Laboratory evaluation of Amalgambond and Amalgambond Plus

Area of Science:

• Dental Materials Science
• Adhesive Dentistry
• Restorative Dentistry

Background:

• Dental restorations require strong adhesion to tooth structure for longevity.
• Evaluating adhesive systems is crucial for optimizing restorative material performance.
• Microfilled resin composites and amalgam alloys are common restorative materials with different bonding characteristics.

Purpose of the Study:

• To assess the shear bond strength (SBS) of a microfilled resin restorative material and an amalgam alloy to dentin.
• To investigate the influence of the Amalgambond Plus adhesive system under various bonding conditions.
• To compare the bonding efficacy of resin composite versus amalgam alloy to dentin.

Main Methods:

• The study evaluated the shear bond strength (SBS) of Silux Plus (microfilled resin) and Dispersalloy (amalgam alloy) to dentin.
• Bonding regimens included dry and moist dentin, using open-ended plastic matrices and closed-ended gelatin capsules.
• The Amalgambond Plus adhesive system was utilized for all bonding procedures.

Main Results:

• The mean SBS for Silux Plus to dentin ranged from 17.55 to 22.47 MPa without HPA powder and 20.33 to 22.50 MPa with Amalgambond Plus.
• No significant differences in SBS were found based on dentin moisture (wet vs. dry) or matrix type (open vs. closed).
• The mean SBS for Dispersalloy (amalgam) to dentin using Amalgambond Plus was 10.41 MPa.

Conclusions:

• The Amalgambond Plus adhesive system provides consistent shear bond strength for microfilled resin to dentin, irrespective of dentin surface moisture or matrix configuration.
• Multiple applications of the Amalgambond adhesive did not significantly enhance the SBS.
• Amalgam alloy exhibited a lower shear bond strength to dentin compared to the microfilled resin composite when using the Amalgambond Plus system.