What is commonly added to lessen the sensitivity of a tooth between fillings?

The choice of primer as a commonly added substance to lessen the sensitivity of a tooth between fillings is based on its role in dental procedures, particularly in adhesive dentistry. Primers contain agents that help to enhance the bond between the tooth structure and the filling material. By creating a better seal and reducing microleakage at the interface of the tooth and the restoration, primers can help alleviate sensitivity that patients might experience after cavity preparation.

Additionally, primers often contain components that can immediately help soothe or desensitize the exposed dentin following the removal of decay. This action is crucial since exposed dentin can lead to increased sensitivity to temperature changes or pressure before the final filling is placed. By addressing this sensitivity, primers contribute to patient comfort and improve overall treatment outcomes.

Calcium hydroxyapatite and fluoride varnish, while they may have benefits in terms of remineralization and reducing sensitivity, are not typically used prior to placing fillings for the purpose of managing dentinal sensitivity during the procedure. Bonding resins are mainly used to adhere the restoration to the tooth and do not play a direct role in reducing sensitivity in the same manner as primers do.