An intervention to provide protection to the pulp. A direct pulp cap is a procedure in which a drug or medicament (e.g. calcium hydroxide or mineral trioxide aggregate) is placed directly on the surface of an exposed pulp for the purpose of stimulating repair of the damaged or inflamed tissue. An indirect pulp cap involves placing a material, usually calcium hydroxide, on a thin residual layer of carious dentine remaining over the pulp to provide protection from external irritants.
Ricketts D. The management of the deep carious lesion and the vital pulp dentine complex. Br Dent J 2001;191:606–10.