Abstract
BackgroundThe aim of the present study was to compare the effect of ultrasonically or laser (Nd:YAG or diode) activated irrigation on the irrigating solution extrusion compared to non-activated syringe irrigation.MethodsExtracted mandibular premolar teeth (n = 48) with single canals were instrumented. The teeth were secured through the lid of an Eppendorf tube filled with 1.0 mL distilled water to collect the apically extruded irrigating solution. The teeth were randomly divided into four groups: non-activated syringe irrigation, diode laser, Nd:YAG laser and passive ultrasonic irrigation (PUI) using 2 % NaOCl. The irrigating solution extruded through the apical foramen was collected in the Eppendorf tube and evaluated by a chemical reaction with using a spectrophotometer. The data was analyzed using one-way ANOVA and Tukey’s post hoc test (α = 0.05).ResultsAll the groups showed apically extruded irrigating solution. There were significant differences among the groups (p < 0.05). Nd:YAG laser activated irrigation showed greater extrusion (p < 0.05), while the non-activated syringe irrigation showed less extrusion (p < 0.05). Only the difference between diode laser and PUI was not statistically significant (p > 0.05).ConclusionWithin the limitations of this in vitro study, the researchers concluded that non-activated syringe irrigation caused less apically extruded irrigating solution than PUI and LAI using Nd:YAG or diode lasers.
Highlights
The aim of the present study was to compare the effect of ultrasonically or laser (ND:YAG or Diode) activated irrigation on the irrigating solution extrusion compared to non-activated syringe irrigation
The non-activated syringe irrigation showed less extrusion, while Laser-activated irrigation (LAI) using Nd:YAG laser showed a greater amount of extrusion
The amount of the extruded Sodium hypochlorite (NaOCl) in the Eppendorf tubes was determined by this chemical reaction of OCl− with I− in acidic solution
Summary
The aim of the present study was to compare the effect of ultrasonically or laser (Nd:YAG or diode) activated irrigation on the irrigating solution extrusion compared to non-activated syringe irrigation. Some studies suggest that the tip of an injection needle should be placed as close as possible to the apical end of the canal to clean the entire root canal length effectively [10,11,12]. It may Helvacıoğlu Kıvanç et al BMC Oral Health (2015) 15:71 increase the risk of extrusion of the solution [13]. As the irrigating solutions are usually cytotoxic, the possibility of an accidental extrusion beyond the apical construction should be considered during root canal irrigation
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