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<p>This laboratory study evaluated the effect of surface pretreatments and erosion on the shear bond strength (SBS) of additive (3D-printed; Crowntec™) and subtractive (milled; Cerasmart™ 270) CAD/CAM resin-based materials bonded with a self-adhesive resin cement. Seventy-two specimens of each material were assigned to three surface pretreatment groups: control, grit-blasting, and grit-blasting + universal adhesive (UA). After treatment, self-adhesive resin cement (Panavia™ SA Cement Plus) was applied using a mold (2.38&#xa0;mm diameter, 3&#xa0;mm height). Specimens were then divided into control, gastric acid, and citric acid groups and subjected to 96&#xa0;h erosive aging (n = 8). SBS was tested with a universal testing machine, failure modes were examined under a stereomicroscope, and data analyzed using SPSS 21.0 (α = 0.05). Material type and erosion significantly affected SBS (p &lt; 0.001), whereas surface pretreatments did not (p = 0.698). Crowntec showed decreased SBS in the grit-blasting + UA group after gastric acid (p = 0.02), while Cerasmart had reduced SBS in all pretreated groups after both acids (p &lt; 0.05). Overall, Crowntec exhibited higher SBS with predominant cohesive failures, while Cerasmart showed mainly adhesive failures, except in the grit-blasting + UA group. The findings indicate that SBS of self-adhesive resin cement to resin-based CAD/CAM materials depends on material type and erosive aging, while surface pretreatments mainly affect failure mode.</p>

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Surface pretreatments and erosive aging effects on the bond strength of CAD/CAM resin-based materials with a self-adhesive resin cement

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月14日

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  • Sultan Aktuğ Karademir,
  • Samet Atasoy,
  • Serdar Akarsu,
  • Beyza Yilmaz

摘要

This laboratory study evaluated the effect of surface pretreatments and erosion on the shear bond strength (SBS) of additive (3D-printed; Crowntec™) and subtractive (milled; Cerasmart™ 270) CAD/CAM resin-based materials bonded with a self-adhesive resin cement. Seventy-two specimens of each material were assigned to three surface pretreatment groups: control, grit-blasting, and grit-blasting + universal adhesive (UA). After treatment, self-adhesive resin cement (Panavia™ SA Cement Plus) was applied using a mold (2.38 mm diameter, 3 mm height). Specimens were then divided into control, gastric acid, and citric acid groups and subjected to 96 h erosive aging (n = 8). SBS was tested with a universal testing machine, failure modes were examined under a stereomicroscope, and data analyzed using SPSS 21.0 (α = 0.05). Material type and erosion significantly affected SBS (p < 0.001), whereas surface pretreatments did not (p = 0.698). Crowntec showed decreased SBS in the grit-blasting + UA group after gastric acid (p = 0.02), while Cerasmart had reduced SBS in all pretreated groups after both acids (p < 0.05). Overall, Crowntec exhibited higher SBS with predominant cohesive failures, while Cerasmart showed mainly adhesive failures, except in the grit-blasting + UA group. The findings indicate that SBS of self-adhesive resin cement to resin-based CAD/CAM materials depends on material type and erosive aging, while surface pretreatments mainly affect failure mode.