Comparison of the Accuracy of Three Apex Locators, Raypex5, Dentaport ZX, and Novapex, with Radiography in Determining the Length of the Mesiobuccal Canal of Mandibular First Permanent Molars: An in Vitro Study

Document Type : مقاله‌های پژوهشی

Authors
Robab Farhang 1
Abbas Naghizadeh 2
Farnaz Farhang 3
1 Assistant Professor, Department of Endodontics, School of Dentistry, Ardabil University of Medical Sciences, Ardabil, Iran
2 Associate Professor, Department of Physical Education and Sport Sciences, School of Educational Sciences & Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
3 General Dentist, School of Dentistry, Ardabil University of Medical Sciences, Ardabil, Iran
10.22122/jids.v21.i1.0020
Abstract
Introduction: The aim of this study was to compare the Accuracy of three types of apex locators Novapex, Dentaport ZX and Raypex5 with radiography in determining the mesiobuccal canal length of the first mandibular permanent molar.
Materials & Methods: In this in vitro study, 72 extracted permanent mandibular first molar teeth with canal curvatures in the range of 20-30 degrees were selected. After disinfecting the teeth with 10% formalin solution, the teeth were stored in 0.5% chloramine T solution. An appropriate access cavity was prepared and pulp tissue was removed using a Barbed Broach. The actual canal length of each root was determined using a 15 K-file with a stapler. The root canal length obtained by Novapex, Dentaport ZX and Raypex5 apex locators was compared with radiography and the difference obtained from the above lengths was analyzed using Anova and T-Test at an error level of less than 0.05.
Results: The results showed that there was a significant difference between the mean canal length of the mandibular first molars in the apex locators of Raypex5, Novapex and Dentaport ZX with periapical radiography (P = 0.001). However, there was no significant difference between the mean canal length of mandibular first molar teeth in Raypex5, Novapex and Dentaport ZX apex locators with the actual canal length (P > 0.05).
Conclusion: There is no significant difference between the canal length measurements obtained by the different apex locators within the range of ± 0.5 mm at the apical foramen.
Keywords
Root canal preparation
Tooth apex
Radiography
  1. Hargreaves KM, Berman LH. Cohen's pathways of the pulp expert consult: Elsevier Health Sciences; 2015. P: 219-21.
  2. Rotstein I, Ingle JI. Ingle's Endodontics: PMPH USA; 2019. P. 102-4.
  3. Ebrahim A, Wadachi R, Suda H. Ex vivo evaluation of the ability of four different electronic apex locators to determine the working length in teeth with various foramen diameters. Aust Dent J 2006; 51(3): 258-62.
  4. Santhosh L, Raiththa P, Aswathanarayana S, Panchajanya S, Reddy JT, Susheela SR. Influence of root canal curvature on the accuracy of an electronic apex locator: An in vitro study. J Conserv Dent 2014; 17(6): 583-6.
  5. Saatchi M, Iravani S, Khaleghi MA, Mortaheb A. Influence of root canal curvature on the accuracy of root ZX electronic foramen locator: An in vitro study. Iran Endod J 2017; 12(2): 173-8.
  6. Mull JP, Manjunath V, Manjunath M. Comparison of accuracy of two electronic apex locators in the presence of various irrigants: An in vitro study. J Conserv Dent 2012; 15(2): 178-82.
  7. Ibarrola JL, Chapman BL, Howard JH, Knowles KI, Ludlow MO. Effect of preflaring on Root ZX apex locators. J Endod 1999; 25(9): 625-6.
  8. Sadeghi S, Abolghasemi M. A comparison between the Raypex5 apex locator and conventional radiography for determining working length of straight and curved canals. Iran Endod J 2007; 2(3): 101-4.
  9. Ravanshad S, Adl A, Anvar J. Effect of working length measurement by electronic apex locator or radiography on the adequacy of final working length: a randomized clinical trial. J Endod 2010; 36(11): 1753-6.
  10. Vieyra JP, Acosta J. Comparison of working length determination with radiographs and four electronic apex locators. Int Endod J 2011; 44(6): 510-8.
  11. Jaiswal P. Comparative evaluation of two electronic apex locators in determining working length. Int J Appl Dent Sci 2018; 4(3): 151-57.
  12. Green D. Stereomicroscopic study of 700 root apices of maxillary and mandibular posterior teeth. Oral Surg Oral Med Oral Pathol 1960; 13(1): 728-33.
