How common is masseter dehiscence after jaw angle implant surgery?

If this operation is done correctly, the incidence should be low (not 0%). Things that I do to help avoid this include an intraoral incision which allows for a pocket to be created between the mandible and the pterygomasseteric sling rather than completely cutting the muscle. I hope this helps.

A disproportionate relationship between the location of the maximum thickness of the masseter muscle and the implanted jaw angle area is not common but is also not completely rare. Whether it occurs depends on several factors including surgical technique and how much the jaw angle is vertically lengthened by the implant if at all.