In Vitro Evaluation of Bond Strength to Dentin of Two Post Systems: Computer-aided Design and Computer-aided Manufacturing Fiber Posts vs Splendor Single Adjustable Post
Maryanna de Souza Guimarães, Carlos E da Silveira Bueno, Alexandre S de Martin, Carlos E Fontana, Rina A Pelegrine, Sérgio L Pinheiro, Daniel G Pedro Rocha
Keywords :
Dental restoration failure, Dentin bonding agents, Post and core technique, Resin cements, Tensile strength
Citation Information :
Guimarães MD, Bueno CE, de Martin AS, Fontana CE, Pelegrine RA, Pinheiro SL, Rocha DG. In Vitro Evaluation of Bond Strength to Dentin of Two Post Systems: Computer-aided Design and Computer-aided Manufacturing Fiber Posts vs Splendor Single Adjustable Post. J Contemp Dent Pract 2022; 23 (4):388-392.
Aim: To assess dentin–post bond strength and mode of failure through tensile strength testing of two endodontic post systems: CAD/CAM custom-milled fiber posts vs Splendor SAP.
Materials and methods: Thirty extracted single-rooted mandibular premolars were sectioned 2 mm coronal to the cementoenamel junction. Root length was standardized at 15 mm, and the root canals were instrumented with #20 K-files followed by 30/0.03 and 30/0.05 ProDesign Logic rotary files, under irrigation with 2.5% NaOCl, and then submitted to final irrigation with 17% EDTA. Canals were filled with gutta-percha and AH PLUS sealer. After 24 hours, the teeth were prepared for post placement to a depth of 10 mm and randomly allocated into two experimental groups (n = 15): CAD/CAM (CC) and Splendor SAP (SS). All posts were cemented with RelyX U200 dual-cure self-adhesive resin cement. The roots were embedded in acrylic resin, and the specimens were stored for 7 days in moist heat (37°C). Tensile strength testing until failure was then performed in a universal testing machine using a crosshead speed of 0.5 mm/minute. The final failure load was tabulated for statistical analysis, and the G test was used to compare the failure modes observed under light microscopy (5× magnification).
Results: There was no significant difference between groups regarding tensile bond strength to root dentin (p = 0.325). Conversely, failure mode differed significantly between groups (p = 0.037).
Conclusion: The tensile bond strength observed for the CAD/CAM and Splendor SAP post systems was similar. Adhesive failure was predominant in both groups; however, the CAD/CAM custom-milled fiber posts failed predominantly at the dentin–resin cement interface, whereas Splendor SAP posts failed mostly at the post–resin cement interface.
Clinical significance: A strong post–dentin bond is a key to the success of dental restorations and prosthetic rehabilitation. In teeth with severe coronal decay and wide canals, both of the tested systems would be able to achieve good cervical fit.
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.
Oliveira ACM, Tanomaru JMG, Faria-Junior N, et al. Bacterial leakage in root canals filled with conventional and MTA-based sealers. Int Endod J 2011;44(4):370–375. DOI: 10.1111/j.1365-2591.2011.01852.x.
Al-Omiri MK, Mahmoud AA, Rayyan MR, et al. Fracture resistance of teeth restored with post-retained restorations: an overview. J Endod 2010;36(9):1439–1449. DOI: 10.1016/j.joen.2010.06.005.
Mjör IA, Smith MR, Ferrari M, et al. The structure of dentine in the apical region of human teeth. Int Endod J 2001;34(5):346–353. DOI: 10.1046/j.1365-2591.2001.00393.x.
Monticelli F, Ferrari M, Toledano M. Cement system and surface treatment selection for fiber post luting. Med Oral Patol Oral Cir Bucal 2008;13(3):214–221. PMID: 18305446.
Skupien JA, Sarkis-Onofre R, Cenci MS, et al. A systematic review of factors associated with the retention of glass fiber posts. Braz Oral Res 2015;29:S1806-83242015000100401. DOI: 10.1590/1807-3107BOR-2015.vol29.0074.
Lamichhane A, Xu C, Zhang, F. Dental fiber-post resin base material: a review. J Adv Prosthodont 2014;6(1):60–65. DOI: 10.4047/jap.2014.6.1.60.
Pang J, Feng C, Zhu X, et al. Fracture behaviors of maxillary central incisors with flared root canals restored with CAD/CAM integrated glass fiber post-and-core. Dent Mater J 2018;38(1):114–119. DOI: 10.4012/dmj.2017-394.
