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Immediate Pre-Endodontic Dentin Sealing (IPDS) Improves Resin-Dentin Bond Strength
Marco A Carvalho1, Priscilla C Lazari-Carvalho1, Paulo E T Maffra2
1School of Dentistry, Evangelical University of Goiás (UniEVANGÉLICA), Anápolis, Brazil.
Summary
Applying dentin hybridization before endodontic treatment significantly improves resin-dentin bond strength. Delaying this step requires substantial tooth structure removal to restore bond strength, highlighting the importance of early intervention for better outcomes.
Area of Science:
- Dental Materials Science
- Endodontics
- Adhesive Dentistry
Background:
- Endodontic procedures involve chemicals and sealers that negatively impact dentin bond strength.
- Maintaining the integrity of the resin-dentin bond is crucial for the longevity of endodontically treated teeth.
Purpose of the Study:
- To evaluate a novel clinical protocol for enhancing resin-dentin microtensile bond strength (μTBS) in endodontically treated teeth.
- To investigate the effect of the timing of dentin hybridization on bond strength after endodontic treatment.
Main Methods:
- Human molars were divided into four groups: control, late dentin hybridization (LDh), immediate pre-endodontic dentin sealing (IPDS), and post-endodontic late dentin hybridization (PLDh).
- Dentin hybridization timing varied: before chemical exposure (IPDS), after chemical exposure (LDh), or after chemical exposure and repreparation (PLDh).
- Teeth were restored with resin composite, and μTBS was assessed after 24 hours.
Main Results:
- The PLDh, IPDS, and control groups exhibited the highest bond strength values, with no significant differences among them.
- The LDh group showed the lowest bond strength, representing a 70% decrease compared to the control group.
- Dentin hybridization performed before chemical exposure significantly improved bond strength.
Conclusions:
- Dentin hybridization prior to endodontic chemical exposure is critical for maintaining optimal resin-dentin microtensile bond strength.
- Performing dentin hybridization after endodontic treatment necessitates significant repreparation of dentin to regain bond strength.
- Early dentin hybridization preserves tooth structure, potentially reinforces weakened cusps, and improves isolation, offering significant clinical advantages.
