Influence of two changes in the composition of an acrylic bone cement on some of its properties: The case of Surgical Simplex\u3csup\u3e®\u3c/sup\u3e P

Influence of two changes in the composition of a self-curing acrylic bone cement on some of its properties are discussed. Acrylic bone cements are widely used in orthopedic surgery for the fixation of joint prosthesis and in vertebroplasty and kyphoplasty for the stabilization and augmentation of fractured vertebrae. The cement\u27s curing process is the result of a free-radical polymerization of a mixture of poly (methyl 1 methacrylate) [PMMA] containing powder and a liquid monomer that has methyl methacrylate (MMA) in it. It is initiated by the decomposition of benzoyl peroxide (BPO) in the powder, activated by a tertiary amine in the monomer, and stabilized by hydroquinone in the monomer. Commercially available acrylic bone cement that is widely used in cemented anthroplastics has been used to determine the extent to which the composition of an acrylic bone cement influences the values of the properties of the curing and cured cement