Which procedure involves an incision under the upper lip?

• A. Antral irrigation
• B. Caldwell-Luc procedure
• C. Endoscopic sinus surgery
• D. Nasal saline irrigation

Answer: (B)

The procedure that involves an incision under the upper lip is the Caldwell-Luc procedure. This surgical technique is primarily used to treat chronic conditions related to the maxillary sinus, such as infections or the removal of obstructions. The incision allows the surgeon to access the maxillary sinus through the canine fossa, which is located just beneath the upper lip, facilitating drainage or the removal of any diseased tissue.

Other procedures listed do not involve such an incision. Antral irrigation typically involves flushing out the sinus cavity but does not require surgical access through the lip. Endoscopic sinus surgery employs a minimally invasive approach using a camera and instruments inserted through the nose, without incisions on the face. Nasal saline irrigation is a non-invasive method where saline is used to clear nasal passages and sinuses, and it does not necessitate any surgical incision at all. Thus, the Caldwell-Luc procedure specifically stands out with its unique approach involving an incision under the upper lip.