Incisor retraction and profile changes in adult patients.
Incisor retraction and profile changes in adult patients.
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发表时间：
1994
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通讯作者：
Valentim Zl;J. CapelliJúnior;Almeida Ma;Bailey Lj
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作者：
Valentim Zl;J. CapelliJúnior;Almeida Ma;Bailey Lj
本研究的目的是评估与上颌切牙退缩有关的面部轮廓的变化，并检查在正畸治疗过程中唇的变化和牙齿和牙槽骨的位置变化之间的相关性。本研究选择了25例非生长期巴西患者的初始和最终侧位头影测量X线片。所有患者最初表现为I类或II类错牙合畸形，在正畸治疗期间，他们的上颌切牙缩回至少2 mm。计算嘴唇位置、长度和宽度的变化，以及牙槽骨和门牙位置的变化。除上唇长度和A点外，所有测量值从治疗前到治疗后均观察到统计学显著性差异。下唇沟的变化与B点之间以及下唇沟的变化与下颌切牙之间具有高度相关性。上颌和下颌切牙的变化并没有表现出高度的相关性，总唇的变化，但高相关系数时，唇宽度的变化被排除在总唇的变化。换句话说，唇宽的变化往往掩盖了上颌切牙退缩引起的唇位变化。
The aims of this study were to evaluate the changes in the facial profile related to maxillary incisor retraction and to check for correlations between changes in the lip and changes in the positions of the teeth and alveolar bone during orthodontic treatment. Initial and final lateral cephalometric radiographs of 25 nongrowing Brazilian patients were selected for this study. All patients initially presented with Class I or II malocclusions and had their maxillary incisors retracted at least 2 mm during orthodontic treatment. Changes in lip position, length, and width, as well as changes in the positions of the alveolar bones and incisors, were calculated. Statistically significant differences from pretreatment to posttreatment were observed for all measurements except for upper lip length and point A. A high correlation was demonstrated between changes in the lower lip sulcus and point B and between changes in the lower lip sulcus and the mandibular incisor. Changes in the maxillary and mandibular incisors did not show a high correlation to the total lip changes, but high correlation coefficients were obtained when the changes in lip width were excluded from the total lip changes. In other words, changes in lip width tended to mask the changes in lip position caused by retraction of the maxillary incisors.