Engineering and Computer Science Faculty Publications

In-vitro Performance of Intramedullary Cement Restrictors in Total Hip Arthroplasty

Document Type

Article

Publication Date

6-2003

Journal Title

Journal of Biomechanics

Volume

36

Issue

6

First Page

835

Last Page

843

DOI

10.1016/S0021-9290(03)00017-4

Abstract

Contemporary cementing techniques in total hip arthroplasty include the use of a cement restrictor to occlude the intramedullary canal. As there are many different designs currently available it was the aim of our study to compare the stability of eight different systems. We investigated the displacement and the ability to occlude the femur of these cement restrictors during standardised cementing of artificial and fresh frozen femora. The maximal intramedullary pressures and the displacement of the plugs were continuously recorded and statistically evaluated.

The results revealed significant differences between the tested cement restrictors. The expandable REX™ Cement Stop and the Exeter Plug™ achieved the highest stability and the least cement leakage. The more rigid designs (Palacos Plug®, BUCK™, Universal) in contrast showed inferior performance. Our biomechanical study emphasises the importance of cement restrictor selection, which can have a crucial influence on the fixation of a cemented total hip replacement.

Keywords

Cementing technique; Cement restrictor; Migration; Stability; Total hip arthroplasty

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