Cemented fixation with PMMA or Bis-GMA resin hydroxyapatite cement: effect of implant surface roughness.
Implant surface roughness is an important parameter governing the overall mechanical properties at the implant-cement interface. This study investigated the influence of surface roughness using polymethylmethcrylate (PMMA) and a Bisphenol-a-glycidylmethacyrlate resin-hydroxyapatite cement (CAP). Mechanical fixation at the implant-cement interface was evaluated in vitro using static shear and fatigue loading with cobalt chrome alloy (CoCr) dowels with different surface roughness preparations. Increasing surface roughness improved the mechanical properties at the implant-cement interface for both types of cement. CAP cement fixation was superior to PMMA under static and dynamic loading.
Walsh
W R
WR
Orthopaedic Research Laboratories, University of New South Wales, Prince of Wales Hospital, Sydney, NSW 2031, Australia. w.walsh@unsw.edu.au
Svehla
M J
MJ
Russell
J
J
Saito
M
M
Nakashima
T
T
Gillies
R M
RM
Bruce
W
W
Hori
R
R
D000497:Alloys; D001672:Biocompatible Materials; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry*; D001843:Bone Cements / Q000737:chemistry*; D002484:Cementation; D002858:Chromium Alloys / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry; D017886:Durapatite / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry; D006358:Hot Temperature; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D019736:Prostheses and Implants; D013314:Stress, Mechanical; D013499:Surface Properties
D000497:Alloys; D001672:Biocompatible Materials; D001843:Bone Cements; D002858:Chromium Alloys; D005899:Glass Ionomer Cements; D003035:Cobalt; D017438:Bisphenol A-Glycidyl Methacrylate; D019904:Polymethyl Methacrylate; D017886:Durapatite