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中华口腔医学研究杂志(电子版) ›› 2008, Vol. 02 ›› Issue (01) : 67 -74. doi: 10.3877/cma.j.issn.1674-1366.2008-01-013

临床研究

Twin-block 矫治器治疗下颌后缩安氏Ⅱ1 类错 儿童咬肌厚度变化
马迅1, 王大为1,(), 蔡斌1, 林熙1, 朱双林1, 王洋1   
  1. 1. 510055 广州,中山大学光华口腔医院·附属口腔医院正畸科
  • 收稿日期:2008-01-05 出版日期:2008-02-01
  • 通信作者: 王大为

Masseter muscle thickness changes with twin-block appliance in children with class II division 1 malocclusion and mandibular retrusion

Xun MA1, Da-wei WANG1,(), Bin CAI1, Xi LIN1, Shuang-lin ZHU1, Yang WANG1   

  1. 1. Department of Orthodontics, Hospital of Stomatology, SUN Yat-sen University, Guangzhou 510055, China
  • Received:2008-01-05 Published:2008-02-01
  • Corresponding author: Da-wei WANG
引用本文:

马迅, 王大为, 蔡斌, 林熙, 朱双林, 王洋. Twin-block 矫治器治疗下颌后缩安氏Ⅱ1 类错 儿童咬肌厚度变化[J/OL]. 中华口腔医学研究杂志(电子版), 2008, 02(01): 67-74.

Xun MA, Da-wei WANG, Bin CAI, Xi LIN, Shuang-lin ZHU, Yang WANG. Masseter muscle thickness changes with twin-block appliance in children with class II division 1 malocclusion and mandibular retrusion[J/OL]. Chinese Journal of Stomatological Research(Electronic Edition), 2008, 02(01): 67-74.

目的

研究Twin-block 矫治器 (TB) 治疗下颌后缩安氏Ⅱ1 类错儿童咬肌(masseter muscle,MM)厚度变化。

方法

选取下颌后缩安氏Ⅱ1 类错儿童15 例,分为TB 治疗组和对照组。 采用超声成像技术测量0、1、3、6 个月两组受试者姿势位及紧咬位MM 厚度, 计算各指标均值和厚度不对称性指数,并比较组间及组内在不同时间相应指标的差异。

结果

①TB 治疗过程中,MM 在姿势位及紧咬位厚度先减小后增大,具有统计学意义;②MM 厚度不对称性指数显著性下降,肌肉不平衡性改善。

结论

TB能消除异常肌功能状态,去除错形成的不利因素,改善口颌肌肉协调性,是一种良好的肌肉训练装置。

Objectives

To evaluate the change of thickness of masseter muscle (MM) before and after treatment with Twin-block (TB) appliance in children with Class Ⅱdivision 1 malocclusion and mandibular retrusion.

Methods

Fifteen children with Class Ⅱmalocclusion and retruded mandible were selected and divided into the TB treatment group and the control group. By using ultrasonography, the thickness of bilateral masseter muscles was measured at mandibular postural position (MPP) and at maximal voluntary clenching position (MCP) after 0,1,3,6 months for both groups respectively. Statistical analysis was performed to compare the means of the corresponding parameters and the AILCSD (asymmetry index of local cross-sectional dimension) of masseter muscles between groups, as well as the parameters among 0,1,3,6 months in each group.

Results

①MM thickness at MPP and MCP during the treatment decreased first and then increased with statistical significance; ②AILCSD of MM decreased significantly and compensated the imbalance of MM.

Conclusions

TB appliance is a muscular training device to eliminate the muscular abnormal function and disadvantage of malocclusion, which improves the coordination of the oral-maxillofacial muscles.

图1 浅层咬肌解剖示意图及参考平面
图2 超声界面
表1 对照组与试验组(不戴TB)治疗前各位置咬肌厚度比较(±s) mm
图3 对照组与试验组(不戴TB)治疗前各位置咬肌厚度
表2 对照组与试验组(不戴TB)不同时段MPP 位MM 厚度比较(±s) mm
图4 对照组与试验组(不戴TB)不同时段MPP 位咬肌厚度比较 * P<0.05
表3 对照组与试验组(不戴TB)不同时段MCP 位MM 厚度比较(±s) mm
图5 对照组与试验组(不戴TB)不同时段MCP 位咬肌厚度比较 * P<0.05
表4 试验组不戴TB 与戴TB 不同时段MPP 位MM 厚度比较(±s) mm
图6 试验组(不戴TB)与试验组(戴TB)不同时段MPP位咬肌厚度比较 * P<0.05
表5 试验组不戴TB 与戴TB 不同时段MCP 位MM 厚度比较(±s) mm
图7 试验组(不戴TB)与试验组(戴TB)不同时段MCP位咬肌厚度比较 * P<0.05
表6 对照组与试验组(不戴TB)不同时段咬肌的AILCSD 比较(±s)
图8 对照组与试验组(不戴TB)不同时段MPP 位咬肌的AILCSD 比较 * P<0.05,**P<0.01
图9 对照组与试验组(不戴TB)不同时段MCP 位咬肌的AILCSD 比较 * P<0.05,**P<0.01
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