Braun X, Ritter L, Jervøe-Storm P-M, Frentzen M
Department of Periodontology, Operative and Preventive Dentistry, School of Dentistry, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany.
Department of Craniomaxillofacial and Plastic Surgery and Interdisciplinary Outpatient Department of Oral Surgery and Implantology, University of Cologne, Kerpener Str. 62, Cologne, 50924, Germany.
Clin Oral Investig. 2014 May;18(4):1229-1236. doi: 10.1007/s00784-013-1106-0. Epub 2013 Sep 19.
The present study compares the diagnostic value of periodontal bone defect images using conventional two-dimensional single-tooth radiographs and three-dimensional cone beam computed tomography (CBCT) images.
Classified periodontal bone defects were prepared on pig mandibles and presented radiographically. Fifteen dentists were instructed to make a diagnosis based on these x-rays, regarding the type and the extent of the bone defects. Subsequently, the results were evaluated and compared to the morphology of the surgically prepared defects as the gold standard.
On average, the diagnosis of infrabony defects were 21 %, dehiscence 25 %, and fenestration 33 % more accurate using the three-dimensional projection than with the single-tooth radiograph. Furthermore, the CBCT allows grade II furcation to be captured more accurately.
The results of this study indicate that a considerably more precise analysis of periodontal defects is possible due to the third dimension. Particularly, in the oro-vestibular orientation, defects could be detected significantly more accurate.
CBCT images offer an advantageous alternative to the conventional single-tooth radiograph while taking the higher exposure of radiation into account.
本研究比较了使用传统二维单牙X线片和三维锥形束计算机断层扫描（CBCT）图像对牙周骨缺损图像的诊断价值。
在猪下颌骨上制备分类的牙周骨缺损并进行影像学呈现。指导15名牙医根据这些X线片对骨缺损的类型和范围进行诊断。随后，对结果进行评估并与手术制备的缺损形态作为金标准进行比较。
平均而言，使用三维投影诊断骨下袋缺损的准确率比单牙X线片高21%，裂隙高25%，开窗高33%。此外，CBCT能更准确地捕捉II度根分叉病变。
本研究结果表明，由于三维空间，对牙周缺损进行更精确的分析成为可能。特别是在口腔前庭方向，缺损的检测可以显著更准确。
考虑到更高的辐射暴露，CBCT图像为传统单牙X线片提供了一个有利的替代方案。
