Mandibular dimensions of subjects with asymmetric skeletal Class III malocclusion and normal occlusion compared with cone-beam computed tomography
Mandibular dimensions of subjects with asymmetric skeletal Class III malocclusion and normal occlusion compared with cone-beam computed tomography
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DOI：
10.1016/j.ajodo.2012.03.024
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发表时间：
2012-08-01
影响因子：
3
通讯作者：
Kook, Yoon-Ah
中科院分区：
文献类型：
--
作者：
Lee, HyoYeon;Bayome, Mohamed;Kook, Yoon-Ah
介绍：本研究的目的是使用锥形束计算机断层扫描比较下颌骨尺寸的不对称骨骼III类错牙合和正常牙合。研究方法：使用Invivo软件（Anatomage，圣何塞，加利福尼亚州）对38名正常咬合受试者和28名面部不对称患者的锥形束计算机断层扫描进行评估和数字化。进行了3次正中矢状面和13次左右测量。各组左右侧比较采用配对t检验。采用Mann-Whitney U检验比较正常组与不对称组的正中矢状面变量及两侧之间的差异。结果如下：在不对称的III类患者中，偏斜侧和非偏斜侧的下颌体后部存在显著差异。不对称组下颌支内外倾角和髁突前后倾角的差异显著大于正常组（P = 0.007和P = 0.019）。结论：不对称骨性III类组的髁突高度、升支高度和下颌体后部与正常咬合组相比有显著差异。这些结果可能对不对称III类患者的诊断和治疗计划有用。(Am J Orthod Dentofacial Orthop 2012;142：179-85）
Introduction: The purpose of this study was to use cone-beam computed tomography to compare mandibular dimensions in subjects with asymmetric skeletal Class III malocclusion and those with normal occlusion. Methods: Cone-beam computed tomography scans of 38 subjects with normal occlusion and 28 patients with facial asymmetry were evaluated and digitized with Invivo software (Anatomage, San Jose, Calif). Three midsagittal and 13 right and left measurements were taken. The paired t test was used to compare the right and left sides in each group. The Mann-Whitney U test was used to compare the midsagittal variables and the differences between the 2 sides of the group with normal occlusion with those of asymmetry patients. Results: The posterior part of the mandibular body showed significant differences between the deviated and nondeviated sides in asymmetric Class III patients. The difference of the asymmetry group was significantly greater than that of the normal occlusion group for the mediolateral ramal and the anteroposterior condylar inclinations (P = 0.007 and P = 0.019, respectively). Conclusions: The asymmetric skeletal Class III group showed significant differences in condylar height, ramus height, and posterior part of the mandibular body compared with the subjects with normal occlusion. These results might be useful for diagnosis and treatment planning of asymmetric Class III patients. (Am J Orthod Dentofacial Orthop 2012;142:179-85)