School of Dentistry, China Medical University, Taichung, 404, Taiwan.
Department of Dentistry, China Medical University Hospital, Taichung, 404, Taiwan.
Head Face Med. 2024 May 17;20(1):33. doi: 10.1186/s13005-024-00434-0.
Dental cone beam computed tomography (CBCT) is commonly used to evaluate cancellous bone density before dental implant surgery. However, to our knowledge, no measurement approach has been standardized yet. This study aimed to evaluate the relationship between three different regions of interest (ROI) methods on cancellous bone density at the dental implant site using dental CBCT images.
Patients' dental CBCT images (n = 300) obtained before dental implant surgery were processed using Mimics (Materialise, Leuven, Belgium). At the potential implant sites, the rectangle, cylinder, and surrounding cylinder ROI methods were used to measure bone density. Repeated measures one-way analysis of variance was performed to compare the three ROI methods in terms of measurement results. Pearson correlation analysis was performed to identify the likely pair-wise correlations between the three ROI methods.
The density value obtained using the surrounding cylinder approach (grayscale value [GV],523.56 ± 228.03) was significantly higher than the values obtained using the rectangle (GV, 497.04 ± 236.69) and cylinder (GV,493 ± 231.19) ROI methods in terms of results. Furthermore, significant correlations were noted between the ROI methods (r > 0.965; p < 0.001).
The density measured using the surrounding cylinder method was the highest. The choice of method may not influence the trends of measurement results.
This study was approved by the Institutional Review Board of China Medical University Hospital, No. CMUH111-REC3-205. Informed consent was waived by the Institutional Review Board of China Medical University Hospital, CMUH111-REC3-205, owing to the retrospective nature of the study.
牙科锥形束计算机断层扫描（CBCT）常用于评估牙种植术前松质骨密度。然而，据我们所知，尚未标准化任何测量方法。本研究旨在使用牙科 CBCT 图像评估三种不同感兴趣区域（ROI）方法在牙种植部位松质骨密度的关系。
使用 Mimics（比利时列日的 Materialise）对术前牙 CBCT 图像（n=300）进行处理。在潜在种植部位，使用矩形、圆柱和周围圆柱 ROI 方法测量骨密度。采用重复测量单因素方差分析比较三种 ROI 方法的测量结果。采用 Pearson 相关分析确定三种 ROI 方法之间可能的两两相关性。
周围圆柱方法（灰度值[GV]，523.56±228.03）获得的密度值显著高于矩形（GV，497.04±236.69）和圆柱（GV，493±231.19）ROI 方法。此外，ROI 方法之间存在显著相关性（r>0.965；p<0.001）。
周围圆柱方法测量的密度最高。方法的选择可能不会影响测量结果的趋势。
本研究得到中国医科大学附属医院机构审查委员会批准，编号为 CMUH111-REC3-205。由于研究的回顾性性质，中国医科大学附属医院机构审查委员会豁免了知情同意，编号为 CMUH111-REC3-205。
