Variable stiffness stem for prosthetic implants
US8751198B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2007 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Mar 9, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00029
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for forming an implant for a bone including the steps of generating a first general shape for the implant having a length extending along a long axis of the bone, determining an area moment of inertia of a cross section of the implant, determining an area moment of inertia for a cross section of bone coplanar to the cross section of the implant, calculating a percent stress shielding from the area moments of inertia of the implant and the bone, comparing the calculated percent stress shielding to a preset threshold, and iteratively generating additional general shapes for the implant by locally adjusting the cross section of the implant until the calculated percent stress shielding meets the preset threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.