Copyright 2007 authorSTREAM.com. All rights reserved.http://www.authorstream.com/authorSTREAM raisv's Latest Presentations512/2/2008 10:30:55 PMThe elimination of micro organisms from root canal system is paramount success of root canal treatment. Most of the bacterial can be removed by instrumentation and using irrigating solutions but some of the bacteria such as entero coccus feacalis remain in root canal may cause endodontic failure. This bacteria commonly present in persistence pus and retreatment cases]]> ]]>Differential diagnosis of periapical lesion are very difficult. The most common periapical lesions are abscess, granuloma,and cyst.There are various methods to differentiate common periapical lesions such as IOPAs, ultrasonography, MRI, CTscans, t in our study we ysed IOPAs, and ultrasonography color power doppler.compared with histological findings. ultrasonography showing accurate results than IOPAs.]]> ]]>]]> ]]>]]> ]]>obturation is very important objective in success of endodontic therapy. there are various materials and methods. recently epiphany & gutta flow is been introduced. epiphany forms a monobloc by bonding to dentin, guttaflow is a Non-Heated Flowable obturation Material. here is a comparative study between these two.]]> ]]>it is vivo study comparing PRP & without PRP upto 3months, the results with PRP showing better results, this study is useful to focus using other materials combined with this material , further enhance healing. now this study is coming up with certain modifications , for future its a very good study.]]> ]]>