Recapitulation – Re-entering the canal using the smallest file after each file
preparation- purpose-to clean the apical portion of any dentine scrapping that was not
removed by irrigation – go beyond apex to avoid clogging of debris at apex – push file
apically
Continue with hand files – START STEP-BACK AFTER MAF
1MM LESS FOLLOW STEP-BACK – 45, 50
Continue with rotary – CROWN DOWN TECHNIQUE
MASTER CONE
CORESSPONDING TO MAF
MOLARS – 25 SIZE GP
INCISORS – 40 SIZE GP
Working Length Determination-
Major constriction / diameter also known as radiographic diameter
Should always end at minor constriction / diameter i.e. our working length - dentinocemental junc.
0.5 -1mm from the radiographic apex
Bmp & obt to be done till there
This is Grossman method – best method
MODIFICATIONS:-
If bone resorption at apex – 1.5mm short
If external root resorption – 2mm short
If open apex – put paper points & take radiograph of WLD
If file goes beyond apex – correct it to 1mm short – retake the xray – then only do BMP
