改良颊侧多曲簧矫治器纠正早期安氏III类错牙合伴下颌偏斜(1)
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[摘要]目的：通过头颅定位后前位片测量，探讨改良颊侧多曲簧活动矫治器纠正早期安氏III类错牙合且伴下颌功能性偏斜，改善早期功能性下颌偏斜。方法：混合牙列早期安氏III类错牙合且伴有下颌功能性偏斜患者20例，采用改良颊侧多曲簧活动矫治器的方法，矫治前后头颅定位后前位片P-A测量分析，用统计软件处理数据。结果：改良颊侧多曲簧活动矫治器矫正早期安氏III类错牙合且伴有下颌功能性偏斜后，下颌骨两侧结构不对称性有明显改善，下颌骨两侧综合长度差亦减小(P<0.01)，两侧下颌体长度差明显减小(P<0.01)。结论：由于早期安氏III类错牙合且伴有单侧后牙反牙合，导致的功能性下颌偏斜，采用改良颊侧多曲簧活动矫治器，可以使下颌骨的不对称得到一定的改善，是早期纠正下颌功能性偏斜的有效手段。
[关键词]改良颊侧多曲簧活动矫治器；安氏III类错牙合；单侧后牙反牙合；下颌偏斜
[中图分类号]R783.5 [文献标识码]A [文章编号]1008-6455(2012)02-0289-03
Early the class Ⅲ malocclusion with mandible deviation corrected by the improved Buccal Multiloop removable appliance
WANG A-na1,HOU Lu2,ZHAO Xing1,YIN Ming-jing3,LIANG Xue1
(1.Department of Stomatology ,The Facial Feature Hospital of Qiqihar,Qiqihar 161006,Heilongjiang,China;2.Department of Orthodontics,The Second Affiliated Hospital of Harbin Medical University;3.Department of Stomatology,The Third Affiliated Hospital of Harbin Medical University)
Abstract: Objective To confirm that correction of the class Ⅲ malocclusion with mandible deviation through the improved Buccal Multiloop removable appliance is associated with a change in early functional mandible deviation was the purpose of this Study. Methods 20 the class Ⅲ malocclusion of mixed dentitions with mandible deviation were treated by improved Buccal Multiloop removable appliance for correction of anterior crossbite and unilateral posterior crossbite.Pretreatment and posttreatment tomograms were available for 20 of the patients.All data was analysed by SPSS statistical software. Results After the correction of the class Ⅲ malocclusion of mixed dentitions with mandible deviation by improved Buccal Multiloop removable appliance,craniofacial asymmetry improved significantly. Conclusion According to this study,early treatment of the class Ⅲ malocclusion with mandible deviation were treated by improved Buccal Multiloop removable appliance is indicated to improve early functional mandible deviation.
Key words:improved Buccal Multiloop removable appliance;class Ⅲ malocclusion;unilateral posterior crossbite;mandible deviation
下颌偏斜多见于安氏III类错牙合且伴有单侧后牙反牙合的患者，发病率约3%，多由替牙障碍、口腔不良习惯及遗传等因素引起，但部分学者认为下颌的不对称是由于两侧髁突位置的不对称引起。其中咬合干扰是引起下颌偏斜的原因之一，可引起颌骨的大小及形态的改变，还可引起功能的改变。安氏III类错牙合伴下颌偏斜的治疗最为复杂，不经矫治，可随生长发育逐渐加重，形成骨性偏牙合，所以早期矫治显得尤为重要 ......
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