Notch/chamfer guide
US5916221A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Sep 17, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/68
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A notch/chamfer guide has chamfer and trochlear recess cutting slots and a notch, corresponding to the intercondylar box of a femoral implant, with a removable notch slot attachment. With the notch slot attachment assembled to the cutting guide adjacent the notch, blade receiving slots are defined between the notch slot attachment and the inside walls of the notch. The slots provide control to the saw blade to prevent the blade from angling away from the notch walls and making imprecise cuts. The notch slot attachment is removable to allow easy access to the notch area so that a manual instrument such as an osteotome can be used for final removal of the notch bone and to facilitate the use of an oscillating saw in the chamfer slots of the guide. A U-shaped notch is provided for cutting a trochlear recess that will lie behind the anterior portion of the implanted knee component to receive the backside of the patellar track of the implant. The outside surface of the guide, corresponding to the distal aspect of the femur, is angled so that it is parallel to the guide surface which guides the cut forming the top of the intercondylar notch. This parallel external surface of the guide ac…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.