Systems and methods for prosthetic knee
US8628579B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 22, 2011 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Aug 7, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/30884
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A knee prosthesis including femoral and tibial implants, a tibial insert and a cam post assembly. The femoral implant is secured to a femur and has a cam feature and condyles. The tibial implant is secured to a tibia. The tibial insert has articulating surfaces that match the contours of the condyles of the femoral implant, and may have a medial boss that aligns with the tibial implant to provide rotation about a medially displaced rotation axis. A cam post is secured to the tibial implant and passes through a channel of the tibial insert. A motion limiting structure provides limits to motion between the tibial insert and the tibial baseplate. The cam post assembly interacts with the femoral implant cam feature and allows more anatomically correct rollback and femoral external rotation during knee flexion, and varus/valgus support to the femur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.