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Dentin bonding performance and interface observation of an MMA-based restorative material
Junichi Shinagawa1, Go Inoue, Toru Nikaido
1Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.
Dental Materials Journal
|June 24, 2016
Summary
This study compared a new restorative material (BF) to a conventional resin cement (SB). BF showed higher bond strength but lower acid resistance, while sodium fluoride improved resistance at the cost of bond strength.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Restorative Dentistry
Background:
- 4-META/MMA-TBB based resin systems are used in dental restorations.
- Evaluating novel restorative materials for improved bonding and durability is crucial.
- The effect of additives like sodium fluoride on material performance requires investigation.
Purpose of the Study:
- To compare the bonding performance and dentin interface acid resistance of a new 4-META/MMA-TBB based restorative material (BF) against a conventional resin cement (SB).
- To assess the impact of sodium fluoride (NaF) addition on the properties of both materials.
Main Methods:
- Microtensile bond strength (µTBS) was evaluated on dentin treated with citric acid-ferric chloride or a self-etching primer.
- Restorative materials (BF and SB) with and without NaF were applied.
- Scanning Electron Microscopy (SEM) assessed the resin-dentin interface after an acid-base challenge.
Main Results:
- The TP/BF group exhibited the highest microtensile bond strength (µTBS).
- Addition of sodium fluoride (NaF) to the polymers decreased µTBS.
- While TP/BF showed interfacial erosion, NaF polymers enhanced the acid resistance of the resin-dentin interface.
Conclusions:
- The BF material demonstrated high µTBS but exhibited lower acid resistance at the dentin interface.
- Sodium fluoride (NaF) addition improved the acid resistance of the interface but reduced µTBS.
- Material selection involves balancing bond strength and interfacial durability against acid challenges.
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