Aim of the study was To Compare the efficiency of R
ProTaper and R-Endo retreatment files in the removal of
conventional gutta-percha and resin coated gutta-percha and
time required. 60 extracted single root premolars were selected,
and then divi
ded into two groups according to the obturation
material. Next, each group was divided into two groups
according to the methods of retreatment.
Aim of the study: To study the effectiveness of using dental operating microscope
and ultrasonics with Hedstrom files in removing gutta-percha and sealer from root canals.
Materials and Methods: Twenty single straight rooted, extracted human mandib
ular
premolars were prepared, filled with gutta-percha and sealer (Zinc oxide with eugenol).
Specimens were then divided into two groups (N1=N2=10), and root filling material was
removed using H-files with Eucalyptol (group 1); H-files with Eucalyptol, followed by
using microscope with ultrasonic tip (group 2). After retreatment, the efficacy of each
technique was examined at 8× magnification with a stereomicroscope then the images were
analyzed using Auto-CAD 2010 according to Hulsmann and Stotz scale.
Data were statistically analyzed using Mann–Whitney U-tests.
This study aimed to asses of role of obturation material (zinc oxide and eugenol
cement with gutta-percha points, Resilon) on the efficiency of endodontic retreatment with Pro-taper
system of the following respects: the degree of cleanliness of the
canal, complications, working time.
