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Gelio MB, Zaniboni JF, Monteiro J, Besegato JF, Pereira JR, Buchaim RL, Kuga MC. Medium-term evaluation of the bond strength and dentin penetration of self-adhesive resin cements to root dentin. Aust Dent J 2024; 69:93-101. [PMID: 37888911 DOI: 10.1111/adj.12988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/04/2023] [Indexed: 10/28/2023]
Abstract
BACKGROUND Medium-term evaluate the bond strength and tag formation in root dentin using self-adhesive cements Maxcem Elite (MCE), Relyx U200 (RU2), SeT PP (SPP) and Megalink (MGL) compared to conventional cement Relyx ARC (ARC) for glass fibre post cementation. MATERIALS AND METHODS One hundred bovine incisors roots were endodontically treated and divided into 5 groups (n = 20) according to the cementation system: MCE, RU2, SPP, MGL and ARC. All cementation systems were evaluated at 24 h (1) and 12 months (2) after post cementation. Specimens from the cervical, middle and apical thirds of the root were submitted to push-out bond strength test and confocal laser microscopy to verify the dentin penetration. The adhesive failure mode was classified as adhesive, cohesive and mixed. Data were analysed by one-way ANOVA and Tukey tests (α = 5%). RESULTS ARC-1 and ARC-12 showed the highest bond strength (P < 0.05). ARC showed the greatest tag extension, regardless of the third (P < 0.05). The most frequent failure mode in the 24-h analysis was cohesive, regardless of the cement used. For the 12-month analysis, mixed failure was the most frequent. CONCLUSION Conventional cement (ARC) showed the highest bond strength and tag extension, regardless of the evaluation period. In all cementation systems, the bond strength decreased after 12 months. © 2023 Australian Dental Association.
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Affiliation(s)
- M B Gelio
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - J F Zaniboni
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Jcc Monteiro
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - J F Besegato
- School of Dentistry (FAODO), Federal University of Mato Grosso do Sul (UFMS), Campo Grande, Mato Grosso, Brazil
| | - J R Pereira
- University of Southern Santa Catarina, Tubarão, Santa Catarina, Brazil
| | - R L Buchaim
- Department of Biological Sciences - Anatomy, Bauru School of Dentistry, Universidade de São Paulo - USP, São Paulo, Bauru, Brazil
| | - M C Kuga
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
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2
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Maiola EC, Boppré LM, Savaris JM, Dias Junior LCDL, Garcia LDFR, Teixeira CDS, Bortoluzzi EA. Did in-between rinsing and agitating with distilled water prevents precipitate formation by the interaction between sodium hypochlorite and chlorhexidine canal irrigants? Microsc Res Tech 2024; 87:315-325. [PMID: 37811954 DOI: 10.1002/jemt.24435] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/16/2023] [Accepted: 09/27/2023] [Indexed: 10/10/2023]
Abstract
The interaction of sodium hypochlorite (NaOCl) and chlorhexidine gluconate (CHX) produces an orange-brown precipitate. The present study evaluated the influence of distilled water (H2 O) in different irrigation protocols designed to prevent the formation of precipitate with NaOCl and CHX. Fifty canine teeth were instrumented and split longitudinally. The canal was examined with a stereomicroscope and photographed by canal-thirds. The tooth halves were repositioned and distributed randomly into five groups, according to the final irrigation protocol (n = 10): G1 (control)-Ethylenediaminetetraacetic acid (EDTA) + NaOCl + CHX, conventional irrigation (CI); G2-EDTA + NaOCl + CHX, activated with passive ultrasonic irrigation (PUI); G3-EDTA (PUI) + NaOCl (PUI) + H2 O (CI) + CHX (PUI); G4-EDTA + NaOCl + H2 O + CHX (PUI); G5-EDTA (PUI) + NaOCl (PUI) + H2 O (continuous ultrasonic irrigation [CUI]) + CHX (PUI). The specimens were evaluated with a stereomicroscope and scanning electron microscope (SEM). Energy dispersive x-ray spectroscopy analysis was performed to identify the elemental profile of the irrigated canal walls. The images were scored according to the extensiveness of precipitate. Data were analyzed (Kruskal-Wallis test, α = 5%). Under the stereomicroscope, G1 had significantly higher scores than all the other groups in all canal-thirds (p < .05). All four experimental groups showed similar scores (p > .05). There were no significant differences in precipitate formation among root-thirds in intragroup analysis (p > .05). Upon SEM examination, overall, only G5 had lower scores than G1 (p < .05). Analysis by canal-thirds showed no significant difference among groups and among canal-thirds in the intragroup analysis (p > .05). G1 showed high Cl peaks. In-between irrigation with H2 O activated by CUI is effective in preventing precipitate formation during canal debridement with NaOCl and CHX. RESEARCH HIGHLIGHTS: Continuous ultrasonic irrigation with distilled water was capable to prevent the precipitate formation. The precipitate can be classified as a chemical smear layer.
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Affiliation(s)
- Emanuelle Catherine Maiola
- Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil
| | - Letícia Mendes Boppré
- Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil
| | - Julia Menezes Savaris
- Postgraduate Program in Dentistry, Federal University of Santa Catarina, Florianopolis, Santa Catarina, Brazil
| | | | | | | | - Eduardo Antunes Bortoluzzi
- Department of Diagnosis & Oral Health, Division of Endodontics, University of Louisville, Louisville, Kentucky, USA
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3
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Costa JLDSG, Barros APO, Manzoli TM, Escalante-Otárola WG, Alencar CDM, Galvani LD, Vaz LG, Kuga MC. Formulations of NaOCl-based in liquid, gel form or with surfactants on dentin deproteinization before fiber post cementation. Dent Mater J 2024; 43:126-135. [PMID: 38072410 DOI: 10.4012/dmj.2023-187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
The objective of the study was to evaluate the effects of dentin deproteinization protocols for post space using different formulations containing sodium hypochlorite before fiber post cementation with self-adhesive resinous cement. The groups were divided according to the irrigation protocol (DWC, SHS, SHT and SHG). The residue cleanliness, bond strength, adhesive failure pattern, and tag formation at the adhesive interface between the self-adhesive cement and the dentin were evaluated. For this, analysis in scanning electron microscope, push-out test and confocal laser scanning microscopy were performed. The SHT protocol showed the highest residue cleanliness on the dentin surface of the post space (p<0.05). In addition, SHT protocol showed highest bond strength and tag formation in the cervical and middle thirds (p<0.05). Dentin deproteinization with sodium hypochlorite with surfactant provided the best dentin cleaning of residues, bond strength and tag formation after cementation of the fiber post with self-adhesive cement.
