Alveolar bone morphology in patients with a unilateral palatally displaced maxillary lateral incisor: A cone-beam computed tomography study
Alveolar bone morphology in patients with a unilateral palatally displaced maxillary lateral incisor: A cone-beam computed tomography study
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单侧上颌侧切牙移位患者的牙槽骨形态：锥束计算机断层扫描研究
DOI：
10.1016/j.ajodo.2019.07.011
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发表时间：
2020-07-01
影响因子：
3
通讯作者：
Ono, Takashi
中科院分区：
文献类型：
--
作者：
Okuzawa-Iwasaki, Makiko;Ishida, Yuji;Ono, Takashi
前言：上颌前牙的舌向移位是错牙合畸形最常见的形式之一。上颌侧切牙的唇侧牙槽骨比中切牙和尖牙薄;然而，上颌侧切牙实际位置处的牙槽骨宽度尚未进行检查。我们利用锥形束电脑断层摄影术及裂口模型，探讨腭侧移位上颚侧门齿周围齿槽骨的形态特征。方法：27例单侧上颌侧切牙腭侧移位的患者。使用锥形束计算机断层扫描记录3个节段（即牙根长度的25%、50%和75%）的轴向、矢状和水平测量值。采用配对t检验对所得数据进行统计学分析。结果：患侧唇侧牙槽骨宽度在牙根长度的25%处明显小于患侧。在所有的3个水平，一条线之间的距离切向唇牙槽骨的中切牙和犬齿和唇牙槽骨的位置的侧切牙是显着更大的受影响的一面。在牙根长度的50%和75%处，患侧后鼻棘与侧切牙唇侧牙槽骨之间的水平距离显著较小。结论：上颌侧切牙的腭部移位与根尖水平的牙槽骨宽度减小和不对称性显著相关。然而，有必要进行进一步的详细调查，以确定该研究的临床相关性。
Introduction: Lingual displacement of the maxillary anterior teeth is 1 of the most common forms of malocclusion. The labial alveolar bone is thinner for the maxillary lateral incisor than for the central incisor and canine; however, the alveolar bone width at the actual position of the maxillary lateral incisor has not been examined. We investigated the morphologic characteristics of the alveolar bone around palatally displaced maxillary lateral incisors using cone-beam computed tomography and a split-mouth model. Methods: Twenty-seven patients with a unilateral palatally displaced maxillary lateral incisor were included. Axial, sagittal, and horizontal measurements were recorded at 3 levels (ie, 25%, 50%, and 75% of the root length) using cone-beam computed tomography. All obtained data were statistically analyzed using paired t tests. Results: The labial alveolar bone width at 25% of root length was significantly lesser on the affected side. At all 3 levels, the distance between a line tangential to the labial alveolar bone of the central incisor and canine and the position of the labial alveolar bone of the lateral incisor was significantly greater on the affected side. At 50% and 75% of root length, the horizontal distance between the posterior nasal spine and the labial alveolar bone of the lateral incisor was significantly lesser on the affected side. Conclusions: Palatal displacement of maxillary lateral incisors is significantly associated with decreased alveolar bone width at the apical level and asymmetry. However, a further elaborate investigation is necessary to determine the clinical relevance of the study.