Journal of Conservative Dentistry
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Year : 2002  |  Volume : 5  |  Issue : 3  |  Page : 131-135

Effect Of Various Root Canal Irrigants On Removal Of Smear Layer And Debris – Scanning Electron Microscopic Study

Correspondence Address:
T. S Balaji

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Instrumentation of root canal results in formation of smear layer, which is an amorphous, relatively smooth layer of microcrystalline structure. The clinical impliation of smear layer is not understood. Obturating root canal in the presence of smear layer resulted in microleakage. Hence its removal is becoming unequivocal, which is achieved by root canal irrigants. The irrigant should be able to remove both organic and inorganic components of smear layer along with microbicidal property. The present study was conducted for comparative evaluation of effectiveness of EDTA 17%. Ethylenediamine – 5%, NaOCl – 4% and Saline when used either alone or in combination as intracanal irrigants to remove smear layer and debris. 50 single rooted teeth were selected, access cavities were prepared and working length was established. The teeth were divided into 5 groups of 10 each. Five groups of teeth irrigated with Saline, EDTA – 17%, NaOCl – 4%, EDTA and NaOCl alternatively and mixture of EDTA + ED respectively. The teeth were sectioned longitudinally and examined under scanning electron microscope for removal of smear layer and debris at different levels of root canal system. The intracanal irrigation was found effective when used in combination rather than used alone.

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