To evaluate the influence of smear layer with different instruments and obturation methods on microleakage of root canal filled teeth: In vitro study.

Aims And Objectives: The success of root canal treatment depends on proper debridement, instrumentation, proper accessibility, and proper restoration. The presence of a smear layer is considered to be a significant factor. This in vitro study was conducted to assess the effect of the presence/absence of a smear layer on the microleakage of root canal filled teeth using different instruments and obturation methods.