Abd Fattah Syed Yusoff Alzawawi Syed, Hariri Firdaus, Nambiar Phrabhakaran, Abu Bakar Zulkiflee, Abdul Rahman Zainal Ariff
Department of Oral and Maxillofacial Clinical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.
Department of Otolaryngology and Head and Neck Surgery, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.
Curr Med Imaging Rev. 2019;15(7):645-653. doi: 10.2174/1573405614666181012144745.
To validate the accuracy of the mandibular canal region in 3D biomodel produced by using data obtained from Cone-Beam Computed Tomography (CBCT) of cadaveric mandibles.
Six hemi-mandible samples were scanned using the i-CAT CBCT system. The scanned data was transferred to the OsiriX software for measurement protocol and subsequently into Mimics software to fabricate customized cutting jigs and 3D biomodels based on rapid prototyping technology. The hemi-mandibles were segmented into 5 dentoalveolar blocks using the customized jigs. Digital calliper was used to measure six distances surrounding the mandibular canal on each section. The same distances were measured on the corresponding cross-sectional OsiriX images and the 3D biomodels of each dentoalveolar block.
Statistically no significant difference was found when measurements from OsiriX images and 3D biomodels were compared to the "gold standard" -direct digital calliper measurement of the cadaveric dentoalveolar blocks. Moreover, the mean value difference of the various measurements between the different study components was also minimal.
Various distances surrounding the mandibular canal from 3D biomodels produced from the CBCT scanned data was similar to that of direct digital calliper measurements of the cadaveric specimens.
验证使用尸体下颌骨的锥形束计算机断层扫描（CBCT）数据生成的三维生物模型中下颌管区域的准确性。
使用i-CAT CBCT系统对六个半下颌骨样本进行扫描。将扫描数据传输到OsiriX软件进行测量方案制定，随后导入Mimics软件，基于快速成型技术制作定制切割夹具和三维生物模型。使用定制夹具将半下颌骨分割成5个牙槽骨块。使用数字卡尺测量每个切片上下颌管周围的六个距离。在相应的OsiriX横截面图像和每个牙槽骨块的三维生物模型上测量相同的距离。
将OsiriX图像和三维生物模型的测量结果与尸体牙槽骨块的“金标准”——直接数字卡尺测量结果进行比较时，在统计学上未发现显著差异。此外，不同研究组件之间各种测量的平均值差异也很小。
CBCT扫描数据生成的三维生物模型上下颌管周围的各种距离与尸体标本的直接数字卡尺测量结果相似。
