an angle toward the posterior side of the contact surface,
wherein the two anterior wings and the two posterior wings each taper inwardly as they extend from the contact surface to a top end of the fixing part so that a cross-sectional area of the fixing part is reduced as the fixing part extends from the contact surface to the top end of the fixing part;
wherein the contact surface has an anterior side opposite of the posterior side, the anterior side terminating at an anterior boundary surface that extends between the contact surface and the joint surface, wherein the contact surface extending between the fixing part and the anterior boundary surface is planar with no projections upstanding therefrom; and
further comprising a blocking part upstanding from the contact surface so that the at least one spike is disposed between fixing part and the blocking part, the blocking part having an elongated length at least partially extending between the medial surface and an opposing lateral surface of the body part.