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Vitória MS, de Almeida ENM, Barros APO, de Oliveira ECG, Costa JLDSG, Dantas AAR, Kuga MC. Evaluation of different mechanical cleaning protocols associated with 2.5% sodium hypochlorite in the removal of residues from the post space. JOURNAL OF CONSERVATIVE DENTISTRY AND ENDODONTICS 2024; 27:274-279. [PMID: 38634029 PMCID: PMC11019817 DOI: 10.4103/jcde.jcde_324_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 12/29/2023] [Accepted: 01/04/2024] [Indexed: 04/19/2024]
Abstract
Aims This study evaluated the effectiveness of different mechanical protocols using rotary brush (RB), ultrasonic tip, and oscillatory system (OS) associated with 2.5% sodium hypochlorite (NaOCl) in the removal of residues and dentin permeability in the cervical and apical segments of the post space. Settings and Design Experimental in vitro study. Methods Forty roots from human first molars were prepared and divided into four groups according to the cleaning protocols: Control (CO), NaOCl 2.5% conventional irrigation with a syringe; RB associated with NaOCl 2.5%; ultrasonic tip (US) associated with NaOCl 2.5%; OS associated with NaOCl 2.5%. Statistical Analysis Used The persistence of residues was evaluated by scanning electron microscopy and data submitted to Kruskal-Wallis and Dunn tests, and dentin permeability evaluated by confocal microscopy and date submitted to ANOVA one-way and Tukey's tests (P = 0.05). Results There were no differences in residue cleaning among the CO, RB, US, and OS groups, regardless of the analyzed root segment (P > 0.05). When comparing groups, dentin permeability in the CO group was significantly lower in the cervical segment (P < 0.05). Conclusions The OS group promoted the highest permeability value in the apical segment. RB, US, and OS are similar in removing residues from the post space. However, OS results in higher dentin permeability in the apical segment.
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Affiliation(s)
- Matheus Sousa Vitória
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University – UNESP, Araraquara, SP, Brazil
| | - Eran Nair Mesquita de Almeida
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University – UNESP, Araraquara, SP, Brazil
| | | | | | - Joatan Lucas de Sousa Gomes Costa
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University – UNESP, Araraquara, SP, Brazil
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais – UFMG, Belo Horizonte, MG, Brazil
| | - Andrea Abi Rached Dantas
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University – UNESP, Araraquara, SP, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University – UNESP, Araraquara, SP, Brazil
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Zaniboni JF, de Souza V, Escalante-Otárola WG, Leandrin TP, Fernández Godoy E, Besegato JF, Kuga MC. Cleaning and microstructural effects of amyl acetate on pulp chamber dentin impregnated with epoxy resin-based endodontic sealer. J ESTHET RESTOR DENT 2022; 34:1282-1289. [PMID: 36161756 DOI: 10.1111/jerd.12966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 08/22/2022] [Accepted: 09/02/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate the cleaning potential of 95% ethanol, acetone, and amyl acetate solutions used solely or in association, to remove epoxy resin-based sealer residues from pulp chamber dentin and their microstructural effects. MATERIALS AND METHODS One hundred and eighty bovine incisor specimens were divided into nine groups according to the cleaning protocol: ET (ethanol); AC (acetone); AA (amyl acetate); E1: AA+AC; E2: AA+ET; E3: AC+ET; E4: AA+AC+ET; PC (positive control), and NC (negative control). All groups were impregnated with epoxy resin-sealer, except NC. Ninety specimens were divided into groups (n = 10) for evaluation of persistence of residues and amount of open dentinal tubules by SEM analysis and evaluation of chemical compounds on the dentin surface after cleaning with electron dispersive spectroscopy. The others 90 specimens were submitted to Knoop microhardness evaluation. Persistence of residues data were submitted to the Kruskal Wallis and Dunn tests (α = 0.05). Open dentinal tubules and microhardness data were submitted to one-way ANOVA and Mann Whitney tests (α = 0.05). RESULTS AA and E4 protocols showed the lowest persistence of residues. E4 group had the highest incidence of open dentinal tubules. E3 and E4 groups showed no changes in the atomic ratio Ca/P, which was similar to NC group. E4 group did not present W, an element presents in all the other groups. ET and E4 protocols showed the smallest reduction in dentin microhardness. CONCLUSIONS The combination of amyl acetate, acetone and ethanol is the most effective and safe protocol to remove epoxy sealer residues on pulp chamber dentin. Moreover, it has the lowest microhardness reduction. CLINICAL SIGNIFICANCE The combined use of amyl acetate, acetone, and ethanol enhanced the cleaning of pulp chamber dentin with minimal microstructural damage.
