What type of system is self-cured sealant material supplied in?

Self-cured sealant material is supplied as a two-part system, which typically consists of a base and a catalyst or hardener. When these two components are mixed together, a chemical reaction occurs that causes the sealant to harden or set without the need for an external curing agent like light or heat. This characteristic makes two-part self-cured sealants particularly useful in dental applications, as they can be easily manipulated and applied to the teeth before they cure in situ.

In contrast, a one-part system does not require mixing and is often ready to use straight from the container, which is not applicable for self-cured materials that need a reactive component to initiate curing. A three-part or four-part system would involve more components than necessary for the effective curing of sealant materials and is not typical for self-cured applications. Therefore, the two-part system is the correct choice for self-cured sealants.