Pulpdent EDTA Solution 17% 120ml Bottle For the Instrumentation of Root Canals and Smear Layer Removal. EDTA 17% Solution is buffered to a neutral pH and is an effective calcium binding or chelating agent used to facilitate instrumentation of root canals and for smear layer removal. It decalcifies the canal walls making it easier to enlarge and shape the canal with files and reamers. • An effective chelating agent • Decalcifies canal walls • Eases instrumentation of root canals • Buffered to a neutral pH EDTA Effectively Decalcifies Canal Walls SEM shows smear layer removal and opened dentinal tubules following treatment with EDTA.