Surgery The Sagittal split mandibular operation A is a good operation for closing an anterior open bite. B Has a very low incidence of inferior dental nerve anaesthesia or paraesthesia with a skilled operator. C Has a lower morbidity when used for pushing back a mandible than an intra oral vertical subsigmoid osteotomy. D Rarely leads to a non union of the osteotomy site 💡 Explanation The Sagittal split mandibular operation ✓ Correct Answer: D. Rarely leads to a non union of the osteotomy site