Am. Rashmirraven et al., THE RESPONSE OF CANCELLOUS AND CORTICAL CANINE BONE TO HYDROXYLAPATITE-COATED AND UNCOATED TITANIUM RODS, Journal of applied biomaterials, 6(4), 1995, pp. 237-242
Because of the recent trend in total hip arthroplasty to achieve direc
t contact of the endoprosthesis with cortical bone, comparison of bone
apposition from cortical bone and cancellous bone was performed. The
response of cortical and cancellous bone to hydroxylapatite was also c
ompared. Implants in cortical bone demonstrated a higher interface she
ar strength and more bone apposition than those in cancellous bone ove
r all time periods tested, Hydroxylapatite coating increased the inter
facial shear and bone apposition in cortical bone at all time periods
and in both the 3- and 6-week cancellous bone models. The potential ef
fect of stress shielding (and subsequent bone resorption) by femoral s
tems ingrown with cortical bone is discussed. (C) 1995 John Wiley & So
ns, Inc.