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Which type of sealant does not require mixing but instead cures when exposed to UV light?

  1. Self-cured sealant

  2. Chemically-cured sealant

  3. Light cured sealant

  4. Glass ionomer sealant

The correct answer is: Light cured sealant

Light-cured sealants are designed to harden or set when exposed to a specific wavelength of UV light, which makes them user-friendly and convenient in clinical settings. This type of sealant eliminates the need for mixing different components before application, reducing the risk of application errors and enhancing efficiency during dental procedures. In contrast, self-cured sealants depend on a chemical reaction that occurs when two components are mixed together, requiring careful handling and precise measuring. Chemically-cured sealants also involve a similar dual component approach, needing to be combined to initiate the setting process. Glass ionomer sealants, while versatile and beneficial due to their fluoride-releasing properties, also do not cure via UV light; instead, they harden through a chemical reaction and moisture. The specific curing method of light-cured sealants is what sets them apart in the context of this question.