Did in‐between rinsing and agitating with distilled water prevents precipitate formation by the interaction between sodium hypochlorite and chlorhexidine canal irrigants?

摘要: The interaction of sodium hypochlorite (NaOCl) and chlorhexidine gluconate (CHX) produces an orange‐brown precipitate. The present study evaluated the influence of distilled water (H2O) in different irrigation protocols designed to prevent the formation of precipitate with NaOCl and CHX. Fifty canine teeth were instrumented and split longitudinally. The canal was examined with a stereomicroscope and photographed by canal‐thirds. The tooth halves were repositioned and distributed randomly into five groups, according to the final irrigation protocol (n = 10): G1 (control)—Ethylenediaminetetraacetic acid (EDTA) + NaOCl + CHX, conventional irrigation (CI); G2—EDTA + NaOCl + CHX, activated with passive ultrasonic irrigation (PUI); G3—EDTA (PUI) + NaOCl (PUI) + H2O (CI) + CHX (PUI); G4—EDTA + NaOCl + H2O + CHX (PUI); G5—EDTA (PUI) + NaOCl (PUI) + H2O (continuous …