A Cone-Beam Computed Tomographic Study on Mandibular First Molars in a Chinese Subpopulation

• DOI: 10.1371/journal.pone.0134919
• Publication Date: 2015-08-04T18:12:37Z
• Authors: Xin Zhang; Shijiang Xiong; Yue Ma; Ting Han; Xinyu Chen; Fang Wan; Yating Lu; Songhe Yan; Yan Wang
• Keywords: Mandible (arthropod mouthpart)

The purpose of this study was to conduct a cone-beam computed tomographic (CBCT) investigation on the root and canal configuration mandibular first molars, especially morphology disto-lingual (DL) root, in Chinese subpopulation. A total 910 CBCT images molars were collected from 455 patients who underwent examinations as preoperative assessment for implants or orthodontic treatment. following information analyzed evaluated: tooth position, gender, number per tooth, type mesial root(s) distal root(s), angle DL curvature, distance between two orifices teeth with disto-buccal orifice–disto-lingual orifice–mesio-lingual orifice (DB-DL-ML). Most (64.9%, n = 591) had roots three canals, most canals (87.7%, 798) VI. prevalence 22.1% (n 201). right side higher than left (p<0.05). Additionally, curvature greater bucco-lingual (BL) orientation (30.10°±14.02°) mesio-distal (MD) (14.03°± 8.56°) Overall there high curved different degrees. This provided detailed about