Efficacy of ProTaper Universal rotary retreatment system for gutta-percha removal from root canals.

AIM To evaluate the efficacy of the ProTaper Universal rotary retreatment system for gutta-percha (GP) removal from root canals. METHODOLOGY Root canals of 60 extracted human maxillary anterior teeth were prepared and filled with laterally condensed GP and AH Plus sealer. Teeth were divided into three groups: group A--GP removal completed with the ProTaper Universal rotary retreatment system and with further canal repreparation accomplished with ProTaper Universal rotary instruments; group B--GP removal was completed using Gates Glidden drills and Hedström files with chloroform as a solvent, followed with further canal repreparation with ProTaper Universal rotary instruments; group C--the same as group B for GP removal with further canal preparation with stainless steel K-flex files (Kerr). The operating time was recorded. Teeth were rendered transparent for the evaluation of the area of remaining GP/sealer in bucco-lingual and mesial-distal directions. Statistical analysis was performed by using repeated measures analysis of variance and anova. Results The ProTaper Universal technique (group A) resulted in a smaller percentage of canal area covered by residual GP/sealer than in groups B and C, with a significant difference between groups A and C (P < 0.05). Mean operating time for group A was 6.73 min, which was significantly shorter (P < 0.05) than group B (10.86 min) and group C (13.52 min). CONCLUSIONS In this laboratory study all test techniques left GP/sealer remnants within the root canal. The ProTaper Universal rotary retreatment system proved to be an efficient method of removing GP and sealer from maxillary anterior teeth.

[1]  K. M. Meyer,et al.  Detectability of residual Epiphany and gutta-percha after root canal retreatment using a dental operating microscope and radiographs--an ex vivo study. , 2006, International endodontic journal.

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

[3]  K. M. Meyer,et al.  Efficacy of different rotary instruments for gutta-percha removal in root canal retreatment. , 2006, Journal of endodontics.

[4]  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.

[5]  E Schäfer,et al.  Comparative study on the shaping ability and cleaning efficiency of rotary Mtwo instruments. Part 1. Shaping ability in simulated curved canals. , 2006, International endodontic journal.

[6]  E Schäfer,et al.  Comparative study on the shaping ability and cleaning efficiency of rotary Mtwo instruments. Part 2. Cleaning effectiveness and shaping ability in severely curved root canals of extracted teeth. , 2006, International endodontic journal.

[7]  K. M. Meyer,et al.  Effectiveness of hand and rotary instrumentation for removing a new synthetic polymer-based root canal obturation material (Epiphany) during retreatment. , 2006, International endodontic journal.

[8]  P Martus,et al.  Comparative study of six rotary nickel-titanium systems and hand instrumentation for root canal preparation. , 2005, International endodontic journal.

[9]  P. Dummer,et al.  Shaping ability of RaCe rotary nickel-titanium instruments in simulated root canals. , 2005, Journal of endodontics.

[10]  R M Love,et al.  Shaping ability of ProFile and K3 rotary Ni-Ti instruments when used in a variable tip sequence in simulated curved root canals. , 2004, International endodontic journal.

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

[12]  E Schäfer,et al.  Comparative investigation of two rotary nickel-titanium instruments: ProTaper versus RaCe. Part 1. Shaping ability in simulated curved canals. , 2004, International endodontic journal.

[13]  Mian K Iqbal,et al.  Comparison of apical transportation in four Ni-Ti rotary instrumentation techniques. , 2003, Journal of endodontics.

[14]  E Schäfer,et al.  Efficiency of rotary nickel-titanium K3 instruments compared with stainless steel hand K-Flexofile. Part 1. Shaping ability in simulated curved canals. , 2002, International endodontic journal.

[15]  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.

[16]  K. Barrieshi-Nusair.  Gutta-percha retreatment: effectiveness of nickel-titanium rotary instruments versus stainless steel hand files. , 2002, Journal of endodontics.

[17]  E Schäfer,et al.  Efficiency of rotary nickel-titanium FlexMaster instruments compared with stainless steel hand K-Flexofile--Part 2. Cleaning effectiveness and instrumentation results in severely curved root canals of extracted teeth. , 2002, International endodontic journal.

[18]  E. Schäfer,et al.  Efficiency of rotary nickel-titanium FlexMaster instruments compared with stainless steel hand K-Flexofile--Part 1. Shaping ability in simulated curved canals. , 2002, International endodontic journal.

[19]  C. Bramante,et al.  Quantec SC rotary instruments versus hand files for gutta-percha removal in root canal retreatment. , 2001, International endodontic journal.

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

[21]  J F Siqueira,et al.  Aetiology of root canal treatment failure: why well-treated teeth can fail. , 2001, International endodontic journal.

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

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

[24]  P. Nair,et al.  Persistent periapical radiolucencies of root-filled human teeth, failed endodontic treatments, and periapical scars. , 1999, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[25]  C. Reit,et al.  Microbiological status of root-filled teeth with apical periodontitis. , 1998, International endodontic journal.

[26]  G. Sundqvist,et al.  Influence of infection at the time of root filling on the outcome of endodontic treatment of teeth with apical periodontitis. , 1997, International endodontic journal.

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

[28]  L. Wilcox.  Endodontic retreatment with halothane versus chloroform solvent. , 1995, Journal of endodontics.

[29]  L. Wilcox,et al.  Endodontic retreatment of Thermafil versus laterally condensed gutta-percha. , 1994, Journal of endodontics.

[30]  L. Wilcox.  Thermafil retreatment with and without chloroform solvent. , 1993, Journal of endodontics.

[31]  P. E. Lovdahl.  Endodontic retreatment. , 1992, Dental clinics of North America.

[32]  K. Kahnberg,et al.  Intraradicular bacteria and fungi in root-filled, asymptomatic human teeth with therapy-resistant periapical lesions: a long-term light and electron microscopic follow-up study. , 1990, Journal of endodontics.

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

[34]  G. Kaplowitz.  Evaluation of Gutta-percha solvents. , 1990, Journal of endodontics.

[35]  L. Wilcox.  Endodontic retreatment: ultrasonics and chloroform as the final step in reinstrumentation. , 1989, Journal of endodontics.

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

[37]  R. Block,et al.  Management of endodontic failures. , 1988, Oral surgery, oral medicine, and oral pathology.

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

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

[40]  S. W. Schneider,et al.  A comparison of canal preparations in straight and curved root canals. , 1971, Oral surgery, oral medicine, and oral pathology.

[41]  K. Thoma.  Introducing the staff of Oral Surgery, Oral Medicine, and Oral Pathology , 1948 .

[42]  of efficacy: , 2022 .