However, the traditional plaster model produced after making intraoral impressions using alginate or silicone impression material can be damaged, either during the transportation or storage of the impression body, and the plaster model itself. In Group U, the error during the printing process was higher for the hollowed models.ĭental models have been produced to reproduce patient dental information outside the oral cavity for treatment processes such as consultation, diagnosis, and prosthesis fabrication. The results of this study suggest that a cross-arch plate is necessary for the accurate production of a model using 3D printing regardless of its internal structure. The precision was 70.3 ± 19.1 µm in Group U and 65.0 ± 8.8 µm in Group P. Regarding the internal structure, the accuracy was 143.1 ± 46.8 µm in the 1.5 mm-thick shell group, which improved to 111.1 ± 31.9 µm and 106.7 ± 26.3 µm in the roughly filled and fully filled models, respectively. Two-way ANOVA of the trueness revealed that the accuracy was 135.2 ± 26.3 µm (mean ± SD) in Group U and 85.6 ± 13.1 µm in Group P. The trueness and precision were analyzed for accuracy comparisons of the 3D printed models. The model was designed with a U-shaped arch and the palate removed (Group U) or a cross-arch plate attached to the palate area (Group P), and the internal structure was divided into five types. This study analyzed how the internal structure and the presence of a cross-arch plate influence the accuracy of a 3D printed dental model.

The amount of photopolymer material consumed during the three-dimensional (3D) printing of a dental model varies with the volume and internal structure of the modeling data.

3d stl models cross free