  13. Bahrololoomi Z, Soleymani AA, Modaresi J, Imanian M, Lotfian M. Accuracy of an electronic apex locator for working length determination in primary anterior teeth. J Dent (Tehran) 2015; 12(4): 243-8.
  14. Mosharafian S, Mollaie N, Shoul MA, Shahrabi MS. In vitro comparison of, accuracy of raypex 5 and root zxii apex locators, for working length determination in primary teeth. J Evol Med Dent Sci 2020; 9(20): 1594-9.
  15. Vanitha S, Sherwood IA. Comparison of three different apex locators in determining the working length of mandibular first molar teeth with irreversible pulpitis compared with an intraoral periapical radiograph: A block randomized, controlled, clinical trial. J Investig Clin Dent 2019; 10(3): e12408.
  16. Nahidi Z, Izadi A, Naeimi S, Rezai R. Evaluation of the accuracy of three different electronic apex locators by histologic sectioning as the gold standard [in Persian]. J Isfahan Dent Sch 2019; 15(2): 218-25.
  17. Shahi S, Rahimi S, Milani AS, Jafarabadi MA, Naghsh GRD. Comparison between the accuracy of NovApex apex locator and radiographs in determining radiographic apex. Iran Endod J 2011; 6(2): 65-8.
  18. Lekshmy DS, Deepthi P, Ganesh C, Chacko G, Abhilash A, Satheesh S. A comparative clinical study on the correlation of working length determined using three different electronic apex locators with radiographic working length: An in vivo study. Endodontology 2016; 28(1): 18-22.
  19. Orosco FA, Bernardineli N, Garcia RB, Bramante CM, Duarte MAH, Moraes IGd. In vivo accuracy of conventional and digital radiographic methods in confirming root canal working length determination by Root ZX. J Appl Oral Sci 2012; 20(5): 522-5.
  20. Real DG, Davidowicz H, Moura-Netto C, Zenkner CdLL, Pagliarin CML, Barletta FB, et al. Accuracy of working length determination using 3 electronic apex locators and direct digital radiography. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2011; 111(3): e44-9.
  21. Cianconi L, Angotti V, Felici R, Conte G, Mancini M. Accuracy of three electronic apex locators compared with digital radiography: an ex vivo study. J Endod 2010; 36(12): 2003-7.
  22. Guise GM, Goodell GG, Imamura GM. In vitro comparison of three electronic apex locators. J Endod 2010; 36(2): 279-81.
  23. Eid BM, Wally AS. Accuracy of two apex locators in calculating working length in molar primary teeth: An ex vivo study. Egypt Dent J 2018; 64(2): 1507-12.
  24. Mousavi E, Mohajer Saem M, Atrkar Roshan Z, Pourhabibi Z. Comparison of working length determination using apex locator and conventional radiography in curved canals-an in vitro study. Dentomaxillofac Radiol 2016; 5(4): 17-22.
  25. Pascon EÁ, Marrelli M, Congi O, Ciancio R, Miceli F, Versiani MA. An ex vivo comparison of working length determination by 3 electronic apex locators. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2009; 108(3): e147-51.
  26. Wrbas KT, Ziegler AA, Altenburger MJ, Schirrmeister JF. In vivo comparison of working length determination with two electronic apex locators. Int Endod J 2007; 40(2): 133-8.
  27. Saraf PA, Ratnakar P, Patil TN, Penukonda R, Kamatagi L, Vanaki SS. A comparative clinical evaluation of accuracy of six apex locators with intraoral periapical radiograph in multirooted teeth: An in vivo study. J Conserv Dent 2017; 20(4): 264-8.
  28. Goldberg F, Marroquín BB, Frajlich S, Dreyer C. In vitro evaluation of the ability of three apex locators to determine the working length during retreatment. J Endod 2005; 31(9): 676-8.
  29. Goldberg F, Frajlich S, Kuttler S, Manzur E, Briseño-Marroquín B. The evaluation of four electronic apex locators in teeth with simulated horizontal oblique root fractures. J Endod 2008; 34(12): 1497-9.
  30. DAssunção FLC, de Albuquerque DS, de Queiroz Ferreira LC. The ability of two apex locators to locate the apical foramen: an in vitro study. J Endod 2006; 32(6): 560-2.
Journal of Isfahan Dental School
Volume 21, Issue 1
Volume 21, Issue 1, April 2025
Spring 2025
Pages 20-28