00 Anterior Root Canal Spreader .55 mm Anterior Root Canal Spreader used to compact filling material during lateral condensation What is it? Endodontic files and reamers are surgical instruments used by dentists when performing root canal treatment What is it used for? These tools are particularly used to clean and shape the root canal, with the concept being to perform complete chemomechanical debridement of the root canal to the length of the apical foramen.