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Accuracy of integration of dental casts in three-dimensional models
H Terai1, M Shimahara, Y Sakinaka
1Department of Oral Surgery, Osaka Medical College, Japan.
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 degrees, and that determined by distance analysis was within 2 mm. However, errors over 4 degrees 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.
