Issues‎ > ‎Vol 7, issue 1‎ > ‎

sdj-10103

Failure Modes of New Fiber Post Systems Using Stereomicroscope: An in Vitro Study

Hani M. Mouafaq* , Shakhawan K. Kadir** 

Department of Conservative Dentistry, M.Sc. Students, College of Dentistry, Hawler Medical University, Erbil, Iraq.
** Department of Conservative Dentistry, College of Dentistry, Hawler Medical University, Erbil, Iraq.

Submitted: 12/08/2019; Accepted: 25/02/2020; Published 01/06/2020

DOI: https://doi.org/10.17656/sdj.10103

Abstract

Objective: Failure of the glass posts is a major and the main concern of practical dentistry. This study conducted to evaluate the mode of failure among prefabricated bundle fiber posts, prefabricated taper fiber posts, and short fiber-reinforced composite as a post and luting material using a stereomicroscope.       

Methods: Thirty mandibular premolars were divided into three groups (n=10). Group 1: prefabricated taper fiber post cemented with a resin core, group 2: prefabricated bundle fiber post cemented with a resin core and group 3: short fiber-reinforced composite used instead of post and cement. Each root specimen cut into three slices of 2 mm thickness from the cervical, middle, and apical parts of the posts. Push-out tests were performed using a universal testing machine at three sites in each root at a crosshead speed of 0.5 mm/min. Then, the specimens evaluated under stereomicroscope 40X to classify the failure mode.

Results: Sixty two specimens failed adhesively between dentin and cement in all groups, adhesive failure between the post and cement was in the second group, prefabricated taper fiber post (GC fiber post) followed by prefabricated bundle fiber posts (Rebilda GT) (17 sections), and the mixed failure was second for prefabricated bundle fiber posts (Rebilda GT) and third for prefabricated taper fiber post (GC fiber post) (11sections). 

Conclusions: Adhesive failure between cement and dentin is dominant in all post systems in three sites of the roots (cervical, middle, and apical). The second most frequent failure is adhesive between post and cement in all regions in post systems.

                                                                                                                                                                                                                                                                                                                                             

Keywords: Fiber post; Bundle post, Short fiber-reinforced composite, Failure modes.                                                                                                                                                                                             Full Article - PDF                                                                                                                                                                                                                                   
                                                                                                                                                                                                                                                                                                                                                   

References:


1. Kulkarni K, Godbole SR, Sathe S, Gotoorkar S, Jaiswal P, Mukherjee P. Evaluation of the mode of failure of glass fiber posts: An in vitro study. Int J Sci Stud 2016;3(12):34-9.
2. Federick DR. An application of the dowel and composite resin core technique. J Prosthet Dent. 1974;32(4):420-4.
3. Amin RA, Mandour MH, Abd El-Ghany OS. Fracture strength and nanoleakage of weakened roots reconstructed using relined glass fiber- reinforced dowels combined with a novel prefabricated core system. J Prosthodont. 2014;23(6):484–94.
4. Zogheib LV, Saavedra G de SFA, Cardoso PE, Valera MC, Araújo MAM de. Resistance to compression of weakened roots subjected to different root reconstruction protocols. J Appl Oral Sci. 2011;19(6):648–54.
5. Voco the dentalists. Rebilda® Post GT - Bundled glass fiber-reinforced composite post. 2016.
6. Nagas E, Cekic-Nagas I, Egilmez F, Ergun G, Vallittu PK, Lassila LVJ. Bond strength of fiber posts and short fiber-reinforced composite to root canal dentin following cyclic loading. J Adhes Sci Technol. 2017;31(13):1397–407.
7. Siddiq AA, Rayyan MM, Lucette S, Farghaly EA, Hamza GE. Failure mode of 2 fiber posts bonded using 3 different adhesive systems. Egyptian Dent J. 2018;64(2):833-9.
8. Baena E, Flores A, Ceballos L. Influence of root dentin treatment on the push-out bond strength of fiber posts. Odontology. 2017;105(2):170–7.
9. Durski MT, Metz MJ, Thompson JY, Mascarenhas AK, Crim GA, Vieira S, et al. Push- out bond strength evaluation of glass fiber posts with different resin cements and application techniques. Oper Dent. 2016;41(1):103–10.
10. Priti D, Anatava M, Kaushik D, UK Das. Comparison of push-out bond strength of customizable fiber post using two self adhesive resin cement-an in-vitro study. Adv Dent Oral Health. 2016;2(1):001-6.
11. Machado J, Almeida P, Fernandes S, Marques A, Vaz M. Currently used systems of dental posts for endodontic treatment. Procedia Structural Integrity. 2017;5:27–33.
12. Marcos RMH-C, Kinder GR, Alfredo E, Quaranta T, Correr GM, Cunha LF da, et al. Influence of the resin cement thickness on the push-out bond strength of glass fiber posts. Braz Dent J. 2016;27(5):592–8.
13. Sarkis-Onofre R, Skupien JA, Cenci MS, Moraes RR, Pereira-Cenci T. The role of resin cement on bond strength of glass-fiber posts luted into root canals: A systematic review and meta-analysis of in vitro studies. Oper Dent. 2014;39(1):E31-44.
14. Daleprane B, Pereira CNB, Bueno AC, Ferreira RC, Moreira AN, Magalhães CS. Bond strength of fiber posts to the root canal: effects of anatomic root levels and resin cements. J Prosthet Dent. 2016;116(3):416–24.
15. De Munck J, Vargas M, Van Landuyt K, Hikita K, Lambrechts P, Van Meerbeek B. Bonding of an auto-adhesive luting material to enamel and dentin. Dent Mater. 2004;20(10):963–71.
16. Rocha AT, Gonçalves LM, Vasconcelos AJ de C, Matos Maia Filho E, Nunes Carvalho C, De Jesus Tavarez RR. Effect of anatomical customization of the fiber post on the bond strength of a self- adhesive resin cement. Int J Dent. 2017;11(3):873–5.
17. Alkhudhairy FI, Yaman P, Dennison J, McDonald N, Herrero A, Bin-Shuwaish MS. The effects of different irrigation solutions on the bond strength of cemented fiber posts. Clin Cosmet Investig Dent. 2018;10:221-30.
18. Sultan SE, Korsiel AM, Kamel MS, Etman WM. Effect of different surface treatments of luted fiber posts on push out bond strength to root dentin. Tanta Dent J. 2013;10(3):116–22.
19. Van Ende A, De Munck J, Van Landuyt KL, Poitevin A, Peumans M, Van Meerbeek B. Bulk- filling of high C-factor posterior cavities: Effect on adhesion to cavity-bottom dentin. Dent Mater. 2013; 29(3):269–77.
20. Li X, Pongprueksa P , V an Meerbeek B, De Munck J. Curing profile of bulk-fill resin-based composites. J Dent. 2015;43(6):664–72.











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