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VOLUME 5 , ISSUE 2 ( July-December, 2020 ) > List of Articles


Preparation Ability of ProTaper Next and XP-endo Shaper Instruments in Isthmus-containing Root Canal System

Mustafa Sarıkahya, Tayfun Alaçam

Keywords : Isthmus cleaning, M-wire, and Max-wire, NiTi instruments, Rotary instruments, Shaping ability

Citation Information : Sarıkahya M, Alaçam T. Preparation Ability of ProTaper Next and XP-endo Shaper Instruments in Isthmus-containing Root Canal System. Cons Dent Endod J 2020; 5 (2):28-35.

DOI: 10.5005/jp-journals-10048-0065

License: CC BY-NC 4.0

Published Online: 04-03-2021

Copyright Statement:  Copyright © 2020; Jaypee Brothers Medical Publishers (P) Ltd.


Aim and objective: This research compares the abilities of the preparation of ProTaper Next (PTN; Dentsply-Maillefer) and XP-endo Shaper (XPS; FKG, Switzerland) files in mesial canals of lower molars with separate binary canals and one foramen with isthmus connection using µCT imaging. Materials and methods: The comparison showed 20 roots matched according to the similarities in preoperative canal volume, specimen length, and root curvature using preoperative scans, and then they were indiscriminately separated into two groups and prepared either with PTN or XPS instruments. After chemomechanical preparation, the roots were resubmitted to postoperative scans. Results: There was no variance in instrument systems for the volume of removed dentine, surface area as well as the amount of accumulated debris in the isthmus region (p >0.05). Change in canal surface area and amount of accumulated hard tissue debris (AHTD) was more in the PTN group for total root canal space (p <0.05). PTN instruments increased surface area in a shorter period. Conclusion: Both instrument systems with different design and metallurgic properties had reached the desired volume in different periods; however, neither technique was able to fully prepare the isthmus-containing mesial roots of lower molars.

