Correction of the transverse discrepancy-induced spontaneous mandibular protrusion in Class II Division 1 adolescent patients
Correction of the transverse discrepancy-induced spontaneous mandibular protrusion in Class II Division 1 adolescent patients
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II类1区青少年患者横向差异引起的自发性下颌前突的矫正
DOI：
10.21307/aoj-2020-122
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发表时间：
2016-01
影响因子：
--
通讯作者：
Li Wen
中科院分区：
文献类型：
--
作者：
Yu Yanfang;Wu Mengjie;Chen Xuepeng;Li Wen
摘要背景安氏II类错是正畸治疗中最常见的矢状面骨性不协调。横弓间差异（TID）可能被认为是II类关系的可能功能原因。目的探讨正畸治疗前后牙弓间宽度的变化及其与下颌前突度的关系。方法将40例青少年患者分为两组，一组有横向不等长，另一组无横向不等长。测量治疗前后牙弓宽度差（包括ICWD、IPWD、IMWD、IAWD）及鼻根点（N）垂线（Pog）。结果治疗前两组牙弓宽度、牙槽宽度（包括ICWD、IPWDI、IPWDII、IMWD、IAWD）比较，差异有统计学意义（p < 0.05）。两组间Pog与N垂直的比较显示，横向不等长组治疗后下颌前伸量为2.6 ± 1.3 mm，无横向不等长组治疗后下颌前伸量为0.6 ± 0.3 mm，统计学比较差异有显著性（p < 0.01）。结论牙弓间横向差异可能与下颌骨重建有一定的关系。如果通过正畸治疗矫正横向差异，下颌骨可能会自发地突出。
Abstract Background A Class II malocclusion is the most frequent sagittal skeletal disharmony presenting for orthodontic treatment. A transverse interarch discrepancy (TID) may be considered as a possible functional cause of a Class II relationship. Objective The purpose of the present study was to determine transverse interarch width dimensions before and after orthodontic therapy and their possible relationship with increased mandibular projection following treatment. Methods The sample included 40 adolescent patients who were divided into two groups, one possessing and one without a transverse discrepancy. Interarch width differences (including ICWD, IPWD, IMWD, IAWD) were measured before and after treatment, and Pogonion (Pog) to Nasion (N) perpendicular was similarly measured in each group. Results The differences in arch and alveolar width dimensions between the two groups (including ICWD, IPWDI, IPWDII, IMWD, IAWD) before treatment were statistically significant (p < 0.05). A comparison of Pog to N perpendicular between the two groups showed that mandibular protrusion after treatment in the transverse discrepancy group was 2.6 ± 1.3 mm, while mandibular protrusion after treatment in the group without a transverse discrepancy was 0.6 ± 0.3 mm. The statistical comparison showed that the differences were significant (p < 0.01). Conclusion A transverse interarch discrepancy may have a functional relationship with mandible retrusion. If a transverse discrepancy is corrected via orthodontic treatment, the mandible may spontaneously protrude.
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影响因子：
4.2
作者：
A. J. Haas
通讯作者：
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DOI：
10.1043/0003-3219(2005)75
发表时间：
2005-11
期刊：
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A. Gurton;E. Akin;Ş. Karaçay
影响因子：
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