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<p>To evaluate the repair bond strength of a nanohybrid resin composite to aged machinable hybrid ceramic after using three surface pretreatments. Specimens of the hybrid ceramic blocks were grouped into four groups based on the ceramic surface pretreatment: no treatment control group, bur grinding group, HF etched group, and grit-blasting group. All the groups were tested for surface roughness by an optical profilometer. Test groups were subdivided into immediate and aged groups based on aging protocol. A nanohybrid resin composite was placed onto prepared resin/ceramic hybrid material surfaces for the micro shear bond strength test. Deboned specimens were inspected using a stereomicroscope and a scanning electron microscope to determine the failure mode. Data was analyzed using ANOVA and the Tukey’s HSD test. One-way ANOVA test for surface roughness showed no significant difference among the differently pretreated surfaces. Two-way ANOVA after aging indicated significant differences of surface pretreatments and aging protocol on MSBSof the nanohybrid composite bonded to hybrid ceramic (<i>p</i> &lt; 0.05). Surface pretreatments increased the bond strength of resin composite bonded to hybrid ceramic material. Aging had a detrimental effect on MSBSof nanohybrid resin composite to hybrid ceramic.</p>

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Effect of surface pretreatments on surface roughness and repair bond strength of aged machinable hybrid ceramic with nanohybrid resin composite

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月24日

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  • Sara Abdelhady,
  • Hamdi Hamama,
  • Jukka P. Matinlinna,
  • Salah Mahmoud

摘要

To evaluate the repair bond strength of a nanohybrid resin composite to aged machinable hybrid ceramic after using three surface pretreatments. Specimens of the hybrid ceramic blocks were grouped into four groups based on the ceramic surface pretreatment: no treatment control group, bur grinding group, HF etched group, and grit-blasting group. All the groups were tested for surface roughness by an optical profilometer. Test groups were subdivided into immediate and aged groups based on aging protocol. A nanohybrid resin composite was placed onto prepared resin/ceramic hybrid material surfaces for the micro shear bond strength test. Deboned specimens were inspected using a stereomicroscope and a scanning electron microscope to determine the failure mode. Data was analyzed using ANOVA and the Tukey’s HSD test. One-way ANOVA test for surface roughness showed no significant difference among the differently pretreated surfaces. Two-way ANOVA after aging indicated significant differences of surface pretreatments and aging protocol on MSBSof the nanohybrid composite bonded to hybrid ceramic (p < 0.05). Surface pretreatments increased the bond strength of resin composite bonded to hybrid ceramic material. Aging had a detrimental effect on MSBSof nanohybrid resin composite to hybrid ceramic.