Evaluation of Two Bone Anchored Appliances During En Masse Distalization of Maxillary Buccal Segment with Class II Patients; A Comparative Clinical Study

Objective: to assess quality of orthodontic tooth movement during distalization by two different skeletally anchored distalizing appliances. Patients and methods: the current study was applied on 22 orthodontic patients with class ΙΙ molar relationship. Patients were divided into two active groups; group Ι: include 11 patients treated by modified sagittal screw distalizer and group ΙΙ: include 11 patients treated by modified distal jet distalizer. Quality of distalization was assessed by the following measurements; first and second premolars root horizontal distance (mm), first and second molars root horizontal distance(mm), SNA, SNB, U1 to FH. Results: The highest change (%) in first molar root horizontal distance (mm) was recorded in group II with a decrease by -11.5 % in the left side and -11.4 % in the right side. Conclusion: Bone anchored Distal Jet and modified Sagittal screw distalizer provide an effective tool for treating mild to moderate class II malocclusion. But the modified distal jet produces high quality of distalization than the modified Sagittal screw distalizer.