So in your opinion, is hip bone a good material for facial implants? It won't resorb too much?
For the most part, it's used as a bone buttress, graft, sandwiched between a bone cut where separating the bone to either elongate, widen or wedge forward leaves a GAP to be FILLED.
As far as materials for face implants go, it's really the SHAPE of them that matters and docs ability to carve the right shape (or have it designed) if the implant is alloplastic (but bio-compatible) material like medpore or firm silicones.
As to hip bone and
also cartilage, there would be resorption over time, just like there is in the aging process. I believe they anticipate some over time and for that reason compensate by some over correction.
As to my 'opinion', I'm not sure that even matters given the new phenomena of patients where the ones who would be better served by implants are the ones who want the bone cuts (and bone grafts) instead. Vice versa with the ones who need bone cuts and insist on implants.
So, there is a factor of 'risk aversion' people who are disproportionately averse to the 'risk' of one material over the other as in HYPER focused on the risks of one and HYPO focused on the risks of the other.