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 Indian J Med Microbiol  
 

Table 1: Comparison of the initial and the final perimeters (mm) after Mtwo instrumentation and after the final refinement with ultrasonic file and Hedströem file (H-file) of the cervical, medium and apical thirds

Table 1: Comparison of the initial and the final perimeters (mm) after Mtwo instrumentation and after the final refinement with ultrasonic file and Hedströem file (H-file) of the cervical, medium and apical thirds