1- American Association of Endodontics. Endodotics: Colleagues for excellence - Cracking the cracked tooth code. Chicago, IL: American Association of Endodontics; 1997.
2- Ingle JI, Bakland LK, Baumgartner JC. Ingles endodontics. 6thed. London: BC Decker; 2008.p. 676-80 3- Sathorn C, Palamara JE, Messer HH. A comparison of the effects of two canal preparation techniques on root fracture susceptibility and fracture pattern J Endod 2005; 31(4): 283-7
4- Allison DA, Weber CR, Walton RE. The influence of the method of canal preparation on the quality of apical and coronal obturation. J Endod 1979; 5(10): 298-304.
5- Bryant ST, Thompson SA, al-Omari MA, Dummer PM. Shaping ability of Profile rotary nickel-titanium instruments with ISO sized tips in simulated root canals: Part 1. Int Endod J 1998; 31(4): 275-81.
6- Loizides AL, Kakavetsos VD, Tzanetakis GN, Kontakiotis EG, Eliades G. A comparative study of the effects of two nickel-titanium preparation techniques on root canal geometry assessed by microcomputed tomography. J Endod 2007; 33(12): 1455-9. [OpenAIRE]
7- Yoldas O, Yilmaz S, Atakan G, Kuden C, Kasan Z. Dentinal microcrack formation during root canal preparations by different NiTi rotary instruments and the self-adjusting file. J Endod 2012; 38(2): 232-5 8- Bier CA, Shemesh H, Tanomaru-Filho M, Wesselink PR, Wu MK. The ability of different nickel-titanium rotary instruments to induce dentinal damage during canal preparation. J Endod 2009; 35(2): 236-8. [OpenAIRE]
9- Kim HC, Lee MH, Yum J, Versluis A, Lee CJ, Kim BM. Potential relationship between design of nickeltitanium rotary instruments and vertical root fracture. J Endod 2010; 36(7): 1195-9.
10- Zare Jahromi M, Mirzakouchaki P, Mousavi E, Navabi AA. Fracture strength of mesiobuccal roots following canal preparation with hand and rotary instrumentation: an in vitro study. Iran Endod J 2011; 6(3): 125-8.
11- Milani AS, Froughreyhani M, Rahimi S, Jafarabadi MA, Paksefat S. The effect of root canal preparation on the development of dentin cracks. Iran Endod J 2012; 7(4): 177-82.
12- Peters OA, Peters CI, Schönenberger K, Barbakow F. ProTaper rotary root canal preparation: assessment of torque and force in relation to canal anatomy. Int Endod J 2003; 36(2): 93-9.
13- Hargreaves KM, Cohen S, Berman LH. Pathways of the pulp. 10th ed. Mosby: Missouri; 2010.
14- Gluskin AH, Brown DC, Buchanan LS. A reconstructed computerized tomographic comparison of Ni-Ti rotary GT files versus traditional instruments in canals shaped by novice operators. Int Endod J 2001; 34(6): 476-84.
15- Sattapan B, Palamara JE, Messer HH. Torque during canal instrumentation using rotary nickel-titanium files. J Endod 2000; 26(3): 156-60.
16- Blum JY, Cohen A, Machtou P, Micallef JP. Analysis of forces developed during mechanical preparation of extracted teeth using Profile Ni-Ti rotary instruments. Int Endod J 1999; 32(1): 24-31.
17- Blum JY, Machtou P, Ruddle C, Micallef JP. Analysis of mechanical preparations in extracted teeth using ProTaper rotary instruments: value of the safety quotient. J Endod 2003; 29(9): 567-75.