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Affiliation(s)
- Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, Brazil
| | - Vitor de Souza
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, Brazil
| | | | - Thaís Piragine Leandrin
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, Brazil
| | - Eduardo Fernández Godoy
- Department of Restorative Dentistry, Universidad de Chile, Santiago, Chile.,Instituto de Ciencias Biomédicas, Universidad Autonoma de Chile, Santiago, Chile
| | | | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, Brazil
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Manzoli TM, Zaniboni JF, Besegato JF, Guiotti FA, Dantas AAR, Kuga MC. Bonding effects of cleaning protocols and time-point of acid etching on dentin impregnated with endodontic sealer. Restor Dent Endod 2022; 47:e21. [PMID: 35692228 PMCID: PMC9160758 DOI: 10.5395/rde.2022.47.e21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 10/07/2021] [Accepted: 10/21/2021] [Indexed: 11/11/2022] Open
Abstract
Objectives This study aimed to investigate the bonding effects of cleaning protocols on dentin impregnated with endodontic sealer residues using ethanol (E) or xylol (X). The effects of dentin acid etching immediately (I) or 7 days (P) after cleaning were also evaluated. For bonding to dentin, universal adhesive (Scotchbond Universal; 3M ESPE) was used. The persistence of sealer residues, hybrid layer formation and microshear bond strength were the performed analysis. Materials and Methods One hundred and twenty bovine dentin specimens were allocated into 4 groups (n = 10): G1 (E+I); G2 (X+I); G3 (E+P); and G4 (X+P). The persistence of sealer residues was evaluated by SEM. Confocal laser scanning microscopy images were taken to measure the formed hybrid layer using the Image J program. For microshear bond strength, 4 resin composite cylinders were placed over the dentin after the cleaning protocols. ANOVA followed by Tukey test and Kruskal-Wallis followed by Dunn test were used for parametric and non-parametric data, respectively (α = 5%). Results G2 and G4 groups showed a lower persistence of residues (p < 0.05) and thicker hybrid layer than the other groups (p < 0.05). No bond strength differences among all groups were observed (p > 0.05). Conclusions Dentin cleaning using xylol, regardless of the time-point of acid etching, provided lower persistence of residues over the surface and thicker hybrid layer. However, the bond strength of the universal adhesive system in etch-and-rinse strategy was not influenced by the cleaning protocols or time-point of acid etching.
