In vitro assessment of the roles of initial preparation size and solvent application on apically extruded debris in endodontically treated teeth.

Background: This study investigated the effects of solvent use and initial canal enlargement size on apically extruded debris (AED).

Methods: The palatal roots of 60 upper molars were assigned to two groups based on the initial preparation size: F3 or F4 ProTaper Universal files. The roots were obturated using the single-cone technique.