Efficacy of Mandibular protraction appliance IV versus PowerScope in treatment of class II malocclusion; A comparative, randomized clinical trial | ||||
| Al-Azhar Journal of Dental Science | ||||
| Volume 26, Issue 3, July 2023, Page 427-437 PDF (805.92 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ajdsm.2022.172089.1381 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Abubakr Mohamed Fouad Abd-Elhamid   1; Ezzat Barakat Abdel-Fattah2; Ramadan Yusuf Abu-Shahba3
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| 1Assistant lecturer, Department of Orthodontics, Faculty of Dental Medicine (Boys, Cairo), Al-Azhar University. | ||||
| 2Professor, Department of Orthodontics, Faculty of Dental Medicine (Boys, Cairo), Al-Azhar University. | ||||
| 3Assistant Professor, Department of Orthodontics, Faculty of Dental Medicine (Boys, Cairo), Al-Azhar University. | ||||
| Abstract | ||||
| Objective: To evaluate and compare the efficacy of Mandibular protraction appliance IV (MPA-IV) and PowerScope (PS) in the treatment of skeletal Class II malocclusion patients. Materials and methods: A total of 16 circumpubertal class II patients (ANB° > 4°) with mandibular deficiency were randomly divided equally into two groups; group 1: treated by MPA-IV, their mean age was 14.98 ± 1.33 years, group 2: treated by PS appliance (American Orthodontics, Sheboygan, Wis), their mean age was 14.67 ± 1.37 years. In both groups, fixed functional appliances were installed for six months. Treatment outcomes were assessed by cephalograms taken immediately pre- and post-functional appliances therapy. Results: Intergroup comparisons of the mean treatment changes revealed significant improvements (P ≤ .05) in SNB°, SN-Pog°, Ar-Go-Me°, Co-Gn mm, B-Sv mm, Pog-Sv mm, S-Go mm, and lower lip advancement (Li-Sv mm and Pog’-Sv mm) in MPA-IV group. While in the PS group, there were significant greater decrease of SNA° and upper incisors retraction (P ≤ .05). Conclusion: Both appliances could be used efficiently in the treatment of class II malocclusion. MPA-IV produces superior mandibular advancement and lower lip projection, while the effects of PS are mainly dentoalveolar changes. | ||||
| Keywords | ||||
| Mandibular protraction appliance; PowerScope; fixed functional appliance; class II malocclusion; growth modification | ||||
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