Dental cavity liners are dental materials that are used to line the bottom of a prepared tooth cavity before the final filling material is placed. They are designed to provide a protective barrier between the tooth structure and the restorative material, aiming to prevent any harmful effects of the restorative material on the tooth.
The main purpose of dental cavity liners is to protect the pulp, the sensitive inner part of the tooth which contains blood vessels and nerves, from irritation and damage caused by the restorative materials or the oral environment. They act as a protective shield, sealing the dentin, the layer beneath the enamel, from any potential bacterial invasion or chemical irritation.
Cavity liners are typically composed of various materials, including calcium hydroxide, glass ionomer, or resin-based materials. Calcium hydroxide liners promote the formation of secondary dentin, aiding in the repair and regeneration of tooth structure. Glass ionomer liners have the ability to release fluoride, providing additional protection against tooth decay. Resin-based liners are often used for their adhesive properties, helping to bond the filling material strongly to the tooth structure.
In summary, dental cavity liners are dental materials placed within the prepared tooth cavity to protect the pulp and underlying tooth structure from any potential harm caused by the restorative materials or oral environment. They act as a barrier, preventing bacterial invasion, chemical irritation, and promoting tooth repair and regeneration.
