Formacresol, gluteraldehyde, ferric sulphate and calcium hydroxide are historically and widely being used. But recently the trend is shifting towards MTA because of its wonderful properties. The choice of material is based on our expetation from treatment out come (convetional pulpotomy/apexogenesis). various materials used for pulpotomy can be grouped as
Regeneration: Calcium Hydroxide,MTA, Bone morphogenic proteins
MTA appears to be the best among them but if cost is the criteria formocresol can be the material of choice. There is tremendous literature available in this matter. let me know if you need further information
Drugs with formol-aldeids were banning by FDA for investigations that shows relation with cancer and it uses... many dental schools after that eliminated'em from study plan.
I agree with Alain, Formocresol is known to cause Nasopharyngeal carcinoma. But the reason behind it is inhalation of formalin/formocresol fumes in high quantities for relatively longer period, the possibilities of which is rare in dental practice moreover the volume of formocresol used by dentist is extremely low. But theoretical risk still exists. So the carcinomas associated with formocresol in dental practice is a debatable topic and fortunately there is no such reported cases in the history of dentistry where any direct relation is attributed. In India formocresol is still being widely used for pulpotomy of primary teeth. But now as we have many better options one can choose other alternates.
pulpotomy is a procedure performed for deciduous dentition and is not recommended for adult as endodontic treatment is common and a best materials are (Biodentin or MTA) as a two recent materials with good result.
Studies showed that ferric sulfate is superior to formocresol in pulpotomy for primary teeth. For pulpotomy in immature permanent teeth calcium hydroxide & MTA are of choice.