Clinical article
Accuracy of integration of dental casts in three-dimensional models

https://doi.org/10.1016/S0278-2391(99)90425-1Get rights and content

Abstract

Purpose: This study investigated errors occurring in three-dimensional (3D) models when plaster dental casts are integrated into them.

Materials and Methods: Three-dimensional milling models of three patients with a jaw deformity were fabricated using the Endoplan system (SPARC International Inc, Santa Clara, CA). After this, plaster dental casts were integrated into the 3D models using a face-bow transfer system. Two cephalograms were then compared, one obtained from the patient and the other obtained from the 3D model painted with contrast medium.

Results: In two cases, the reproducibility of the dental position as determined by angle analysis was within 2 °, and that determined by distance analysis was within 2 mm. However, errors over 4 ° and 4.2 mm, respectively, were observed in one case.

Conclusion: It is clinically important to confirm the accuracy of the 3D model by cephalometric analysis, and it may be necessary to reposition the dental model based on the results.

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Received from the Osaka Medical College, Osaka, Japan.

Assistant Professor, Department of Oral Surgery.

Professor, Department of Oral Surgery.

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Professor, Department of Plastic and Reconstructive Surgery.

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