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Journals / Anatolian Current Medical Journal / 2026 / Volume: 8 Issue: 2

Effect of post-processing alcohol washing time on the hardness and flexural strength of 3D-printed permanent dental resins

Büşra Tosun(BOLU ABANT IZZET BAYSAL UNIVERSITY, FACULTY OF DENTISTRY)0000-0003-3145-4454
Zeynep Şen Yılmaz(Kartal Oral and Dental Health Center)0000-0001-5478-7708
Nur Uysal(BOLU ABANT IZZET BAYSAL UNIVERSITY, FACULTY OF DENTISTRY)0009-0006-5426-4935
Pages
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Publication Date
2026-03-10
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

These results emphasize the necessity of optimizing post-processing protocols to ensure the long-term mechanical performance and clinical durability of 3D-printed permanent restorations.

📌 3 Key Takeaways

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Objective & Hypothesis:Aims: This study aimed to evaluate the influence of different alcohol washing durations on the hardness and flexural strength of a 3D-printed permanent dental resin, considering their critical role in clinical longevity.
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Key Findings & Data:Methods: Fifty bar-shaped specimens (25×2×2 mm) were fabricated using VarseoSmile TriniQ (BEGO, Bremen, Germany) permanent dental resin.
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Conclusion & Impact:These results emphasize the necessity of optimizing post-processing protocols to ensure the long-term mechanical performance and clinical durability of 3D-printed permanent restorations.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:3D printing · dental resin · alcohol washing time

Abstract

Aims: This study aimed to evaluate the influence of different alcohol washing durations on the hardness and flexural strength of a 3D-printed permanent dental resin, considering their critical role in clinical longevity. Methods: Fifty bar-shaped specimens (25×2×2 mm) were fabricated using VarseoSmile TriniQ (BEGO, Bremen, Germany) permanent dental resin. The specimens were divided into five groups (n=10) according to alcohol washing times: 3, 5, 10, 15, and 20 minutes. Following washing in 99.5% ethanol, all specimens underwent standardized light postcuring. Hardness was measured using a Shimadzu microhardness tester, and flexural strength was assessed using an Instron universal testing machine through a three-point bending test. Data were analyzed using one-way ANOVA, with the significance level set at p<0.05. Results: Alcohol washing time had a statistically significant effect on both hardness and flexural strength (p<0.001). Specimens washed for 3 minutes (21.64±3.69) and 5 minutes (18.27±2.51) exhibited significantly higher hardness values compared to those washed for 10, 15, and 20 minutes. Flexural strength showed a similar trend, with the highest strength recorded in the 3-minute group (23.19±1.02) and a progressive decrease observed with longer washing times, reaching the lowest values in the 20-minute group (17.71±1.16). Conclusion: Prolonged alcohol washing times negatively affected the mechanical properties of the 3D printed permanent dental resin. Shorter washing durations (3-5 minutes) better preserved surface hardness and flexural strength, indicating that excessive alcohol exposure may compromise material integrity. These results emphasize the necessity of optimizing post-processing protocols to ensure the long-term mechanical performance and clinical durability of 3D-printed permanent restorations.

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Cite This Article

Tosun, B., Yılmaz, Z. Ş., Uysal, N. (2026). Effect of post-processing alcohol washing time on the hardness and flexural strength of 3D-printed permanent dental resins. Anatolian Current Medical Journal, Volume: 8 Issue: 2. https://doi.org/10.38053/acmj.1869798

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