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A reduced-modulus acrylic bone cement: Preliminary results

✍ Scribed by Dr. Alan S. Litsky; Robert M. Rose; Clinton T. Rubin; Elliott L. Thrasher

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
359 KB
Volume
8
Category
Article
ISSN
0736-0266

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Excessive local contact stress is implicated as an important factor in the initiation of the loosening process after total joint arthroplasties. A reduced‐modulus acrylic bone cement, which decreases the bone‐cement interface stresses, was developed to test this hypothesis. The formulation consists of butylmethacrylate beads, having a glass transition temperature of 27Β°C in a methylmethacrylate matrix. This cement, polybutylmethylmethacrylate (PBMMA), has an elastic modulus one‐eighth that of standard PMMA bone cement, 0.27 vs. 2.1 GPa, at body temperature. In vivo use in a pilot study using the sheep total hip arthroplasty model shows a reduction in the rate of loosening of femoral components when compared both radiographically and mechanically with PMMA controls.

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