Effectiveness of three different rotary systems in removing gutta percha from root canals
Keywords:
Retreatment, Rotary, Root canalAbstract
Background: The present study was conducted for comparing the effectiveness of three different Rotary systems in removing gutta percha from root canals. Materials & methods: 30 single rooted freshly extracted, mandibular premolars were collected and stored in 10% formalin until further use. Crowns of selected teeth were decoronated using diamond disc to standardize the working length to 16 mm for each specimen. Access preparation was done on each tooth and a size 10 K-type file was inserted into the canal until it was visible at the apical foramen to ensure that the canal was patent. Afterwards, all the specimens were randomly divided into three study groups according to type of retreatment system. Group A: ProTaper Universal retreatment Ni–Ti rotary instrumentation system, Group B: Mtwo retreatment Ni–Ti rotary instrumentation system, and Group C: R-Endo Ni–Ti rotary instrumentation system. After tooth splitting, each half of every specimen was separately imaged. Digitized images of each third of the root canal of each half of every specimen were obtained and evaluated.
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