Sliding genioplasty: bone fusion

[berback]

This must have been asked but can't find it. If you get a sliding genioplasty, does the gap close/fuse with bone completely if initially hydroxy apatite is used to fill in the gaps? Both at the sides of the jawline and at the front of the chin? Are there any X-rays/CT scans that show perhaps?

[PloskoPlus]

Ha does not covert into bone.

[PloskoPlus]

Thanks man. And without any graft the bone never fuses (completely) when a sliding genioplasty is performed?

AFAIK with genioplasty there is always some contact between the bone pieces.   That's why is called sliding.  It's the surface indentations that may need filing if the movement is big.  Same with BSSO.

[kjohnt]

What are the alternatives to HA paste to fill those gaps?

[molestrip]

AFAIK with genioplasty there is always some contact between the bone pieces.   That's why is called sliding.  It's the surface indentations that may need filing if the movement is big.  Same with BSSO.

BSSO isn't as bad, mostly the issue is thinning of the bone and to some extent, an inferior notch. The mandible body has the advantage of being load bearing at least, so bone will slowly regrow over time. Chins don't really serve any function AFAIK. Filling it in, well you have the same issues with foreign bodies like you do elsewhere. At least it's relatively accesible OTOH its not a solid object easily removed. Some surgeons are known to try guided bone regeneration in places like these, it can work to some degree but bone likes to be surrounded by other bone still and it's hard to find enough filler material to effectively coax bone to grow into it. Usually you need to supplement with more foreign bodies that will presumably be integrated into the bone and then there's the added morbidity of extracting the donor material.

[corcocarca]

the Porex materials say it is the best because it allows to merge with the bone, the problem is that the merge may change slightly face shape.

[terry947]

just a thought, but can't a sort of "mini ching wing" be performed on notches along the jawline to make it straight again?