What is the function of a cavity liner?

The function of a cavity liner is to protect pulpal tissue from irritation. Cavity liners are thin coatings applied to the floor and walls of a cavity preparation to create a barrier between the restorative material and the pulp of the tooth. This is particularly important when the cavity is deep and close to the pulp, as it helps to reduce the risk of pulp irritation from materials that may contain acids or other irritants.

By providing this protective layer, cavity liners help to maintain the health of the dental pulp and reduce sensitivity, making them an essential component in restorative dentistry. This protective function is critical in ensuring the longevity of the tooth and the success of the restoration.