Comparative analysis of incidence of dentinal defect with different taper of rotary instrument use stereomicroscope


  • Ali mohammed khamas
  • Musab Hameed Saeed Department of Clinical Sciences, Ajman University, Ajman, UAE,
  • Biland MS Shukri 3Professor at College of Dentistry, Mustansiriyah University



Edge x7, F-ONE, dentinal defect, stereomicroscope



           Study the effect of canal preparation with different Niti rotary system (Edge x7 file and F-one file) with different taper (0.04 and 0.06) on the incidence of dentinal defect.

Methods and Material:

       75 straight palatal root  of maxillary first molar were collected, the instrumentation was done to 11 mm root length for all sample except control group, the sample were divided randomly into five group (n=15), Group (A) was a control, Group (B) with Edge x7 taper (0.04), Group (C) with Edge x7 taper (0.06), Group (D) with F-ONE taper (0.04), and Group (E) with  F-ONE taper (0.06)  Every sample had a horizontal section from the apex at  2 mm, 4.5 mm, and 7 mm, dentinal defect was evaluated with 25x stereomicroscope.

Statistical analysis used:

      The data were statistically evaluated at significance levels of 5% or more using Fisher's exact test.


     Ther is no significant difference between different taper and between different file, in general taper 0.04 showed less dentinal defect than taper 0.06, and Edge x7 showed less defect than F-ONE.


     Dentinal defects were present in all experimental groups, but not in control group.


Edge x7, AF Fanta, dentinal defect, stereomicroscope



Peters OA, de Azevedo Bahia MG, Pereira ES. Contemporary root canal preparation: Innovations in biomechanics. Dent Clin North Am .2017;61:37-58.

Haapasalo M, Endal U, Zandi H, Coil JM. Eradication of endodontic infection by instrumentation and irrigation solutions. Endod Topics 2005; 19:77-102

Shemesh H, van Soest G, Wu MK, Wesselink PR. Diagnosis of vertical root fractures with optical coherence tomography. J Endod 2008; 34:739-42

Versiani MA, Souza E, De-Deus G. Critical appraisal of studies on dentinal radicular microcracks in endodontics: Methodological issues, contemporary concepts, and future perspectives. Endod Topics 2015; 33:87-156

Bürklein S, Tsotsis P, Schäfer E. Incidence of dentinal defects after root canal preparation: Reciprocating versus rotary instrumentation. J Endod 2013; 39:501-4

Miguéns-Vila R, Martín-Biedma B, Varela-Patiño P, Ruíz-Piñón M, Castelo-Baz P. Vertical root fracture initiation in curved roots after root canal preparation: A dentinal micro-crack analysis with LED transillumination. J Clin Exp Dent 2017;9: e1218-23

Llena-Puy MC, Forner-Navarro L, Barbero-Navarro I. Vertical root fracture in endodontically treated teeth: A review of 25 cases. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2001; 92:553-5

Lee OYS, Khan K, Li KY, Shetty H, Abiad RS, Cheung GSP, et al. Influence of apical preparation size and irrigation technique on root canal debridement: A histological analysis of round and oval root canals. Int Endod J 2019; 52:1366-7

Adorno, C.G., Yoshioka, T., and Suda, H. Crack initiation on the apical root surface caused by three different nickel-titanium rotary files at different working lengths. J Endod. 2011; 37: 522–525

Yoldas O, Yilmaz S, Atakan G. Dentinal microcrack formation during root canal preparations by different NiTi rotary instruments and the self-adjusting file. Journal of Endodontics. 2012; 38:232–235

Gambarini G, Galli M, Seracchiani M, et al. In Vivo Evaluation of Operative Torque Generated by Two Nickel-Titanium Rotary Instruments during Root Canal Preparation. Eur J Dent.2019;13:556-62.

Di Nardo D, Miccoli G, Mazzoni A, Seracchiani M, Gambarini G, Testarelli L. Centering Ability of a New Nickel–Titanium Rotary Instruments with a Peculiar Flat-side Design: An In Vitro Study. J Contemp Dent Pract. 2020;21(1):539-42.

Liu R, Kaiwar A, Shemesh H, Wesselink PR, Hou B, Wu MK. Incidence of apical root cracks and apical dentinal detachments after canal preparation with hand and rotary files at different instrumentation lengths. J Endod. 2013: 39 (1): 129-132.

Karataş E, Gündüz HA, Kırıcı DÖ, Arslan H. Incidence of dentinal cracks after root canal preparation with ProTaper Gold, Profile Vortex, F360, Reciproc and ProTaper Universal instruments Int Endod J. 2015; 12541.

Fisher MA, Berzins DW, Bahcall JK. An in vitro comparison of bond strength of various obturation materials to root canal dentin using a push-out test design. J Endod. 2007; 33 (7): 856-858.

Uzunoglu E, Görduysus M, Görduysus Ö. A comparison of different irrigation systems and gravitational effect on final extrusion of the irrigant. J Clin Exp Dent. 2015; 7(2): e218-e223.

Hussien S,Al-Gharrawi HA. Incidence of Dentinal Root Defects Caused by RECIPROC Blue, ProTaper Gold, ProTaper NEXT and RECIPROC Nickel Titanium Rotary Instruments." The journal of contemporary dental practice. 2019;(3): 291-297.‏

Guinesi AS, Faria G, Tanomaru-Filho M, Bonetti-Filho I. Influence of Sealer Placement Technique on the Quality of Root Canal Filling by Lateral Compaction or Single Cone. Braz Dent J. 2014; 25(2): 117-122.

