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《Journal of Modern Medicine & Health》 2018-06
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Study on lower incisor alveolar bone changes after mask front traction in adolescent patients with mild and moderate skeletal class Ⅲ malocclusion

REN Xiaohua;HAN Hongjunan;TANG Na;WU Hao;Department of Stomatology,Sichuan Provincial Academy of Medical Sciences/Sichuan Provincial People′s Hospital;  
Objective To compare the lower incisor alveolar bone changes after mask front traction in adolescent patients with mild and moderate skeletal class Ⅲ malocclusion. Methods Twenty adolescent patients with mild to moderate skeletal class Ⅲ malocclusion in this department during 2014—2017 were selected. After conducting the mask front traction in all cases,the lower incisor alveolar height,apex alveolar thickness,root-labial-lingual side thickness and height of labial alveolar thinnest point were measured before and after treatment by the head side X-ray film examination and performed the statistical analysis. Results The related indexes of lingual side alveolar height of lower incisor were enlarged,after treatment,there was statistical difference between the occlusion side alveolar height of lower anterior teeth and labial side alveolar height of lower anterior teeth at alveolar thinnest point(P0.05);the distance from mesiocclusion buccal cusps of mandibular first molar to incisor point of lower incisor teeth and the distance from the incisor point of lower anterior teeth to mandibular surface had statistical difference between before and after treatment(P0.05).The distance from the incisor point of lower incisor teeth to mandibular surface was enlarged,while the distance from the mesiocclusion buccal cusps of first lower molar to incisor point of lower anterior teeth was decreased. Conclusion The lingual side of lower anterior teeth is vertically shifted and the apex alveolar thickness of lower anterior teeth has no obvious change after front traction.
【Fund】: 四川省卫生厅资助项目(16PJ473)
【CateGory Index】: R783.5
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