三根原发性下颌第一和第二磨牙的患病率:墨西哥人群的临床和放射学发现。

María A Moyaho-Bernal, Rosendo Carrasco-Gutiérrez, Rosario Jiménez-Flores, Gladis Juárez-Luna, Gerardo R López-Del Pino, Luz V Mendoza-García, Bernardo Teutle-Coyotecatl
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引用次数: 2

摘要

本研究的目的是确定墨西哥人群中下颌第一和第二磨牙三根的患病率,并描述其临床和影像学表现。行口内根尖周x线片、正位断层摄影或锥形束计算机断层摄影(CBCT)。共有2284名来自墨西哥普埃布拉州的儿童接受了检查,其中20人出现了牙冠形状的解剖变异。在冠改变的全部牙齿中,发现10颗第一磨牙和5颗第二磨牙有多生根。在一个病例中,可以获得微型ct图像。该研究记录了患病率、单侧或双侧发病率以及两性之间的比例。数据分析采用描述性统计。临床表现为下颌第一磨牙的解剖变异(右侧和/或左侧颈椎凸出)。第二磨牙牙冠形态正常。下颌三根第一磨牙和第二磨牙的患病率分别为0.44%和0.22%。下颌三根第一磨牙的男女比例为4:1,男性有遗传易感性;第二磨牙的男女比例为1.5:1,无性别易感性。儿童牙医在常规护理中应考虑到初生磨牙的临床和放射学解剖变异,因为它们可能导致修复困难。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Prevalence of three-rooted primary mandibular first and second molars: clinical and radiographic findings in a Mexican population.

Prevalence of three-rooted primary mandibular first and second molars: clinical and radiographic findings in a Mexican population.

Prevalence of three-rooted primary mandibular first and second molars: clinical and radiographic findings in a Mexican population.

Prevalence of three-rooted primary mandibular first and second molars: clinical and radiographic findings in a Mexican population.

The aim of this study was to determine prevalence and describe the clinical and radiographic findings of three-rooted primary mandibular first and second molars in a Mexican population. Intraoral periapical radiograph, orthopantomogram or cone beam computed tomography (CBCT) were obtained. A total 2284 children from the state of Puebla, Mexico were examined, of whom 20 presented an anatomic variant in tooth crown shape. Of the total teeth with crown alterations, 10 first and 5 second primary mandibular molars were found to have supernumerary roots. In one case, it was possible to obtain micro-CT images. The study recorded prevalence, unilateral or bilateral occurrence, and ratio between sexes. Data were analyzed using descriptive statistics. Clinical findings were presence of an anatomical variation (tuberculum paramolare / right and/or left cervical convexity) in primary mandibular first molars. Second molars presented conventional crown morphology. Prevalence of three-rooted primary mandibular first and second molars was 0.44% and 0.22%, respectively. Male: female ratio for presence of threerooted primary mandibular first molars was 4:1, showing genetic predisposition in males, and for second molars it was 1.5:1, with no predisposition according to sex. The clinical and radiographic anatomical variants in primary molars should be considered by pediatric dentists during routine care because they may cause difficulties in restorations.

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