Ectopic Tooth in the Maxillary Sinus With Odontogenic Keratocyst: Treated by Caldwell-luc Surgery and Bone Lid Technique.

Odontogenic keratocysts (OKCs) are an invasive type of odontogenic cyst that rarely occurs in the maxilla. This article presents a case of OKC complicated with ectopic teeth occurring in the maxillary sinus. This article collects a case of a 19-year-old female patient with an ectopic tooth in the maxillary sinus associated with an OKC. The physician opted for the Caldwell-Luc approach to remove the ectopic tooth, the cyst, and the affected mucosa. Concurrently, the bone fragment at the window site was repositioned by applying the bone lid technique after the lesion had been cleared. Postoperative follow-up revealed that the bone fragment had achieved good continuity, effectively reconstructing the anatomical form of the lateral maxillary sinus wall. To clear the large sinus contents and the affected mucosa, physicians may employ the Caldwell-Luc approach combined with a bone lid technique for maxillary sinus antrostomy. Treated by Caldwell-Luc surgery and bone lid technique, the surgical field can be fully exposed, facilitating the surgeon's removal of the affected mucosa and cyst. Moreover, the bone fragments can be repositioned precisely after the lesion is cleared and normal facial features can be restored after bone reconstruction.