The formocresol will sterilize the inside of the tooth as well as “mummify” the remaining pulp. A different concept of formocresol pulpotomy procedure has been proposed where the formocresol pulpotomy is done with smaller access to the pulp chamber. Success Rate of MTA Pulpotomy on Vital Pulp of Primary Molars: A 3-Year Observational Study. Calcium hydroxide, ferric sulfate, formocresol, MTA, pulpotomy. 5.6.1.1 Formocresol Pulpotomy Technique 1. Pulpotomy is one of the techniques for treating dental decay in children.