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Moist versus dry dentin: its effect on shear bond strength
1School of Dental Medicine, SUNY at Stony Brook.
American Journal of Dentistry
|June 1, 1992
Summary
Applying dentin bonding systems to moist dentin significantly improved shear bond strength for most hydrophilic systems, except Gluma. Acetone-containing systems and Amalgambond showed enhanced bonding to moist dentin.
Area of Science:
- Dental Materials Science
- Adhesive Dentistry
- Biomaterials
Background:
- Dentin bonding systems (DBS) are crucial for dental restorations.
- Surface moisture significantly impacts DBS performance and bond strength.
- Hydrophilic primers are designed to interact with dentin moisture.
Purpose of the Study:
- To compare the shear bond strengths of hydrophilic dentin bonding systems.
- To evaluate the effect of air-dried versus moist-dried dentin on bond strength.
- To investigate the role of acetone in hydrophilic DBS performance.
Main Methods:
- Five hydrophilic dentin bonding systems were tested.
- Systems were applied to both air-dried and blot-dried (moist) dentin surfaces.
- Shear bond strength was measured to quantify bonding efficacy.
Main Results:
- All Bond, Amalgambond, Mirage Bond, and Tenure showed significantly improved shear bond strength on moist dentin.
- Mirage Bond exhibited a fourfold increase in bond strength when applied to moist dentin.
- Gluma's bond strength was compromised on moist dentin, unlike other hydrophilic systems.
Conclusions:
- Hydrophilic dentin bonding systems, particularly those containing acetone, benefit from moist dentin application for enhanced micro-mechanical retention.
- Acetone likely aids deeper resin penetration into dentin, improving bond strength.
- Amalgambond's hydrophilicity and hybridization contribute to strong bonds on moist dentin, while Gluma's performance is negatively affected by moisture.