Evaluating the Three-Dimensional Printing Accuracy of Partial-Arch Models According to Outer Wall Thickness: An In Vitro Study

Abstract

The printing accuracy of three-dimensional (3D) dental models using photopolymer resin affects dental diagnostic procedures and prostheses. The accuracy of research into the outer wall thickness and printing direction data for partial-arch model printing has been insufficient. This study analyzed the effects of wall thickness and printing direction accuracy. Anterior and posterior partial-arch models were designed with different outer wall thicknesses. After 3D printing, a trueness analysis was performed. Those with full-arch models were the control group. The full-arch model had an error value of 73.60 ± 2.61 µm (mean ± standard deviation). The error values for the partial-arch models with 1-, 2-, and 3-mm thick outer walls were 54.80 ± 5.34, 47.58 ± 7.59, and 42.25 ± 9.19 μm, respectively, and that for the fully filled model was 38.20 ± 4.63 μm. The printing accuracies differed significantly between 0 degrees and 60 degrees, at 49.54 ± 8.16 and 40.66 ± 6.80 μm, respectively (F = 153.121, p < 0.001). In conclusion, the trueness of the partial-arch model was better than that of the full-arch model, and models with thick outer walls at 60 degrees were highly accurate.

The Influence of Dental Virtualization, Restoration Types, and Placement Angles on the Trueness and Contact Space in 3D-Printed Crowns: A Comprehensive Exploration

“…Placing it at a vertical 90-degree angle caused severe errors, making it unusable. These results align with the literature suggesting that bridges must be parallel to the printing plane to maintain proper contact and reduce errors [16].…”

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Tailoring of Silicone Urethane Methacrylate Resin for Vat Photopolymerization-Based 3D Printing of Shape Memory Polymers

“…In this study, the mSLA printing process involves a separation phase where the object being printed is detached from the bottom film of the resin vat. It is important to note that the tension created during this separation phase can have a significant impact on the overall lamination process for each layer, thus affecting the quality and accuracy of the printed object …”

“…It is important to note that the tension created during this separation phase can have a significant impact on the overall lamination process for each layer, thus affecting the quality and accuracy of the printed object. 44 3.3.2. Thermal Analysis.…”

3D Printing for Dental Applications

“…The 3D printing accuracy of partial-arch models according to outer wall thickness was evaluated in an in vitro study by Shin et al [5]. Anterior and posterior partial-arch models with different outer wall thicknesses were designed and printed by means of stereolithography (SLA), and a trueness analysis was performed to analyze the effect of wall thickness and printing direction accuracy.…”