Restor Dent Endod.  2020 May;45(2):e19. 10.5395/rde.2020.45.e19.

Effect of ultrasonic cleaning on the bond strength of fiber posts in oval canals filled with a premixed bioceramic root canal sealer

• Bengoa FP
• Arze MCM
• Noguera CM
• Moreira LFN
• Kato AS
• Bueno CEDS

• KMID: 2503514
• DOI: http://doi.org/10.5395/rde.2020.45.e19

Abstract

Objective
This study aimed to evaluate the effect of ultrasonic cleaning of the intracanal post space on the bond strength of fiber posts in oval canals filled with a premixed bioceramic (Bio-C Sealer [BIOC]) root canal sealer.
Materials and Methods
Fifty premolars were endodontically prepared and divided into 5 groups (n = 10), based on the type of root canal filling material used and the post space cleaning protocol. A1: gutta-percha + AH Plus (AHP) and post space preparation with ultrasonic cleaning, A2: gutta-percha + BIOC and post space preparation with ultrasonic cleaning, B1: gutta-percha + AHP and post space preparation, B2: gutta-percha + BIOC and post space preparation, C: control group. Fiber posts were cemented with a self-adhesive luting material, and 1 mm thick slices were sectioned from the middle and cervical third to evaluate the remaining filling material microscopically. The samples were subjected to a push-out test to analyze the bond strength of the fiber post, and the results were analyzed with the Shapiro-Wilk, Bonferroni, Kruskal-Wallis, and Mann-Whitney tests (p < 0.05). Failure modes were evaluated using optical microscopy.
Results
The results showed that the fiber posts cemented in canals sealed with BIOC had lower bond strength than those sealed with AHP. The ultrasonic cleaning of the post space improved the bond strength of fiber posts in canals sealed with AHP, but not with BIOC.
Conclusions
BIOC decreased the bond strength of fiber posts in oval canals, regardless of ultrasonic cleaning.

Keyword

Endodontics; Push-out bond strength; Sealer; Ultrasonic tips

Figure

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  Figure 1 Distribution of all bond strength values ​​in both zones, groups and techniques. It is observed in samples filled with AHP and those prepared with ultrasonic tips obtained higher values ​​of bond strength than those prepared only with the post drills system, with significant differences in both analyzed thirds. The samples sealed with BIOC showed no differences between those prepared with ultrasonic tips or post drills system in the two-thirds analyzed.US, ultrasonic preparation; R, rotatory preparation; AHP, AH Plus; BIOC, Bio-C Sealer.a,b,c,dSame superscript letters indicate significant diferences between groups (p < 0.05).

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  Figure 2 Distribution of the remaining intracanal filling material, in both zones, preparation techniques and sealer. The samples prepared with ultrasonic tips showed no differences and the samples prepared with the post drills system showed significant differences between the 2 sealers. The control group was not considered because the middle and cervical third of the canal were not filled.US, ultrasonic preparation; R, rotatory preparation; AHP, AH Plus; BIOC, Bio-C Sealer.a,b,c,d,e,fSame superscript letters indicate significant diferences between groups (p < 0.05).

Reference

1. Jiang S, Zou T, Li D, Chang JW, Huang X, Zhang C. Effectiveness of sonic, ultrasonic, and photon-induced photoacoustic streaming activation of NaOCl on filling material removal following retreatment in oval canal anatomy. Photomed Laser Surg. 2016; 34:3–10. PMID: 26682489.

2. Martinho FC, Carvalho CA, Oliveira LD, de Lacerda AJ, Xavier AC, Augusto MG, Zanatta RF, Pucci CR. Comparison of different dentin pretreatment protocols on the bond strength of glass fiber post using self-etching adhesive. J Endod. 2015; 41:83–87. PMID: 25246368.

3. Barreto MS, Rosa RA, Seballos VG, Machado E, Valandro LF, Kaizer OB, Só M, Bier C. Effect of intracanal irrigants on bond strength of fiber posts cemented with a self-adhesive resin cement. Oper Dent. 2016; 41:e159–e167. PMID: 27603176.

4. Vilas-Boas DA, Grazziotin-Soares R, Ardenghi DM, Bauer J, de Souza PO, de Miranda Candeiro GT, Maia-Filho EM, Carvalho CN. Effect of different endodontic sealers and time of cementation on push-out bond strength of fiber posts. Clin Oral Investig. 2018; 22:1403–1409.

5. Rivera-Peña ME, Duarte MA, Alcalde MP, DE Andrade FB, Vivan RR. A novel ultrasonic tip for removal of filling material in flattened/oval-shaped root canals: a microCT study. Braz Oral Res. 2018; 32:e88. PMID: 30110086.

