Ab. Fuks et al., PULP RESPONSE TO FERRIC SULFATE, DILUTED FORMOCRESOL AND IRM IN PULPOTOMIZED PRIMARY BABOON TEETH, Journal of dentistry for children, 64(4), 1997, pp. 254
This study investigated the pulp response to a 15.5 percent ferric sul
fate solution (FS) and a 20 percent dilution of formocresol (DFC) in p
ulpotomized primary teeth of baboons, after four and eight weeks. Pulp
otomies were performed in seventy-nine primary teeth of 4 baboons. Aft
er coronal pulp resection, the pulp stumps were painted with ferric su
lfate for fifteen seconds, in thirty-two teeth (group 1); in another t
hirty-two teeth, a cotton pellet moistened with dilution of formocreso
l was placed over the pulp stumps for five minutes, and removed (group
2). In fifteen teeth, IRM was placed directly over the pulp stumps af
ter hemostasis (group 3 - control). The teeth of all groups were seale
d with IRM, and examined for inflammatory changes under a microscope b
y two blinded examiners. Seventy-seven teeth were assessed. Mild or no
inflammation was found in 58 percent (18/31) of the teeth of group 1,
in 48 percent (15/31) of those of group 2, and in 73 percent (11/15)
of those of group 3. Severe inflammation was found in 35 percent (11/3
1) of group 1, 29 percent (9/31) of group 2, and in 7 percent (1/15) o
f group 3. No statistically significant difference between the three g
roups was observed for degree of inflammation, periradicular or interr
adicular abscess or inflammatory root resorption (chi-square p > 0.05)
. Dentin bridges were observed in 52 percent (16/31) of the teeth in g
roup 1, 52 percent (16/31) of those of group 2, and in 73 percent (11/
15) of those of group 3. No difference was found between the experimen
tal and control groups for the presence of dentin bridge, (p > 0.05).
Ferric sulfate produced pulp responses that compared favorably to thos
e of diluted formocresol.