Kumar A Anand, Phillip Abraham, Kumar Sathesh, Rawat Anuradha, Priya Sakthi, Kumaran V
Department of Orthodontics, JKK Nattraja Dental College, Komarapalayam, Namakkal, Tamil Nadu, India.
J Pharm Bioallied Sci. 2015 Aug;7(Suppl 2):S465-9. doi: 10.4103/0975-7406.163506.
Digital three-dimensional models are widely used for orthodontic diagnosis. The purpose of this study was to appraise the accuracy of digital models obtained from computer-aided design/computer-aided manufacturing (CAD/CAM) and cone-beam computed tomography (CBCT) for tooth-width measurements and the Bolton analysis.
Digital models (CAD/CAM, CBCT) and plaster model were made for each of 50 subjects. Tooth-width measurements on the digital models (CAD/CAM, CBCT) were compared with those on the corresponding plaster models. The anterior and overall Bolton ratios were calculated for each participant and for each method. The paired t-test was applied to determine the validity.
Tooth-width measurements, anterior, and overall Bolton ratio of digital models of CAD/CAM and CBCT did not differ significantly from those on the plaster models.
Hence, both CBCT and CAD/CAM are trustable and promising technique that can replace plaster models due to its overwhelming advantages.
数字三维模型广泛应用于正畸诊断。本研究的目的是评估通过计算机辅助设计/计算机辅助制造（CAD/CAM）和锥形束计算机断层扫描（CBCT）获得的数字模型在牙齿宽度测量和Bolton分析方面的准确性。
为50名受试者制作了数字模型（CAD/CAM、CBCT）和石膏模型。将数字模型（CAD/CAM、CBCT）上的牙齿宽度测量结果与相应石膏模型上的测量结果进行比较。计算了每位参与者每种方法的前牙Bolton比率和总体Bolton比率。采用配对t检验来确定有效性。
CAD/CAM和CBCT数字模型的牙齿宽度测量、前牙Bolton比率和总体Bolton比率与石膏模型相比无显著差异。
因此，CBCT和CAD/CAM都是可靠且有前景的技术，因其具有压倒性优势，可以取代石膏模型。
