The Effectiveness Of Decompression For Patients With Different Cystic Lesions Of The Jaw

Objective:Jaw cystic lesions are common diseases in the oral and maxillofacial regions.Since there are usually no clinical symptoms in the early stage of the disease,the patient is not easily aware of it.The patient usually comes to the clinic when the disease involve in important tissue structures or facial deformities.Larger,bone destruction is more serious.At present,the decompression as a conservative treatment of surgical methods,due to the advantages of simple operation,less trauma,and good healing of postoperative lesions,has attracted more and more attention of clinicians.The aim of this study was to evaluate the clinical effectiveness of decompression as the primary treatment of odontogenic cystic lesions of the jaw involving factors that affect shrinking speed,such as the initial size of the lesion and the age of the patient.Methods:A total of 30 patients with odontogenic cystic lesions of the jaw underwent decompression with customized thermoplastic resin stents,consist of 5 dentigerous cysts(DCs),13 keratocystic odontogenic tumors(KTOCs),and 12 unicystic ameloblastoma(UAs)cases,pre-and postdecompression CBCTs were analyzed.Results:The relative speed of shrinkage of dentigerous cysts(DCs;10.77%/month)was faster than those of keratocystic odontogenic tumors(KTOCs;5.59%/month)and unicystic ameloblastomas(UABs;5.52%/month).The relative shrinking size increased linearly in a time-dependent manner for DCs(r=0.124,P=0.843),KTOCs(r=0.634,P=0.002),and UABs(r=0.726,P=0.008);a similar relation was detected between the primary radiolucent area of cystic lesions before decompression and relative shrinking speed after decompression in KTOCs(r=0.787,P=0.001),and UABs(r=0.766,P=0.004),but patient age did not affect the relative speed of shrinkage(P >0.05),except for UABs(r=-0.629,P=0.028).Conclusion:Decompression was effective in treating odontogenic cystic lesions of the jaw.The velocity of shrinkage after decompression was faster in DCs than in KTOCs or UABs.The age of the patient and the initial size of the lesion showed a significant relationship with the speed of healing.For DCs,the best time to secondary curettage is 8 months after decompression,KTOCs for 15 months and for UABs 11 month.