Mandibular angle osteotomy has intraoral incision, extraoral incision and combined extraoral incision. For example, the incision of oral incision is hidden, and there are no surgical marks on the face, but the amount of bone removal is small. The complications caused by extraoral incision are relatively low, and the amount of bone removed is also large.

Intraoral incision is an ideal surgical method, which will not leave skin scars.