Bone prosthesis made of sintered alumina
US3977026A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 1975 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | May 29, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/342
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Prosthesis device intended for replacing a bone joint, more particularly that of the hip, and comprising two parts which replace its active portions, the portion of each of the two parts on which the contact surface between these latter is formed being made of sintered alumina. One of the two parts has a spherical internal face forming a contact surface and an external face which is to be fixed into one of the bones of the joint, contained in a sphere and provided with grooves a part of which is arranged between cones whose apexes are on the axis and/or between cylinders having the same axis of symmetry as the external face. The surface provided for the bone cells to grow again is greater than that which would be provided by a part having grooves between planes perpendicular to the axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.