COMPARISON OF 3 DIFFERENT ROTARY RETRETMENT FILE SYSYEM Non-surgical endodontic retreatment is an attempt to re-establish healthy periapical tissues after inefficient treatment or reinfection of an obturated root canal system because of coronal or apical leakage

Mtwo Retreatment File R Endo Retreatment File ProTaper D Retreatment File

Dentsply D1 size 30, 0.09 taper

D2 size 25, 0.08 taper

D3 size 20, 0.07 taper

VDW

R1 (size 25, 0.05 taper) R2 (size 15, 0.05 taper)

Micro-Mega Re (size 25, 0.12 taper) R1 (size 25, 0.08 taper) R2 (size 25, 0.06 taper) R3 (size 25, 0.04 taper)

GROUP I

Mtwo Re-

treatment

File

(VDW, Munich,

Germany)

GROUP II

Protaper D

(Dentsply

Maillefer, Bal-

laigues, Switzer-

land)

GROUP III

R Endo

(Micro-Mega,

Besancon,

France)

R Endo

Protaper D Mtwo