Paediatric Dentistry and Orthodontics Department, Rey Juan Carlos University, Madrid, Spain.
Ir J Med Sci. 2014 Sep;183(3):357-62. doi: 10.1007/s11845-013-1020-0. Epub 2013 Oct 6.
Evaluate condylar, ramal, and condylar plus ramal vertical mandibular asymmetry in patients with unilateral posterior crossbite (UPCB) and in patients with unilateral cleft lip and palate (UCLP) compared with subjects having normal occlusion.
This cross-sectional study evaluated panoramic radiographs of three groups of subjects: UPCB, 20 patients; UCLP, 20 patients; and normal occlusion sample, 20 subjects. All subjects were picked at random from Rey Juan Carlos University, Madrid, and all films were traced and measured manually by the same author.
Kruskal-Wallis test revealed no statistically significant differences (P < 0.05) in condylar asymmetry index (CAI), ramal asymmetry index (RAI), and condylar plus ramal asymmetry index (C + RAI) among the three groups. The average CAI for group UPCB was 9.03 ± 7.65; 8.03 ± 6.89 for group UCLP; 6.93 ± 9.87 for normal group. Mean RAI for group UPCB was 2.53 ± 2.52; 2.61 ± 1.22 for group UCLP; 2.65 ± 1.90 for normal group.
Condylar asymmetry was observed in all three groups (UPCB, UCLP and normal occlusion) because condylar asymmetry indexes were higher in each group at the 3 % threshold. No statistically significant differences were found among the three study groups for any of the asymmetry indexes.
评估单侧后牙反（UPCB）患者和单侧唇腭裂（UCLP）患者与正常牙合患者的髁突、下颌支和髁突加下颌支的垂直下颌骨不对称性。
本横断面研究评估了三组受试者的全景片：UPCB，20 例；UCLP，20 例；正常牙合样本，20 例。所有受试者均随机选自马德里雷胡安卡洛斯大学，所有片子均由同一位作者进行追踪和手动测量。
Kruskal-Wallis 检验显示三组之间的髁突不对称指数（CAI）、下颌支不对称指数（RAI）和髁突加下颌支不对称指数（C+RAI）无统计学差异（P<0.05）。UPCB 组的平均 CAI 为 9.03±7.65；UCLP 组为 8.03±6.89；正常组为 6.93±9.87。UPCB 组的平均 RAI 为 2.53±2.52；UCLP 组为 2.61±1.22；正常组为 2.65±1.90。
所有三组（UPCB、UCLP 和正常牙合）均观察到髁突不对称性，因为每组的髁突不对称指数在 3%的阈值下均较高。三个研究组之间在任何不对称指数上均无统计学差异。
