A cadaveric study on the buccal branch of facial nerve - origin and its relation pattern to the parotid duct

Abstract

Abstract Background : The knowledge of anatomy of facial nerve and its terminal branches is important for the successful outcome in facial surgeries. The buccal branch of facial nerve due to its characteristic variations in origin and diverse relationship with the parotid duct can be easily injured during parotid duct surgery, parotidectomy or face lift operations. An operating surgeon would find it helpful if the course of buccal branch especially in relation to parotid duct is studied Aim : To describe the origin, course and number of buccal branches of facial nerve and its pattern of relation with the parotid duct. Materials & Methods : The study was done in 100 cadaveric cranial halves including fetuses. The buccal branch was observed for its origin and course. The relationship of buccal branch to the parotid duct was noted and classified accordingly. Results: Buccal branch originated from the lower trunk of facial nerve in 68 % and from the upper trunk in 28% while the two trunks contributed to the origin in 4%. The buccal branch passed inferior to parotid duct in 41% and superior to duct in 25%. In 28%, buccal branch formed a plexus over the duct along with other branches. In 6%, there were two branches, one passed superior and the other passed inferior to the parotid duct. Conclusion: The knowledge regarding the variations of buccal branch of facial nerve can be a surgeon's guide during facial surgeries.