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Affiliation(s)
- Tatiane Miranda Manzoli
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University – UNESP, Araraquara, SP, Brazil
| | - Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University – UNESP, Araraquara, SP, Brazil
| | - João Felipe Besegato
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University – UNESP, Araraquara, SP, Brazil
| | - Flávia Angélica Guiotti
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University – UNESP, Araraquara, SP, Brazil
| | - Andréa Abi Rached Dantas
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University – UNESP, Araraquara, SP, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University – UNESP, Araraquara, SP, Brazil
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Zaniboni JF, Besegato JF, Guiotti FA, Vitória MS, Lima RO, Kuga MC. Hybrid layer formation and bond strength to dentin impregnated with endodontic sealer after cleaning protocols. J Conserv Dent 2021; 24:179-183. [PMID: 34759586 PMCID: PMC8562836 DOI: 10.4103/jcd.jcd_14_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/18/2021] [Accepted: 05/23/2021] [Indexed: 11/10/2022] Open
Abstract
Aims: This study evaluated the hybrid layer formation and bond strength of two adhesive systems, Scotchbond Universal (U) or Adper Scotchbond Multi Purpose (M), after cleaning protocols using ethanol (E) or xylol (X), to dentin impregnated with an epoxy-resin based endodontic sealer. Settings and Design: The study design was an Experimental in vitro study. Methodology: One hundred bovine dentin specimens were randomly allocated into five groups (n = 10): Computed tomography (CT) (control): Only acid etching + M; E+U; X+U; E+M. After the specimen preparation, images were obtained using confocal laser scanning microscopy to evaluate the hybrid layer formation. For microshear bond strength test, the dentin specimens were included in polyvinyl chloride tubes and four resin composite cylinders were placed on the surface. The analysis was performed 24 h after storage. Statistical Analysis Used: For parametric and nonparametric data, analysis of variance followed by Tukey test and Kruskal–Wallis, followed by Dunn test were, respectively, used at a significance level of 5%. Results: Regarding hybrid layer formation, all experimental groups were similar to each other (P > 0.05). However, CT showed higher hybrid layer formation than other groups (P < 0.05), except in relation to X+M (P > 0.05). Bond strength was statistically similar among all groups (P > 0.05). Conclusions: Hybrid layer formation in dentin impregnated with epoxy resin-based sealer and submitted to different cleaning protocols was similar to the control group only for X+M. No differences were found among the experimental groups. Regarding the bond strength, no effect was observed for any group.
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Affiliation(s)
- Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - João Felipe Besegato
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Flávia Angelica Guiotti
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Matheus Sousa Vitória
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Reinaldo Oliveira Lima
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
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Morais JMP, Victorino KR, Escalante-Otárola WG, Jordão-Basso KCF, Palma-Dibb RG, Kuga MC. Effect of the calcium silicate-based sealer removal protocols and time-point of acid etching on the dentin adhesive interface. Microsc Res Tech 2018; 81:914-920. [DOI: 10.1002/jemt.23056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 04/23/2018] [Accepted: 05/01/2018] [Indexed: 11/11/2022]
Affiliation(s)
| | - Keli Regina Victorino
- Department of Restorative Dentistry; Araraquara Dental School, Univ Estadual Paulista (UNESP); Araraquara Brazil
| | | | | | - Regina Guenka Palma-Dibb
- Department of Restorative Dentistry; Ribeirão Preto Dental School, São Paulo University (USP); Ribeirão Preto Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry; Araraquara Dental School, Univ Estadual Paulista (UNESP); Araraquara Brazil
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Gonçalves Galoza MO, Fagundes Jordão-Basso KC, Escalante-Otárola WG, Victorino KR, Rached Dantas AA, Kuga MC. Effect of cleaning protocols on bond strength of etch-and-rinse adhesive system to dentin. J Conserv Dent 2018; 21:602-606. [PMID: 30546203 PMCID: PMC6249950 DOI: 10.4103/jcd.jcd_112_18] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Aim This study aimed to evaluate the cleaning protocol of dentin impregnated with epoxy resin-based sealer (AH Plus) and the effects on the adhesive interface using 95% ethanol (E) or formamide solution (F) associated with microabrasion with glass microparticles (M). Methodology Forty dentin specimens were impregnated with sealer (AH Plus). Specimens were cleansed according to the following protocols (n = 10): G1 (E); G2 (F); G3 (E = M); and G4 (F = M). No treatment was performed in G5 (control). Specimens were subjected to standard error of the mean to evaluate the residues persistence (×500) and open dentinal tubules counting (×2000). Another fifty specimens were subjected to similar procedures and cleaning protocols. Seven days later, composite-resin-made specimens were performed on dentin using etch-and-rinse adhesive system, then submitted to microshear test. Results G2 and G4 showed higher residues' persistence and lower incidence of open dentinal tubules than G1 and G3 (P < 0.05). No difference was found between G1 and G3 or G2 and G4 (P > 0.05). Adhesive system bond strength was similar in all groups (P > 0.05). Conclusions Microabrasion negatively affected the epoxy resin-based sealer residues' removal protocols' action; all groups presented residues on the dentin surface. However, 7 days later, the protocols did not affect the bond strength of adhesive system to sealer-impregnated dentin.
