Download PDF
CC BY-NC-ND 4.0 · Eur J Dent 2009; 03(02): 90-95
DOI: 10.1055/s-0039-1697413
Original Article
Dental Investigation Society

Comparison of the Different Techniques to Remove Fractured Endodontic Instruments from Root Canal Systems

Nimet Gencoglu
a   Professor, Marmara University, Faculty of Dentistry, Department of Endodontics, Istanbul, Turkey
,
Dilek Helvacioglu
b   Research Assistant, Marmara University, Faculty of Dentistry, Department of Endodontics, Istanbul, Turkey
› Author Affiliations
Further Information

Publication History

Publication Date:
03 October 2019 (online)

  PDF Download Permissions and Reprints

ABSTRACT

Objectives: To evaluate the success of certain methods that can be used in the removal of separated instruments from different levels in curved and straight canals.

Methods: Instrument removal attempts were undertaken on 63 straight and 30 curved canals containing a pre-fractured instrument using the ultrasonics under the visualization of an operating microscope or conventional methods. In straight canals, a Masseran Kit was additionally used to these techniques. The success of instrument removal in relation to the techniques used and the location of the fragments in the root canal were evaluated. Successful treatment was defined by the removal or complete by passing of the fragments.

Results: The overall success rate was found 93.3% with ultrasonics and 66.6% when only conventional methodswere used in curved canals. In straight canals, also the success rate was the highest with ultrasonics (95.2%). This was followed by conventional method (80.9%) and the least by Masserann Kit (47.6%). When the success rate was investigated according to the location of the broken instruments, the lowest rate was found in the apical third of root canal.

Conclusions: Location of the fragment and the shape of the root canal influence the success of fractured instrument management. Ultrasonics under the visualization of an operating microscope was found to be an effective removal method. (Eur J Dent 2009;3:90-95)

Key words:

Fractured instrument - Instrument removal - Operating microscope - Ultrasonics - Masserann Kit
 

  • REFERENCES

  • 1 Sjögren U, Hagglund B, Sundqvist G, Wing K. Factors affecting the long-term results of endodontic treatment. J Endod 1990; 16: 498-504
    CrossrefPubMedGoogle Scholar
  • 2 Sigueira JF. Aetiology of root canal treatment failure: why well-treated teeth can fail. Int Endod J 2001; 34: 1-10
    CrossrefPubMedGoogle Scholar
  • 3 Saunders JL, Eleazer PD, Zhang P, Michalek S. Effect of a separated instrument on bacterial penetration of obturated root canals. J Endod 2004; 30: 177-179
    CrossrefPubMedGoogle Scholar
  • 4 Nagai O, Tani N, Kayaba Y, Kodama S, Osada T. Ultrasonic removal of broken instruments in root canals. Int Endod J 1986; 19: 298-304
    CrossrefPubMedGoogle Scholar
  • 5 Suter B, Lussi A, Sequeira P. Probability of removing fractured instrument from root canals. Int Endod J 2005; 38: 112-123
    CrossrefPubMedGoogle Scholar
  • 6 Ruddle CJ. Micro-endodontic nonsurgical retreatment. Dent Clin North Am 1997; 41: 429-454
    PubMedGoogle Scholar
  • 7 Hulsmann M, Schinkel I. Influence of several factors on the success or failure of removal of fractured instruments from the root canal. Endod Dent Traumatol 1999; 15: 252-258
    CrossrefPubMedGoogle Scholar
  • 8 Hulsmann M. Removal of fractured instruments using a combined automated/ultrasonic technique. J Endod 1994; 20: 144-147
    CrossrefPubMedGoogle Scholar
  • 9 Gettlemann BH, Spriggs KA, ElDeeb ME, Messer HH. Removal of canal obstructions with the endo extractor. J Endod 1991; 17: 608-611
    CrossrefPubMedGoogle Scholar
  • 10 Suter B. A new method for retrieving silver points and separated instruments from root canals. J Endod 1998; 24: 446-448
    CrossrefPubMedGoogle Scholar
  • 11 Khayat BG. The use of magnification in endodontic therapy: the operating microscope. Pract Periodontics Aesthet Dent 1998; 10: 137-144
    PubMedGoogle Scholar
  • 12 Ward JR, Parashos P, Messer HH. Evaluation of an ultrasonic technique to remove fractured rotary nickel-titanium endodontic instruments from root canals: an experimental study. J Endod 2003; 29: 756-763
    CrossrefPubMedGoogle Scholar
  • 13 Ward JR, Parashos P, Messer HH. Evaluation of an ultrasonic technique to remove fractured rotary nickel-titanium endodontic instruments from root canals: Clinical cases. J Endod 2003; 29: 764-767
    CrossrefPubMedGoogle Scholar
  • 14 Masserann J. Removal of metallic fragments from the root canal. J Br Endod Soc 1971; 5: 55-59
    CrossrefPubMedGoogle Scholar
  • 15 Friedman S, Stabholtz A, Tamse A. Endodontic retreatment: case selection and technique Part 3. Retreatment techniques. J Endod 1990; 16: 543-549
    CrossrefPubMedGoogle Scholar
  • 16 Okiji T. Modified usage of the Masserann Kit for removing intracanal broken instruments. J Endod 2003; 29: 466-467
    CrossrefPubMedGoogle Scholar
  • 17 Ruddle CJ. Nonsurgical retreatment. In Cohen S, Burns RC. eds. Pathways of the pulp.. 8th ed. St. Louis: CVMosby Co; 2002: 875-929
    Google Scholar
  • 18 Ruddle C. Nonsurgical retreatment. J Endod 2004; 30: 827-845
    CrossrefPubMedGoogle Scholar
  • 19 Yoldas O, Oztunc H, Tinaz C, Alparslan N. Perforation risks associated with the use of Masserann endodontic kit drills in mandibular molars. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2004; 97: 513-517
    CrossrefPubMedGoogle Scholar
  • 20 YaShen Peng B, Cheung GS. Factors associated with the removal of fractured instruments from root canal systems. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2004; 98: 605-610
    CrossrefPubMedGoogle Scholar
  • 21 Souter NJ, Messer HH. Complications associated with fractured file removal using an ultrasonic technique. J Endod 2005; 31: 450-452
    CrossrefPubMedGoogle Scholar
  • 22 Fors UGH, Berg JO. Endodontic treatment of root canals obstructed by foreign objects. Int Endod J 1986; 19: 2-10
    CrossrefPubMedGoogle Scholar