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Related Experiment Video

Updated: Jun 20, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

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AMORPHOUS CALCIUM PHOSPHATE COMPOSITES AND THEIR EFFECT ON COMPOSITE-ADHESIVE-DENTIN BONDING.

J M Antonucci¹, J N R O'Donnell, G E Schumacher

¹Polymers Division, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA.

Journal of Adhesion Science and Technology

|August 22, 2009

Summary

This study tested amorphous calcium phosphate (ACP) composites for dental bonding. Milled ACP composites showed better adhesion and mechanical properties, suggesting clinical potential despite some bond strength reduction after aging.

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Area of Science:

Dental Materials Science
Polymer Chemistry
Biomaterials Engineering

Background:

Photo-polymerizable amorphous calcium phosphate (ACP) composites offer remineralizing potential for dental applications.
Evaluating the bond strength and durability of ACP composites to dentin is crucial for clinical efficacy.

Purpose of the Study:

To assess the bond strength and mechanical properties of experimental ACP composite-adhesive systems to dentin.
To compare the performance of different amorphous calcium phosphate fillers (as-prepared vs. milled) and a fluoride glass.
To investigate the effects of aqueous aging on the bond strength and failure modes of these dental composites.

Main Methods:

Formulation of two experimental ACP composite systems (BTHZ and ETHM) using photo-activated resins and various fillers.
Determination of shear bond strength (SBS), work to fracture, and failure modes of composites bonded to dentin.
Evaluation of specimens after aqueous aging at 37 °C for different time periods.

Main Results:

The shear bond strength of base and lining ACP composites was not significantly affected by filler type or immersion time.
In orthodontic ACP composites, milled ACP fillers demonstrated initial mechanical advantages over as-prepared fillers.
After six months of aging, 80% of specimens failed at the dentin-primer interface, with a 42% reduction in bond strength.

Conclusions:

Experimental ACP composites show potential as anti-demineralizing-remineralizing agents for dental use.
Milled ACP composites exhibit superior initial mechanical properties and adhesion characteristics compared to as-prepared ACP composites.
Further research into milled ACP composites is warranted due to their promising potential in clinical applications like base-liners and orthodontic cements.