The Shear Bond Strength Between Calcium Silicate-Based Biomaterials and Glass Ionomer Restorative Materials: An In...

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Restorative Dentistry

Background:

• Calcium silicate-based biomaterials and glass ionomer cements are widely used in restorative dentistry.
• Understanding the interfacial bonding characteristics between these materials is crucial for clinical success.
• Limited comparative data exists on the early shear bond strength of various combinations.

Purpose of the Study:

• To comparatively evaluate the shear bond strengths between four calcium silicate-based biomaterials and three glass ionomer restorative materials.
• To determine the influence of material type on the early bond strength at the biomaterial-restorative material interface.

Main Methods:

• An in vitro study involving 96 acrylic blocks with standardized cavities.
• Four calcium silicate-based biomaterials (ProRoot MTA, Biodentine, TheraCal LC, MTA BioRep) and three glass ionomer restorative materials (Fuji II LC, Equia Forte HT, Riva Self Cure) were tested in 12 experimental groups.
• Shear bond strengths were measured using a universal testing machine after 24h storage at 37°C and analyzed with Kruskal-Wallis and Mann-Whitney U tests (p < 0.05).

Main Results:

• Significant differences in shear bond strength were found based on both biomaterial and glass ionomer type (p < 0.05).
• The TheraCal LC-Fuji II LC combination exhibited the highest bond strength.
• The MTA BioRep-Equia Forte HT combination showed the lowest bond strength.

Conclusions:

• The combination of specific calcium silicate-based biomaterials and glass ionomer restorative materials significantly influences early shear bond strength.
• Material selection is a critical factor affecting the initial bonding behavior at the interface between biomaterials and restorative materials.
• Further research may explore long-term bonding and clinical implications.