ArticleJournal of oral biology and craniofacial research
In-vitro evaluation of shear bond strength and bond-failure of isoamyl cyanoacrylate-resin adhesive ratios for bonding 3D-Printed denture bases and teeth.
Article in Journal of oral biology and craniofacial research. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Statement of problem: Shear bond strength between 3D-printed denture bases and teeth is inferior compared to conventional and milled dentures. Purpose: The success of 3D-printed complete dentures depends on reliable bonding between the denture base and teeth. This study evaluated shear bond strength and modes of bond failure of various isoamyl cyanoacrylate (ICA) and 3D printing resin formulations in different ratios. Materials and methods: Adhesive formulations of standardized ICA-to-resin ratios were prepared. Fifty samples were randomized into five groups: 0 % (control), 25 %, 50 %, 75 %, and 100 % ICA. Specimens were fabricated per ISO/TS 19736 standards using 3D-printed denture base and tooth resins. After bonding and polymerization, samples underwent shear bond strength testing. Failure modes were examined under stereomicroscope and classified as adhesive, cohesive, or mixed. Data were analyzed using one-way ANOVA with Tukey's post hoc test. Results: The 50 % ICA group showed the highest mean shear bond strength (3.738 ± 0.063 MPa), significantly greater than all others (P = 0.000). The control group exhibited the lowest strength (1.602 ± 0.140 MPa). Bond failure analysis showed predominantly adhesive failures in the control, whereas the 50 % ICA group had the greatest proportion of cohesive and mixed failures, indicating improved interfacial bonding and internal strength. Conclusions: A 50:50 ratio of isoamyl cyanoacrylate and light-cure 3D printing resin provides optimal bond strength and favorable failure patterns for bonding 3D-printed denture bases and teeth suggesting that a hybrid adhesive approach offers a promising solution to enhance the durability of 3D-printed dentures.
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