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Affiliation(s)
- Joatan Lucas de Sousa Gomes Costa
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais
- Department of Restorative Dentistry, Araraquara School of Dentistry, São Paulo State University
| | | | - Tatiane Miranda Manzoli
- Department of Restorative Dentistry, Araraquara School of Dentistry, São Paulo State University
| | | | | | - Lucas David Galvani
- Department of Restorative Dentistry, Araraquara School of Dentistry, São Paulo State University
| | - Luis Geraldo Vaz
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP)
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, Araraquara School of Dentistry, São Paulo State University
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4
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Boppré LM, Menezes Savaris J, Catherine Maiola E, Peressoni Vieira-Schuldt D, da Fonseca Roberti Garcia L, da Silveira Teixeira C, Antunes Bortoluzzi E. Can Heated Distilled Water Effectively Prevent Precipitate Formation between NaOCl and CHX? Int J Dent 2024; 2024:6612675. [PMID: 38222303 PMCID: PMC10787650 DOI: 10.1155/2024/6612675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 10/25/2023] [Accepted: 12/19/2023] [Indexed: 01/16/2024] Open
Abstract
Introduction The present study aimed to investigate the capacity of different irrigation protocols using heated distilled water at 65°C (HDW), in preventing the formation of the brown-orange precipitate observed after the interaction between sodium hypochlorite (NaOCl) and chlorhexidine (CHX). Methods Forty human canines were selected, prepared, and cleaved in two halves. Images of delimited areas in each root canal thirds were obtained through a stereomicroscope (16x and 40x). After reassembly, the teeth were distributed into four groups (n = 10) according to the final irrigation protocol: G1 (no HDW): EDTA + NaOCl + CHX with conventional irrigation (CI); G2 (HDW + CI): EDTA with passive ultrasonic irrigation (PUI) + NaOCl (PUI) + HDW (CI) + CHX (PUI); G3 (HDW + PUI): EDTA + NaOCl + HDW + CHX with PUI; G4 (HDW + CUI): EDTA (PUI) + NaOCl (PUI) + HDW with continuous ultrasonic irrigation (CUI) + CHX (PUI). After irrigation, the teeth were re-separated and images of the same delimited areas were obtained again. Scores were assigned according to the amount of precipitate observed, comparing the initial and final images. The data were submitted to Kruskal-Wallis, Dunn and Friedman statistical tests (α = 5%). Results G1(no HDW) showed the highest scores in the analysis between groups (p < 0.001), with a greater amount of precipitate in the cervical and medium thirds (p < 0.001). The thirds of the other experimental groups did not differ from each other (p > 0.05). Conclusion The intermediate irrigation with heated distilled water at 65°C prevented the formation of brown-orange precipitate, regardless of the use of ultrasonic activation (PUI or CUI).
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Affiliation(s)
- Letícia Mendes Boppré
- Department of Dentistry-Endodontics Division, Health Sciences Center, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Julia Menezes Savaris
- Department of Dentistry-Endodontics Division, Health Sciences Center, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Emanuelle Catherine Maiola
- Department of Dentistry-Endodontics Division, Health Sciences Center, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | | | - Lucas da Fonseca Roberti Garcia
- Department of Dentistry-Endodontics Division, Health Sciences Center, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Cleonice da Silveira Teixeira
- Department of Dentistry-Endodontics Division, Health Sciences Center, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Eduardo Antunes Bortoluzzi
- Department of Diagnosis and Oral Health, Division of Endodontics, University of Louisville, Louisville, KY, USA
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5
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Uçar AY, Kölüş T, Bozkurt DA, Neelakantan P, Ali IAA, Belli S. A laboratory investigation on the effect of biguanide- and pyridine-derived antiseptics on the adhesion of resin composites to dentin. AUST ENDOD J 2023; 49:599-605. [PMID: 37602727 DOI: 10.1111/aej.12791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 08/06/2023] [Accepted: 08/13/2023] [Indexed: 08/22/2023]
Abstract
Optimal bonding of adhesive restorations to dentin is crucial to prevent microleakage and enhance the survival of root-filled teeth. The aim of this study was to investigate the effect of chlorhexidine (CHX), alexidine (ALX) and octenidine dihydrochloride (OCT) on the bond strength of resin composites to coronal dentin. Human coronal dentin specimens were treated with 2% CHX, 0.1% ALX, 0.1% OCT or saline then restored with traditional or bulk-fill resin composites. The adhesion strength between the resin and dentin was measured using the microtensile bond strength and failure mode was determined using a stereomicroscope. Treatment with ALX and OCT resulted in significantly greater μTBS compared with CHX and saline, irrespective of the resin composite used. Alexidine treatment predominantly resulted in mixed failure, while adhesive failures were frequently observed in CHX and saline-treated dentin. In conclusion, final irrigation with ALX or OCT improved the bonding of resin composites to dentin.
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Affiliation(s)
- Arzu Yağmur Uçar
- Department of Endodontics, Faculty of Dentistry, Selçuk University, Konya, Turkey
| | - Türkay Kölüş
- Department of Restorative Dentistry, Faculty of Dentistry, Karamanoğlu Mehmetbey University Ahmet Keleşoğlu, Karaman, Turkey
| | - D Alperen Bozkurt
- Department of Endodontics, Faculty of Dentistry, Necmettin Erbakan University, Konya, Turkey
| | - Prasanna Neelakantan
- Divison of Restorative Dental Sciences, Discipline of Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR, Hong Kong
| | - Islam A A Ali
- School of Dentistry, Oregon Health & Science University, Portland, Oregon, USA
| | - Sema Belli
- Department of Endodontics, Faculty of Dentistry, Selçuk University, Konya, Turkey
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6
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Costa JLDSG, Manzoli TM, Besegato JF, Zaniboni JF, Oliveira ECGDE, Galvani LD, Dantas AAR, Vaz LG, Kuga MC. Effect of sodium hypochlorite-based formulations on the adhesion interface after fiber post cementation. Dent Mater J 2023; 42:878-885. [PMID: 37793825 DOI: 10.4012/dmj.2023-086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
The study evaluated the persistence of residues, bond strength and tags formation of a cementation system after post-space irrigation with different sodium hypochlorite-based irrigants. The groups were divided according to the irrigation protocol (DW: distilled water; SHS: sodium hypochlorite solution; SHG: sodium hypochlorite gel; and, SHT: sodium hypochlorite with surfactant). Forty roots (n=10) were used to evaluate the persistence of residues by scanning electron microscopy. Other forty roots were used to the push-out bond strength test, failure mode and tag formation analyses. Non-parametric data were submitted to Kruskal Wallis and Dunn tests, while parametric data were evaluated by one-way ANOVA. No difference was observed in the persistence of residues. DW showed the highest bond strength and tag formation. Type 2 failure mode was the most frequent in the experimental groups. Compared to control, SHT showed the best performance, since less negative effects on adhesive interface was observed.
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Affiliation(s)
| | - Tatiane Miranda Manzoli
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
| | | | - Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
| | | | - Lucas David Galvani
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
| | - Andréa Abi Rached Dantas
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
| | - Luis Geraldo Vaz
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP)
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP)
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7
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Elmallah S, Abdou A, Rizk A, Kusumasari C, Ashraf R. Effect of silver diamine fluoride activation on bond strength to root dentin. BMC Oral Health 2023; 23:733. [PMID: 37814251 PMCID: PMC10561427 DOI: 10.1186/s12903-023-03457-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 09/26/2023] [Indexed: 10/11/2023] Open
Abstract
BACKGROUND To investigate the effect of silver diamine fluoride (SDF) application and activation on the bond strength of gutta-percha to dentin and resin bonded post to dentin. METHODS Thirty-six human premolar teeth were used. The coronal part tooth was removed, and endodontic mechanical preparation was performed for all the teeth. The teeth were divided according to final rinse protocol (n = 9) as follows: Control group; no SDF application, SDF/NA; 38% SDF as a final rinse with no activation, SDF/MDA; 38% SDF as a final rinse with manual dynamic activation and SDF/US; 38% SDF as a final rinse with ultrasonic activation. Root canal obturation using lateral condensation technique followed by fiber post insertion after 48 h in the root canal after corresponding preparations. The roots were cut with a low-speed precision saw creating 2 mm thickness sections. A total of 4 sections were obtained from each tooth, 2 coronal specimens (with post) and 2 apical specimens (with Gutta percha). Each specimen was subjected to push-out bond strength test with a universal testing machine. Data were analyzed using two-way ANOVA. RESULTS The Push-out bond strength at the apical root section was significantly higher in SDF/MDA and SDF/US groups compared to control group. While for the coronal part, all SDF treated specimen showed reduced Push-out bond strength. CONCLUSION SDF application as final rinse may reduce the bonding performance between fiber post and dentine. Activation with manual and ultrasonic methods improved the bond strength at the apical root section.
