Paper Information

Journal:   IRANIAN ENDODONTIC JOURNAL (IEJ)   2013 , Volume 8 , Number 1; Page(s) 6 To 9.
 
Paper: 

IN VITRO COMPARISON OF GUTTA-PERCHA REMOVAL WITH H-FILE AND PROTAPER WITH OR WITHOUT CHLOROFORM

 
 
Author(s):  KHALILAK ZOHREH, VATANPOUR MEHDI, DADRESANFAR BAHAREH*, MOSHKELGOSHA POUNEH, NOURBAKHSH HAMIDREZA
 
* DEPARTMENT OF ENDODONTICS, DENTAL BRANCH, ISLAMIC AZAD UNIVERSITY NUMBER 3, 10TH NEYESTAN STREET, PASDARAN AVENUE, POSTAL CODE: 19468, TEHRAN, IRAN
 
Abstract: 

Introduction: Removal of root filling materials is one of the key steps in success of root canal retreatment. The purpose of this study was to evaluate the efficacy of H-File and ProTaper with or without chloroform in the removal of gutta-percha during retreatment of mandibular premolars.
Materials and Methods: Sixty mandibular premolars with one canal, and curvatures less than 30 degrees were used in this experimental study. They were instrumented with K-files and laterally obturated with condensed gutta-percha using AH26 as the sealer and were stored in 100% humidity at 37oC for 2 weeks. The teeth were randomly divided into four groups of 15 teeth each. Removal of gutta-percha was performed with H-File and ProTaper. All techniques were used with or without chloroform. The teeth were split longitudinally and the area of remaining gutta-percha/sealer on the root canal wall was explored under stereomicroscope. Retreatment time duration was also recorded for each sample. Data were analyzed statistically by Two-way ANOVA, t-test and Tukey’s.
Results: In all groups, no significant difference was found in remaining gutta-percha and sealer with or without using chloroform, but chloroform shortened the time of retreatment. ProTaper left significantly less remaining filling materials than H-File (P<0.05). Retreatment time was significantly different between the studied groups (P<0.001).
Conclusion: ProTaper Ni-Ti instruments proved to be more efficient and time-saving devices for removal of gutta-percha compared to H-File in canals with no or slight curvature.

 
Keyword(s): CHLOROFORM, ENDODONTIC, GUTTA-PERCHA, H-FILE, NITI ROTARY SYSTEM, RETREATMENT
 
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