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Relationship between the morphology of PMMA particles and properties of acrylic bone cements

✍ Scribed by M. B. Ginebra; F. X. Gil; J. A. Planell; B. Pascual; I. Goni; M. Gurruchaga; B. Levenfeld; B. Vázouez; J. San Roman

Publisher
Springer
Year
1996
Tongue
English
Weight
606 KB
Volume
7
Category
Article
ISSN
0957-4530

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✦ Synopsis

Bone cements are mainly based on acrylic polymers, poly(methyl methacrylate) (PMMA) being the most representative. The curing process (cold curing) is the result of the free radical polymerization of a mixture of beads of PMMA and methyl methacrylate (MMA), initiated by benzoyl peroxide (BPO) and activated by the presence of a tertiary amine, the most classical being N,N-dimethyl-4-toluidine (DMT). In this workthe results on the effect of the size and size distribution of PMMA beads and the concentration of DMTand BPO on the setting parameters, the residual monomer content and the mechanical properties (tension and compression) of the cured systems are presented. The use of relatively larger diameter PMMA beads improves the characteristic parameters of the curing process (decreasing the peak temperature and increasing the setting time), without detrimental effects on the mechanical properties of the cured cement.

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