Modern considerations when approaching fractured endodontic instruments - Part 2: A review of the literature and clinical techniques
Once root canal treatment is considered, the treating clinicians must be aware of the real possibility that complications and unforeseen accidents can occur during any stage of the treatment. Complications and accidents may include instrument separation, root perforation on different levels and ledge formation.
2. Sjögren U, Hägglund B, Sundqvist G, Wing K. Factors affecting the long-term results of endodontic treatment. J Endod. 1990; 16(10): 498-504.
3. Siqueira Jr JF. Aetiology of root canal treatment failure: why well-treated teeth can fail. Int. Endod. J. 2001; 34(1): 1-10.
4. McGuigan M, Louca C, Duncan H. Clinical decision-making after endodontic instrument fracture. Br. Dent. J. 2013; 214(8): 395.
5. Grossman LI. Guidelines for the prevention of fracture of root canal instruments. Oral Surg,, Oral Med, Oral Pathol, Oral Radiol. 1969; 28(5): 746-52.
6. Parashos P, Gordon I, Messer HH. Factors influencing defects of rotary nickel-titanium endodontic instruments after clinical use. J Endod. 2004; 30(10): 722-5.
7. Suter B, Lussi A, Sequeira P. Probability of removing fractured instruments from root canals. Int. Endod. J. 2005; 38(2): 112-23.
8. McLeod N, Davies B, Brennan P. Bisphosphonate osteonecrosis of the jaws: an increasing problem for the dental practitioner. Br Dent J. 2007; 203(11): 641.
9. Saunders JL, Eleazer PD, Zhang P, Michalek S. Effect of a separated instrument on bacterial penetration of obturated root canals. J Endod. 2004; 30(3): 177-9.
10. De Chevigny C, Dao TT, Basrani BR, et al. Treatment outcome in endodontics: the Toronto study - phase 4: initial treatment. J Endod. 2008; 34(3): 258-63.
11. Parashos P, Messer HH. Rotary NiTi instrument fracture and its consequences. J Endod. 2006; 32(11): 1031-43.
12. Torabinejad M, Lemon RR. Procedural accidents. Principles and practice of endodontics. 2002; 2: 306-23.
13. Frota LMA, Aguiar BA, Aragäo MGB, De Vasconcelos BC. Removal of separated endodontic K-File with the aid of hypodermic needle and cyanoacrylate. Case reports in Dentistry. 2016.
14. Hülsmann M. Removal of fractured instruments using a combined automated/ultrasonic technique. J. Endod. 1994; 20(3): 144-6.
15. Gencoglu N, Helvacioglu D. Comparison of the different techniques to remove fractured endodontic instruments from root canal systems. Eur J Dent. 2009; 3(02): 90-5.
16. Shiyakov KK, Vasileva RI. Success for removing or bypassing instruments fractured beyond the root canal curve - 45 clinical cases. JIMAB - Annual Proceedings Scientific Papers. 2014; 20(3): 567-71.
17. Nevares G, Cunha RS, Zuolo ML, Da Silveira Bueno CE. Success rates for removing or bypassing fractured instruments: a prospective clinical study. J Endod. 2012; 38(4): 442-4.
18. Iqbal MK. Nonsurgical ultrasonic endodontic instruments. Dental Clinics. 2004; 48(1): 19-34.
19. Cohen S, Burns R. Pathways of the pulp, 8th edn. St Louis, MO: Mosby; 2002.
20. Ruddle CJ. Nonsurgical retreatment. J. Endod. 2004; 30(12): 827-45.
21. 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(11): 756-63.
22. Ruddle CJ. Broken instrument removal: the endodontic challenge. Dent Today. 2002; 21(7): 70-81.
23. Nagai O, Tani N, Kayaba Y, Kodama S, Osada T. Ultrasonic removal of broken instruments in root canals. Int Endod J. 1986; 19(6): 298-304.
24. Cujé J, Bargholz C, Hülsmann M. The outcome of retained instrument removal in a specialist practice. Int Endod J. 2010; 43(7): 545-54.
25. Fu M, Zhang Z, Hou B. Removal of broken files from root canals by using ultrasonic techniques combined with dental microscope: a retrospective analysis of treatment outcome. J Endod. 2011; 37(5): 619-22.
26. 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(11): 764-7.
27. Hülsmann M, Schinkel I. Influence of several factors on the success or failure of removal of fractured instruments from the root canal. Dent. Traumatol. 1999; 15(6): 252-8.
28. Ruddle C. Nonsurgical endodontic retreatment. In Cohen S, Burns RC editors: Pathways of the pulp, Mosby, St. Louis MO. 2002; 875-929.
29. Shen Y, Peng B, Cheung GS-p. Factors associated with the removal of fractured NiTi instruments from root canal systems. Oral Surg, Oral Med, Oral Pathol, Oral Radiol, Endod. 2004; 98(5): 605-10.
30. Dominici JT, Clark S, Scheetz J, Eleazer PD. Analysis of heat generation using ultrasonic vibration for post removal. J Endod. 2005; 31(4): 301-3.
31. Gluskin AH, Ruddle CJ, Zinman EJ. Thermal injury through intraradicular heat transfer using ultrasonic devices: precautions and practical preventive strategies. J Am Dent Assoc. 2005; 136(9): 1286-93.
32. Hashem AAR. Ultrasonic vibration: temperature rise on external root surface during broken instrument removal. J Endod. 2007; 33(9): 1070-3.
33. Sweatman TL, Baumgartner JC, Sakaguchi RL. Radicular temperatures associated with thermoplasticized gutta-percha. J Endod. 2001; 27(8): 512-5.
34. Souter NJ, Messer HH. Complications associated with fractured file removal using an ultrasonic technique. J Endod. 2005; 31(6): 450-2.
35. Marsicovetere ES, Clement DJ, Carlos E. Morphometric video analysis of the engine-driven nickel-titanium Lightspeed instrument system. J Endod. 1996; 22(5): 231-5.
36. Madarati AA, Qualtrough AJ, Watts DC. Efficiency of a newly designed ultrasonic unit and tips in reducing temperature rise on root surface during the removal of fractured files. J Endod. 2009; 35(6): 896-9.
37. Terauchi Y. Separated file removal. Dent. Today. 2012; 31(5): 108-10.
38. Buchanan, LS. Removing separated files with the Terauchi file retreival kit. Roots. 2016; 1: 20-3.
39. Terauchi Y, O'Leary L, Kikuchi I, et al. Evaluation of the efficiency of a new file removal system in comparison with two conventional systems. J Endod. 2007; 33(5): 585-8.
40. Alapati SB, Brantley WA, Svec TA, Powers JM, Nusstein JM, Daehn GS. SEM observations of nickel-titanium rotary endodontic instruments that fractured during clinical use. J Endod. 2005; 31(1): 40-3.
41. Alomairy KH. Evaluating two techniques on removal of fractured rotary nickel-titanium endodontic instruments from root canals: an in vitro study. J Endod. 2009; 35(4): 559-62.
42. Wilcox LR, Roskelley C, Sutton T. The relationship of root canal enlargement to finger-spreader induced vertical root fracture. J Endod. 1997; 23(8): 533-4.
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