Femoral stem for artificial coxal articulation and method for processing neck portion thereof
US7311735B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 2, 2005 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Apr 20, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00179
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Disclosed are a femoral stem for artificial coxal articulation, in which portions of the femoral stem interfering with and contacting an insertion in the joint movement of the femoral stem are removed from the femoral stem so as to maximize the range of the joint movement thereof while maintaining the cross sectional area thereof, and a method for processing a neck portion of the femoral stem. The method includes cutting symmetrical portions of the outer circle of a circular rod to form cutting planes inwardly inclined such that the cutting planes contact a virtual inner circle having the same center as that of the outer circle; and rounding a portion between the cutting planes along the inner circle so that the inner part of the outer circle is shorter than the outer part of the outer circle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.