Orthodontics, University of Seville, Spain.
Med Oral Patol Oral Cir Bucal. 2013 May 1;18(3):e547-52. doi: 10.4317/medoral.18291.
The anatomy of dental compensation curve in the frontal plane described by George H. Wilson is one of the occlusal determinants of orthodontic treatment. However, there is few published comparing malocclusion and normocclusion individuals.
The aim of this study is to compare the curve of Wilson at first and second maxillary molars, normocclusion pattern and malocclusion pattern, with and without bilateral posterior crossbite, using angular references in CBCT studies.
We analyzed 10 cases of malocclusion with bilateral posterior crossbite, 10 cases of malocclusion without bilateral posterior crossbite and 10 cases with non orthodontic normocclusion (patients who underwent cone beam study for other reasons than orthodontic). All of them were adults, more than 19 years. Angular variables from left and right axis (line connecting the occlusal and furcation groove) of first and second molars towards a perpendicular to the frontal palate were measured. There was carried out an Anova test, Bonferroni analysis and Levene's statistics.
The descriptive analysis of the results shows an average values of total maxillary curve of Wilson for first molars (sum of left and right angle) of 8.1° for normocclusion group, 0.4° for the malocclusion pattern with bilateral posterior crossbite and 16.9° for the malocclusion pattern without this alteration. The mean differences was statistical significant (P<0,042) between between malocclusion pattern groups with and without crossbite .
The curve of Wilson, measured at maxillary first molars in patients with bilateral posterior crossbite is more concave than the other groups, suggesting no dentoalveolar compensations.
由 George H. Wilson 描述的额平面牙科补偿曲线的解剖结构是正畸治疗的咬合决定因素之一。然而，发表的关于比较错颌畸形和正常颌个体的文献很少。
本研究旨在比较 CBCT 研究中使用角度参考的正常咬合模式和错颌畸形模式以及有无双侧后牙反颌时，Wilson 第一和第二上颌磨牙的曲线。
我们分析了 10 例双侧后牙反颌的错颌畸形病例，10 例无双侧后牙反颌的错颌畸形病例和 10 例非正畸正常（因正畸以外的其他原因接受锥形束研究的患者）。所有患者均为成年人，年龄超过 19 岁。测量第一和第二磨牙左右轴（连接咬合和分叉沟的线）相对于额面垂直的角度变量。进行了方差分析、Bonferroni 分析和 Levene 统计。
结果的描述性分析显示，正常组上颌总 Wilson 曲线第一磨牙（左右角度之和）的平均值为 8.1°，双侧后牙反颌错颌组为 0.4°，无此改变的错颌组为 16.9°。差异具有统计学意义（P<0.042）。
在双侧后牙反颌的患者中，测量上颌第一磨牙的 Wilson 曲线比其他组更凹，表明没有牙牙槽骨补偿。