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Affiliation(s)
- Sara Elmallah
- Department of Endodontics, Faculty of Dentistry, Fayoum University, Fayoum, Egypt.
| | - Ahmed Abdou
- Department of Prosthetic Dentistry, Biomaterials Division, Faculty of Dentistry, King Salman International University, El Tur, South Sinai, Egypt.
- Faculty of Dentistry, Al-Ayen University, Thi-Qar, Iraq.
| | - Amr Rizk
- Department of Prosthetic Dentistry, Fixed Prosthodontics Division, Faculty of Dentistry, King Salman International University, El Tur, South Sinai, Egypt
| | - Citra Kusumasari
- Department of Conservative Dentistry, Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia
| | - Reem Ashraf
- Department of Prosthetic Dentistry, Biomaterials Division, Faculty of Dentistry, King Salman International University, El Tur, South Sinai, Egypt
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8
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Alencar CDM, Zaniboni JF, Besegato JF, Barros APO, Gélio MB, Belizário LG, Godoy EMF, Kuga MC. Effect of irrigation acid solutions on cleaning and bond strength to post-space dentin. Eur J Oral Sci 2023; 131:e12939. [PMID: 37294053 DOI: 10.1111/eos.12939] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 05/25/2023] [Indexed: 06/10/2023]
Abstract
This study evaluated the effects of irrigating solutions containing 5% boric acid + 1% citric acid or 1% peracetic acid + high concentration hydrogen peroxide on root cleaning and bond strength of cementation systems after 24 h and 6 months of glass fiber post cementation. One hundred and twenty roots were endodontically treated. The specimens were randomized into one of four treatments (n = 10): DW (distilled water); NaOCl2.5% + EDTA17% (2.5% sodium hypochlorite solution + 17% EDTA); PA1% + HP (1% peracetic acid solution + high concentration of hydrogen peroxide); BA5% + CA1% (5% boric acid associated with 1% citric acid). The cleaning efficacy in the cervical, middle, and apical thirds of the post-space, and the push-out bond strength at 24 h and 6 months after post cementation were evaluated by Kruskal-Wallis and two-way ANOVA tests, respectively. BA5% + CA1% showed statistically significantly superior cleaning efficacy compared to the other solutions. This irrigation protocol also resulted in higher bond strength at 24 h and 6 months, regardless of the root third considered, and this was statistically significantly higher than those seen for DW and PA1% + HP. For BA5% + CA1% irrigation protocol, type 1 adhesive failure was the most prevalent. Post-space irrigation with BA5% + CA1% provided both higher cleaning efficacy and better bond strength.
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Affiliation(s)
- C de Melo Alencar
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - J Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - J Felipe Besegato
- School of Dentistry, Federal University of Mato Grosso do Sul (UFMS), Campo Grande, Mato Grosso do Sul, Brazil
| | - A Patricia Oliveira Barros
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - M Bena Gélio
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - L Garcia Belizário
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | | | - M Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
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9
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Drews DJ, Nguyen AD, Diederich A, Gernhardt CR. The Interaction of Two Widely Used Endodontic Irrigants, Chlorhexidine and Sodium Hypochlorite, and Its Impact on the Disinfection Protocol during Root Canal Treatment. Antibiotics (Basel) 2023; 12:antibiotics12030589. [PMID: 36978457 PMCID: PMC10044599 DOI: 10.3390/antibiotics12030589] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/09/2023] [Accepted: 03/09/2023] [Indexed: 03/18/2023] Open
Abstract
In recent years, sodium hypochlorite and chlorhexidine digluconate have been the gold standard of irrigation solutions utilized within the disinfection protocol during root canal treatments. Nowadays, it is known that, during chemical disinfection of the root canal, consecutive application of sodium hypochlorite and chlorhexidine digluconate leads to the formation of an orange-brown precipitate. This precipitate is described as being chemically similar to para-chloroaniline, which is suspected to have cytotoxic and carcinogenic effects. Concerns also exist regarding its influence on the leakage of root canal fillings, coronal restorations, and tooth discoloration. The purpose of this article is to review the literature on the interaction of sodium hypochlorite and chlorhexidine digluconate on the tooth and its surrounding tissues, and to discuss the effect of the precipitate formed during root canal treatment. We further address options to avoid the formation of the precipitate and describe alternative irrigation solutions that should not interact with sodium hypochlorite or chlorhexidine digluconate.
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Affiliation(s)
- Dirk-Joachim Drews
- Private Dental Practice, 69469 Weinheim, Germany
- University Outpatient Clinic for Conservative Dentistry and Periodontology, Martin-Luther-University Halle-Wittenberg, 06112 Halle, Germany
| | - Anh Duc Nguyen
- University Outpatient Clinic for Conservative Dentistry and Periodontology, Martin-Luther-University Halle-Wittenberg, 06112 Halle, Germany
| | - Antje Diederich
- University Outpatient Clinic for Conservative Dentistry and Periodontology, Martin-Luther-University Halle-Wittenberg, 06112 Halle, Germany
| | - Christian Ralf Gernhardt
- University Outpatient Clinic for Conservative Dentistry and Periodontology, Martin-Luther-University Halle-Wittenberg, 06112 Halle, Germany
- Correspondence: ; Tel.: +49-345-557-3741
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10
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Nogueira CHDP, Gelio MB, Besegato JF, Ramos ATPR, Fernández E, Kuga MC, Saad JRC. Effect of aging and cementation systems on the bond strength to root dentin after fiber post cementation. Braz Dent J 2023; 34:52-60. [PMID: 36888845 PMCID: PMC10027095 DOI: 10.1590/0103-6440202305082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 12/07/2022] [Indexed: 03/08/2023] Open
Abstract
This study evaluated the effect of aging and cementation of fiber posts using glass ionomer and resin cements on push-out bond strength, failure mode, and resin tag formation. One hundred and twenty bovine incisors were used. After post-space preparation, the specimens were randomly allocated into 12 groups (n = 10) according to the cementation system used: GC - GC Gold Label Luting & Lining); RL - RelyX Luting 2; MC - MaxCem Elite; RU - RelyX U200 and the aging periods (24 hours, 6 months, and 12 months). Slices from the cervical, middle, and apical thirds were obtained and analyzed by push-out bond strength test and confocal laser scanning microscopy. One-way ANOVA and Tukey's post-hoc test was used at a significance level of 5%. For the push-out bond strength test, no differences among GC, RU, and MC in the cervical and middle thirds were observed, regardless of the period of storage (P > 0.05). In the apical third, GC and RU showed similar bond strength but higher than other groups (P > 0.05). After 12 months, GC showed the highest bond strength (P < 0.05). Bond strength to post-space dentin decreased over time, regardless of the cementation system used. Cohesive failure was the most frequent, regardless of the period of storage, cementation system, and post-space third. Tag formation was similar among all groups. After 12 months, GC showed the highest bond strength values.
