Department of Orthodontics, Pomeranian Medical University, Szczecin, Poland.
Eur J Orthod. 2010 Jun;32(3):313-8. doi: 10.1093/ejo/cjp114. Epub 2009 Dec 16.
The aim of the investigation was to compare overall and anterior Bolton ratios in different malocclusion groups with Bolton's standards. The material comprised 600 pre-treatment study casts (262 males and 338 females, aged 12-25 years), selected from the models of 3088 patients who had applied for orthodontic treatment based on the following criteria: permanent dentition from the first right molar to the first left molar and no interproximal caries or restorations. There were 162 Class I, 144 Class II division 1, 155 Class II division 2, and 139 Class III patients. Statistical analysis of the data was undertaken using a Student's t-test. Statistically significant differences were found for the mean overall ratio when compared with the original Bolton norm for the whole study group, as well as for patients with Class I and III malocclusions when the mean anterior ratio was compared with the original Bolton norm. Significant differences were observed in all malocclusion groups for both genders. Discrepancies exceeding 2 SD were found in 31.2 per cent of the studied population for the anterior ratio when compared with Bolton's norm. The highest mean values for anterior ratio were in males with Class I (79.1) and Class III (80.1) malocclusions.
本研究旨在比较不同错颌畸形组的Bolton 全面比值和前牙Bolton 比值与 Bolton 标准的差异。研究材料为 600 例未经治疗的研究模型（262 名男性和 338 名女性，年龄 12-25 岁），选自 3088 名接受正畸治疗的患者模型，选择标准为：从右侧第一磨牙到左侧第一磨牙的恒牙，无邻面龋或修复。其中安氏Ⅰ类错颌 162 例，安氏Ⅱ类 1 分类错颌 144 例，安氏Ⅱ类 2 分类错颌 155 例，安氏Ⅲ类错颌 139 例。使用学生 t 检验对数据进行统计学分析。与原始 Bolton 标准相比，研究组的总体比值的平均值存在统计学差异，而与原始 Bolton 标准相比，Ⅰ类和Ⅲ类错颌患者的前牙比值的平均值也存在统计学差异。所有错颌畸形组的男女比例均存在统计学差异。与 Bolton 标准相比，研究人群中 31.2%的前牙比值存在超过 2SD 的差异。前牙比值的平均值在安氏Ⅰ类（79.1）和安氏Ⅲ类（80.1）错颌的男性中最高。
