Ocena porównawcza dynamicznych i biernych systemów przepłukiwania kanału korzeniowego w aspekcie skuteczności oczyszczania kanału oraz ryzyka przepchnięcia środka płuczącego poza wierzchołek kanału
Irrigation in groups 2 and 3 was performed using tip-vented and side-vented irrigation needles, respectively. Both types of needles were first adapted for a disposable plastic syringe. Irrigation was started after using the Gates Glidden and then after all of the endodontic files by dispensing 1ml of NaOCl solution each time. The needle was inserted as far as possible into the root canal with an up and down movement, up to 2mm from the WL, without binding to the canal walls. The time of irrigation was constant for all of the canals, 30seconds for each 1ml dispensed.
All the experimental teeth received the same amount of 5.25% NaOCl irrigation with a total amount of 12 ml of NaOCl.
Apical extrusion evaluation
The copper moulds were weighed before seating the moulded teeth on them using an electronic balance (Precisa 180A – Swiss made) to the fourth decimal. This value was then compared to the post-instrumentation weight of the moulds after removing the moulded teeth. The amount of extruded irrigating solution was then measured by subtracting the post-instrumentation weight from the pre-instrumentation weight.
Cleanliness evaluation
The method for the cleanliness evaluation was a modified version of Al-Hadlaq et al. [18]. The teeth were removed from the stones and sectioned into two halves using a carborundum disk to [...]
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