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.
Background: The present study was conducted of assessing the prognosis of post and core supported crowns. Materials & methods: A total of 100 patients who underwent post and core treatment for dental rehabilitation were enrolled. the patients underwent post and core treatment. Radiographic assessment was done on subsequent follow-up. Both clinical and radiographic evaluation of all the patients was done for assessing the prognosis. Results were compiled in Microsoft excel sheet and were analyzed by SPSS software. Results: Out of 100 patients, successful prognosis of post and core treatment was seen in 93 percent of the patients while failure was seen in 7 percent of the patients. Non-significant results were obtained while assessing the correlation of prognosis with site. Conclusion: When done with adequate precaution, post and core treatment has good prognosis.
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