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Surface moisture influence on etch-and-rinse universal adhesive bonding.

Runa Sugimura1, Akimasa Tsujimoto2, Yumiko Hosoya3

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Surface moisture significantly impacts universal adhesives

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Area of Science:

  • Dental Materials Science
  • Adhesive Dentistry
  • Biomaterials

Background:

  • Universal adhesives offer versatility in dental bonding.
  • Etch-and-rinse mode is a common application technique.
  • Surface moisture management is critical for bond integrity.

Purpose of the Study:

  • To investigate the effect of surface moisture on universal adhesive performance.
  • To compare bonding effectiveness on moist versus dry enamel and dentin.
  • To evaluate universal adhesives in etch-and-rinse mode.

Main Methods:

  • Four universal adhesives were tested: All-Bond Universal, G-Premio Bond, Prime&Bond Active, and Scotchbond Universal Adhesive.
  • Shear bond strengths were assessed after 24 hours and 10,000 thermal cycles.
  • Scanning electron microscopy examined adhesive interfaces.

Main Results:

  • Surface moisture influenced universal adhesive bond durability to dentin, but not enamel.
  • Bond durability to dentin varied with surface moisture for some adhesives (All-Bond Universal, G-Premio Bond).
  • Resin tag length was greater in moist conditions, though layer thicknesses remained unaffected.

Conclusions:

  • Dentin surface moisture is a significant factor for universal adhesive bonding in etch-and-rinse mode.
  • Some universal adhesives demonstrate stable bonding regardless of surface moisture.
  • Optimized formulations may mitigate moisture-related bond variability.