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.
Schreurs
B W
BW
Department of Orthopedics, University of Nijmegen, The Netherlands.
Spierings
P T
PT
Huiskes
R
R
Slooff
T J
TJ
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