Effect of layer thickness on the flexural strength of digital light processing-printed provisional restorative resin

Q: What does this research mean for the field?

Digital light processing (DLP) 3D-printed provisional restorative resin exhibits higher flexural strength than conventional self-curing PMMA resin, and its flexural strength increases as the printing layer thickness decreases. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

Ji-Yeon Hong; Seon-Ki Lee

doi:10.14368/jdras.2026.42.3.222

August 31, 2026Journal of Dental Rehabilitation and Applied ScienceOpen Access

Effect of layer thickness on the flexural strength of digital light processing-printed provisional restorative resin

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Key Points

Investigate how varying layer thickness influences the flexural strength of provisional restoration resin printed using digital light processing (DLP) compared to conventional self-curing polymethyl methacrylate (PMMA) resin.
Fabricated 40 bar-shaped specimens (N = 10 per group) comprising three DLP 3D-printed resin groups at layer thicknesses of 50, 100, and 150 μm, alongside a self-curing PMMA control group.
Measured flexural strength using a standardized three-point bending test and analyzed group differences via one-way ANOVA followed by Tukey's post hoc test.
All DLP 3D-printed groups demonstrated significantly higher flexural strength than the self-curing PMMA control group (P < 0.001).
Flexural strength increased as layer thickness decreased across 3D-printed groups, with the 50 μm group exhibiting significantly greater flexural strength than the 150 μm group (P = 0.017).

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Implication

In vitro experimental study demonstrates increased flexural strength with thinner printing layers in DLP-fabricated provisional resin, indicating layer thickness optimizes dental restoration...

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Hong et al. (2026) studied this question.

synapsesocial.com/papers/6a9934b4636c6408cfa7c7c5 https://doi.org/10.14368/jdras.2026.42.3.222

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Effect of layer thickness on the flexural strength of digital light processing-printed provisional restorative resin

Key Points

No abstract yet

Implication

Discussion

Cite This Study

Effect of layer thickness on the flexural strength of digital light processing-printed provisional restorative resin

Key Points

No abstract yet

Implication

Discussion

Cite This Study

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