שטיפת תעלות בעזרת אולטראסוניק יעילה הרבה יותר מאשר במזרק .הניסוי הוא על תעלות רחבות .
הרעיון עצמו נראה מבטיח אם כי דורש ציוד מיוחד- השטיפות הן עם 2% NaOCl ולכן נדרש ציוד מתאים אך ההשקעה כדאית, ולא רק לאנדודונטים .
October 2004 doi:10.1111/j.1365-2591.2004.00848.x
לפניכם האבסטרקט:
The effectiveness of syringe irrigation and ultrasonics to remove debris from simulated irregularities within prepared root canal walls
S.-J. Lee1, M.-K. Wu2 & P. R. Wesselink2
Abstract
Aim : To compare the ability of syringe irrigation and ultrasonic irrigation to remove artificially placed dentine debris from simulated canal irregularities within prepared root canals.
Methodology : After canal enlargement, twelve canines were split longitudinally into two halves. On the wall of one half of each root canal a standard groove of 4 mm in length, 0.2 mm in width and 0.5 mm in depth was cut, 2-6 mm from the apex, to simulate uninstrumented canal extensions. On the wall of the other half, three standard saucer-shaped depressions of 0.3 mm in diameter and 0.5 mm in depth were cut at 2, 4 and 6 mm from the apex to simulate uninstrumented canal irregularities. Each groove and depression were filled with dentine debris mixed with 2% NaOCl to simulate a situation when dentine debris accumulates in uninstrumented canal extensions and irregularities during canal preparation. Each tooth was re-assembled by reconnecting the two halves, using wire and an impression putty material.
Two per cent NaOCl was then delivered into each canal either using syringe irrigation (n = 8) or using ultrasonic irrigation (n = 8). Before and after irrigation, images of the two halves of the canal wall were taken, using a microscope and a digital camera, after which they were scanned into a PC as TIFF images.
The amount of remaining dentine debris in the grooves and depressions was evaluated by using a scoring system between 0-3: the higher the score, the more the debris.
The data were analysed by means of the Mann-Whitney U-test.
Results :Both forms of irrigation reduced the debris score significantly. The debris score was statistically significantly lower after ultrasonic irrigation than after syringe irrigation (P = 0.002 for grooves, P = 0.047 for depressions).
Conclusion: Ultrasonic irrigation ex vivo is more effective than syringe irrigation in removing artificially created dentine debris placed in simulated uninstrumented extensions and irregularities in straight, wide root canals
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