Gm. Luo et al., The effect of surface roughness on the stress adaptation of trabecular architecture around a cylindrical implant, J BIOMECHAN, 32(3), 1999, pp. 275-284
The effect of implant-bone bonding and the effect of implant surface roughn
ess on bone remodeling near the bone-implant interface were studied by usin
g a surface remodeling theory and the boundary element method. The study ha
s shown that implant attachment plays an important role in bone remodeling
near the implant. It has been observed in animal experiments and in clinica
l situations that the remodeled trabecular bone architecture around a cylin
drical implant could vary, on one hand, from a hub surrounding the implant
with a set of external spokes to, on the other hand, a hubless situation in
which a set of spokes attach directly to the implant. It is shown here tha
t the difference in these structures may be attributed to differences in im
plant attachment. The results show that the bone with perfect bonding or ro
ller boundary condition without a gap remodeled to a hubless spoke trabecul
ar bone architecture. On the other hand, the roller boundary condition with
a specified gap yielded a spoke trabecular architecture with a hub or ring
surrounding the implant. These quantitative results mirror the experimenta
l and clinical observations. It is concluded that the hub is a consequence
of the gap and not a consequence of the lack of friction between the implan
t and the bone. (C) 1999 Elsevier Science Ltd. All rights reserved.