Clinical evaluation and analysis of influencing factors of decompression in large cystic lesions of the jaws

Objective To evaluate the effect of decompression treated large cystic lesions of the jawsand analyze the influencing factors. Methods With the panoramic radiographs, the cysts size were measured before and after de⁃ compression in 6 dentigerous cysts (DC), 9 keratocystic odontogenic tumors (KTOC) and 10 unicystic ameloblastomas (UA). The reduction rate in the three cystic groups was calculated. Relationships between the age of the patient, the ini⁃ tial size of the cyst and the reduction rate were also analyzed. Results The reduction size of the three types of cysts at 6 months after decompression: DC group 60.73% ± 7.15%, KTOC group 60.99% ± 4.00%, UA group 59.25% ± 6.81%. There was no difference in their reduction rate between the three types of cysts (P＞0.05). However, there was a statisti⁃ cally meaningful relationship between the initial size of the lesion and the absolute reduction rate in the UA and KOTC group (UA group: P＜0.01, R＝0.99; KTOC group: P＜0.01, R＝0.86). There was also a significant relationship be⁃ tween the age of the patient and the absolute reduction rate in the DC and UA groups (DC group: P＜0.01, R＝0.99; UA group: P＜0.01, R＝0.99). Conclusion There was no difference in the reduction in size due to decompression be⁃ tween the three types of cysts. However, the age of the patient and the initial size of the lesion showed a significant rela⁃ tionship with the reduction rate.