International Journal of Prosthodontics and Restorative Dentistry

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VOLUME 14 , ISSUE 2 ( April-June, 2024 ) > List of Articles


Comparison of Fracture Resistance and Mode of Fracture of Ultraconservative and Conventional Fiber Posts: An In Vitro Study

Janki K Prajapati, Chintan Joshi, Sweety J Thumar, Mona C Somani, Palak Ranpariya, Mahima P Jain

Keywords : EasyPost, Fiber post, Fracture resistance, Hi-Rem post, Unconventional post

Citation Information : Prajapati JK, Joshi C, Thumar SJ, Somani MC, Ranpariya P, Jain MP. Comparison of Fracture Resistance and Mode of Fracture of Ultraconservative and Conventional Fiber Posts: An In Vitro Study. Int J Prosthodont Restor Dent 2024; 14 (2):114-120.

DOI: 10.5005/jp-journals-10019-1452

License: CC BY-NC 4.0

Published Online: 29-06-2024

Copyright Statement:  Copyright © 2024; The Author(s).


Purpose: The fracture resistance and mode of fracture in maxillary incisors restored with the ultraconservative post (size 0) and conventional fiber posts (sizes 1 and 2) subjected to 45° stress. Materials and methods: A total of 60 extracted human permanent maxillary central incisors were decoronated, instrumented, and obturated using the sectional obturation technique. Six groups (n = 10 samples each) were created—group I (size 0 Hi-Rem post), group II (size 1 Hi-Rem post), group III (size 2 Hi-Rem post), group IV (size 0 EasyPost), group V (size 1 EasyPost), and group VI (size 2 EasyPost). Post space was prepared in each root, preparing posts for cementation and core buildup. The specimens were tested for fracture resistance using a universal testing machine at a 45° angle and 1 mm/minute. The mode of failure was visually determined. The paired t-test was done to analyze the difference in fracture resistance within the groups, and the unpaired t-test was used to compare the groups. Results: The mean fracture resistance of EasyPost and Hi-Rem posts with size 0 was higher (618.30 and 624.40 N, respectively) than sizes 1 (544.80 and 561.20 N, respectively) and 2 (464.40 and 479.70 N, respectively). There were statistically significant mean value differences between the two groups for size 1 post (p = 0.008). In all three sizes, Hi-Rem showed a higher mean fracture resistance value than EasyPost. Conclusion: This study found that ultraconservative posts (size 0) of Hi-Rem and EasyPost had greater fracture resistance than conservative posts (sizes 1 and 2). Furthermore, size 0 Hi-Rem posts performed marginally better than size 0 EasyPost. Favorable fractures are most common with both Hi-Rem and EasyPost.

