Evaluation of new rotary spreaders for lateral condensation obturation

This study was done to evaluate new manufactured rotary spreaders one made from stainless steel material and second from nickel titanium and compared them with conventional finger spreader for their affect on the amount of gutta percha (in mg) that can be applied to fill the root canal and evaluation of apical extension of first, second, third and fourth auxiliary gutta percha cones for the standardized endodontic preparation in the endodontic acrylic training blocks (Endo Training Bloc-L, Dentsply-Maillefer, Ballaigues, Switzerland). In this study these endodontic acrylic blocks were prepared for endodontic filling by using K-files (Densply, Switzerland) star ng from size 10 ll size 30 in sequen al order at working length of 15mm (conven onal standardized endodontic preparation). The preparation was performed by using rotary hand piece (W&H; Austria) that can accept K-files with gear of 1:4, the hand piece and acrylic endodon c block were arrange in a surveyor in such a way that the files were at right angle to the surface of endodontic block. The preparation me for each size was 1 minute with 15 second irriga on with isopropyl alcohol perform before and a er using each file, then the prepared canal was filled with size 30 master gu a perch then the spreaders of this study was applied for 30sec followed by inser on of auxiliary gu a perch (size 20) and the apical extension of the first, second, third and fourth auxiliary gutta percha were detected and filling procedure was continue till no more auxiliary can be applied to prepared canal at 3mm from its coronal end, the weight of the endodon c blocks were detected before and after endodontic filling by using electronic balance and the difference was calculated for each group of this study which represent amount of gutta percha used inside the canal of endodontic block in milligram. Results showed that there was high statistical significant differences in amount of gutta perch and apical extension of auxiliary gutta percha when using the new rotary spreaders as compared with conven onal finger spreader at the P<0.01 and also the results showed that there was high sta s cal significant differences in amount of gutta perch and apical extension of auxiliary gutta percha when using the new rotary nickel tanium spreaders as compared with new stainless steel spreader at the P<0.01.