Miyazaki T, Hotta Y, Kunii J, et al. A review of dental CAD\CAM: current status and future perspectives from 20 years of experience. Dent Mater J 2009;28(1):44–56. DOI: 10.4012/dmj.28.44.
Liu P, Deng X-L, Wang X-Z. Use of a CAD\CAM-fabricated glass fiber post and core to restore fractured anterior teeth: a clinical report. J Prosthet Dent 2010;103(6):330–333. DOI: 10.1016/S0022-3913(10)60071-6.
Pereira JF, Da Rosa RA, Só MCR, et al. Push-out bond strength of fiber posts to root dentin using glass ionomer and resin modified glass ionomer cements. J Appl Oral Sci 2014;22(5):390–396. DOI: 10.1590/1678-775720130466.
Faul F, Erdfelder E, Buchner A, et al. Statistical power analyses using G*Power 3.1: tests for correlation and regression analyses. Behav Res Methods 2009;41(4):1149–1160. DOI: 10.3758/BRM.41.4.1149.
Ferreira R, Prado M, Soares AJ, et al. Influence of using clinical microscope as auxiliary to perform mechanical cleaning of post space: a bond strength analysis. J Endod 2015;41(8):1311–1316. DOI: 10.1016/j.joen.2015.05.003.
Albashaireh ZS, Ghazal M, Kern M. Effects of endodontic post surface treatment, dentin conditioning, and artificial aging on the retention of glass fiber-reinforced composite resin posts. J Prosthet Dent 2010;103(1):31–39. DOI: 10.1016/S0022-3913(09)60212-2.
Macedo VC, Faria e Silva AL, Martins LRM. Effect of cement type, relining procedure, and length of cementation on pull-out bond strength of fiber posts. J Endod 2010;36(9):1543–1546. DOI: 10.1016/j.joen.2010.04.014.
Tian Y, Mu Y, Setzer FC, et al. Failure of fiber posts after cementation with different adhesives with or without silanization investigated by pullout tests and scanning electron microscopy. J Endod 2012;38(9):1279–1282. DOI: 10.1016/j.joen.2012.06.022.
Nova V, Karygianni L, Altenburger MJ, et al. Pull-out bond strength of a fibre-reinforced composite post system luted with self-adhesive resin cements. J Dent 2013;41(11):1020–1026. DOI: 10.1016/j.jdent.2013.08.011.
Pelegrine RA, Paulillo LAMS, Kato AS, et al. Effect of endodontic retreatment on push-out bond strength and quality of fiber postbonding interface of resin cements. J Contemp Dent Pract 2016;17(1):42–48. DOI: 10.5005/jp-journals-10024-1801.
Li X-J, Zhao S-J, Niu L-N, et al. Effect of luting cement and thermomechanical loading on retention of glass fibre posts in root canals. J Dent 2014;42(1):75–83. DOI: 10.1016/j.jdent.2013.10.017.
Quitero MFZ, Garone-Netto N, De Freitas PM, et al. Effect of post translucency on bond strength of different resin luting agents to root dentin. J Prosthet Dent 2014;111(1):35–41. DOI: 10.1016/j.prosdent.2013.09.012.
Wang X, Shu X, Zhang Y, et al. Evaluation of fiber posts vs metal posts for restoring severely damaged endodontically treated teeth: a systematic review and meta-analysis. Quintessence Int 2019;50(1):8–20. DOI: 10.3290/j.qi.a41499.
Choudhary S, Begum Z, Choudhary P, et al. Comparative evaluation of retention of prefabricated and conventional cast post: an in vitro study. J Int Soc Prevent Community Dent 2014;4(2):87–91. DOI: 10.4103/2231-0762.137635.
Prado NAS, Ferreira RS, Maurício MHP, et al. Influence of the cement film thickness on the push-out bond strength of glass fiber posts cemented in human root canals. Int J Dent 2016;2016:9319534. DOI: 10.1155/2016/9319534.
Migliau G, Piccoli L, Di Carlo S, et al. Comparison between three glass fiber post cementation techniques. Ann Stomatol 2017;8(1):29–33. DOI: 10.11138/ads/2017.8.1.029.
Maroulakos G, He J, Nagy WW. The post-endodontic adhesive interface: theoretical perspectives and potential flaws. J Endod 2018;44(3):363–371. DOI: 10.1016/j.joen.2017.11.007.