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  1. Schestatsky R, Dartora G, Felberg R, et al. Do endodontic retreatment techniques influence the fracture strength of endodontically treated teeth? A systematic review and meta-analysis. J Mech Behav Biomed Mater 2019;90:306–312. DOI: 10.1016/j.jmbbm.2018.10.030
  2. Dotto L, Girotto LPS, Correa Silva Sousa YT, et al. Factors influencing the clinical performance of the restoration of endodontically treated teeth: an assessment of systematic reviews of clinical studies. J Prosthet Dent 2022;5:S0022–3913(22)00213-X. DOI: 10.1016/j.prosdent.2022.03.030
  3. Alshahrani AS, Alamri HB, Nadrah FM, et al. Fracture resistance of endodontically treated teeth restored with fiber posts luted with composite core materials. J Contemp Dent Pract 2020;21(4):383–389. DOI: 10.5005/jp-journals-10024-2814
  4. Rodrigues de Matos LM, Lopes Silva M, Oliveira Cordeiro T, et al. Fracture resistance of endodontically treated teeth and restored with different fiber posts in distinct diameters. Res Soc Dev 2022;11(7):e56111730169. DOI: 10.33448/rsd-v11i7.30169
  5. Gopal S, Irodi S, Mehta D, et al. Fracture resistance of endodontically treated roots restored with fiber posts using different resin cements- an in-vitro study. J Clin Diagn Res 2017;11(2):ZC52–ZC55. DOI: 10.7860/JCDR/2017/21167.9387
  6. Orsi PB. Experimental and clinical report on overfibers endodontic fiber posts. J Dent 1981;9:231–239.
  7. Nokar S, Mortazavi MS, Niakan S. Effect of glass fiber post diameter on fracture resistance of endodontically treated teeth. Pesqui Bras Odontopediatria Clín Integr 2020;20:e5413.
  8. Barjau-Escribano A, Sancho-Bru JL, Forner-Navarro L, et al. Influence of prefabricated post material on restored teeth: fracture strength and stress distribution. Oper Dent 2006;31(1):47–54. DOI: 10.2341/04-169
  9. Santos-Filho PC, Veríssimo C, Soares PV, et al. Influence of ferrule, post system, and length on biomechanical behavior of endodontically treated anterior teeth. J Endod 2014;40(1):119–123. DOI: 10.1016/j.joen.2013.09.034
  10. Sinha SA. Comparative evaluation of the fracture resistance of two different prefabricated aesthetic post and core systems–an in vitro study. Diss Rajiv Gandhi University of Health Sciences (India) 2017.
  11. Tey KC, Lui JL. The effect of glass fiber-reinforced epoxy resin dowel diameter on the fracture resistance of endodontically treated teeth. J Prosthodont 2014;23(7):572–581. DOI: 10.1111/jopr.12146
  12. Fadag A, Negm N, Samran A, et al. Fracture resistance of endodontically treated anterior teeth restored with different post systems. An in vitro study. Eur Endod J 2018;3(3):174–178. DOI: 10.14744/eej.2018.70299
  13. Samran A, Najjar MO, Samran A, et al. Influence of different post luting cements on the fracture strength of endodontically treated teeth: an in vitro study. Eur Endod J 2018;3(2):113–117. DOI: 10.14744/eej.2018.03522
  14. Marshall GW Jr, Marshall SJ, Kinney JH, et al. The dentin substrate: structure and properties related to bonding. J Dent 1997;25(6):441–458. DOI: 10.1016/s0300-5712(96)00065-6
  15. Smales RJ, Hawthorne WS. External cervical resorption and restorative dentistry: a review of the aetiology, diagnosis and management. Int Endod J 2019;52(6):769–785.
  16. Samran A, El Bahra S, Kern M. The influence of substance loss and ferrule height on the fracture resistance of endodontically treated premolars. An in vitro study. Dent Mater 2013;29(12):1280–1286. DOI: 10.1016/
  17. von Stein-Lausnitz M, Bruhnke M, Rosentritt M, et al. Direct restoration of endodontically treated maxillary central incisors: post or no post at all? Clin Oral Investig 2019;23(1):381–389. DOI: 10.1007/s00784-018-2446-6
  18. Naumann M, Sterzenbach G, Rosentritt M, et al. Fracture resistance of upper and lower incisors restored with glass and quartz fiber-reinforced composite posts. Am J Dent 2014;27(4):193–198.
