Measuring apparatus for total knee replacement operation
US7156853B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 25, 2003 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Aug 5, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2090/067
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus in a total knee replacement and arthroplasty operation for measuring a joint gap and ligament balance between a osteotomized surface at a femoral distal end and a osteotomized surface at a tibial proximal end. The apparatus is provided with a base 10, from which an engaging plate 14 extends by way of an arm, so that the engaging plate 14 contacts with the osteotomized surface at the tibial proximal end. A moving body 18 is vertically movably connected to the base 10, from which moving body 18 an arm 20 extends, to which arm a supporting plate 22 is rotatably mounted about a central axis. The supporting plate 22 has, at its top surface, a projected portion 48. to which an auxiliary guiding piece 50 is connected under a snap like fitted manner. A femoral component 52 is mounted, at its groove portion 54, to the osteotomized surface at the femoral distal end. The engaging plate 14 as well as the supporting plate 22 are under an offset arrangement with respect to the base and moving body, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.