Abstract: Objective　To evaluate the clinical effects of fenestration decompression and cyst plug in treatment of jaw cystic lesions.Methods 61 cases of jaw cystic lesions, diagnosed by pathological examination of partial tissue resection, were treated with fenestration decompression and cyst plug by the 1 cm * 1.5 cm ~ 1.5 cm * 1.5cm window opening into the cystic cavity. During the follow-up period of 1～3 years, bone regeneration and prognosis were observed in all patients. Results All cases were cured. There were no severe complications, such as hemorrhage, infection, permanent mandibular nerve injury and recurrence after operation in all cases. Their facial appearance and function have improved significantly by clinical examination, and bone regeneration was in good condition by oral panoramic radiographs. Furthermore, jaw cystic lesions disappeared completely in some cases of children.Conclusion Fenestration decompression combined with cyst plug can reduce the size of the jaw cystic lesions, and make cystic lesions disappear in some cases. Moreover, fenestration decompression combined with cyst plug can restore the morphology and function of jaw mostly;it is an effective method for treating jawcystic lesions.

Key words: fenestration decompression, jaw cystic lesion, cyst plug, curative effect