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Affiliation(s)
- Caio Henrique de Paula Nogueira
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Mariana Bena Gelio
- 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
| | - Anna Thereza Peroba Rezende Ramos
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Eduardo Fernández
- Department of Restorative Dentistry, University of Chile, Santiago,
Chile
- Institute of Biomedical Sciences, Autonomous University of Chile,
Providencia, Chile
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - José Roberto Cury Saad
- Department of Restorative Dentistry, School of Dentistry,
Araraquara, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
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11
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Gelio MB, Ramos ATPR, Zaniboni JF, Escalante-Otárola WG, Besegato JF, Kuga MC. Effect of irrigation protocols on chemical smear layer formation over the post-space dentin. Microsc Res Tech 2022; 85:3005-3013. [PMID: 35535716 DOI: 10.1002/jemt.24149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/10/2022] [Accepted: 05/01/2022] [Indexed: 11/12/2022]
Abstract
This study evaluated the effect of irrigation protocols using 95% ethanol (ET) or 1% peracetic acid (PA) prior the use of 2% chlorhexidine (CHX) compared to distilled water (DW) on the chemical smear layer (CSL) formation and incidence of open dentin tubules at the apical, medium, and cervical third of the post-space dentin. Scanning electron microscopy (SEM) and electron dispersive spectroscopy (EDS) images were used. Forty bovine roots were endodontically treated. After, post-space preparation was performed and the roots were randomized in four groups (n = 10) according to the irrigation protocol: DW, CHX, CHX-ET and CHX-PA. The chemical composition of CSL and the incidence of open dentin tubules at the post-space thirds were evaluated by EDS (500× magnification) and SEM (2000× magnification) images, respectively. Data from chemical composition of CSL were descriptively analyzed, while the incidence of open dentin tubules was evaluated by scores and submitted to Kruskal-Wallis and Dunn test (p = .05). Cl, Bi, and Si were the chemical elements most found over the dentin after the irrigation with CHX and CHX-ET. Moreover, CHX and CHX-ET showed the highest incidence of CSL (p < .05), but without difference between them (p > .05), regardless of the post-space third. DW and CHX-PA showed similar incidence of CSL (p > .05). No difference on the incidence of open dentin tubules was found for any irrigation protocol and post-space third (p > .05). The use of 1% PA prior the post-space irrigation with CHX decrease the incidence of CSL. RESEARCH HIGHLIGHTS: The post-space irrigation with chlorhexidine results in the formation of chemical smear layer. Ethanol is not capable to remove the chemical smear layer. Peracetic acid is more effective to remove the chemical smear layer.
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Affiliation(s)
- Mariana Bena Gelio
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | | | - Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | | | - João Felipe Besegato
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
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Castro-Núnez GM, Dos Santos JREV, Zaniboni JF, Escalante-Otárola WG, Porto TS, Kuga MC. Effect of mechanical cleaning protocols in the fiber post space on the adhesive interface between universal adhesive and root dentin. Microsc Res Tech 2022; 85:2131-2139. [PMID: 35141981 DOI: 10.1002/jemt.24071] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 01/07/2022] [Accepted: 01/21/2022] [Indexed: 11/10/2022]
Abstract
The aim of this study was to evaluate the effects of cleaning protocols on the presence of residues, open dentinal tubules, and bond strength of a self-etch adhesive plus a dual-cure resin cement to dentin in the fiber-post space. The methods for cleaning utilized were conventional irrigation (CI), rotary brush with continuous rotary movement (RB), and continuous ultrasonic irrigation (CUI). Sixty bovine incisors were used for fiber-post space preparation. Thirty roots were divided into three groups (n = 10) according to the cleaning protocols and submitted to scanning electron microscope to evaluate presence of residues and relative quantity of open dentinal tubules on dentin surface. Similar protocols were performed in the other thirty roots (n = 10) using a self-etching adhesive system (Scotchbond Universal) and a dual-cure resin cement (Relyx Unicem 2). After 6 months cervical, middle, and apical thirds sections of fiber-post space were submitted to push-out testing. To data ANOVA and Tukey's test were employed (α = 5%). RB and CUI showed the lowest presence of residues on dentin surface (p = .015) and the highest bond strength values (p < .001), regardless of the dentin third. CUI presented the highest quantity of open dentinal tubules in middle and apical thirds (p < .001). CI presented the lowest bond strength value of resin cement, regardless of dentin third (p < .001). Mechanical cleaning protocols, such as RB and CUI, presented better surface cleaning capabilities and higher bond strength than CI with dual-cure resin cement employed. The use of a mechanical cleaning protocol seems to cause appropriate condition on the root dentin surface. Mechanical cleaning of root dentin provided greater bond strength of the self-etching system with dual resin cement. Conventional irrigation did not provide adequate root dentin cleaning.
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Affiliation(s)
| | | | - Joissi Ferrari Zaniboni
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | | | - Thiago Soares Porto
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University, Araraquara, São Paulo, Brazil
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Leandrin TP, Fernández E, Lima RO, Besegato JF, Escalante-Otárola WG, Kuga MC. Customized Fiber Post Improves the Bond Strength and Dentinal Penetrability of Resin Cementation System to Root Dentin. Oper Dent 2021; 47:E22-E34. [PMID: 34969119 DOI: 10.2341/20-117-l] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/02/2021] [Indexed: 11/23/2022]
Abstract
OBJECTIVE This study aimed to evaluate the effect of fiber post customization on the bond strength (24 hours and 6 months), resin cement thickness, and dentinal penetrability of Adper Scotchbond Multi-Purpose - RelyX ARC (AS-RA), RelyX U200 (R2), and Scotchbond Universal - RelyX Ultimate (SU-RU) cementation systems to root dentin from the cervical-, middle-, and apical-thirds of the post space. METHODS One hundred twenty bovine incisors were endodontically treated. After post space preparation, the roots were divided into six groups, according to the luting protocols (AS-RA, R2, SU- RU) and the type of fiber post [noncustomized post (NC) and customized post (C)]. Customization procedures were peformed using a resin composite (Z350 XT). 24 hours (n=60) or 6 months later (n=60), specimens from the cervical-, middle-, and apical-thirds of the post space were submitted to cementation system thickness measurement, bond strength evaluation, and dentinal penetrability analysis with Confocal Laser Scanning Microscopy (CLSM). Failure mode was classified as adhesive, cohesive, or mixed. Data were submitted to ANOVA and Tukey tests (α=0.05). RESULTS Cementation protocols with customized fiber posts presented the lowest cementation system thickness, regardless of the cementation system or post space-third (p<0.05), and the highest bond strength values (p<0.05), regardless of the third space (p>0.05), for both periods (24 hours or 6 months). The comparison of push-out bond strength values between 24 hours and 6 months showed a reduction in all groups for the cervical-third (p<0.05). For the middle-third, only noncustomized groups showed reduction (p<0.05). For the apical-third, no reduction was observed (p>0.05). CONCLUSIONS Anatomical customization favored both the bond strength of cements to dentin and the dentinal penetrability, but with lower cementation system thickness, regardless of cement composition and adhesive strategy.
