伊朗正畸患者的多生牙。一项回顾性放射学和临床调查。

Supernumerary teeth amongst Iranian orthodontic patients. A retrospective radiographic and clinical survey.

机构信息

Department of Orthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

出版信息

Acta Odontol Scand. 2011 Mar;69(2):125-8. doi: 10.3109/00016357.2010.539979. Epub 2010 Dec 9.

DOI:10.3109/00016357.2010.539979

PMID:21142585

Abstract

OBJECTIVE

To investigate the prevalence, characteristics (malocclusion, location, type) and gender distribution of supernumerary teeth (ST) in an Iranian orthodontic population.

MATERIAL AND METHODS

A retrospective study was carried out using radiographs (periapicals, panoramic) and study models of 1751 subjects (870 girls, 881 boys; age range 9-27 years). The Pearson chi-square test was used to determine differences in the distribution of ST when stratified by gender and malocclusion type.

RESULTS

Fourteen ST were found in 13 patients (six males, seven females), giving a prevalence rate of 0.74%. The prevalence rate of ST was higher in Class III malocclusions (5.2%) and was a rare finding among Class II malocclusions (0.1%). The occurrence rate of ST was higher in maxilla (78.5%) than in mandible (21.5%). The most common type of ST was the conical form (43%). We did not observe any late-developing paramolar or distomolar ST.

CONCLUSION

The prevalence rate of ST in our study was 0.74% and ST were more common among Class III malocclusions.

摘要

目的

调查伊朗正畸人群中超生牙（ST）的流行率、特征（错颌畸形、位置、类型）和性别分布。

材料和方法

使用 X 光片（根尖片、全景片）和 1751 名患者的模型（870 名女孩，881 名男孩；年龄 9-27 岁）进行回顾性研究。采用 Pearson 卡方检验，按性别和错颌畸形类型分层，比较 ST 分布的差异。

结果

在 13 名患者（6 名男性，7 名女性）中发现了 14 颗 ST，患病率为 0.74%。III 类错颌畸形（5.2%）中 ST 的患病率较高，而 II 类错颌畸形（0.1%）中 ST 少见。上颌（78.5%）比下颌（21.5%）更常见 ST。最常见的 ST 类型是锥形（43%）。我们没有观察到任何迟发性近中磨牙或远中磨牙 ST。