0 Posterior Root Canal Spreader 0 Posterior Root Canal Spreader RCS0P .35 mm Posterior Root Canal Spreader is used to compact filling material during lateral condensation. Where to Buy x Category Dealer PartnersSales RepresentativeStrategic MarketsSchools RepresentativeAccutron™ Equipment Sales Zip Code Find RepresentativeReset Select a category, input a zip code and click on Find Representative, or explore the complete list here.