Faculté de Chirurgie Dentaire, Université Paul Sabatier, Centre Hospitalier Universitaire, Toulouse, France; Laboratory Centre for Anthropology and Genomics of Toulouse, Université Paul Sabatier, Toulouse, France.
Faculté de Chirurgie Dentaire, Université Paul Sabatier, Centre Hospitalier Universitaire, Toulouse, France; Laboratory Centre for Anthropology and Genomics of Toulouse, Université Paul Sabatier, Toulouse, France.
Arch Oral Biol. 2022 Aug;140:105452. doi: 10.1016/j.archoralbio.2022.105452. Epub 2022 May 13.
This work describes and compares the root and root canal morphology of a medieval population dating from the 8th to 10th century from the southwest of France, and a current French population.
The root morphology of 579 teeth from 70 medieval individuals was analyzed using cone beam computed tomography, and compared with 690 teeth from a current French population of 329 individuals. The Vertucci classification was used to describe the root canal configuration.
In the medieval population, the maxillary first premolar usually had one root. In contrast, in the current population this tooth predominantly had two roots, and the three-root form had appeared. Mandibular canine with two roots was observed in 5.7% of cases, and in the current population this form was found in 1.6% but the difference was not significative. The greatest variability between the two populations in terms of root canal configuration was in one-rooted maxillary first and second premolars, the mandibular canines, and the distal roots of the mandibular first molars. Differences in root numbers and canal configurations of the maxillary molars investigated among the two populations were not significant.
This study indicated that the upper first premolar of the current population tended to have more than one root, while this tooth type of the medieval group mostly appeared with only one. For the root canal configuration, studies in the upper premolars, lower canines and first molars of the current population apparently revealed a significant simplification compared with the ancient group.
本研究描述并比较了来自法国西南部 8 至 10 世纪的中世纪人群和当前法国人群的牙根和根管形态。
使用锥形束计算机断层扫描分析了 70 名中世纪个体的 579 颗牙齿的牙根形态，并与 329 名当前法国人群的 690 颗牙齿进行了比较。采用 Vertucci 分类法描述根管形态。
在中世纪人群中，上颌第一前磨牙通常有一个牙根。相比之下，当前人群中这种牙齿主要有两个牙根，且已出现三个牙根的形态。下颌尖牙有两个牙根的占 5.7%，而当前人群中这种形式仅占 1.6%，但差异无统计学意义。两个人群之间在根管形态上差异最大的是单根上颌第一和第二前磨牙、下颌尖牙以及下颌第一磨牙的远中根。两个人群中上颌磨牙的牙根数量和根管形态存在差异，但无统计学意义。
本研究表明，当前人群的上颌第一前磨牙倾向于具有多于一个的牙根，而中世纪组的这种牙齿类型通常只有一个牙根。对于根管形态，当前人群的上颌前磨牙、下颌尖牙和第一磨牙的研究明显显示出与古代组相比明显简化。
