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<p>This study evaluated the effect of different resin cements (RCs) on the push-out bond strength (BS) of CAD-CAM milled glass fiber posts (GFPs) in different intraradicular levels (cervical, middle and apical). Thirty-three single-rooted premolars were standardized to 14-mm root length. Canals were prepared using gutta-percha and calcium hydroxide-based sealer (Sealer 26) via the single-cone technique. After removing 9&#xa0;mm of filling, canals were molded with acrylic resin to produce CAD-CAM GFPs (Fiber CAD Lab) by subtractive manufacturing. GFPs were randomly cemented (<i>n</i> = 11) using: self-etching dual-cure RC (Panavia F2.0), conventional dual-cure RC (RelyX Ultimate), or self-cure RC (Multilink N), per manufacturer instructions. After 48&#xa0;h, roots were sliced (cervical, middle, apical) and subjected to push-out testing (0.5&#xa0;mm/min). Failure mode (FM) was assessed (40 × magnification). BS data were analyzed by two-way ANOVA/Tukey (α = 0.05); FM by Fisher’s exact test. The self-etching dual-cure RC showed significantly higher BS than the self-cure RC (<i>p</i> &lt; 0.05). Conventional dual-cure RC showed intermediate values (<i>p</i> &gt; 0.05). Root thirds showed no significant differences. FM was unaffected by RC or root region (<i>p</i> &gt; 0.05), with mixed failures predominating. The bond strength of milled GFPs was influenced by the resin cement type, but not by the root third.</p>

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Effect of different luting agents on the bond strength of CAD-CAM milled glass fiber posts to different levels of root-dentin

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • Paulo Vitor Oyama,
  • João Pedro Rangel-Coelho,
  • Mayara Zaghi Dal Picolo,
  • Fabiana Mantovani Gomes França,
  • Roberta Tarkany Basting,
  • Cecilia Pedroso Turssi,
  • Flávia Lucisano Botelho Amaral

摘要

This study evaluated the effect of different resin cements (RCs) on the push-out bond strength (BS) of CAD-CAM milled glass fiber posts (GFPs) in different intraradicular levels (cervical, middle and apical). Thirty-three single-rooted premolars were standardized to 14-mm root length. Canals were prepared using gutta-percha and calcium hydroxide-based sealer (Sealer 26) via the single-cone technique. After removing 9 mm of filling, canals were molded with acrylic resin to produce CAD-CAM GFPs (Fiber CAD Lab) by subtractive manufacturing. GFPs were randomly cemented (n = 11) using: self-etching dual-cure RC (Panavia F2.0), conventional dual-cure RC (RelyX Ultimate), or self-cure RC (Multilink N), per manufacturer instructions. After 48 h, roots were sliced (cervical, middle, apical) and subjected to push-out testing (0.5 mm/min). Failure mode (FM) was assessed (40 × magnification). BS data were analyzed by two-way ANOVA/Tukey (α = 0.05); FM by Fisher’s exact test. The self-etching dual-cure RC showed significantly higher BS than the self-cure RC (p < 0.05). Conventional dual-cure RC showed intermediate values (p > 0.05). Root thirds showed no significant differences. FM was unaffected by RC or root region (p > 0.05), with mixed failures predominating. The bond strength of milled GFPs was influenced by the resin cement type, but not by the root third.