Bonding Agent
A chemical adhesive used in dental laboratories to promote adhesion between a porcelain or composite material and a metal or zirconia substructure.
Full Definition
A bonding agent is a chemical compound applied to a prepared substrate surface to enhance the mechanical and chemical bond between dissimilar dental materials, such as between opaque porcelain and a metal alloy coping or between a resin veneer and a zirconia framework. In laboratory contexts, bonding agents are critical to the longevity and delamination resistance of layered restorations. Editors should note that 'bonding agent' is distinct from a dental adhesive used chairside; in the lab context it specifically refers to the surface-treatment chemistry applied during fabrication. The term is sometimes incorrectly used interchangeably with 'primer,' which is a related but narrower concept.
Usage
Usage note: Always clarify whether 'bonding agent' refers to a lab-applied substrate treatment or a chairside adhesive; the distinction is critical in prosthetics documentation.
In Context
- "The technician applied a thin coat of bonding agent to the metal coping before the initial opaque firing." — Laboratory work order
- "Failure to use the recommended bonding agent can result in cohesive porcelain fractures at the metal–ceramic interface." — Technical manual