الفهرس 
Root canal microfloraOnly 14 pages are availabe for public view
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Abstract
The use of biocompatible intracanal medications possessing antimicrobial properties between appointments may reduce or eliminate bacteria in the root canal system and significantly increase the success of root canal treatment. So this in vitro study was performed to evaluate the antimicrobial effect of different types of intracnal medications against different microorganisms.Eighty four intact single rooted human premolars with single straight root canals extracted for periodontal or orthodontic causes were selected. The clinical crowns were removed at the level of the cemento enamel junction, using a water-cooled diamond disk mounted in a low-speed hand piece leaving the roots of approximately 15 mm±1 and were stored in a sterile physiologic saline solution at room temperature that is changed daily until use.The pulp tissue was removed, the working length was determined and the root canals were prepared using step-back technique up to MAF #40 under irrigation of 2.5% sodium hypochlorite solution. The apical foramina were then sealed with light-cured composite resin and the canals were flushed with 17% EDTA for 1 min followed by 5 ml of 5.25% NaOCL for 3min to remove the smear layer.