## **Core Concept**
The Caldwell-Luc operation is a surgical procedure used to treat chronic maxillary sinusitis, antrochoanal polyps, and other conditions affecting the maxillary sinus. It involves creating an opening in the anterior wall of the maxillary sinus through the upper jaw (canine fossa) to allow drainage and ventilation of the sinus. A key aspect of this surgery is the potential for complications due to its invasive nature.

## **Why the Correct Answer is Right**
The correct answer, **Anesthesia of the cheek**, is a well-recognized complication of the Caldwell-Luc procedure. This occurs because the infraorbital nerve, which provides sensation to the cheek, can be damaged during the surgery. The infraorbital nerve is located in the vicinity of the surgical site and is at risk of injury when the anterior wall of the maxillary sinus is accessed through the canine fossa.

## **Why Each Wrong Option is Incorrect**
- **Option A:** While infection is a potential complication of any surgical procedure, including the Caldwell-Luc operation, it is not specifically related to the anatomical structures directly affected by this surgery in a unique way that distinguishes it from other complications.
- **Option B:** Orbital complications could occur due to the proximity of the maxillary sinus to the orbit, but they are not the most common complication of this procedure.
- **Option D:** Though dental complications can arise, they are not the most frequently encountered issue with this surgery.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the Caldwell-Luc procedure, while effective for certain conditions, carries a risk of damaging the infraorbital nerve, leading to cheek anesthesia. This complication underlines the importance of careful surgical technique and preoperative planning to minimize risks.

## **Correct Answer:** . Anesthesia of the cheek