Ceperuelo Dolors, Lozano Marina, Duran-Sindreu Fernando, Mercadé Montse
Department of Restorative Dentistry and Endodontics, Universitat Internacional de Catalunya, C/Josep Trueta s/n, 08195, Sant Cugat del Vallès, Barcelona, Spain.
Anat Rec (Hoboken). 2014 Dec;297(12):2342-8. doi: 10.1002/ar.22958. Epub 2014 Jun 18.
This study provides a morphological characterization of the inner anatomy of the root canals of permanent first and second molars in Chalcolithic and early Bronze Age human fossils using cone-beam computed tomography. The general evolutionary trend in present-day human dentition is related to morphological simplification. As little is known about when this trend appeared in Homo sapiens populations, the aim of this work is to test the presence of modern radicular morphology 4,400 years ago. Fifty-four permanent first and second maxillary and mandibular molars of 17 individuals were included in the study. All maxillary first and second molars showed three separate roots. Almost all the lower molars analyzed (100% of first molars and 75% of second molars) had two separate roots. More differences in the canal system configuration were documented in the maxillary mesiobuccal roots than in the palatal or distobuccal roots. The most variable tooth in root and canal configuration is the maxillary second molar. It should be pointed out that 12.5% of the teeth analyzed showed a C-shaped root configuration.
本研究使用锥形束计算机断层扫描技术，对铜石并用时代和青铜时代早期人类化石中恒第一和第二磨牙根管的内部解剖结构进行了形态学表征。现代人类牙列的一般进化趋势与形态简化有关。由于对这一趋势在智人群体中何时出现知之甚少，本研究的目的是检验4400年前现代牙根形态的存在情况。该研究纳入了17名个体的54颗恒上颌和下颌第一及第二磨牙。所有上颌第一和第二磨牙均显示有三个独立的牙根。几乎所有分析的下颌磨牙（第一磨牙的100%和第二磨牙的75%）都有两个独立的牙根。与腭根或远颊根相比，上颌近中颊根的根管系统形态差异更多。牙根和根管形态变化最大的牙齿是上颌第二磨牙。应该指出的是，12.5%的分析牙齿显示出C形牙根形态。
