[锥形束计算机断层扫描评估下颌磨牙根分叉病变的准确性分析]

[Accuracy analysis of cone beam computed tomography in assessing furcation involvements of mandibular molars].

作者信息

Qiao J, Duan J Y, Sun C Z, Liu D G

机构信息

First Clinical Division, Peking University School and Hospital of Stomatology, Beijing 100034, China.

Department of Oral Radiology, Peking University School and Hospital of Stomatology, Beijing 100034, China.

出版信息

Beijing Da Xue Xue Bao Yi Xue Ban. 2014 Dec 18;46(6):975-9.

PMID:25512295

Abstract

OBJECTIVE

To evaluate the accuracy of cone beam computed tomography (CBCT) in assessing furcation involvements of mandibular molars.

METHODS

In the study, 38 furcation involvements of 22 mandibular molars which would accept furcation surgery were included. Pre-surgical examination, CBCT and periapical radiograph were performed. Then, intra-surgical furcation assessments were compared with those data.

RESULTS

Intra-surgical findings confirmed 86.8% of the CBCT data, with a weighed kappa of 0.976. Of the four parameters tested of detailed root anatomy and furcation morphology, the vertical bone loss, the mesial-distal bone loss and the length of the root trunk revealed by CBCT were consistent with their respective intra-surgical values (P>0.05): about vertical bone loss, CBCT was (4.03±2.27) mm, but in surgery was (4.32±2.31) mm; about mesial-distal bone loss, CBCT was (2.05±0.89) mm, but in surgery was (2.07±0.97) mm; about length of the root trunk, CBCT was (2.35±0.88) mm, but in surgery was (2.24± 0.75) mm. The horizontal bone loss revealed by CBCT [(3.40±1.27) mm] was significantly smaller than that by surgery [(3.72±1.19) mm]. However, the mean difference was only 0.32 mm. Periapical radiograph could only obtain vertical bone loss [(2.17±1.32) mm] and mesial-distal bone loss [(1.46± 0.88) mm], which was significantly different from that obtained in surgery.

CONCLUSION

CBCT proved high accuracy in assessing the furcation involvement of mandibular molars.

摘要

目的

评估锥形束计算机断层扫描（CBCT）在下颌磨牙根分叉病变评估中的准确性。

方法

本研究纳入了22颗拟接受根分叉手术的下颌磨牙的38处根分叉病变。进行了术前检查、CBCT和根尖片检查。然后，将术中根分叉评估结果与这些数据进行比较。

结果

术中发现证实了86.8%的CBCT数据，加权kappa值为0.976。在测试的详细牙根解剖结构和根分叉形态的四个参数中，CBCT显示的垂直骨吸收、近远中骨吸收和根干长度与其各自的术中值一致（P>0.05）：关于垂直骨吸收，CBCT为（4.03±2.27）mm，而术中为（4.32±2.31）mm；关于近远中骨吸收，CBCT为（2.05±0.89）mm，而术中为（2.07±0.97）mm；关于根干长度，CBCT为（2.35±0.88）mm，而术中为（2.24±0.75）mm。CBCT显示的水平骨吸收[（3.40±1.27）mm]明显小于手术中的水平骨吸收[（3.72±1.19）mm]。然而，平均差异仅为0.32mm。根尖片仅能获得垂直骨吸收[（2.17±1.32）mm]和近远中骨吸收[（1.46±0.88）mm]，这与手术中获得的结果有显著差异。