Which materials can typically be used as a liner in dental procedures?

The use of varnish and glass ionomer as liners in dental procedures is widely accepted due to their unique properties and benefits in clinical practices. Varnish provides a protective layer that seals dentinal tubules, thus reducing sensitivity and helping to prevent caries. It can release fluoride, contributing to the remineralization of enamel and providing additional protection.

Glass ionomer, on the other hand, is known for its ability to chemically bond to both tooth structure and restorative materials. This allows it to provide a strong barrier against microbial invasion and has the added advantage of releasing fluoride, which can aid in the prevention of secondary caries. Its biocompatibility and effectiveness in providing a base or liner under other restorative materials make it a common choice in dental procedures.

The other materials mentioned, including composite, acrylic, limestone, resin, dental cement, and amalgam, do not serve the same functions as liners. They may be used for restoration or other purposes, but not typically as liners in the context of protecting the pulp and dentin in preparation for further restoration.