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  1. Siqueira JF, Araújo MC, Garcia PF, et al. Histological evaluation of the effectiveness of five instrumentation techniques for cleaning the apical third of root canals. J Endod 1997;23(8):499–502. DOI: 10.1016/S0099-2399(97)80309-3.
  2. Susin L, Liu Y, Yoon JC, et al. Canal and isthmus debridement efficacies of two irrigant agitation techniques in a closed system. Int Endod J 2010;43(12):1077–1090. DOI: 10.1111/j.1365-2591.2010.01778.x.
  3. Bergenholtz G, Spångberg L. Controversıes in endodontıcs. Crit Rev Oral Biol Med 2004;15(2):99–114. DOI: 10.1177/154411130401500204.
  4. Pereira ESJ, Gomes RO, Leroy AMF, et al. Mechanical behavior of M-Wire and conventional NiTi wire used to manufacture rotary endodontic instruments. Dent Mater 2013;29(12):e318–e324. DOI: 10.1016/
  5. Elnaghy AM. Cyclic fatigue resistance of ProTaper Next nickel-titanium rotary files. Int Endod J 2014;47(11):1034–1039. DOI: 10.1111/iej.12244.
  6. Zhao D, Shen Y, Peng B, et al. Root canal preparation of mandibular molars with 3 nickel-titanium rotary instruments: a micro-computed tomographic study. J Endod 2014;40(11):1860–1864. DOI: 10.1016/j.joen.2014.06.023.
  7. Bürklein S, Benten S, Schäfer E. Quantitative evaluation of apically extruded debris with different single-file systems: Reciproc, F360, and OneShape versus Mtwo. Int Endod J 2014;47(5):405–409. DOI: 10.1111/iej.12161.
  8. Bürklein S, Mathey D, Schäfer E. Shaping ability of ProTaper NEXT and BT-RaCe nickel-titanium instruments in severely curved root canals. Int Endod J 2015;48(8):774–781. DOI: 10.1111/iej.12375.
  9. Pasqualini D, Alovisi M, Cemenasco A, et al. Micro-computed tomography evaluation of ProTaper next and biorace shaping outcomes in maxillary first molar curved canals. J Endod 2015;41(10):1706–1710. DOI: 10.1016/j.joen.2015.07.002.
  10. Lopes RMV, Marins FC, Belladonna FG, et al. Untouched canal areas and debris accumulation after root canal preparation with rotary and adaptive systems. Austr Endod J 2018;44(3):260–266. DOI: 10.1111/aej.12237.
  11. Linden D, Boone M, De Bruyne M, et al. Adjunctive steps for the removal of hard tissue debris from the anatomic complexities of the mesial root canal system of mandibular molars: a micro-computed tomographic study. J Endod 2020;46(10):1508–1514. DOI: 10.1016/j.joen.2020.05.009.
  12. Stringheta CP, Bueno CES, Kato AS, et al. Micro-computed tomographic evaluation of the shaping ability of four instrumentation systems in curved root canals. Int Endod J 2019;52(6):908–916. DOI: 10.1111/iej.13084.
  13. Silva EJNL, Vieira VTL, Belladonna FG, et al. Cyclic and Torsional Fatigue Resistance of XP-endo Shaper and TRUShape Instruments. J Endod 2018;44(1):168–172. DOI: 10.1016/j.joen.2017.08.033.
  14. Azim AA, Piasecki L, da Silva Neto UX, et al. XP shaper, a novel adaptive core rotary ınstrument: micro-computed tomographic analysis of ıts shaping abilities. J Endod 2017;43(9):1532–1538. DOI: 10.1016/j.joen.2017.04.022.
  15. Živković S, Nešković J, Jovanović-Medojević M, et al. The efficacy of XP-endo SHAPER (XPS) in cleaning the apical third of the root canal. Serbian Dent J 2017;64(4):171–178. DOI: 10.1515/sdj-2017-0016.
  16. Elnaghy AM, Mandorah A, Elsaka SE. Effectiveness of XP-endo Finisher, EndoActivator, and File agitation on debris and smear layer removal in curved root canals: a comparative study. Odontology 2017;105(2):178–183. DOI: 10.1007/s10266-016-0251-8.
  17. Zhao Y, Fan W, Xu T, et al. Evaluation of several instrumentation techniques and irrigation methods on the percentage of untouched canal wall and accumulated dentine debris in C-shaped canals. Int Endod J 2019;52(9):1354–1365. DOI: 10.1111/iej.13119.
  18. Leoni GB, Versiani MA, Silva-Sousa YT, et al. Ex vivo evaluation of four final irrigation protocols on the removal of hard-tissue debris from the mesial root canal system of mandibular first molars. Int Endod J 2017;50(4):398–406. DOI: 10.1111/iej.12630.
  19. Jayakumaar A, Ganesh A, Kalaiselvam R, et al. Evaluation of debris and smear layer removal with XP-endo finisher: a scanning electron microscopic study. Indian J Dent Res 2019;30(3):420–423. DOI: 10.4103/ijdr.IJDR_655_17.
  20. Alakshar A, Saleh ARM, Gorduysus MO. Debris and smear layer removal from oval root canals comparing XP-Endo Finisher, EndoActivator, and manual irrigation: a SEM evaluation. Eur J Dent 2020;14(4):626–633. DOI: 10.1055/s-0040-1714762.
