Efficacy of five rotary systems versus manual instrumentation during endodontic retreatment.

The purpose of this study was to evaluate the efficiency of ProFile, GT, ProTaper, Race and K3 rotary instruments compared with hand K-files for removal of gutta-percha during retreatment. Sixty mandibular premolars were instrumented with GT rotary files and filled by thermomechanical compaction of gutta-percha and AH Plus sealer. The teeth are randomly divided into 6 groups of 10 specimens each. The roots were split longitudinally, digital images were created using a flatbed scanner, and the areas with remaining filling material were demarcated using Image Tool 1.21 software. The results indicate that GT left significantly less (p<0.05) remaining filling material (1.18 ± 1.47) than hand (3.70 ± 3.16) and Hero instruments (2.99 ± 2.58). There was no statistically significant difference (p<0.05) among the others techniques: ProFile (1.99 ± 2.66), ProTaper (2.00 ± 1.99) and K3 (2.71 ± 2.87) when compared with GT. In conclusion, GT, ProFile, ProTaper and K3 were more effective in removing gutta-percha than manual and Hero instruments.

[1]  M. Kuga,et al.  Effectiveness of rotary or manual techniques for removing a 6-year-old filling material. , 2010, Brazilian dental journal.

[2]  C. Sabbagh,et al.  Effectiveness of two nickel-titanium rotary instruments and a hand file for removing gutta-percha in severely curved root canals during retreatment: an ex vivo study. , 2007, International endodontic journal.

[3]  M. Scelza,et al.  Efficacy of automated versus hand instrumentation during root canal retreatment: an ex vivo study. , 2006 .

[4]  O. Zmener,et al.  Retreatment efficacy of hand versus automated instrumentation in oval-shaped root canals: an ex vivo study. , 2006, International endodontic journal.

[5]  J. Schirrmeister,et al.  Effectiveness of a hand file and three nickel-titanium rotary instruments for removing gutta-percha in curved root canals during retreatment. , 2006, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[6]  N. Economides,et al.  Ex vivo study of the efficacy of H-files and rotary Ni-Ti instruments to remove gutta-percha and four types of sealer. , 2006, International endodontic journal.

[7]  M. Zaccaro Scelza,et al.  Efficacy of automated versus hand instrumentation during root canal retreatment: an ex vivo study. , 2006, International endodontic journal.

[8]  F. Barletta,et al.  Effectiveness of different techniques for removing gutta-percha during retreatment. , 2005, International endodontic journal.

[9]  M. Hülsmann,et al.  Efficacy, cleaning ability and safety of different rotary NiTi instruments in root canal retreatment. , 2004, International endodontic journal.

[10]  L. Fariniuk,et al.  Efficiency of the 0.04 taper ProFile during the re-treatment of gutta-percha-filled root canals. , 2002, International endodontic journal.

[11]  J. D. PÉcora,et al.  Modeling capacity of ENDOflash files in simulated root canals. , 2001, Brazilian dental journal.

[12]  J. Rhodes,et al.  The efficacy of gutta-percha removal using ProFiles. , 2001, International endodontic journal.

[13]  F. Weine,et al.  A comparison of the relative efficacies of four hand and rotary instrumentation techniques during endodontic retreatment. , 2000, International endodontic journal.

[14]  H. L. Lee,et al.  Effectiveness of ProFile .04 taper rotary instruments in endodontic retreatment. , 2000, Journal of endodontics.

[15]  G. Gambarini.  Shaping and cleaning the root canal system: a scanning electron microscopic study. , 1999 .

[16]  J. Siqueira,et al.  Histological evaluation of the effectiveness of five instrumentation techniques for cleaning the apical third of root canals. , 1997, Journal of endodontics.

[17]  M. Hülsmann,et al.  Efficacy, cleaning ability and safety of different devices for gutta-percha removal in root canal retreatment. , 1997, International endodontic journal.

[18]  S. Friedman,et al.  Endodontic retreatment—Case selection and technique. Part 3. Retreatment techniques , 1990 .

[19]  S. Friedman,et al.  Endodontic retreatment--case selection and technique. Part 2: Treatment planning for retreatment. , 1988, Journal of endodontics.

[20]  S. Madison,et al.  Endodontic retreatment: evaluation of gutta-percha and sealer removal and canal reinstrumentation. , 1987, Journal of endodontics.

[21]  Z. Metzger,et al.  Gutta-percha solvents--a comparative study. , 1986, Journal of endodontics.

[22]  B. Korzen,et al.  Evaluation of the apical seal produced by a hybrid root canal filling method, combining lateral condensation and thermatic compaction. , 1984, Journal of endodontics.