[Influence of vacuum mixing on mechanical properties of homemade bone cement].
Porosity, density and rotating bar bending fatigue life of homemade bone cement are analyzed with scanning electron microscopy for two different mixing techniques: manually vacuum mixing and manually non-vacuum mixing. By vacuum mixing the rotating bar bending fatigue life is increased from 0.98 x 10(4) +/- 0.31 x 10(4) to 1.33 x 10(4) +/- 0.17 x 10(4) (P < 0.05), density increased from 1.0638 +/- 0.0005g/cm3 to 1.1024 +/- 0.0068g/cm3 (P < 0.05), porosity reduced from 10.35% +/- 2.33% to 5.83% +/- 1.74% (P < 0.05), and incidence rate of big air inclusion reduced from 5.93% to 0.9%. We believe, vacuum mixing technique of bone cement should be recommended as a routine procedure to prevent aseptic loosening of prosthesis after total joint arthroplasty.
Chen
X X
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Arthropathy Clinic and Research Center, People's Hospital, Beijing Medical University.
D001843:Bone Cements; D007595:Joint Prosthesis; D008855:Microscopy, Electron, Scanning; D016062:Porosity; D012399:Rotation; D014618:Vacuum
D001843:Bone Cements