6. Cavenago BC, Ordinola-Zapata R, Duarte MA, del Carpio-Perochena AE, Villas-Bôas MH, Marciano MA, Bramante CM, Moraes IG. Efficacy of xylene and passive ultrasonic irrigation on remaining root filling material during retreatment of anatomically complex teeth. Int Endod J. 2014; 47:1078–1083. PMID: 24456216.

7. Chen X, Liu H, He Y, Luo T, Zou L. Effects of endodontic sealers and irrigation systems on smear layer removal after post space preparation. J Endod. 2018; 44:1293–1297. PMID: 30053936.

8. Utneja S, Nawal RR, Talwar S, Verma M. Current perspectives of bio-ceramic technology in endodontics: calcium enriched mixture cement - review of its composition, properties and applications. Restor Dent Endod. 2015; 40:1–13. PMID: 25671207.

9. Kırmalı Ö, Üstün Ö, Kapdan A, Kuştarcı A. Evaluation of various pretreatments to fiber post on the push-out bond strength of root canal dentin. J Endod. 2017; 43:1180–1185. PMID: 28527844.

10. Dimitrouli M, Günay H, Geurtsen W, Lührs AK. Push-out strength of fiber posts depending on the type of root canal filling and resin cement. Clin Oral Investig. 2011; 15:273–281.

11. Fruchi Lde C, Ordinola-Zapata R, Cavenago BC, Hungaro Duarte MA, Bueno CE, De Martin AS. Efficacy of reciprocating instruments for removing filling material in curved canals obturated with a single-cone technique: a micro-computed tomographic analysis. J Endod. 2014; 40:1000–1004. PMID: 24935552.

12. Rödig T, Reicherts P, Konietschke F, Dullin C, Hahn W, Hülsmann M. Efficacy of reciprocating and rotary NiTi instruments for retreatment of curved root canals assessed by micro-CT. Int Endod J. 2014; 47:942–948. PMID: 24386931.

13. Silva EJ, Sá L, Belladonna FG, Neves AA, Accorsi-Mendonça T, Vieira VT, De-Deus G, Moreira EJ. Reciprocating versus rotary systems for root filling removal: assessment of the apically extruded material. J Endod. 2014; 40:2077–2080. PMID: 25442728.

14. Martinho FC, Freitas LF, Nascimento GG, Fernandes AM, Leite FR, Gomes AP, Camões IC. Endodontic retreatment: clinical comparison of reciprocating systems versus rotary system in disinfecting root canals. Clin Oral Investig. 2015; 19:1411–1417.

15. Coniglio I, Magni E, Cantoro A, Goracci C, Ferrari M. Push-out bond strength of circular and oval-shaped fiber posts. Clin Oral Investig. 2011; 15:667–672.

16. Schmage P, Pfeiffer P, Pinto E, Platzer U, Nergiz I. Influence of oversized dowel space preparation on the bond strengths of FRC posts. Oper Dent. 2009; 34:93–101. PMID: 19192843.

17. Muñoz C, Llena C, Forner L. Oval fiber posts do not improve adaptation to oval-shaped canal walls. J Endod. 2011; 37:1386–1389. PMID: 21924187.

18. Rechenberg DK, Paqué F. Impact of cross-sectional root canal shape on filled canal volume and remaining root filling material after retreatment. Int Endod J. 2013; 46:547–555. PMID: 23190273.

19. Cecchin D, Farina AP, Souza MA, Carlini-Júnior B, Ferraz CC. Effect of root canal sealers on bond strength of fibreglass posts cemented with self-adhesive resin cements. Int Endod J. 2011; 44:314–320. PMID: 21219360.

20. Oltra E, Cox TC, LaCourse MR, Johnson JD, Paranjpe A. Retreatability of two endodontic sealers, EndoSequence BC Sealer and AH Plus: a micro-computed tomographic comparison. Restor Dent Endod. 2017; 42:19–26. PMID: 28194360.

21. Guimarães LS, Gomes CC, Marceliano-Alves MF, Cunha RS, Provenzano JC, Siqueira JF Jr. Preparation of oval-shaped canals with TRUShape and Reciproc Systems: a micro–computed tomography study using contralateral premolars. J Endod. 2017; 43:1018–1022. PMID: 28416315.

22. Keleş A, Alcin H, Kamalak A, Versiani MA. Micro-CT evaluation of root filling quality in oval-shaped canals. Int Endod J. 2014; 47:1177–1184. PMID: 24527697.