Endodontic Treatment (Step Back Technique)
Endodontic treatment, (Step Back Technique. ) is also known as Telescopic canal, preparation or serial root canal preparation, step back technique, emphasizes keeping the apical preparation small and producing a gradual taper coronally.
This technique was first described in 1960 by Mullaney. Basically, this technique involves the canal preparation into two phases, phase I involves the preparation of apical constriction and phase II involves the preparation of the remaining canal phase. I evaluate the carious tooth before initiating endodontic treatment, prepare the access, cavity and locate the canal.
Orifices Establish the working length of the tooth using pathfinder. The working length is the distance between the reference point coronally and the anatomical apex, two ways to determine the working length. First, by x-ray that taken while the file is inserted in the canal. In this situation, the Apical foramen is usually found 0.5-1 mm shorter from the radiographic apex.
So, we need to decrease the length Second by Electronic apex locators That designed to determine the canal length by giving the reading when the file tip is at the apical foramen.
First, lubricate the instrument for use in apical area by EDTA or other lubricant, Now insert the first K file into the canal, with considering the working length with gentle, clockwise and anticlockwise rotation of file with minimal apical pressure does give remove the instrument and irrigate the canal Place the next larger size files to the working length in similar manner and again irrigate the canal. Don’t forget to recapitulate the canal with previous similar number of H file.
This breaks up apical debris, which are washed away with the irrigate Repeat the process until a size, 25 or 30 H-file that reaches the working length. That will be the master file or recapitulate between the files by placing it into the working length.
Phase II Place the next file in the series to a length 1 mm short of working length, remove it to irrigate and recapitulate Repeat the same procedure with successively larger files at 1 mm shorter from the previously used file. Finally, refining of the root canal is done by master apical file, with push-pull strokes to achieve a smooth, taper form of the root canal. Thank YOU.