Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Necmettin Erbakan University, Ankara Street, 42050, Konya, Turkey.
Oral Radiol. 2019 May;35(2):177-183. doi: 10.1007/s11282-018-0336-x. Epub 2018 Jun 8.
The aim of the study was to compare intraoral radiographs and CBCT images for detection of horizontal periodontal bone loss, and to investigate the diagnostic effect of different voxel resolutions in CBCT imaging.
A total of 240 sites with horizontal bone loss were measured on the buccal, lingual, mesial, and distal surfaces of 60 posterior teeth in four maxillary and six mandibular bones obtained from cadavers (dry skulls). Direct measurements on the dry skulls were accepted as the gold standard values. Measurements on CBCT images at two different voxel resolutions (0.250 and 0.160 mm) and intraoral bitewing radiographs were compared with one another and with the gold standard values.
The measurements on the CBCT images at two voxel resolutions and bitewing radiographs did not differ significantly (p > 0.05) from the direct measurements on the dry skulls. No significant difference was found between the bitewing radiographs and CBCT images for measurements in the mesial and distal regions (p > 0.05). There was no significant difference between the measurements on the buccal and lingual surfaces at the two different voxel resolutions (p > 0.05).
CBCT scans are recommended for evaluation of buccal and lingual bone loss to avoid intraoral radiographs that exceed routine examination of interproximal alveolar bone loss. Furthermore, instead of basing the voxel size on the required CBCT scans, it is recommended to select the smallest possible field of view to reduce the dose of radiation.
本研究旨在比较口腔内放射线片和 CBCT 图像在检测水平牙周骨丧失方面的效果，并研究不同体素分辨率在 CBCT 成像中的诊断效果。
从 4 具上颌骨和 6 具下颌骨的 60 颗后牙颊侧、舌侧、近中侧和远中侧共 240 个有水平骨丧失的位点获取干颅骨标本。干颅骨上的直接测量被认为是金标准值。比较不同体素分辨率（0.250 和 0.160mm）的 CBCT 图像和口腔内咬翼片上的测量值与金标准值之间的差异。
两种体素分辨率的 CBCT 图像和咬翼片上的测量值与干颅骨上的直接测量值无显著差异（p＞0.05）。在近中和远中区域，咬翼片和 CBCT 图像的测量值之间无显著差异（p＞0.05）。两种不同体素分辨率时，颊侧和舌侧表面的测量值之间无显著差异（p＞0.05）。
建议使用 CBCT 扫描评估颊侧和舌侧骨丧失，以避免超出常规检查的口腔内放射线片对邻间牙槽骨丧失的检查。此外，建议根据所需的 CBCT 扫描选择尽可能小的视野，而不是基于体素大小，以减少辐射剂量。
