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Dynamic void behavior in polymerizing polymethyl methacrylate cement

Lookup NU author(s): Dr Scott Muller, Professor Andrew McCaskie


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Cement mantle voids remain controversial with respect to survival of total hip arthroplasty. Void evolution is poorly understood, and attempts at void manipulation can only be empirical. We induced voids in a cement model simulating the constraints of the proximal femur. Intravoid pressure and temperature were recorded throughout polymerization, and the initial and final void volumes were measured. Temperature-dependent peak intravoid pressures and void volume increases were observed. After solidification, subatmospheric intravoid pressures were observed. The magnitude of these observations could not be explained by the ideal gas law. Partial pressures of the void gas at peak pressures demonstrated a dominant effect of gaseous monomer, thereby suggesting that void growth is a pressure-driven phenomenon resulting from temperature-dependent evaporation of monomer into existing trapped air voids. © 2006 Elsevier Inc. All rights reserved.

Publication metadata

Author(s): Muller SD, McCaskie AW

Publication type: Article

Publication status: Published

Journal: Journal of Arthroplasty

Year: 2006

Volume: 21

Issue: 2

Pages: 279-283

ISSN (print): 0883-5403

ISSN (electronic): 1532-8406

Publisher: Churchill Livingstone


DOI: 10.1016/j.arth.2004.10.020

PubMed id: 16520219


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