Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases, Department of Preventive Dentistry, College of Stomatology, Xi'an Jiaotong University, XiWu Road 98, Xi'an, 710004 Shaanxi Province, China.
State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Operative Dentistry and Endodontics, School of Stomatology, Air Force Medical University, West Changle Road 145, Xi'an 710032, China.
Biomed Res Int. 2021 Jan 8;2021:8862956. doi: 10.1155/2021/8862956. eCollection 2021.
This study is aimed at investigating the root and root canal morphology by cone beam computed tomography (CBCT) and palatal furcation groove of the buccal root by microcomputed tomography (micro-CT) of maxillary first premolars in a Chinese subpopulation.
This study assessed CBCT images of 440 patients aged 14-80 years. Based on Vertucci's classification, the number of roots and the canal configuration were determined. Forty-eight maxillary first premolars with furcation grooves were analyzed by micro-CT in patients aged 18-25 years.
Based on the CBCT assay, 70.22% and 29.32% of maxillary first premolars were 1 root and 2 roots, respectively. The configuration indicated statistical difference ( < 0.05) between male and female patients. The most common canal type was type IV and was found in 44.32% of cases, followed by type I in 27.84%, and then type II in 20.57%. Root bifurcations had 40.13% prevalence which was distributed more in the middle third than in the cervical and the apical third. For the micro-CT study, 95.83% of the furcation groove configuration was found in the bifurcated maxillary first premolars. The length varied from 1.02 to 7.63 mm. The mean depth of this groove was 0.57 mm in the root coronal, 0.47 mm in the root middle, and 0.22 mm in the root apical level. Palatal dentin width was smaller than 1 mm.
The anatomy of the root and root canal system and the irregular wall width of maxillary first premolars with furcation grooves may help dentists to understand the anatomical morphology and improve the outcomes of endodontic treatment.
本研究旨在通过锥形束 CT（CBCT）研究中国人群上颌第一前磨牙的根管形态和颊根腭侧分叉沟，通过微计算机断层扫描（micro-CT）研究上颌第一前磨牙的颊根腭侧分叉沟。
本研究评估了 440 名 14-80 岁患者的 CBCT 图像。根据 Vertucci 分类法，确定了根的数量和根管形态。对 18-25 岁患者的 48 颗具有分叉沟的上颌第一前磨牙进行 micro-CT 分析。
根据 CBCT 检测，70.22%和 29.32%的上颌第一前磨牙为 1 根和 2 根，性别之间的根管形态存在统计学差异（<0.05）。最常见的根管类型是 IV 型，占 44.32%，其次是 I 型，占 27.84%，其次是 II 型，占 20.57%。根分叉的发生率为 40.13%，主要分布在中 1/3，而不是近中 1/3和根尖 1/3。对于 micro-CT 研究，分叉上颌第一前磨牙的分叉沟形态有 95.83%被发现。沟的长度从 1.02 到 7.63mm 不等。该沟在根冠的平均深度为 0.57mm，在根中部为 0.47mm，在根尖部为 0.22mm。腭侧牙本质宽度小于 1mm。
上颌第一前磨牙的根管形态和根管系统解剖结构以及不规则的颊根分叉沟壁宽度，有助于牙医了解解剖形态，提高根管治疗的效果。
