Femoral insert for hip joint prosthesis
US3965490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1975 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Oct 6, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/3631
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A polished spherical head is connected to a proximally curved longitudinally tapered stem by a neck and collar. The overall length is about 6 inches or 150 mm. with the stem being approximately 41/2 inches or 115 mm. long. The stem has substantially flattened ellipsoidal cross section tapering from a relatively high curved proximal portion to a smooth junction with the distal portion which more gradually tapers in height to a rounded end. The thickness of the stem tapers uniformly from the proximal to distal end. One or more shallow teardrop-shaped depressions are disposed in the flat sides of the curved proximal portion of the stem with their bases disposed substantially parallel to each other at a distance apart which smoothly merges into a junction with the outsides of the distal portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.