Effects of preparation techniques on the porosity of acrylic cements.
We investigated four acrylic cement preparation techniques for their effects on cement porosity: hand mixing, pressurization in a pneumatic pistol, centrifugation, and vacuum mixing. All the techniques were tested on three types of cement with different viscosity characteristics. The best results were obtained with vacuum mixing using a newly designed experimental system, yielding porosity reductions of 60-80 percent relative to hand mixing. Vacuum mixing with a commercial system was also effective, but to a somewhat lesser extent. Pressurization and centrifugation had no substantial effect on the overall porosity. Centrifugation led to considerable nonuniformity in the distribution of pores and additives.
Department of Orthopedics, University of Nijmegen, The Netherlands.
B W
BW
Schreurs
P T
PT
Spierings
R
R
Huiskes
T J
TJ
Slooff
D001843:Bone Cements; D002498:Centrifugation; D004864:Equipment and Supplies; D008722:Methods; D020366:Methylmethacrylate; D008768:Methylmethacrylates; D011312:Pressure; D013718:Tensile Strength; D014783:Viscosity
D001843:Bone Cements; D008768:Methylmethacrylates; D020366:Methylmethacrylate