Formocresol is a mixture consisting of formalin, cresol and glycerine used in dentistry.It is used for vital pulpotomy of primary teeth and as a temporary intracanal medicament during root canal therapy. Buckley’s solution is a 20% form of formocresol, diluted with glycerine and distilled water.
Formocresol has been used in dentistry since 100 years and for deciduous teeth pulpotomy since 80 years. The reparative, biologic approach to pediatric pulp therapy is either devitalization approach of formocresol pulptomy or pulpectomy. Formocresol was introduced to treat non-vital permanent teeth in the United States by Buckley in 1904.  In 1930, Sweet introduced the formocresol pulpotomy technique. Formocresol has subsequently become a popular pulpotomy medicament for primary teeth. Initially, the technique involved five visits. Sweet reduced the number of visits over the years, because of economic and behavior management considerations.