What is the function of a light source in photopolymerization of dental composites?
1) To generate heat for setting.
2) To activate the photosensitizer and initiate the polymerization reaction.
3) To cure the material by chemical reaction.
4) To improve the aesthetics of the restoration.
📝 Explanation:
The light source is crucial in the photopolymerization process as it activates the photosensitizer, usually camphorquinone, which in turn generates free radicals that initiate the polymerization of the resin.
MCQ