APICAL SEALING EFFICIENCY OF DIFFERENT OBTURATION TECHNIQUES OVER APICALLY BROKEN ROTARY NICKEL-TITANIUM FILES (AN IN VITRO STUDY)

1- Gambarini G. Cyclic fatigue of ProFile rotary instruments after prolonged clinical use. Int Endod J 2001; 34: 386-9.
2- 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: 40-3.
3- Ankrum MT, Hartwell GR, Truitt JE. K3 Endo, ProTaper, and ProFile systems: breakage and distortion in severely curved roots of molars. J Endod 2004; 30: 234-7.
4- Pruett JP, Clement DJ, Carnes DL Jr. Cyclic fatigue testing of nickel-titanium endodontic instruments. J Endod 1997; 23: 77-85.
5- Arens FC, Hoen MM, Steiman HR, Dietz GC Jr. Evaluation of single-use rotary nickel-titanium instruments. J Endod 2003; 29: 664-6.
6- Sattapan B, Palamara J E A, Messer H H. Torque during canal instrumentation using rotary nickel-titanium files. J Endod 2000; 26: 156–60.
7- Spili P, Parashos P, Messer HH. The impact of instrument fracture on outcome of endodontic treatment. J Endod 2005; 31: 845-50.
8- Saunders JL, Eleazer PD, Zhang P, Michalek S. Effect of a separated instrument on bacterial penetration of obturated root canals. J Endod 2004; 30: 177-9.
9- Taneja S, Chadha R, Gupta R, Gupta A. Comparative evaluation of sealing properties of different obturation systems placed over apically fractured rotary NiTi files. J Conserv Dent 2012; 15: 36-40.

10- Hussein AN, Zaazou A. Sealing ability of different obturation systems applied over apically separated rotary nickel-titanium files. CDJ 2008; 24: 205-9.

11- Parashos P, Messer HH. Rotary NiTi instrument fracture and its consequences. J Endod 2006; 32: 1031-43.
12- Peters OA, Barbakow F. Dynamic torque and apical
forces of ProFile. 04 rotary instruments during preparation of curved canals. Int Endod J 2002; 35: 379-89.
13- Young JM, Van Vliet KJ. Predicting in vivo failure of pseudoelastic NiTi devices under low cycle, high amplitude fatigue. J Biomed Mater Res B Appl Biomater 2005; 72: 17-26.
14- Sattapan B, Nervo GJ, Palamara JE, Messer HH. Defects in rotary nickel-titanium files after clinical use. J Endod 2000; 26: 161-5.
15- Gambarini G. Cyclic fatigue of nickel-titanium rotary instruments after clinical use with low- and high-torque endodontic motors. J Endod 2001; 27: 772-4.
16- Yared GM, Bou Dagher FE, Machtou P. Cyclic fatigue of Profile rotary instruments after simulated clinical use. Int Endod J 1999; 32: 115-9.
17- Yared GM, Bou Dagher FE, Machtou P. Cyclic fatigue of Profile rotary instruments after clinical use. Int Endod J 2000; 33: 204-7.
18- McGuigan MB, Louca C, Duncan H F. Endodontic instrument fracture: causes and prevention. BDJ; 2013; 214: 341-8.
19- Alazrag M. The Effect of Fractured Instruments on the Prognosis of Endodontic Treatment. Health & Medicine, 2015. Available at: http://www.slideshare.net/mohammedalazrak9/prognos is-of-fractured-instrument-47537712
20-Simon S, Machtou P, Tomson P, Adams N Lumley P. Influence of Fractured Instruments on the Success Rate of Endodontic Treatment. Endodontics 2008; 35: 172-9.
21- Boutsioukis C, Gogos C, Verhaagen B, Versluis M, Kastrinakis E, Van der Sluis LW. The effect of apical preparation size on irrigant flow in root canals evaluated using an unsteady Computational Fluid Dynamics model. Int Endod J 2010; 43: 874-8.
22- Baratto-Filho F, Leonardi DP, Zielak JC, Vanni JR, Sayão-Maia SM, Sousa-Neto MD. Influence of ProTaper finishing files and sodium hypochlorite on cleaning and shaping of mandibuldar central incisors - a histological analysis. J Appl Oral Sci 2009; 17: 229-33.
23- Madarati AA, Qualtrough AJ, Watts DC. Effect of retained fractured instruments on tooth resistance to vertical fracture with or without attempt at removal. Int Endod J 2010; 43: 1047-53.
24- Altundasar E, Sabin C, Ozcelik B, Cehreli ZC. Sealing properties of different obturation systems applied over apically fractured rotary nickel-titanium files. J Endod 2008; 34: 194
25- MorenoGVA,ArgüelloRG,PérezTHE.Assessmentof apical sealing of three warm obturation techniques in the presence of fractured NiTi rotary instruments. Rev Odont Mex 2013; 17: 20-5.
26- Weller RN, Kimbrough WF, Anderson RW. A comparison of the thermoplastic obturation techniques:

Adaption to the canal walls. J Endod 1997; 23: 703-6.
27- Weis MV, Parashos P, Messer HH. Effect of obturation technique on sealer cement thickness and dentinal tubule penetration. Int Endod J 2004; 37: 653-63.
28-Gulsahi K, Cehreli ZC, Kuraner T, Dagli FT. Sealer area associated with cold lateral condensation of gutta- percha and warm coated carrier filling systems in canals prepared with various rotary NiTi systems. Int Endod J
2007; 40: 275-81.
29- Sevimay S, Kalayci A. Evaluation of apical sealing
ability and adaptation to dentine of two resin based
sealer. J Oral Rehabil 2005; 32: 105-10.
30- Camps J, Pashley D. Reliability of the dye penetration
studies. J Endod 2003; 29: 592-4.
31- Pathomvanich S, Edmunds DH. The sealing ability of
Thermafil obturators assessed by four different
microleakage techniques. Int Endod J 1996; 29: 327-34. 32- Ahlberg KM, Assavanop P, Tay WM. A comparison of the apical dye penetration patterns shown by methylene blue and india ink in root-filled teeth. Int Endod J 1995;
28: 30-4.
33- Verissimo DM, do Vale MS. Methodologies for
assessment of apical and coronal leakage of endodontic filling materials: a critical review. J Oral Sci 2006; 48: 93-8.
34- Mohammadi Z, Khademi AA. Effect of a separated rotary instrument on bacterial penetration of obturated root canals. J Clin Dent 2006; 17: 131-3.
35- Hegde J, Bashetty K, Kumar K, Chikkamallaiah C. Comparative evaluation of the sealing ability of different obturation systems used over apically separated rotary nickel-titanium files: An in vitro study. J Conserv Dent 2013; 16: 408-12.