关键词: 儿童, 颌骨囊肿, 开窗引流术

Abstract: Jaw cysts are one of the common lesions in oral and maxillofacial surgery. When the lesion area is extensive, it can damage the adjacent anatomical structures. Especially for jaw cysts in children during the mixed dentition period, more attention should be paid to protecting the adjacent anatomical tissues and the growth and development of the children. This article reports a case of a 9-year-old girl with a jaw cyst. The cyst was large and involved the body of the mandible, the permanent tooth germs (33, 43), and the young permanent teeth (32-42). To remove the cyst, protect jaw and teeth development, a two-stage treatment was adopted: the first stage (decompression stage) involved fenestration decompression, which effectively protected the undeveloped permanent teeth and permanent dental germ (the pulp survival rate was 100% after 1-year follow-up), and reduced the risk of intraoperative fractures (the volume reduction rate of the cyst was 54.41% 6 months after the operation); the second stage (radical treatment stage) was to perform the cyst enucleation after the shrinkage rate of the cyst cavity stopped, and 6 months after the second surgery, cone-beam computed tomography (CBCT) showed that it reached the anatomical healing standard. This case adopted a treatment plan centered on protecting the children's jaw function and growth development, providing a reference for the treatment of children's jaw cysts.

Key words: Children, Jaw cyst, Fenestration decompression