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<p>This study evaluated the shear bond strength (SBS) of two dual-cure resin cements to a stereolithography-fabricated 3D-printed permanent crown material after various surface pretreatment protocols. Disc-shaped specimens were fabricated from a permanent crown resin (Permanent Crown, Formlabs) and post-processed according to the manufacturer’s instructions. After standardized surface preparation, specimens (<i>n</i> = 48) were randomly assigned to six experimental groups (<i>n</i> = 8), based on surface treatment (sandblasting, silane application, or 9% hydrofluoric acid etching) and resin cement type (Panavia V5 or Variolink DC). Resin cements were polymerized according to the manufacturers’ recommendations, and specimens underwent thermocycling (5000 cycles, 5–55&#xa0;°C, 30&#xa0;s dwell time). Shear bond strength was measured using a universal testing machine, and failure modes were analyzed under optical microscopy. Statistical analysis was performed using two-way ANOVA and Fisher’s exact test with Monte Carlo estimation (α = 0.05). Surface pretreatment protocol and resin cement type significantly influenced SBS values, with two-way ANOVA revealing significant main effects for surface pretreatment protocol (F = 14.376, <i>p</i> &lt; 0.001) and resin cement type (F = 5.429, <i>p</i> = 0.025), whereas their interaction was not statistically significant (F = 1.744, <i>p</i> = 0.187). Sandblasting yielded the highest SBS values, followed by hydrofluoric acid etching and silane application. Pairwise comparisons showed significant differences among the surface pretreatment protocols. Variolink DC demonstrated significantly higher SBS values than Panavia V5. No significant differences were observed in failure mode distribution among the groups according to Fisher’s exact test with Monte Carlo estimation (Monte Carlo <i>p</i> = 0.369). Within the limitations of this in vitro study, both surface treatment strategy and resin cement selection significantly affected the bonding performance of the tested 3D-printed permanent resin material, with sandblasting and Variolink DC showing superior results.</p>

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Influence of surface treatment and cement type on the bond strength of additively manufactured permanent resin materials

  • 期刊论文

  • 发表日期：

    2026年6月15日

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  • Almira Ada Diken Türksayar,
  • Nursena Öztemel,
  • İrem Beril Yeşil Kurt,
  • Ali Can Bulut

摘要

This study evaluated the shear bond strength (SBS) of two dual-cure resin cements to a stereolithography-fabricated 3D-printed permanent crown material after various surface pretreatment protocols. Disc-shaped specimens were fabricated from a permanent crown resin (Permanent Crown, Formlabs) and post-processed according to the manufacturer’s instructions. After standardized surface preparation, specimens (n = 48) were randomly assigned to six experimental groups (n = 8), based on surface treatment (sandblasting, silane application, or 9% hydrofluoric acid etching) and resin cement type (Panavia V5 or Variolink DC). Resin cements were polymerized according to the manufacturers’ recommendations, and specimens underwent thermocycling (5000 cycles, 5–55 °C, 30 s dwell time). Shear bond strength was measured using a universal testing machine, and failure modes were analyzed under optical microscopy. Statistical analysis was performed using two-way ANOVA and Fisher’s exact test with Monte Carlo estimation (α = 0.05). Surface pretreatment protocol and resin cement type significantly influenced SBS values, with two-way ANOVA revealing significant main effects for surface pretreatment protocol (F = 14.376, p < 0.001) and resin cement type (F = 5.429, p = 0.025), whereas their interaction was not statistically significant (F = 1.744, p = 0.187). Sandblasting yielded the highest SBS values, followed by hydrofluoric acid etching and silane application. Pairwise comparisons showed significant differences among the surface pretreatment protocols. Variolink DC demonstrated significantly higher SBS values than Panavia V5. No significant differences were observed in failure mode distribution among the groups according to Fisher’s exact test with Monte Carlo estimation (Monte Carlo p = 0.369). Within the limitations of this in vitro study, both surface treatment strategy and resin cement selection significantly affected the bonding performance of the tested 3D-printed permanent resin material, with sandblasting and Variolink DC showing superior results.