Methods: The experiments were carried out on 24 healthy premolars. Dentine was exposed at cervical with round diamond bur, etched with phosphoric acid and divided into 4 groups equally (6 teeth/group). Replica technique was used in the first group with impression material (Xantopren® VL, Heraeus Kulzer division, Hanau, Germany) and pouring using acrylic resin (Stycast® 1266 acrylic resin; Hitek electronic materials Ltd., Humberside, UK). The second, third and fourth group replicated after applied Colgate® OriginalTM dentifrice (Colgate-Palmolive (Thailand) Co. Ltd.), Colgate® Sensitive Pro-Relief™ dentifrice (Colgate-Palmolive (Thailand) Co. Ltd.) and SE bond (Clearfil™ SE bond; Kuraray, Tokyo, Japan), respectively. Replicas were determined in scanning electron microscope.
Results: The micromorphology of replica presented exposed dentinal tubule in group 1 and 2. Partially occluded dentinal tubules after applied Colgate® Sensitive Pro-Relief™ and covered the exposed dentine after applied SE bond.
Conclusions: Desensitizing dentifrice containing arginine could partially occluded dentinal tubule in exposed dentine.