Teeth assigned to Group 1 received iodoform paste as filling material (iodoform + camphorated parachlorophenol
+ ointment comprising 5.0 mg prednisolone acetate and 1.5 mg rifamycin); those allocated to Group 2 received Calen[R]/ZO paste; S.S.White Artigos Dentarios Ltda., Rio de Janeiro, Brazil) as filling material.
Various root canal filling materials used for primary teeth are; zinc oxide eugenol, iodoform containing pastes such as Kri paste (iodoform, camphor, menthol and parachlorophenol), Maisto paste (iodoform, camphor, menthol, parachlorophenol, zinc oxide, lanolin and thymol), Guedes-Pinto paste (iodoform, camphorated parachlorophenol
), Rifocort (prednisolone, iodoform, zinc oxide, calcium hydroxide, bariun sulphate, eugenol and parachlorophenol), Vitapex, Metapex and 3(MIX).1,2,3,4,6,7
Calcium hydroxide (CaO[H.sub.2]) was introduced as early as 1920, [Hermann, 1920] and it was suggested very early on that this material mixed with camphorated parachlorophenol
(CMCP) would induce a calcified barrier across the apex [Kaiser, 1964].