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Affiliation(s)
| | | | | | - Keli Regina Victorino
- Department of Restorative Dentistry, Araraquara School of Dentistry, Araraquara, São Paulo, Brazil
| | - Andrea Abi Rached Dantas
- Department of Restorative Dentistry, Araraquara School of Dentistry, Araraquara, São Paulo, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, Araraquara School of Dentistry, Araraquara, São Paulo, Brazil
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Jordão-Basso KCF, Kuga MC, Bandéca MC, Duarte MAH, Guiotti FA. Effect of the time-point of acid etching on the persistence of sealer residues after using different dental cleaning protocols. Braz Oral Res 2016; 30:e133. [PMID: 28001242 DOI: 10.1590/1807-3107bor-2016.vol30.0133] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 10/10/2016] [Indexed: 11/22/2022] Open
Abstract
Endodontic sealer residues remaining within the pulp chamber dentin after root canal obturation and cleaning with various solvents may compromise the appearance and the durability of dental restorations. Acid etching is routinely performed prior to application of dentine adhesive systems, but is effect on residual sealer material and the optimal time-point for performing etching, are unknown. Here, we evaluated the effect of acid etching on the dentin surface when performed either immediately or 7 days after removal of the endodontic sealer with two solvents, i.e., 95% ethanol or xylol. Forty crowns fragments from bovine incisors were impregnated with sealer and divided into 4 groups (n = 10 each), according to the dentin cleaning protocol and to the acid etching time-point: G1, 95.0% ethanol and immediate acid etching; G2, xylol and immediate acid etching; G3, 95.0% ethanol and acid etching after 7 days; and G4, xylol and acid etching after 7 days. Scanning electron microscopy (SEM) images (2000 ×) were obtained from each specimen and the number of open dentinal tubules counted and compared. Another 40 fragments were similarly prepared, and SEM images were obtained (500 ×) to score and compare the persistence of sealer residues on the dentin. G4 showed the most open dentinal tubules and the least epoxy resin-based sealer residues on the dentin surface (p < 0.05). The least epoxy resin-based sealer residues was obtained when acid etching, using 37% phosphoric acid, was performed after 7 days after cleaning the dentin with xylol.
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Affiliation(s)
| | - Milton Carlos Kuga
- Universidade Estadual Paulista - Unesp, Araraquara Dental School, Restorative Dentistry Department, Araraquara, SP, Brazil
| | | | - Marco Antonio Hungaro Duarte
- Universidade de São Paulo - USP, Bauru Dental School, Dental Material, Dentistry, and Endodontics Department, Bauru, SP, Brazil
| | - Flávia Angélica Guiotti
- Universidade Estadual Paulista - Unesp, Araraquara Dental School, Restorative Dentistry Department, Araraquara, SP, Brazil
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Bandeca MC, Kuga MC, Diniz AC, Jordão-Basso KC, Tonetto MR. Effects of the Residues from the Endodontic Sealers on the Longevity of Esthetic Restorations. J Contemp Dent Pract 2016; 17:615-617. [PMID: 27659075 DOI: 10.5005/jp-journals-10024-1899] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The substances used in the root canal treatment, especially sodium hypochlorite solution and oxidant agents, can negatively interfere on the bond strength of the adhesive systems to dentin and on the dental crowns fracture resistance.(1,2).
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Affiliation(s)
- Matheus C Bandeca
- Professor, Department of Postgraduate Program in Dentistry, CEUMA University, São Luis, Maranhão, Brazil, e-mail:
| | - Milton C Kuga
- Professor, Department of Restorative Dentistry, School of Dentistry, Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - Ana Cs Diniz
- Student, Department of Postgraduate Program in Dentistry, CEUMA University, São Luis, Maranhão, Brazil
| | - Keren Cf Jordão-Basso
- Student, Department of Postgraduate Program in Integrated Dental Science, University of Cuiabá, Mato Grosso, Brazil
| | - Mateus R Tonetto
- Professor, Department of Postgraduate Program in Integrated Dental Science, University of Cuiabá, Mato Grosso, Brazil
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