Kang S-H, Lee J-W, Lim S-H, Kim Y-H, Kim M-K
Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea; Department of Oral and Maxillofacial Surgery, College of Dentistry, Yonsei University, Seoul, Republic of Korea.
Department of Oral and Maxillofacial Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Republic of Korea.
Int J Oral Maxillofac Surg. 2014 Oct;43(10):1293-301. doi: 10.1016/j.ijom.2014.06.009. Epub 2014 Jul 9.
The goal of the present study was to compare the accuracy of dental image replacement on a cone beam computed tomography (CBCT) image using digital image data from three-dimensional (3D) optical scanning of a dental cast, occlusal bite, and bite tray impression. A Bracket Typodont dental model was used. CBCT of the dental model was performed and the data were converted to stereolithography (STL) format. Three experimental materials, a dental cast, occlusal bite, and bite tray impression, were optically scanned in 3D. STL files converted from the CBCT of the Typodont model and the 3D optical-scanned STL files of the study materials were image-registered. The error range of each methodology was measured and compared with a 3D optical scan of the Typodont. For the three materials, the smallest error observed was 0.099±0.114mm (mean error±standard deviation) for registering the 3D optical scan image of the dental cast onto the CBCT dental image. Although producing a dental cast can be laborious, the study results indicate that it is the preferred method. In addition, an occlusal bite is recommended when bite impression materials are used.
本研究的目的是使用来自牙模、咬合咬痕和咬合托盘印模的三维（3D）光学扫描的数字图像数据，比较锥形束计算机断层扫描（CBCT）图像上牙齿图像替换的准确性。使用了一种Bracket Typodont牙科模型。对牙科模型进行CBCT扫描，并将数据转换为立体光刻（STL）格式。对三种实验材料，即牙模、咬合咬痕和咬合托盘印模进行了3D光学扫描。将Typodont模型的CBCT转换而来的STL文件与研究材料的3D光学扫描STL文件进行图像配准。测量每种方法的误差范围，并与Typodont的3D光学扫描结果进行比较。对于这三种材料，将牙模的3D光学扫描图像配准到CBCT牙齿图像上时观察到的最小误差为0.099±0.114mm（平均误差±标准差）。尽管制作牙模可能很费力，但研究结果表明这是首选方法。此外，当使用咬合印模材料时，建议采用咬合咬痕。
