Iranian Dental Association Journal of Iranian Dental Association 3060-8201 23 3 2011 10 01 An experimental micro leakage study of two self-etch and one total-etch fissure sealants 182 188 EN Mina Biria Amir Ghasemi Kiyavash Doroudgar Siyamak Najafi-Abrandabadi Journal Article 2011 10 05 2013 02 23 Â An experimental micro leakage study of two self-etch and one total-etch Â fissure sealants Â Â Â Dr. Biria M .,1 Dr. Ghasemi A .,2 Dr. Doroudgar K .,3 Dr. Najafi-Abrandabadi S .4 Â Â 1 Assistant P rofessor, Department of Paediatric Dentistry , School of Dentistry, Shahid Beheshti University of Medical Sciences. Tehran, Iran. 2 Associate P rofessor, Department of Restorative Dentistry , School of Dentistry, Shahid Beheshti University of Medical Sciences. Tehran, Iran. 3 Postgraduate Student , Department of Oral Medicine , School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran. 4 Dentist. Â Â Â (Received 24 April, 2010 Accepted 15 June, 2011) Â Â Â Abstract Â Â Â Background and Aim : The extreme vulnerability to decay in pits and fissures on the occlusal surfaces of the teeth has prompted dental scientists to seek methods of caries prevention. Various criteria, such as bond strength, micro leakage and marginal seal are assessed in the evaluation of sealants. Motivated by the role of pit and fissure sealants in caries prevention, the aim of this study was to compare the micro leakage of Enamel Loc sealant, Concise and Concise +Prompt L-pop resin-based sealants. Â Materials and Methods : An in vitro study was undertaken using thirty extracted third molars. The teeth were divided into three groups an experimental group using Enamel Loc as a pit and fissure sealant, a group using ConciseÂ and a group using Concise +Prompt L-pop . The teeth were kept in methylene blue dye 2% for 4 hours, sectioned samples were observed with stereomicroscope for the extent of dye penetration and scores were based on Williams and Winter criteria. Three groups of data were statistically analyzed using SPSS 18. Non-parametric Kruskal-Wallis test was used to detect differences among groups (p>0/001). Â Results : The Enamel Loc sealant micro leakage was significantly more than the two other groups (p>0/001) . Furthermore, Concise micro leakage was significantly less than Concise +Prompt L-pop group (p>0/001). Â Conclusion :Â The Enamel Loc sealant performed worse in terms of sealing ability than the Concise and Concise +Prompt L-pop resin-based sealants. Â Key words: Dental caries â€“ Fissure sealant â€“ Pit and fissure â€“ Dental leakages Â Â Â Corresponding Author: Dr. Najafi-Abrandabadi S . , Dentist. Â e.mail: snajafi07@yahoo.com Â Â