The Bilateral Sagittal Split Osteotomy (BSSO) focuses on the mandible (lower jaw). What it Corrects: It treats an underdeveloped lower jaw (severe overbite/retrognathia) or an overgrown lower jaw (severe underbite/prognathism).The Procedure: The surgeon makes incisions behind the molars on both sides of the lower jaw. The bone is cut lengthwise (sagittally), allowing the front section of the jaw (carrying the teeth) to slide forward or backward smoothly, like an extending drawer. This sliding technique ensures that the bone segments remain in maximum contact with each other, promoting rapid healing once the titanium screw
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