Final answer:
In a Caldwell-Luc procedure, the Kerrison rongeur is used to expand the antrostomy. It allows for precise bone removal and is crucial for the success of this maxillary sinus surgery.
Step-by-step explanation:
The rongeur used to expand the antrostomy in a Caldwell-Luc procedure is the Kerrison rongeur. Caldwell-Luc surgery, Caldwell-Luc operation, also known as Caldwell-Luc antrostomy, and Radical antrostomy, is an operation to remove irreversibly damaged mucosa of the maxillary sinus. It is done when maxillary sinusitis is not cured by medication or other non-invasive technique. The Caldwell-Luc procedure is a type of surgery performed to access the maxillary sinus by creating an opening in the upper jaw above the teeth. The Kerrison rongeur is specifically designed to remove bone in a precise and controlled manner, which is essential for expanding the antrostomy without causing damage to the surrounding structures. This surgical instrument has a curved, spoon-like tip that is used to remove bone and tissue in a controlled manner.