Dynamic void behavior in polymerizing polymethyl methacrylate cement

The Journal of Arthroplasty
Scott D Muller, Andrew W McCaskie

Abstract

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.

References

Jan 1, 1987·The Journal of Arthroplasty·R L WixsonM A Novak

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Citations

Mar 5, 2019·Advanced Healthcare Materials·Daniel CohnRaju Ramanujan
Dec 28, 2007·The Journal of Bone and Joint Surgery. British Volume·T ScheerlinckJohn S Dunn

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