Mandibular resection which is an important component of maxillofacial cancer surgery is an extremely painful procedure associated with severe sympathetic response needing high doses of opioids. Inferior alveolar nerve block is a common nerve block used by dentists for mandibular dental extractions. The aim of this trial is to study the effect of this block for intraoperative analgesia in maxillofacial cancer surgeries requiring unilateral mandibular resection.