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[Non-extraction approach using RPE to correct Angle Class I malocclusion with moderate crowding: A cephalometric
Fang-fang Gong1, Jing Lu, Gang Shen
1Department of Orthodontics, Ninth People's Hospital, School of Stomatology, Shanghai Second Medical University, Shanghai 200011, China. ffgong@citiz.net
Shanghai Kou Qiang Yi Xue = Shanghai Journal of Stomatology
|December 28, 2004
Summary
Rapid palatal expansion (RPE) effectively increased maxillary transverse width in Angle Class I malocclusion patients. This orthodontic treatment without extraction showed no significant anteroposterior changes.
Area of Science:
- Orthodontics
- Craniofacial Development
- Dental Arch Dimensions
Background:
- Angle Class I malocclusion with moderate crowding presents challenges in orthodontic treatment planning.
- Non-extraction approaches are often preferred to maintain dental arch integrity.
- Rapid palatal expansion (RPE) is a common method for maxillary transverse expansion.
Purpose of the Study:
- To evaluate cephalometric changes in Angle Class I malocclusion with moderate crowding treated orthodontically without extraction using RPE.
- To assess the effects of RPE on transverse and anteroposterior dimensions.
Main Methods:
- A cohort of 9 patients with Angle Class I moderate crowding underwent non-extraction orthodontic treatment utilizing RPE and fixed edgewise appliances.
- Cephalometric analysis was conducted at three time points: pretreatment (T1), 3 months post-RPE (T2), and after active treatment retention (T3).
Main Results:
- Significant increases in lateronasal width, maxillary width, and upper/lower first molar width were observed post-RPE and post-treatment.
- Total facial height, upper anterior facial height, palatal plane inclination, and Y-axis increased significantly.
- Significant differences in mandibular plane inclination were noted across the observation periods.
Conclusions:
- Rapid palatal expansion is effective in increasing maxillary transverse width.
- RPE treatment in this cohort did not appear to induce significant anteroposterior skeletal changes.