HOSA Dental Terminology Practice

What role does an activator play in polymerization?

1. It strengthens the material

2. It initiates the bonding process

3. It reacts with the initiator

4. It enhances the color of the composite

The correct answer is: It reacts with the initiator

The role of an activator in polymerization is to participate in the initiation of the polymerization process. Specifically, an activator often reacts with the initiator to form free radicals or other reactive species that enable the polymerization reaction to commence. This interaction is crucial for the proper curing of dental materials, such as composites or sealants. Activators are typically used in conjunction with initiators to ensure that the bonding process occurs effectively, allowing for the material to set and harden properly in a dental context. Therefore, understanding the activator's function provides insight into how dental materials achieve their desired physical properties.