Acetabulum part for a total hip prosthesis
US4792337A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 1987 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | Oct 6, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2220/0033
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An acetabulum part for a total hip prosthesis has a metallic anchoring shell (1) whose convex surface facing the pelvic bone essentially has the form of a spherical cap, with a socket insert (2) that can be inserted into the anchoring shell (1) whose external convex form is adjusted to the interior concave form of the anchoring shell (1) in such a way that it can be fixed against rotation without using bone cement in the anchoring shell (1). The internal concave form of the insert (2) allows for friction-free and undisturbed motion of a synthetic femur ball head. The shell (1) has several slits (9) located along the meridians of the spherical cap and has numerous holes (6) between the equatorial line and the pole of the spherical cap for the cement-free primary anchoring in the pelvic bone with anchoring screws (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.