“How common is jaw surgery relapse?”

Very rare with the use of rigid fixation (screws and plates).

Relapse is more common the farther the jaw is advanced, so for long movements (i.e., > 6-8mm) skeletal relapse is more likely.

Thanks for your question! Fortunately, relapse after reconstructive jaw surgery is quite rare these days due to many advancements in the surgical techniques we use to move and stabilize the upper and lower jaws. When we do see relapse, it's usually in the range of 1 to 2 mm, which is generally negligible and sometimes not clinically significant. However, with contemporary rigid internal fixation using titanium plates and screws, we generally see essentially no relapse that can be clinically observed, and we find that it does not generally affect the occlusal outcome of the operation, or the bite. I hope this helps!

Not very common