bone cement
TRANSCRIPT
Bone Cements are self curing cement like formulations which may or may not contain Antibiotics used for positioning and
securing of a metal or prosthesis to living bone.
Not a glue Mechanical bond Well secured to cancellous bone Lower Modulus of Elasticity Strength half of compact bone Withstand 3 times compression well. Fails under shear tension.
Liqiud Monomer-Methyl methacrylate Stabiliser-Hydroquinone, Ascorbic acid..
Ethyl Alcohol-Vehicle to enhance stabilisation of Asc Acid
Activator-N N dimethyl P toluidine
Heat of polymerisation-coagulation of protein
Occlusion of nutrient metaphyseal arteries and Bone necrosis
Cytotoxic lipolytic effects
Ideal temp-23C Uniform mixing To reduce porosity- vaccum,
centrifugation Apply in doughy state Dry fresh glove, dry the surface. Applicn-digital,cement gun, syringe. Pressurisation till setting.
Colouring agents to detect cement during revision.
CONTRAINDICATIONS Hypersensitivity reaction Infections Mysthenia grevis Children