Effect of the demineralisation efficacy of MDP utilized on the bonding performance of MDP-based all-in-one adhesives
| Autor: | Satoshi Hirayama, Taro Iwasaki, Michael F. Burrow, Toru Nikaido, Kou Fujita, Yasuhiro Tanimoto, Norihiro Nishiyama |
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| Rok vydání: | 2018 |
| Předmět: |
Smear layer
Dental Cements Salt (chemistry) 02 engineering and technology Methacrylate 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine stomatognathic system Adhesives Materials Testing parasitic diseases Dentin medicine Dental Enamel General Dentistry chemistry.chemical_classification Enamel paint Bond strength Dental Bonding 030206 dentistry 021001 nanoscience & nanotechnology Phosphate Resin Cements body regions stomatognathic diseases medicine.anatomical_structure chemistry Dentin-Bonding Agents visual_art visual_art.visual_art_medium Methacrylates Adhesive 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Dentistry. 77:59-65 |
| ISSN: | 0300-5712 |
| Popis: | Objectives The amounts of calcium salt of 10-methacryloyloxydecyl dihydrogen phosphate (MDP-Ca salt) and dicalcium phosphate dihydride (DCPD) with an amorphous phase produced by the demineralisation of enamel and dentin were determined using commercial MDP-based 2-hydroxyethyl methacrylate (HEMA)-containing and HEMA-free all-in-one adhesives. The effect of the amount of MDP-Ca salt produced on bonding performance to enamel and dentin was then characterized. Methods Three types of commercial HEMA-containing adhesives (Scotchbond Universal Adhesive, Clearfil Tri-S Bond ND, Clearfil Tri-S Bond ND Quick), a commercial HEMA-free adhesive (G-Bond Plus) and an experimental HEMA-free adhesive were used. The reactant residues of each adhesive were prepared after interacting with enamel and dentin samples for 60 s. The amounts of MDP-Ca salt and amorphous DCPD produced were determined using a phosphorous-31 nuclear magnetic resonance technique. Enamel and dentin bond strengths were measured for each adhesive, with and without thermocycling. Results The amounts of MDP-Ca salt and amorphous DCPD formed after interacting with enamel and dentin differed among the five adhesives and were independent of their pH values. Enamel showed a strong positive-correlation of the bond strength of the all-in-one adhesives to the amount of MDP-Ca salt produced, however, the dentin showed a weak negative-correlation. Conclusion The HEMA-free all-in-one adhesives showed a greater efficacy to demineralise the enamel and dentin than the HEMA-containing all-in-one adhesives. The dentin showed a different effect of the amount of MDP-Ca salt produced on the bonding performance compared with enamel. Clinical significance The enamel bond strength of MDP-based all-in-one adhesives strongly contributes to the demineralisation efficacy by the incorporation of MDP, in contrast to the dentin bond strength. However, the efficacy of MDP-based all-in-one adhesives to demineralise the enamel and dentin is not directly related to the pH value of the MDP-based all-in-one adhesive. |
| Databáze: | OpenAIRE |
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