The process by which resin material is changed from a pliable state into a hardened restoration. Occurs through auto-curing or light-curing.

The process by which resin material is changed from a pliable state into a hardened restoration. Occurs through auto-curing or light-curing.

• A. Polymerization
• B. Flow
• C. Hardness
• D. Solubility

Answer: (A)

The main idea tested here is polymerization—the chemical process that turns a pliable resin into a solid restoration. In dental resins, the material starts as a flowable mixture of monomers. When polymerization occurs, those monomers link together to form polymers, creating a three-dimensional network that hardens the material. This curing can happen in two ways: auto-curing, where chemical initiators start the reaction on their own, and light-curing, where a light-activated initiator starts the reaction. Because polymerization is the actual process that changes the resin from soft to solid, it is the correct choice. Flow refers to how easily the resin moves before it sets, not the hardening itself. Hardness is a property measured after curing, not the curing process. Solubility describes how easily the material dissolves in a solvent, not how it sets.

The main idea tested here is polymerization—the chemical process that turns a pliable resin into a solid restoration. In dental resins, the material starts as a flowable mixture of monomers. When polymerization occurs, those monomers link together to form polymers, creating a three-dimensional network that hardens the material. This curing can happen in two ways: auto-curing, where chemical initiators start the reaction on their own, and light-curing, where a light-activated initiator starts the reaction. Because polymerization is the actual process that changes the resin from soft to solid, it is the correct choice.

Flow refers to how easily the resin moves before it sets, not the hardening itself. Hardness is a property measured after curing, not the curing process. Solubility describes how easily the material dissolves in a solvent, not how it sets.