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Affiliation(s)
- T P Leandrin
- Thais Piragine Leandrin, DDS, MSc, PhD, Restorative Dentistry Department, Araraquara Dental School, Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - E Fernández
- *Eduardo Fernández, DDS, PhD, Professor Titular, Universidad de Chile Facultad de Odontologia, Santiago, Chile and Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Providencia, Santiago, Chile
| | - R O Lima
- Reinaldo Oliveira Lima, DDS, MSc, PhD, Restorative Dentistry Department, Araraquara Dental School, Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - J F Besegato
- João Felipe Besegato, DDS, MSc, PhD, Restorative Dentistry Department, Araraquara Dental School, Univ Estadual Paulista, Araraquara, São Paulo, Brazil
| | - W G Escalante-Otárola
- Wilfredo Gustavo Escalante-Otárola, DDS, MSc, PhD, NCCL Research Group, School of Dentistry, Faculty of Health Sciences, Jorge Basadre Grohmann National University-UNJBG, Tacna, Perú
| | - M C Kuga
- Milton Carlos Kuga, DDS, MSc, PhD, Restorative Dentistry Department, Araraquara Dental School, Univ Estadual Paulista, Araraquara, São Paulo, 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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Pedrinha VF, Alencar CDM, Jassé FFDA, Zaniboni JF, Dantas AAR, de Andrade FB, Kuga MC. Effect of the several epoxy resin-based sealer compositions on adhesion interface in radicular dentin after calcium hydroxide intracanal medication removal. J Clin Exp Dent 2021; 13:e913-e919. [PMID: 34603620 PMCID: PMC8464395 DOI: 10.4317/jced.58375] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 06/28/2021] [Indexed: 01/04/2023] Open
Abstract
Background This study evaluated the effects of several epoxy resin-based sealer compositions (AHP, AH Plus; ADS, Adseal; SPL, Sealer Plus) on bond strength and intratubular dentin penetration of the endodontic obturation, in root canal previously treated with calcium hydroxide intracanal medication (CH) and removed by continuous ultrasonic irrigation (CUI). Material and Methods Forty-five maxillary canines were prepared up to F5 (ProTaper system), filled with CH, coronally sealed, and stored at 37ºC. After 1 week, CH was removed using 2.5% sodium hypochlorite energized by CUI. The specimens were randomly distributed in three groups (n=15) and root canal obturated, according to epoxy-based resin sealer composition (AHP, ADS or SPL). The roots were transversally sectioned in cervical, middle, and apical thirds. In each radicular third, push out bond strength using universal machine and intratubular dentin using confocal laser scanning microscopy (CLSM) and Image J Program were evaluated. Bond strength and intratubular dentin penetration were statistically evaluated by ANOVA one-way and Tukey tests and Kruskal Wallis test, respectively (α = 0.05). Results In middle and apical thirds, AHP showed higher bond strength values (p<0.05), and ADS and SPL were similar each other (p>0.05). All epoxy resin-based sealers presented similar intratubular dentin penetration, independently of the radicular thirds (p>0.05). Cohesive and mixed failures were predominant in the cervical thirds. In the middle and apical thirds, AHP showed more cohesive type failures, while ADS and SPL showed more adhesive-type failures. Conclusions AHP has the highest bond strength in middle and apical radicular thirds, after calcium hydroxide intracanal medication removal using continuous ultrasonic irrigation, although intratubular dentin infiltration being similar among epoxy resin-based sealer with several chemical composition. Key words:Continuous ultrasonic irrigation, endodontic sealers, epoxy resin-based sealers, root canal obturation.
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Affiliation(s)
- Victor-Feliz Pedrinha
- Department of Restorative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo (USP), Bauru, SP, Brazil
| | - Cristiane-de Melo Alencar
- Department of Restorative Dentistry, Araraquara School of Dentistry, State University of São Paulo (UNESP), Araraquara, SP, Brazil
| | | | - Joissi-Ferrari Zaniboni
- Department of Restorative Dentistry, Araraquara School of Dentistry, State University of São Paulo (UNESP), Araraquara, SP, Brazil
| | - Andréa-Abi-Rached Dantas
- Department of Restorative Dentistry, Araraquara School of Dentistry, State University of São Paulo (UNESP), Araraquara, SP, Brazil
| | - Flaviana-Bombarda de Andrade
- Department of Restorative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo (USP), Bauru, SP, Brazil
| | - Milton-Carlos Kuga
- Department of Restorative Dentistry, Araraquara School of Dentistry, State University of São Paulo (UNESP), Araraquara, SP, Brazil
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Alberto APL, Oliveira DDS, Oliveira HE, Maciel ACDC, Belladonna FG, Silva EJNLD. Does sodium thiosulphate avoid the formation of the brown-coloured precipitate as an intermediate irrigant between NaOCl and chlorhexidine? AUST ENDOD J 2021; 48:72-76. [PMID: 34494676 DOI: 10.1111/aej.12562] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/26/2021] [Indexed: 11/29/2022]
Abstract
This study evaluated the efficacy of sodium thiosulphate (ST) as an intermediate irrigant between sodium hypochlorite (NaOCl) and chlorhexidine (CHX) to avoid the formation of the brown-coloured precipitate. The in vitro experiment used microtubes to test the mixture of 2.5% NaOCl, 2% CHX and 5% ST solutions, varying their order and time of addition. In the ex vivo experiment, 10 bovine teeth were divided into two groups according to the intermediate irrigant used: distilled water (control) and 5% ST (experimental). Colour change occurred in all microtubes after interaction between solutions. While the precipitate was not observed in the experimental group, it was seen in all specimens of the control group. The 5% ST was able to prevent the formation of the brown-coloured precipitate in the ex vivo experiment, whereas it only prevented its in vitro formation when the waiting time for adding CHX was 10, 15 and 20 min.
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Celik D, Ozalp Koca AT, Kosar T, Tasdemir T. The effects of final irrigants on the push-out bond strength of two calcium silicate-based root canal sealers: an in vitro study. Eur Oral Res 2021; 55:146-151. [PMID: 34746786 PMCID: PMC8547750 DOI: 10.26650/eor.2021922696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 04/17/2021] [Accepted: 05/01/2021] [Indexed: 11/23/2022] Open
Abstract
Purpose: The purpose of the present study was to investigate the effect of the different
irrigant combinations used in final irrigation on the push-out bond strength of root
canal sealers that have different compositions. Materials and methods: In total 60 dentinal slices in 1 mm thickness were collected from 15 extracted
mandibular premolar teeth; 4 slices from each tooth. 3 canal-like artificial cavities
were opened on each dentinal slice. Samples were divided into 4 experimental
groups, each of which consisted of 15 samples. In group 1, samples were immersed
in 5.25% NaOCl and 17% EDTA solutions respectively; in group 2, immersed in
5.25% NaOCl and 2% CHX solutions respectively; in group 3, immersed in 5.25%
NaOCl, 17% EDTA and 2% CHX solutions respectively; and in group 4 immersed
in distilled water. After drying with absorbent papers, each cavity in dentinal slice
sample was filled with different sealer (Endoseal MTA, Tech Biosealer Endo or AH
Plus). Two days later, the push-out bond examination was performed. Results: AH Plus showed higher push-out bond strength value in two combinations (group
2 and 3) in which final irrigants contained CHX (p<0.001). Dentinal push-out bond
strengths of root canal sealers from Endoseal MTA and Tech BioSealer Endo were
not affected by final irrigant (p=0.965). Conclusion: Using CHX after NaOCl in final irrigant increases push-out strength of epoxy resinbased
sealer but, did not create any difference in dentinal push-out bond strength
of calcium silicate-based sealers.
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Affiliation(s)
- Davut Celik
- Department of Endodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Ayse Tuba Ozalp Koca
- Department of Endodontics, Faculty of Dentistry, Bahcesehir University, IstanbulTurkey
| | - Tugba Kosar
- Department of Endodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Tamer Tasdemir
- Department of Endodontics, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
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Wilkoński W, Jamróz-Wilkońska L, Kępczyński M, Zapotoczny S, Maziarz U, Opiła J, Giardino L. The impact of irrigation protocols on epoxy sealer penetration depth in dentinal tubules. Study involving laser confocal microscopy. AUST ENDOD J 2021; 48:266-273. [PMID: 34390525 DOI: 10.1111/aej.12556] [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: 04/14/2021] [Revised: 07/01/2021] [Accepted: 08/02/2021] [Indexed: 11/29/2022]
Abstract
The aim was to assess the impact of irrigation protocols ended with ethanol or chlorhexidine on AH Plus penetration into dentinal tubules. 45 root canals were prepared to ISO 40/04, divided into three groups and irrigated with three protocols: Group 1 (control): 5.25% NaOCl; Group 2: 40% CA (citric acid), 5.25% NaOCl, 40% CA, water, ethanol; Group 3: 40% CA, 5.25% NaOCl, 40% CA, water, 2% chlorhexidine. Canals were filled using vertical condensation technique with gutta-percha and fluorescein-stained AH Plus sealer. After 72 h, 1 mm thick cross-sections were cut at 2, 5, 8 mm from the apex. Confocal laser microscope was used to measure the sealer penetration into dentinal tubules. Mean depth of sealer penetration (in micrometres) was 107, 131, 170 (Group 1); 146, 233, 317 (Group 2); 185, 301, 542 (Group 3); in apical, middle and coronal parts, respectively. Irrigation protocol ended with chlorhexidine resulted in the deeper sealer penetration compared with alcohol.