  19. Cormier CJ, Burns DR, Moon P. In vitro comparison of the fracture resistance and failure mode of fiber, ceramic, and conventional post systems at various stages of restoration. J Prosthodont 2001;10(1):26–36. DOI: 10.1111/j.1532-849x.2001.00026.x
  20. Naumann M, Sterzenbach G, Dietrich T, et al. Dentin-like versus rigid endodontic post: 11-year randomized controlled pilot trial on no-wall to two-wall defects. J Endod 2017;43(11):1770–1775. DOI: 10.1016/j.joen.2017.06.030
  21. Juloski J, Radovic I, Goracci C, et al. Ferrule effect: a literature review. J Endod 2012;38(1):11–19. DOI: 10.1016/j.joen.2011.09.024
  22. Zicari F, Van Meerbeek B, Scotti R, et al. Effect of fibre postlength and adhesive strategy on fracture resistance of endodontically treated teeth after fatigue loading. J Dent 2012;40(4):312–318. DOI: 10.1016/j.jdent.2012.01.006
  23. Shillingburg HT, Kessler JC, Wilson EL. Root dimensions and dowel size. J Calif Dent Assoc 1982;10(10):43–49.
  24. Sirimai S, Riis DN, Morgano SM. An in vitro study of the fracture resistance and the incidence of vertical root fracture of pulpless teeth restored with six post-and-coresystems. J Prosthet Dent 1999;81(3):262–269. DOI: 10.1016/s0022-3913(99)70267-2
  25. Singh V. Comparative evaluation of fracture resistance of endodontically treated teeth restored with resin fiber post and stainless steel post: an in vitro study. Dent J Adv Stud 2015;3:080–084. DOI: 10.1055/s-0038-1672019
  26. Abduljabbar T, Sherfudhin H, AlSaleh SA, et al. Fracture resistance of three post and core systems in endodontically treated teeth restored with all-ceramic crowns. J King Saud Univ Sci 2012;3(1):33–38. DOI: 10.1016/j.ksujds.2011.10.001
  27. Izadi A, Heidari B, Fotovat F, et al. Effect of photo core, LuxaCore, and core max II core building materials on fracture resistance of endodontically-treated teeth restored with fiber-reinforced composite posts and ParaPosts. J Dent Res 2020;17(4):244–250. DOI: 10.4103/1735-3327.292068
  28. Assif D, Gorfil C. Biomechanical considerations in restoring endodontically treated teeth. J Prosthet Dent 1994; 71(6):565–567. DOI: 10.1016/0022-3913(94)90438-3
  29. Santos Pantaleón D, Morrow BR, Cagna DR, et al. Influence of remaining coronal tooth structure on fracture resistance and failure mode of restored endodontically treated maxillary incisors. J Prosthet Dent 2018;119(3):390–396. DOI: 10.1016/j.prosdent.2017.05.007
  30. Rodriguez-Cervantes PJ, Sancho-Bru JL, Barjau-Escribano A, et al. Influence of prefabricated post dimensions on restored maxillary central incisors. J Oral Rehabil 2007;34:141–152. DOI: 10.1111/j.1365-2842.2006.01720.x
  31. Lyons MF, Baxendale RH. A preliminary electromyographic study of bite force and jaw-closing muscle fatigue in human subjects with advanced tooth wear. J Oral Rehabil 1990;17(4):311–318. DOI: 10.1111/j.1365-2842.1990.tb00014.x
  32. Robbins JW. Restoration of the endodontically treated tooth. Dent Clin North Am 2002;46(2):367–384. DOI: 10.1016/s0011-8532(01)00006-4
  33. Potashnick S, Weine F, Strauss S. 4th ed. St. Louis: CV Mosby; 1989. Endodontic Therapy; pp. 640–684.
  34. Jurema ALB, Filgueiras AT, Santos KA, et al. Effect of intraradicular fiber post on the fracture resistance of endodontically treated and restored anterior teeth: a systematic review and meta-analysis. J Prosthet Dent 2022;128(1):13–24. DOI: 10.1016/j.prosdent.2020.12.013
  35. Hayashi M, Takahashi Y, Imazato S, et al. Fracture resistance of pulpless teeth restored with post-cores and crowns. Dent Mater 2006;22(5):477–485. DOI: 10.1016/
  36. Raval HJ, Rami DS, Parmar V. Biological dentin post: a novel approach for esthetic restoration. Int J Sci Res 2020;9(5):1–3. DOI: 10.36106/ijsr
  37. Marchionatti AM, Wandscher VF, Broch J, et al. Influence of periodontal ligament simulation on bond strength and fracture resistance of roots restored with fiber posts. J Appl Oral Sci 2014;22(5):450–458. DOI: 10.1590/1678-775720140067
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