[A quantitative analysis for determining porosity of pre-compressed and vacuum-mixed bone cement].
The porosity and the mechanical strength of 64 bone cement specimens were investigated. Different types of mixing procedures were tested: 1) hand, 2) compression, 3) vacuum and 4) the combination of vacuum stirring and compression. The differences in porosity and mechanical stability are remarkable. In relation to hand-mixed bone cement all techniques are leading to a reduction in the number of cavities. Specimens made by compression are showing a confluence of several small cavities to a few large. There is only a change in the distribution of the embedded gas volume, but not a reduction. The lowest porosity is seen in vacuum mixed specimens.
Abteilung Osteopathologie, Universität Hamburg.
M
M
Hahn
E
E
Engelbrecht
G
G
Delling
D001843:Bone Cements / Q000032:analysis*; D004339:Drug Compounding / Q000379:methods; D005839:Gentamicins / Q000032:analysis*; D006801:Humans; D008768:Methylmethacrylates / Q000032:analysis*; D008853:Microscopy; D010316:Particle Size; D013718:Tensile Strength
D001843:Bone Cements; D005839:Gentamicins; D008768:Methylmethacrylates; C030159:gentamicin-polymethylmethacrylate bead
Eine quantitative Analyse zur Bestimmung der Porosität von vorkomprimiertem und unter Vakuum gemischtem Knochenzement.