结论正畸治疗前必须了解患者下颌处于正中关系时的咬合情况，发现与下颌位置之间的不协调。
Conclusions the occlusion in centric jaw relation should be analysed before treatment to reveal the disharmony between occlusion and jaw position.
目的：探讨牙周炎伴牙列拥挤病人在常规牙周治疗和正畸治疗后的牙周改善情况。
AIM: To observe the effects of periodontal and orthodontic treatment on patients of periodontitis with crowding and occlusal traumatic teeth.
近半数人对正畸治疗费用、疼痛等情况的了解不多，但绝大多数人知道正畸治疗会影响美观。
Nearly half of people knew little about orthodontic treatment costs, pain and other conditions, but most people knew that orthodontic treatment would affect the appearance.
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