The treatment time and anchorage loss are not influenced by the type of bracket used. There are significant dental and skeletal changes among adolescent orthodontic patients regardless of the bracket used. There is significantly greater lingual inclination of mandibular incisors in the CB group than in the SLB group.

Abstract Background: The main treatment method of the primary aneurysmal bone cyst (ABC) is to curettage and bone grafts with high-speed burring, radiotherapy, sclerotherapy, arterial embolism and hormone therapy can be used for the lesions whose location cannot be easily exposed by the surgery. Regardless of the method, high recurrence rates are a common problem. The purpose of this study was to evaluate retrospectively the use of titanium elastic nails as a internal fixation in the treatment of aneurysmal bone cysts in children.Methods: Children with histological primary aneurysmal bone cyst were evaluated between 2010 to 2017. The patients were divided into 2 groups according to the treatment plan. Patients in the study group operated with curettage and bone grafts with high-speed burring + internal fixation of titanium elastic nails (TEN), and patients in the control group operated with curettage and bone grafts with high-speed burring. The curative effect of the children in the 2 groups were analyzed statistically according to the imaging results (Neer grading) and MSTS functional evaluation.Results: A total of 26 ABC patients (mean 6.5 years at surgery; 21 males;5 female) met the inclusion criteria and were evaluated between 2010 to 2017 after a mean follow-up of 5.2 years (range, 2.5-8.4 years), 16 of which in the study group and 10 in the control group. 9 of the 26 patients recurred (3 cases study group；6 in the control group；). According to the imaging results (Neer grading) and MSTS function evaluation, there was statistically significant difference in the curative effect between the 2 groups (P＜0.05). The recurrence cases in the study group had a better MSTS functioncal recovery.Conclusion: The use of TEN can significantly improve the cure rate, reduce the recurrence rate and improve the quality of life for children with primary aneurysmal bone cyst.