Bovine Tooth Discoloration Induced by Endodontic Filling Materials for Primary Teeth

Table 3

Mean and standard deviation of variation in color values ( in the different experimental groups.

Group	Material	After restoration	1 week	1 month	3 months	6 months	9 months
I	MTA-based material
II	Vitapex
III	Calen + ZO
IV	ZOE
Control	Control

Same letters within the same period of time (column) indicate statistically similar results for the materials ().