Endodontic Irrigation Revisited: Historical Perspectives to Contemporary Properties

Abstract

Endodontic irrigation has long been recognized as a critical adjunct to mechanical instrumentation in root canal therapy. Historically, the concept of irrigation emerged with the realization that mechanical preparation alone was insufficient to completely eliminate pulp tissue remnants, microbial biofilms, and smear layer from the intricate root canal system. Early irrigation practices were limited to simple saline and antiseptic rinses, but progressive research led to the introduction of more effective solutions such as sodium hypochlorite, chlorhexidine, and chelating agents.

The primary purpose of irrigation is to complement canal shaping by dissolving organic and inorganic tissue, disinfecting areas inaccessible to instruments, and flushing out debris while minimizing bacterial persistence. Beyond microbial control, irrigation enhances the penetration of intracanal medicaments and improves the adaptability of root canal filling materials.An ideal irrigant should be potent against microorganisms, capable of dissolving necrotic tissue, and safe for periapical tissues without compromising dentin integrity.