Method for cementing intramedullary bone prosthesis
US5597383A · kind A · utility
Inventor
Key dates
| Filing date | Dec 10, 1993 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | Dec 10, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S623/908
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An intramedullary bone prosthesis to be rigidly cemented into position in the femur, and also applicable to total knee and shoulder replacement operations, is provided as an improved surgical technique. The prosthesis is composed of a femoral head base, a femoral head post, a long femoral stem, a cement canal along its longitudinal axis, a spacer, a collar, and a distal restrictor. The prosthesis is placed into the prepared medullary canal. With collar in position, a bone cement injector is readily threaded on to the proximal portion of the cement canal. Cement is injected and subsequently travels down through the canal, through the spacer, and eventually exits openings at the bottom of the spacer. The distal restrictor plug halts downward cement travel, thus initiating an upward, substantially completely retrograde filling of the void in between the prosthesis and the cancellous bone wall. The cement reaches the collar or cement restrictor, thus proximally dislodging all air bubbles, blood, and blood products. Finally during curing, the cement injector, and excellent cement interdigitation is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.