Powerful pulp devitalize and disinfectant for severely infected root canal. Treatment of severely infected root canals.3 years from the date of Manufacturing. Dental relief oil Pyrocresol is used for root canal treatment by making a thick paste with zinc oxide so as to provide relief from pain. In addition could also used as a pulp or root filling material for painful molar flap and painful gums or ulcers. Pyrocresol is an aqueous solution used in vital primary teeth needing coronal pulpotomy. Dental relief oil Pyrocresol is used for root canal treatment by making a thick paste with zinc oxide so as to provide relief from pain. Keeping your teeth gums and mouth clean and healthy can prevent disease and infection and can help to avoid pain and sickness. Also a clean healthy mouth feels nice looks good and keeps your breath fresh. Benefits: 1. Root canal dressing. 2. Treatment of severely infected root canals.