Natural alignment knee instruments
US9113957B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2014 |
| Grant date | Aug 25, 2015 |
| Priority date | — |
| Expiry date | Oct 28, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2017/565
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for aligning an orthopedic implant in a joint replacement includes determining the bone and cartilage deficiency from an undegenerated state caused by wear of a joint. Then a resection of a bone in the joint is made based on the deficiency of bone and cartilage from the undegenerated state and the size of a joint implant so as to locate the joint surface of the implant in the undegenerated cartilage location. The condylar wear from the undegenerated states may be assessed at a distal and posterior location on each of a medial and a lateral femoral condyle. A distal cut is made on the femur at a location adjusting for the condylar wear from the undegenerated state. The distal cut varus-valgus angle is oriented parallel to a plane across the distal femur after adjusting for wear in the distal location on the medial and lateral condyle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.