Where is a dental liner placed during cavity preparation?

A dental liner is specifically utilized to protect the pulp and promote healing in the deepest part of the cavity preparation. This placement is critical because the liner serves as a barrier between the restorative material and the sensitive pulp tissue when the cavity extends close to the nerve. The liners also help in providing thermal insulation and can have additional benefits, such as aiding in the remineralization of the tooth structure.

Placing the liner at the deepest portion ensures that it effectively covers the areas most susceptible to irritation or potential damage, particularly when restorative materials may be more irritating or when the cavity is deep. This strategic placement helps to minimize patient discomfort and improves the clinical outcome of the restoration.