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. 2025 Feb 25;17(5):610.
doi: 10.3390/polym17050610.

A Novel 3D-Printing Model Resin with Low Volumetric Shrinkage and High Accuracy

Long Ling  1 , Theresa Lai  1 , Pei-Ting Chung  1 , Sara Sabet  1 , Victoria Tran  1 , Raj Malyala  1
Affiliations

A Novel 3D-Printing Model Resin with Low Volumetric Shrinkage and High Accuracy

Long Ling et al. Polymers (Basel). .

Abstract

This study aims to assess and compare the shrinkage, accuracy, and accuracy stability of a novel 3D-printing model resin and eight commercially available 3D-printing model resin materials. The experimental model resin was developed by our 3D-printing proprietary resin technology. Eight commercially available 3D-printing model resins were included for comparison. The AcuVol video imaging technique was used to test volumetric shrinkage. Full-arch tooth models were printed for each model resin via digital light processing (DLP) technology. The 3D average distance between the scanned model and the designed CAD digital file was applied to determine the dimensional accuracy of the 3D-printed full-arch tooth models. One-way ANOVA and Tukey's post hoc test (p < 0.05) were utilized to analyze the average values of volumetric shrinkage and 3D average distance (dimensional accuracy). The experimental model resin showed significantly lower volumetric shrinkage (7.28%) and significantly higher or higher accuracy and accuracy stability (11.66-13.77 µm from the initial day to four weeks) than the other commercially available model resins (7.66-11.2%, 14.03-41.14 µm from the initial day to four weeks). A strong correlation was observed between volumetric shrinkage and dimensional accuracy (Pearson correlation coefficient R = 0.7485). For clinically successful modelling applications in restorations, orthodontics, implants, and so on, the new 3D-printing model resin is a promising option.

Keywords: 3D printing; accuracy; additive manufacturing; digital light processing (DLP); model resin; shrinkage.

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Conflict of interest statement

Authors Long Ling, Theresa Lai, Pei-Ting Chung, Sara Sabet, Ngoc Tran and Raj Malyala are working at the company Glidewell Dental, Irvine, CA. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
Volumetric shrinkage of 3D-printing model resin materials (values with the same superscript are not significantly different (p > 0.05)).
Figure 2
Figure 2
Accuracy of 3D-printing model resin materials at five measurement times (the same letters with the same number in each row of above table are statistically equivalent between the tested groups, p > 0.05).
Figure 3
Figure 3
3D-printing average distances over time.
Figure 4
Figure 4
Representative images of 3D-printing average distances (D) of full-arch tooth models of resin materials at 0 day and 28 days.
Figure 4
Figure 4
Representative images of 3D-printing average distances (D) of full-arch tooth models of resin materials at 0 day and 28 days.
Figure 4
Figure 4
Representative images of 3D-printing average distances (D) of full-arch tooth models of resin materials at 0 day and 28 days.
Figure 5
Figure 5
Correlation of volumetric shrinkage and 3D-printing average distances.
See this image and copyright information in PMC

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