  21. Alves FRF, Andrade-Junior CV, Marcelino-Alves MF, et al. Adjunctive steps for disinfection of the mandibular molar root canal system: a correlative bacteriologic, micro-computed tomography, and cryopulverization approach. J Endod 2016;42(11):1667–1672. DOI: 10.1016/j.joen.2016.08.003.
  22. Azim AA, Aksel H, Zhuang T, et al. Efficacy of 4 irrigation protocols in killing bacteria colonized in dentinal tubules examined by a novel confocal laser scanning microscope analysis. J Endod 2016;42(6):928–934. DOI: 10.1016/j.joen.2016.03.009.
  23. Silva EJNL, Belladonna FG, Zuolo AS, et al. Effectiveness of XP-endo Finisher and XP-endo Finisher R in removing root filling remnants: a micro-CT study. Int Endod J 2018;51(1):86–91. DOI: 10.1111/iej. 12788.
  24. Wigler R, Dvir R, Weisman A, et al. Efficacy of XP-endo finisher files in the removal of calcium hydroxide paste from artificial standardized grooves in the apical third of oval root canals. Int Endod J 2017;50(7):700–705. DOI: 10.1111/iej.12668.
  25. Vertucci FJ. Root canal anatomy of the human permanent teeth. Oral Surg Oral Med Oral Pathol 1984;58(5):589–599. DOI: 10.1016/0030-4220(84)90085-9.
  26. Schneider SW. A comparison of canal preparations in straight and curved root canals. Oral Surg Oral Med Oral Pathol 1971;32(2):271–275. DOI: 10.1016/0030-4220(71)90230-1.
  27. Paqué F, Laib A, Gautschi H, et al. Hard tissue debris accumulation analysis by high-resolution computed tomography scans. J Endod 2009;35(7):1044–1047. DOI: 10.1016/j.joen.2009.04.026.
  28. Robinson JP, Lumley PJ, Claridge E, et al. An analytical Micro CT methodology for quantifying inorganic dentine debris following internal tooth preparation. J Dent 2012;40(11):999–1005. DOI: 10.1016/j.jdent.2012.08.007.
  29. De-Deus G, Marins J, Neves A de A, et al. Assessing accumulated hard-tissue debris using micro-computed tomography and free software for image processing and analysis. J Endod 2014;40(2):271–276. DOI: 10.1016/j.joen.2013.07.025.
  30. Versiani MA, Alves FRF, Andrade-Junior CV, et al. Micro-CT evaluation of the efficacy of hard-tissue removal from the root canal and isthmus area by positive and negative pressure irrigation systems. Int Endod J 2016;49(11):1079–87. DOI: 10.1111/iej.12559.
  31. Rubin LM, Skobe Z, Krakow AA, et al. The effect of instrumentation and flushing of freshly extracted teeth in endodontic therapy: a scanning electron microscope study. J Endod 1979;5(11):328–335. DOI: 10.1016/S0099-2399(79)80088-6.
  32. de Oliveira MAVC, Venâncio JF, Pereira AG, et al. Critical instrumentation area: influence of root canal anatomy on the endodontic preparation. Braz Dent J 2014;25(3):232–236.
  33. FKG Dentaire SA. XP-Endo shaper: the one to shape your success; n.d. Available at: [Accessed July 7, 2017].
  34. Zehnder M. Root canal irrigants. J Endod 2006;32(5):389–98. DOI: 10.1016/j.joen.2005.09.014.
  35. Carvalho AS, Camargo CHR, Valera MC, et al. Smear layer removal by auxiliary chemical substances in biomechanical preparation: a scanning electron microscope study. J Endod 2008;34(11):1396–1400. DOI: 10.1016/j.joen.2008.08.012.
  36. Gu L, Wei X, Ling J, et al. A microcomputed tomographic study of canal isthmuses in the mesial root of mandibular first molars in a Chinese population. J Endod 2009;35(3):353–356. DOI: 10.1016/j.joen.2008.11.029.
  37. Keleş A, Alçin H, Sousa-Neto MD, et al. Supplementary steps for removing hard tissue debris from ısthmus-containing canal systems. J Endod 2016;42(11):1677–1682. DOI: 10.1016/j.joen.2016.07.025.
  38. Yang Q, Liu MW, Zhu LX, et al. Micro-CT study on the removal of accumulated hard-tissue debris from the root canal system of mandibular molars when using a novel laser-activated irrigation approach. Int Endod J 2020;53(4):529–538. DOI: 10.1111/iej.13250.
  39. Uzunoglu-Özyürek E, Karaaslan H, Türker SA, et al. Influence of size and insertion depth of irrigation needle on debris extrusion and sealer penetration. Restor Dent Endod 2017;43(1):1e2. DOI: 10.5395/rde.2018.43.e2.
  40. Weiger R, ElAyouti A, Löst C. Efficiency of hand and rotary instruments in shaping oval root canals. J Endod 2002;28(8):580–583. DOI: 10.1097/00004770-200208000-00004.
  41. Paqué F, Balmer M, Attin T, et al. Preparation of oval-shaped root canals in mandibular molars using nickel-titanium rotary instruments: a micro-computed tomography study. J Endod 2010;36(4):703–707. DOI: 10.1016/j.joen.2009.12.020.
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