Jasty M, Davies J P, O'Connor D O, Burke D W, Harrigan T P, Harris W H
Orthopaedic Biomechanics Laboratory, Massachusetts General Hospital, Boston 02114.
Clin Orthop Relat Res. 1990 Oct(259):122-9.
The total porosity and mean pore sizes of various bone cement preparations were measured using image analysis. The porosity in different commercial bone cements varied from 5% to 16% when these cements were prepared in the usual fashion. Centrifugation for 30 seconds resulted in a substantial reduction in the overall porosity of Simplex P, AKZ, Zimmer Regular, and CMW bone cements by reducing both the mean pore size and the number of pores per unit area. In contrast, the porosity of LVC, Palacos R, and Palacos R with gentamicin bone cements was not significantly decreased by centrifugation. Chilling the monomer before mixing resulted in higher porosity of both the centrifuged and uncentrifuged Simplex P, Zimmer Regular, and CMW bone cements. Simplex P mixed with chilled monomer and centrifuged for 120 seconds has one of the lowest porosities of the various cements, while retaining good handling characteristics and excellent fatigue strength.
使用图像分析测量了各种骨水泥制剂的总孔隙率和平均孔径。当以常规方式制备这些骨水泥时，不同市售骨水泥的孔隙率在5%至16%之间变化。30秒的离心处理通过减小平均孔径和单位面积内的孔隙数量，使Simplex P、AKZ、Zimmer Regular和CMW骨水泥的总体孔隙率大幅降低。相比之下，LVC、Palacos R和含庆大霉素的Palacos R骨水泥的孔隙率在离心后并未显著降低。混合前将单体冷却会使离心和未离心的Simplex P、Zimmer Regular和CMW骨水泥的孔隙率更高。与冷却单体混合并离心120秒的Simplex P在各种骨水泥中孔隙率最低之一，同时保持良好的操作特性和优异的疲劳强度。
