Aslan Belma Işik, Akarslan Zühre Zafersoy
Gazi University, Faculty of Dentistry, Department of Orthodontics, Ankara, Turkey.
Coll Antropol. 2013 Mar;37(1):115-20.
The aim of this study was to establish teeth number anomalies in relation to gender, tooth type, location, distribution pattern and the association between frequently missing teeth among a group of dental patients in Turkey. A total of 378 non-syndromic patients (240 females and 138 males) with an age range of 7-45 (x +/- SD = 22.07 +/- 3.6) having evidence of absent or excess teeth were evaluated in the study. Pearson Chi-square, Fisher's exact, McNemar and Kappa coefficients were used for statistical analysis. 237 patients had a total of 546 congenitally missing teeth and 141 had 185 excess teeth. Congenitally missing teeth were more commonly seen rather than the presence of supernumerary teeth. Difference was determined in the frequent locations of congenital missing and supernumerary teeth. The most frequent missing tooth type was found to be the mandibular second premolar (26.6%), while the majority of supernumerary teeth were located in the anterior region of the maxillary arch (37.9%). Both teeth number anomalies were more commonly seen among females. In hypodontia cases the occurrence of symmetrical agenesis of laterals and second premolars in maxilla; centrals and second premolars in mandible was notable. Agenesis of mandibular centrals was found to be associated with maxillary lateral agenesis in males. Also higher prevalence of molar teeth agenesis was determined in the occurrence of at least 4 teeth agenesis. These findings will serve as information about the contemporary demographic pattern of teeth number anomalies among non-syndromic Turkish dental patients and can provide evidence that agenesis of some teeth symmetrically or together are the products of the same genetic mechanisms.
本研究的目的是确定土耳其一组牙科患者牙齿数目异常与性别、牙齿类型、位置、分布模式以及常见缺失牙之间的关联。本研究共评估了378例非综合征患者（240例女性和138例男性），年龄范围为7至45岁（x +/- SD = 22.07 +/- 3.6），这些患者有牙齿缺失或多余的证据。采用Pearson卡方检验、Fisher精确检验、McNemar检验和Kappa系数进行统计分析。237例患者共有546颗先天性缺失牙，141例患者有185颗多生牙。先天性缺失牙比多生牙更常见。先天性缺失牙和多生牙的常见位置存在差异。最常缺失的牙齿类型是下颌第二前磨牙（26.6%），而大多数多生牙位于上颌弓前部（37.9%）。两种牙齿数目异常在女性中更为常见。在少牙症病例中，上颌侧切牙和第二前磨牙；下颌中切牙和第二前磨牙的对称性牙胚缺失情况值得注意。发现男性下颌中切牙缺失与上颌侧切牙缺失有关。在至少4颗牙齿缺失的情况下，磨牙缺失的患病率也较高。这些发现将作为非综合征土耳其牙科患者牙齿数目异常当代人口统计学模式的信息，并可提供证据表明某些牙齿的对称性或共同缺失是相同遗传机制的产物。
