Tibial knee component with a mobile bearing

US8137407B2 · kind B2 · utility

Assignee

• Zimmer, Inc. · US

Inventors

• Dwight T. Todd · Fort Wayne, US
• Brian D. Byrd · North Webster, US
• James C. Harris · Warsaw, US
• Kim C. Bertin · Bountiful, US
• Linggawati Tanamal · Fort Wayne, US
• Peter S. Walker · Ridgewood, US

Key dates

• Filing date: Mar 9, 2005
• Grant date: Mar 20, 2012
• Expiry date: Feb 11, 2027

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61F2/3868
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A mobile bearing knee prosthesis apparatus includes a tibial plate. The tibial plate includes a medial lobe and a lateral lobe conjoined in a dividing plane. The apparatus further includes a tibio-femoral insert and a stud-like protuberance extending from the tibial plate into the tibio-femoral insert. The stud-like protuberance includes a protuberance sidewall positioned in the tibio-femoral insert. The protuberance sidewall is bisected by the dividing plane and includes a pair of opposing eccentric convex arcuate portions, and the tibio-femoral insert is moveable relative to the tibial plate about an axis medially disposed from the dividing plane. A mobile bearing knee prosthesis apparatus includes a tibial plate and a tibio-femoral insert coupled to the tibial plate. The tibio-femoral insert includes a generally posteriorly positioned chamfered superior surface and defines a generally posteriorly positioned generally U-shaped space bounded at least in part by the chamfered surface.