Cemented taper lock acetabular cup
US5171286A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1991 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Jul 26, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2310/00952
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An acetabular cup for use in a total hip prosthesis includes an implant/cement interface portion for location in a cement mantle. The cup has an enclosure element for allowing the cup to slide lengthwise to re-engage itself in the cement mantle to accommodate creep or movement thereof. Thus, should there be a tendency for the cup to become loose, the construction according to the invention is intended to relock the cup within the cement mantle. Thus, if the bone remodels, then the cement mantle will creep to re-adapt itself to the bone and the implant will re-engage in the cement mantle accommodating to the movement of the cement. If the bone cement is too highly stressed in places, it will creep in order to relieve this stress and the implant will re-settle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.