Capar ID, Ertas H, Ok E, Arslan H. Comparison of single cone obturation performance of different novel nickel-titanium rotary systems. Acta Odontologica Scandinavica. 2014c; 72: 537–542

Saieed N A, Al-Zaka IM. The Incidence of dentinal root defects caused by different Nickel Titanium instruments. MDJ. 2015;(12): 1–9.

Arias A, Lee YH, Peters CI, Gluskin AH, Peters OA. Comparison of 2 Canal Preparation Techniques in the Induction of Microcracks: A Pilot Study with Cadaver Mandibles. J Endod. 2014; 40 (7): 982-985.

Priya NT, Chandrasekhar V, Anita S, Tummala M, Raj TB, Badami V, Kumar P, Soujanya E. "Dentinal microcracks after root canal preparation" a comparative evaluation with hand, rotary and reciprocating instrumentation. J Clin Diagn Res. 2014; 8(12): Zc70–2.

Vertucci F J. Root canal morphology and its relationship to endodontic procedures. Endodontic Topics.2006;10(1): 3-29.

Kustarci A, Altunbas D, Akpinar KE. Comparative study of apically extruded debrisusing one manual and two rotary instrumentation techniques for endodontic. Journal of Dental Sciences.2012;7(1):1-6

Shadan S, Biland M.S. The Amount of Extruded Debris an In-vitro Comparative Study. Journal of oral and dental research. 2020; (2):1-3

Khdairah HR, Al-Gharrawi HA. The effect of canal preparation using 2shape, protaper gold and protaper next file systems on the fracture resistance of obturated roots. Journal of International Dental and Medical Research. 2020;13(1):42-5.

Sobh YT, Nour El Deen MA, Hashem AA. Effect of Different Contemporary Rotary Nickel Titanium Systems on Root Canal Geometry. ADJ-for Girls. 2021; 8: 527-534

Ozlek E, Gunduz H. The effect of heat-treated single-file systems on dentinal crack formation. Niger J Clin Pract. 2021; 24: 418-424.

Kim HC, Lee MH, Yum J, Versluis A, Lee CJ, Kim BM. Potential relationship between design of nickel-titanium rotary instruments and vertical root fracture. J Endod. 2010; 36 (7): 1195-1199.

Kaddoura R,Ahmad A, Al Tayyan M. Shaping ability of different single-file rotary systems in simulated S-shaped canals by a new investigation approach.Saudi Endodontic Journal.2021;11(2): 173-180.

Hamed SA, Shabayek S, Hassan HY. Biofilm elimination from infected root canals using four different single files. BMC Oral Health. 2022: 22, -660.

Martins J, Silva, E, Baruwa, A, PereiradaCosta R,Fernandes, F, Versiani M. Comparative analysis of reciprocating and flat-side heat-treated rotary single-file systems: Design, metallurgical characteristics, and mechanical performance. International Endodontic Journal.2023; (56):896-908.

Koch K, Brave D. Real world Endo: Design features of rotary files and how they affect clinical performance. Oral Health.2002;( 92):39-49.

AbdelWahed, A. Comparative assessment of apically extruded debris using Protaper Next, Hyflex CM and EdgeFile X7 nickel titanium instruments (An in vitro Study). Egyptian Dental Journal. 2021; 67(4): 3751-3757.

Bier S, Shemesh H, Tanomaru-Filho M, Wesselink R,Wu M. The ability of different nickel-titanium rotary instruments to induce dentinal damage during canal preparation. Journal of endodontics.2009;35(2):236-238

Gergi RM, Osta NE, Naaman AS. Dentinal crack formation during root canal preparations by the twisted file adaptive, Reciproc and WaveOne instruments. Eur J Dent. 2015; 9:508–512

Bhavik A, Pranjely S, Pratik S, Sheetal B, Dimple J, Arvind J.Oval Root Canals Prepared with Two Different Endodontic Rotary Files: An In Vitro Study Comparing the Incidence of Dental Defects.Cureus.2023: 10-7759.

Karataş, Ertuğrul, et al. "Incidence of dentinal cracks after root canal preparation with ProTaper Gold, Profile Vortex, F360, Reciproc and ProTaper Universal instruments." International endodontic journal 49.9 (2016): 905-910.

Nishad SV, Shivamurthy GB. Comparative analysis of apical root crack propagation after root canal preparation at different instrumentation lengths using ProTaper universal, ProTaper next and ProTaper gold rotary files: an in vitro study. Contemp Clin Dent. 2018; (9):830_17.

Chole D, Kamble S, Bakle S, Gandhi N, Hatte N, Bawa P. Effects of 3 Single-File System (Protaper Universal, Protaper Next, Protaper Gold) on crack formation in dentin after root canal preparation - an in vitro study. IOSR JDMS. 2019 ;1(8):47-50.




How to Cite

mohammed, A., Hameed Saeed, M. ., & MS Shukri, B. . (2024). Comparative analysis of incidence of dentinal defect with different taper of rotary instrument use stereomicroscope. Mustansiria Dental Journal, 20(1), 1–13.