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Ultra-morphological studies on enamel-universal adhesive interface.
San San May Phyo Aung1, Tomohiro Takagaki2, Masaomi Ikeda3
1Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan.
Journal of Dentistry
|November 14, 2020
Summary
Universal adhesives combined with self-adhesive resin cements show varying enamel etching and acid-base resistance. Optibond Universal (OB) demonstrated superior etching, and the MaxCem Elite Chroma (MC) group with OB exhibited durable bonding.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials
Background:
- Universal adhesives are frequently used before applying self-adhesive resin cements for dental restorations.
- Evaluating the interaction between these materials and enamel is crucial for long-term bonding durability.
Purpose of the Study:
- To assess enamel surface roughness after using universal adhesives with self-adhesive resin cements.
- To examine the enamel-adhesive interface integrity following an acid-base challenge.
Main Methods:
- Three self-adhesive resin cements (SA, CA, MC) were tested with three universal adhesives (UQ, PB, OB).
- Enamel surfaces were prepared, bonded, and subjected to surface roughness analysis (Sa) using 3D-CLSM.
- Scanning Electron Microscopy (SEM) evaluated the enamel-adhesive interface after an acid-base challenge.
Main Results:
- Optibond Universal (OB) resulted in significantly higher enamel surface roughness (Sa) compared to Prime&Bond Universal (PB) and Clearfil Universal Bond Quick (UQ).
- An acid-base resistant zone (ABRZ) was observed in all tested combinations, indicating varying degrees of material-dependent resistance.
- Statistically significant differences (p < 0.05) were noted among all experimental groups.
Conclusions:
- Optibond Universal (OB) exhibited the most effective etching of human premolar enamel.
- The MaxCem Elite Chroma (MC) cement combined with Optibond Universal (OB) demonstrated superior durability against acid-base challenges.
- Combining universal adhesives with self-adhesive resin cements offers a promising approach for reliable bonding in indirect restorative dentistry.
