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Properties of acrylic bone cements modified with poly(butyl methacrylate)

M. C. RUSU1, D. L. RUSU2, M. RUSU1,* , I. C. ICHIM1

Affiliation

  1. Technical University « Gh. Asachi » Iasi, Faculty of Chemical Engineering and Environmental Protection, Department of Natural and Synthetic Polymers, 700050, Iasi, Romania
  2. Polymers and Composite Tehcnology and Mechanical Engineering Department, Eolde des Mines d Douai, 941 Rue Charles Bourseul,59508, Douai , France

Abstract

Poly(methyl methacrylate) (PMMA) bone cements are extensively used in certain types of total hip or total knee replacements and are of potential utility wherever mechanical attachments of metal to living bone is necessary. The main function of the cement is to serve as interfacial phase between the high modulus metallic implant and the bone, thereby assisting to transfer and distribute loads. The advantages of cemented prosthesis with acrylic bone cements (ABC) lay in their excellent primary fixation, in good load distribution between implant and bone and in the fact that technique allows fast recovery of the patient. In this work are presented the studies about new formulations of ABC, based on PMMA and poly(butyl methacrylate) (PBMA). The effect of PBMA incorporated into the solid phase of ABC, on the curing parameters, density, water absorption, dynamic mechanical thermal tests and mechanical properties were studied. An increase of maximum temperature and a decrease of the setting time were observed with the addition of the PBMA in the cement composition. The density and the shrinkage polymerization show a decrease and the porosity of ABCs increases by introducing and increasing the PBMA content in these compositions. The addition of PBMA in conventionally ABCs composition doesn’t modify appreciably their water absorption kinetic. Also, by adding PBMA in the formulation of ABCs the mechanical properties decrease..

Keywords

Acrylic bone cements, Water absorption, Polymerization shrinkage, DMTA.

Submitted at: Dec. 3, 2009
Accepted at: Feb. 18, 2010

Citation

M. C. RUSU, D. L. RUSU, M. RUSU, I. C. ICHIM, Properties of acrylic bone cements modified with poly(butyl methacrylate), Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 2, pp. 339-346 (2010)