Introduction. Nasopalatine duct cysts (NPDCs) are the most common developmental epithelial non-odontogenic cysts of the upper maxilla. Their etiological origin is still uncertain; NPDCs are often asymptomatic and are usually found randomly through local radio-diagnostic investigations carried out for other reasons. Main body. The aim of this investigation is to analyze and discuss the etiology,...

background. maximum sealing ability or adhesion of endodontic sealers can be achieved after an effective removal of smear layer. endodontic irrigants assist in adequate removal of smear layer and thus improve the retention mechanism. the aim of this study was to evaluate the effect of two different root canal irrigating solutions (5.25% naocl followed by 17% edta and qmix) on the apical sealing...