ABSTRACT
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 decompression 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 initial 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 statistically 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 between 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 between the three types of cysts. However, the age of the patient and the initial size of the lesion showed a significant relationship with the reduction rate.