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Affiliation(s)
| | | | | | | | - Urszula Maziarz
- Faculty of Chemistry, Jagiellonian University, Kraków, Poland
| | - Janusz Opiła
- Faculty of Management of AGH University of Science and Technology, Kraków, Poland
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Alencar CM, Verbicário Dos Santos J, Jassé F, Dos Santos GO, Escalante-Otárola WG, Castro-Nuñez GM, de Campos EA, Kuga MC. Protocols for Mechanical Cleaning of the Post Space on the Bond Strength Between Root Dentin and Cementation System. Oper Dent 2021; 46:467-475. [PMID: 34847233 DOI: 10.2341/20-194-l] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/04/2020] [Indexed: 11/23/2022]
Abstract
OBJECTIVE To evaluate the effects of mechanical versus chemical cleaning protocols for cleaning the root dentin surface before cementation of fiberglass posts for their effect on the bond strength, failure mode, and dentinal penetration of the cementing agent using an etch-and-rinse adhesive system on dentin prepared to receive a fiberglass post. METHODS Forty roots of bovine teeth were endodontically treated and prepared for fiber post cementation. The specimens were randomized into 4 groups of 10: Control group (CO) - irrigation with 2.5% NaOCl; DW group- irrigation with distilled water; RB group - rotating brush for cleaning root canals, and CUI group - continuous ultrasonic irrigation. The fiberglass posts were cemented, and the specimens were immersed in distilled water for 6 months. A push-out test was performed on the cervical, middle, and apical thirds of the samples. Dentinal penetration of the cementing agent and the fracture pattern were evaluated by laser confocal microscopy. Statistical analysis was performed using analysis of variance (ANOVA) and post hoc Tukey tests (α=0.05). Results: The RB and CUI groups showed significantly higher bond strength values when compared to the Control and DW groups (p<0.05). In addition, in the control and DW groups, the apical third presented lower bond strength values when compared to middle and cervical thirds. CONCLUSION While DW showed the highest incidence of adhesive type failure, CUI resulted in the highest dentinal penetration of the cementing agent (p<0.05). RB and CUI resulted in the highest bond strength between cementation system and root dentin. In addition, CUI favored greater dentinal penetration of fiberglass post cementing agent.
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20
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Peroba Rezende Ramos AT, Fagundes Jordão-Basso KC, Porto TS, Kuga MC. Effect of irrigation protocol during post space preparation on the dentin adhesive interface: An in vitro study. J Prosthet Dent 2020; 125:324.e1-324.e9. [PMID: 33213888 DOI: 10.1016/j.prosdent.2020.09.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 09/09/2020] [Accepted: 09/10/2020] [Indexed: 01/04/2023]
Abstract
STATEMENT OF PROBLEM The post space must be prepared with techniques that do not interfere with the bond strength. These techniques are related to the availability of opened dentinal tubules and incidence of residue among the dentin, the adhesive, and the cement. Nevertheless, the effect of different irrigants during endodontic instrumentation is unclear. PURPOSE The purpose of this in vitro study was to assess the incidence of residue, the number of opened dentinal tubules, and the bond strength of the cementation system to root dentin of post space after 3 different irrigation protocols. MATERIAL AND METHODS The roots of bovine incisors were obturated, prepared to receive a fiber post, and divided into 3 groups as per the irrigation protocol: without irrigation, with alternating irrigation, and with continuous irrigation. Thirty roots (n=10) were evaluated by using scanning electron microscopy to assess the incidence of residue (×100 magnification) and the number of opened dentinal tubules (×2000 magnification). The fiber posts were cemented, and the remaining specimens (n=10) were subjected to pushout testing and failure mode evaluation. RESULTS All protocols presented a similar incidence of residue, regardless of the post space third (P>.05). The irrigation protocol without irrigation had the lowest number of opened dentinal tubules in the cervical and middle thirds (P<.05). The number of opened dentinal tubules was similar in all protocols in the apical third of the post space (P>.05). The irrigation protocol without irrigation had the lowest bond strength values in the cervical and middle thirds (P<.05). The irrigation protocol with continuous irrigation had the highest bond strength values in the apical third (P<.05). CONCLUSIONS Post space preparation without irrigation negatively affected the bond strength of the resin cementation system to root dentin.
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Affiliation(s)
| | | | - Thiago Soares Porto
- Assistant professor, Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, Ohio
| | - Milton Carlos Kuga
- Professor, Department of Restorative Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
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21
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Keine KC, Kuga MC, Tormin FBC, Venção AC, Duarte MAH, Chávez-Andrade GM, Faria G. Effect of peracetic acid used as single irrigant on the smear layer, adhesion, and penetrability of AH Plus. Braz Oral Res 2019; 33:e057. [PMID: 31365704 DOI: 10.1590/1807-3107bor-2019.vol33.0057] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 05/14/2019] [Indexed: 12/16/2022] Open
Abstract
The aim of this study was to evaluate the effect of peracetic acid (PAA) as a single irrigant on the smear layer, on the intraradicular dentinal bond strength, and on the penetrability of an epoxy-based resin sealer into the dentinal tubules. A total of 120 roots were distributed into 4 groups according to the irrigant used in root canal preparation: 1% PAA (PAA); 2.5% NaOCl followed by final irrigation with 17% EDTA and 2.5% NaOCl (NaOCl-EDTA-NaOCl); 2.5% NaOCl (NaOCl); and saline solution (SS). The smear layer was evaluated using scanning electron microscopy. The bond strength of an epoxy-based resin sealer (AH Plus) to root dentin was evaluated by the push-out test and penetrability of the sealer into dentinal tubules was observed by confocal laser microscopy. The results were analyzed by the Kruskal-Wallis and the Dunn post-test (α = 0.05). The use of 1% PAA as single root canal irrigant provided smear layer removal and improved the penetrability and bond strength of AH Plus to root dentin in a manner similar to that of the NaOCl-EDTA-NaOCl group (p > 0.05). The NaOCl and SS groups had higher values of smear layer and lower values of sealer penetrability and dentin bond strength than the PAA and NaOCl-EDTA-NaOCl groups (p < 0.05). Thus, 1% PAA has the potential to be used as a single irrigant in root canals.
