The pulpotomy technique consists in the extirpation of the coronary pulp and in the placement, in the entrance of the root canals, of a material that protects and preserves the vitality of the remaining pulp in the root. With that purpose, many pulp capping materials have been proposed, as the formocresol, glutaraldehyde, calcium hydroxide and more recently, the morphogenetic proteins. The aim of this work was the study of the action and use of those proteins, capable to induce the dentin formation, while capping agents of pulpar stumps in the pulpotomy.