Femoral Remodeling After Cementless THR with and without
Hydroxyapatite
Michael Tanzer,
M.D.,F.R.C.S.(C) Director Orthopaedic Group Associate Professor, Department of Surgery McGill University Montreal, Quebec Various
approaches have been investigated in attempt to increase the extent and
reproducibility of osseointegration of cementless femoral implants. One the of approaches that has been
extensively investigated and continues to show clinical promise is the use of
hydroxyapatite (HA) coating. To date,
there are no prospective randomized trials to assess the effect of
hydroxyapatite-tricalcium phosphate (HA-TCP) coating on femoral bone
remodeling after cementless THA using identical proximally porous coated
femoral components. This study assesses femoral bone remodeling using dual-energy x-ray absorptiometry (DEXA) for two years following THA. Thirty-nine hips are randomized to receive a titanium proximally porous-coated femoral component with or without HA-TCP coating. Although both stems results in alterations in the periprosthetic bone mineral density, the HA-TCP coated stem has significantly more proximal femoral bone than the uncoated stems at two years follow-up. This increased femoral bone stock may provide both short and long term advantage over noncoated stems. |