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Affiliation(s)
- Katia Cristina Keine
- Department of Restorative Dentistry, UNESP - São Paulo State University, School of Dentistry, Araraquara, SP, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, UNESP - São Paulo State University, School of Dentistry, Araraquara, SP, Brazil
| | - Fernanda Borges Cunha Tormin
- Department of Restorative Dentistry, UNESP - São Paulo State University, School of Dentistry, Araraquara, SP, Brazil
| | - Ana Carolina Venção
- Department of Restorative Dentistry, UNESP - São Paulo State University, School of Dentistry, Araraquara, SP, Brazil
| | - Marco Antonio Hungaro Duarte
- Department of Restorative Dentistry, Dental Materials and Endodontics, University of São Paulo, School of Dentistry, Bauru, São Paulo
| | | | - Gisele Faria
- Department of Restorative Dentistry, UNESP - São Paulo State University, School of Dentistry, Araraquara, SP, Brazil
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22
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Belizário LG, Kuga MC, Hungaro Duarte MA, Só MVR, Keine KC, Pereira JR. Effect of fiber post space irrigation with different peracetic acid formulations on the bond strength and penetration into the dentinal tubules of self-etching resin cement. J Prosthet Dent 2019; 122:46.e1-46.e7. [PMID: 31182239 DOI: 10.1016/j.prosdent.2019.03.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 03/28/2019] [Accepted: 03/28/2019] [Indexed: 11/15/2022]
Abstract
STATEMENT OF PROBLEM The post space must be irrigated with solutions that do not interfere with the bond strength and enhance penetration into the dentinal tubules of self-etching resin cement. Which solution is best is unclear. Peracetic acid with different formulations appears to be a good option. PURPOSE The purpose of this in vitro study was to evaluate the effect of irrigating the fiber post space by using 1% peracetic acid (PA) at low (LH) or high (HH) hydrogen peroxide concentration on the bond strength and penetration into the dentinal tubules of RelyX U200 self-etching resin cement. MATERIAL AND METHODS After intraroot preparation for fiber posts in 60 endodontically treated teeth, the specimens were divided into 4 groups (n=15) according to the irrigation protocol: CG (control), distilled water; NA (NaOCl), 2.5% sodium hypochlorite; LHPA, PA with a low concentration of hydrogen peroxide; and HHPA, PA with a high concentration of hydrogen peroxide. The fiber posts were then cemented with self-etching resin cement labeled with rhodamine. Cross sections of the thirds were obtained by confocal scanning microscopy and submitted to the push-out and cement penetration tests. The data obtained in the push-out tests were evaluated by using ANOVA and the Tukey post hoc test, and those data obtained in the confocal screening were evaluated by using the Kruskal-Wallis and Dunn (Bonferroni correction) tests (α=.05). RESULTS Bond strength values in the cervical third of the CG were higher than those in NA (P=.035) but similar to those of the other groups (P=.05). In the other thirds, CG and LHPA values were similar to one another (P=.05) but higher than those of NA and HHPA (P<.001). The penetration rate assessed by confocal scanning microscopy revealed similar results in the cervical third for all groups (P=.075), except for NA which provided the lowest penetration. In the remaining thirds, CG and LHPA provided the highest penetration rate (P=.015). CONCLUSIONS The LHPA group had no negative effects on the bond strength and penetration into the dentinal tubules of the self-etching resin cement.
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Affiliation(s)
- Lauriê Garcia Belizário
- Doctoral student, Restorative Dentistry Department, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Milton Carlos Kuga
- Associate Professor, Restorative Dentistry Department, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Marco Antônio Hungaro Duarte
- Associate Professor, Department of Dentistry, Endodontic and Dental Materials, Bauru Dental School, São Paulo University (USP), Bauru, Brazil
| | - Marcus Vinicius Reis Só
- Associate Professor, Restorative Dentistry Department, Dental School, Rio Grande do Sul Federal University (UFRGS), Rio Grande do Sul, Brazil
| | - Kátia Cristina Keine
- Doctoral student, Restorative Dentistry Department, Araraquara Dental School, São Paulo State University (UNESP), Araraquara, Brazil
| | - Jefferson Ricardo Pereira
- Associate Professor, Postgraduate Program in Health Sciences, University of Southern Santa Catarina (UNISUL), Santa Catarina, Brazil.
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Lorenzetti CC, Bortolatto JF, Ramos ATPR, Shinohara AL, Saad JRC, Kuga MC. The effectiveness of glass ionomer cement as a fiber post cementation system in endodontically treated teeth. Microsc Res Tech 2019; 82:1191-1197. [PMID: 30920097 DOI: 10.1002/jemt.23268] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/19/2019] [Accepted: 03/11/2019] [Indexed: 11/10/2022]
Abstract
This study compared the performance of a glass ionomer (GC Gold Label 1, GIC) as a fiber post cementation system for glass fiber posts with a self-adhesive resin cement (Relyx U200, RUC) and a conventional resin cement system (Scotchbond Muli-Purpose and Relyx ARC, RAC). Thirty endodontically treated canines were randomly divided in three groups (n = 10), according to the fiber post cementation system: (RAC)-Scotchbond Multi-Purpose and Relyx X ARC; (RUC)-Relyx U200 and (GIC)-GC Gold Label 1 Luting & Lining. Rhodamine was incorporated into the cementation system prior to the fiber post cementation. After glass fiber post cementation, roots were incubated in artificial saliva for 6 months. After that, specimens from the cervical, middle, and apical thirds of the post space were prepared and analyzed using a push-out bond strength test and confocal laser microscopy. ANOVA one way and Tukey tests showed that GIC and RUC demonstrated similar push-out bond strength values, independently of the post space third (p > .05); however, values were greater than those shown by RAC (p < .05). For dentin penetrability, GIC and RUC also had similar results (p > 0.05) and lower than RAC (p < 0.05). Inside the root canal, the cementation system using glass ionomer cement (GC Gold Label 1 Luting & Lining) has similar push-out bond strength to the self-adhesive resin cement (Relyx U200) and these were higher than the conventional resin (Relyx ARC), despite its higher dentin penetrability.
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Affiliation(s)
- Camila C Lorenzetti
- Department of Restorative Dentistry, Araraquara School of Dentistry, University of Sao Paulo State, Araraquara, Brazil
| | | | - Anna T P R Ramos
- Department of Restorative Dentistry, Araraquara School of Dentistry, University of Sao Paulo State, Araraquara, Brazil
| | - André L Shinohara
- Department of Biological Sciences, Bauru Dental School, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Jose R C Saad
- Department of Restorative Dentistry, Araraquara School of Dentistry, University of Sao Paulo State, Araraquara, Brazil
| | - Milton C Kuga
- Department of Restorative Dentistry, Araraquara School of Dentistry, University of Sao Paulo State, Araraquara, Brazil
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Ramos ATPR, Belizário LG, Jordão-Basso KCF, Shinohara AL, Kuga MC. Effects of photodynamic therapy on the adhesive interface using two fiber posts cementation systems. Photodiagnosis Photodyn Ther 2018; 24:136-141. [DOI: 10.1016/j.pdpdt.2018.08.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 08/13/2018] [Accepted: 08/27/2018] [Indexed: 12/28/2022]
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25
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Tartari T, Wichnieski C, Bachmann L, Jafelicci M, Silva RM, Letra A, van der Hoeven R, Duarte MAH, Bramante CM. Effect of the combination of several irrigants on dentine surface properties, adsorption of chlorhexidine and adhesion of microorganisms to dentine. Int Endod J 2018; 51:1420-1433. [DOI: 10.1111/iej.12960] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 05/30/2018] [Indexed: 11/28/2022]
Affiliation(s)
- T. Tartari
- Department of Operative Dentistry, Endodontics, and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru SP Brazil
| | - C. Wichnieski
- Department of Endodontics; Pontifical Catholic University of Paraná; Curitiba PR Brazil
| | - L. Bachmann
- Department of Physics; Faculty of Philosophy, Science and Literature of Ribeirão Preto; University of São Paulo; Ribeirão Preto SP Brazil
| | - M. Jafelicci
- Department of Physical Chemistry; Institute of Chemistry; São Paulo State University; Araraquara SP Brazil
| | - R. M. Silva
- Department of Endodontics; School of Dentistry; University of Texas Health Science Center at Houston; Houston TX USA
| | - A. Letra
- Department of Endodontics; School of Dentistry; University of Texas Health Science Center at Houston; Houston TX USA
- Department of Diagnostic and Biomedical Sciences; School of Dentistry; University of Texas Health Science Center at Houston; Houston TX USA
| | - R. van der Hoeven
- Department of Diagnostic and Biomedical Sciences; School of Dentistry; University of Texas Health Science Center at Houston; Houston TX USA
| | - M. A. H. Duarte
- Department of Operative Dentistry, Endodontics, and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru SP Brazil
| | - C. M. Bramante
- Department of Operative Dentistry, Endodontics, and Dental Materials; Bauru School of Dentistry; University of São Paulo; Bauru SP Brazil
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26
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Belizário LG, Kuga MC, Castro-Núñez GM, Escalante-Otárola WG, Só MVR, Pereira JR. Effects of different peracetic acid formulations on post space radicular dentin. J Prosthet Dent 2018; 120:92-98. [PMID: 29310877 DOI: 10.1016/j.prosdent.2017.08.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 08/01/2017] [Accepted: 08/02/2017] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM The optimal irrigating solution with antimicrobial and dentin cleansing properties for post space preparation for fiber posts is unclear. Peracetic acid is one option but is available in various chemical formulations that require evaluation. PURPOSE The purpose of this in vitro study was to evaluate dentin surface cleanliness based on the presence of a smear layer and the number of open dentin tubules. It also investigates the chemical composition of residues after canal irrigation with a 1% peracetic acid solution (PA) at low or high concentration of hydrogen peroxide during the preparation of intracanal fiber posts. MATERIAL AND METHODS After filling the root canals of 40 mandibular incisors, a rotary instrument was used for intracanal preparation to place fiber posts. The teeth were divided into 4 groups (n=10) according to the post space irrigation protocol as follows: CG (control): distilled water; NA (NaOCl): 2.5% sodium hypochlorite; LH: PA with low concentration of hydrogen peroxide; and HH: PA with high concentrations of hydrogen peroxide. After irrigation, the teeth were sectioned, and the intracanal dentin surface was subjected to analysis using energy dispersive spectroscopy to evaluate chemical composition and to scanning electron microscopy (×500) to evaluate the presence of the smear layer. The number of open dentin tubules was measured by scanning electron microscopy analysis (×2000) using photo-editing software. ANOVA and the Tukey test (α=.05) were used to evaluate the data, except for the presence of a smear layer, for which the Kruskal-Wallis and Dunn tests were used (α=.05). RESULTS The highest concentrations of oxygen in the dentin residues were detected in LH and HH (P<.05); CG and NA showed similar oxygen concentrations (P>.05). NA had a higher concentration of chlorine (P<.05), whereas LH had a lower amount of smear layer and a larger number of open dentin tubules than the other groups (P<.05). These were equivalent to each other (P>.05), except for HH, which also had a larger number of open dentin tubules than CG and NA (P<.05). CONCLUSIONS PA 1% with a low concentration of hydrogen peroxide yielded a lower amount of smear layer and a larger number of open dentin tubules in the dentin of the post space when compared with PA 1% with a high concentration of hydrogen peroxide, despite maintaining a similar oxygen concentration in these dentin residues.
