Apparatus for, and method of, preparing hip prosthesis implantation
US5910172A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 1997 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | May 20, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00017
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Each tamp in a sequence has a collar at a progressively increased distance from the bottom of a cavity in a femur relative to other tamps in the sequence. The collar on each tamp has progressively increased dimensions relative to collars on other tamps to provide a snug fit of such collar against inner walls defining the femur cavity. Bone particles are also disposed in such cavity. After the insertion of each tamp into the cavity, such tamp is driven into the cavity to pack the bone fragments in the cavity against one another, the collar and the femur inner walls. Such tamp is then removed from the cavity and the next tamp in the sequence is inserted, and driven, into the cavity. The distance for driving each tamp into the cavity may be defined by a coincidence between a marking on such tamp and the top of the femur. When the last tamp in the sequence is removed from the cavity, the cavity is filled with a binder which permeates the space between the bone particles through only a limited distance because of the tight packing of the bone particles. The prosthesis may then be properly positioned in the femur cavity. The prosthesis is slightly narrower than the last tamp so that a th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.