Knee joint prosthesis and related method

US9833323B2 · kind B2 · utility

Assignee

• Aesculap AG · DE

Inventors

• Berna Richter · Hannover, DE
• Christof Hurschler · Hannover, DE
• Sven Ostermeier · Hannover, DE

Key dates

• Filing date: Jul 9, 2010
• Grant date: Dec 5, 2017
• Expiry date: Jul 9, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49826
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The present invention relates to a knee joint prosthesis having a tibial component and a femoral component. The tibial component includes a fixation portion fixed to an upper end of a prepared tibia and a ceramic bearing portion presenting articulation surface(s). The femoral component is fixed to a lower end of a prepared femur and comprises a ceramic body portion presenting articulation surface(s). The respective articulation surfaces of the tibial and femoral components are configured for essentially congruent engagement over a full range of movement of the prosthesis, and the bearing portion of the tibial component is adapted for movement relative to the fixation portion. Also disclosed is an apparatus and a method for finishing articulation surfaces of ceramic components of a knee joint prosthesis, including the steps of combining the ceramic bearing portion and the ceramic body portion, and imparting relative movement to the bearing portion and/or the body portion.