Digital model as an alternative to plaster model in assessment of space analysis

A Anand Kumar, Abraham Phillip, Sathesh Kumar, Anuradha Rawat, Sakthi Priya, V Kumaran, A Anand Kumar, Abraham Phillip, Sathesh Kumar, Anuradha Rawat, Sakthi Priya, V Kumaran

Abstract

Introduction: 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.

Materials and methods: 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.

Results: 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.

Conclusion: Hence, both CBCT and CAD/CAM are trustable and promising technique that can replace plaster models due to its overwhelming advantages.

Keywords: Bolton's ratio; Computer-aided design/computer-aided manufacturing; cone-beam computed tomography; digital models.

Figures

Graph 1
Graph 1
The comparison of anterior Bolton's ratio calculated from computer-aided design/computer-aided manufacturing, cone-beam computed tomography, and plaster model measurements
Graph 2
Graph 2
The comparison of overall Bolton's ratio calculated from computer-aided design/computer-aided manufacturing, cone-beam computed tomography, and plaster model measurements

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