锥形束CT横断面图像上下颌管可视性的比较评估：一项回顾性研究。
Comparative evaluation of mandibular canal visibility on cross-sectional cone-beam CT images: a retrospective study.
作者信息
Miles Mahogany S, Parks Edwin T, Eckert George J, Blanchard Steven B
机构信息
1 Department of Periodontics and Allied Dental Programs, Indiana University School of Dentistry, Indianapolis, IN, USA.
2 Department of Oral Maxillofacial Radiology, Medicine and Pathology, Indiana University School of Dentistry, Indianapolis, IN, USA.
出版信息
Dentomaxillofac Radiol. 2016;45(2):20150296. doi: 10.1259/dmfr.20150296. Epub 2015 Nov 6.
OBJECTIVES
The purpose of this study was to determine the visibility of the mandibular canal (MC) in CBCT images and if the visibility of the MC is affected by gender, location and/or age.
METHODS
CBCT images were evaluated for the visibility of the MC by a board-certified oral and maxillofacial radiologist, a board-certified periodontist and a periodontics resident. Representative slices were examined for the first premolar (PM(1)), second premolar (PM(2)), first molar (M(1)) and second molar (M(2)) sites by all examiners. The visibility of the MC was registered as either present or absent.
RESULTS
360 total CBCT cross-sectional images were examined, with the MC identified in 204 sites (56%). Age had a significant effect on MC visibility, but it differed by location: for PM(1), age 47-56 had lower visibility than age 65+ (p = 0.0377). Gender also had a significant effect on canal visibility, where females had lower visibility than males overall (p = 0.0178) and had the most pronounced difference for PM(1) (p = 0.0054). Location had a significant effect on visibility, but it differed by age and by gender: for age 65+, M(2) had lower visibility than PM(1) (p = 0.0411) and PM(2) (p = 0.0180), while for females, PM(1) had lower visibility than M(1) (p = 0.0123) and M(2) (p = 0.0419).
CONCLUSIONS
The MC was visualized only in just over half of the CBCT images. Age, gender and location had significant effects on the visibility.
目的
本研究旨在确定锥形束计算机断层扫描（CBCT）图像中下颌管（MC）的可视性，以及MC的可视性是否受性别、位置和/或年龄的影响。
方法
由一位获得口腔颌面放射学委员会认证的放射科医生、一位获得牙周病学委员会认证的牙周病医生和一名牙周病住院医生对CBCT图像进行下颌管可视性评估。所有检查人员均对第一前磨牙（PM(1)）、第二前磨牙（PM(2)）、第一磨牙（M(1)）和第二磨牙（M(2)）部位的代表性切片进行检查。下颌管的可视性记录为存在或不存在。
结果
共检查了360张CBCT横断面图像，其中204个部位（56%）识别出了下颌管。年龄对下颌管可视性有显著影响，但因位置而异：对于PM(1)，47 - 56岁年龄段的可视性低于65岁及以上年龄段（p = 0.0377）。性别对根管可视性也有显著影响，总体而言女性的可视性低于男性（p = 0.0178），且在PM(1)部位差异最为明显（p = 0.0054）。位置对可视性有显著影响，但因年龄和性别而异：对于65岁及以上人群，M(2)的可视性低于PM(1)（p = 0.0411）和PM(2)（p = 0.0180），而对于女性，PM(1)的可视性低于M(1)（p = 0.0123）和M(2)（p = 0.0419）。
结论
仅略多于一半的CBCT图像中能看到下颌管。年龄、性别和位置对可视性有显著影响。
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