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Affiliation(s)
- Lauriê Garcia Belizário
- Doctoral student, Restorative Dentistry Department, Araraquara Dental School, São Paulo State University, São Paulo, Brazil
| | - Milton Carlos Kuga
- Associate Professor, Restorative Dentistry Department, Araraquara Dental School, São Paulo State University, São Paulo, Brazil
| | - Gabriela Mariana Castro-Núñez
- Doctoral student, Restorative Dentistry Department, Araraquara Dental School, São Paulo State University, São Paulo, Brazil
| | | | - Marcus Vinicius Reis Só
- Associate Professor, Restorative Dentistry Department, Dental School, Rio Grande do Sul Federal University, Rio Grande do Sul, Brazil
| | - Jefferson Ricardo Pereira
- Associate Professor, Postgraduate Program in Health Sciences, University of Southern Santa Catarina, Santa Catarina, Brazil.
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Ramos ATPR, Garcia Belizário L, Venção AC, Fagundes Jordão-Basso KC, de Souza Rastelli AN, de Andrade MF, Kuga MC. Effects of Photodynamic Therapy on the Adhesive Interface of Fiber Posts Cementation Protocols. J Endod 2018; 44:173-178. [DOI: 10.1016/j.joen.2017.08.035] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/08/2017] [Accepted: 08/28/2017] [Indexed: 12/27/2022]
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Chromographic Analysis and Cytotoxic Effects of Chlorhexidine and Sodium Hypochlorite Reaction Mixtures. J Endod 2017; 43:1545-1552. [DOI: 10.1016/j.joen.2017.04.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/28/2017] [Accepted: 04/17/2017] [Indexed: 11/21/2022]
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29
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Silva CC, Ferreira VMD, De-Deus G, Herrera DR, Prado MD, Silva EJNLD. Effect of Intermediate Flush Using Different Devices to Prevent Chemical Smear Layer Formation. Braz Dent J 2017; 28:447-452. [PMID: 29160396 DOI: 10.1590/0103-6440201701438] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Accepted: 05/02/2017] [Indexed: 11/21/2022] Open
Abstract
This study compared the effect of intermediate flush with distilled water delivered by conventional irrigation, EndoVac microcannula or Self-Adjusting File (SAF) system in the prevention of chemical smear layer (CSL) formation. Thirty human premolars were used. Canals were prepared with Reciproc system and 5.25% NaOCl. After chemomechanical preparation, samples were divided in 3 groups (n=10) according to the intermediate irrigation protocol with distilled water using: conventional irrigation, EndoVac microcannula or SAF. A final flush with 2% chlorhexidine solution was used and scanning electron microscopy was performed to assess protocol effectiveness. Two calibrated evaluators attributed scores according the presence or absence of CSL on the surface of the root canal walls at the coronal, middle and apical thirds, as follows: (1) no CSL; (2) small amounts of CSL; (3) moderate CSL; and (4) heavy CSL. Differences between protocols were analyzed with Kruskal-Wallis and Mann-Whitney U tests. Friedman and Wilcoxon signed rank tests were used for comparison between each root canal third. SAF resulted in less formation of CSL when compared with the conventional irrigation and EndoVac microcannula (p<0.05). When root canal thirds were analyzed, conventional irrigation and EndoVac groups showed less CSL formation at coronal and middle thirds in comparison to the apical third (p<0.05). In SAF group, there was no difference among the thirds (p>0.05). It may be concluded that an intermediate flush of distilled water, delivered by the SAF system resulted in a better reduction of CSL formation during chemomechanical preparation.
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Affiliation(s)
- Camilla Corrêa Silva
- Department of Endodontics, School of Dentistry, UNIGRANRIO - Universidade do Grande Rio, Duque de Caxias, RJ, Brazil
| | - Vivian Maria Durange Ferreira
- Department of Endodontics, School of Dentistry, UNIGRANRIO - Universidade do Grande Rio, Duque de Caxias, RJ, Brazil
| | - Gustavo De-Deus
- Department of Endodontics, Fluminense Federal University, Niterói, RJ, Brazil
| | - Daniel Rodrigo Herrera
- Department of Endodontics, Piracicaba School of Dentistry, UNICAMP - Universidade Estadual de Campinas, Piracicaba, SP, Brazil
| | - Maíra do Prado
- Department of Endodontics, Piracicaba School of Dentistry, UNICAMP - Universidade Estadual de Campinas, Piracicaba, SP, Brazil
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30
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Guneser MB, Dincer AN, Arslan D. Comparison of Conventional Syringe, CanalBrush, EndoActivator, Photon-Induced Photoacoustic Streaming, and Manual Instrumentation in Removing Orange-Brown Precipitate: An In Vitro Study. Photomed Laser Surg 2017; 35:311-316. [PMID: 28186862 DOI: 10.1089/pho.2016.4248] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE The aim of this in vitro study was to compare the various techniques for removing precipitate formed after irrigation with sodium hypochlorite (NaOCl) and chlorhexidine (CHX). BACKGROUND DATA It is still unclear whether different irrigant activation systems can effectively remove precipitate that is firmly attached to the root canal walls. METHODS Eighty-two extracted single-rooted human teeth were instrumented by using the ProTaper rotary system. The roots were irrigated with 5% NaOCl and then 2% CHX to form orange-brown precipitate on the root canal walls. The teeth were sectioned longitudinally, and the amount of precipitate on the canal walls was measured under a stereomicroscope at 15 × magnification before the root halves were reassembled. Then, conventional syringe irrigation (CSI), CanalBrush (CB), EndoActivator (EA) system, photon-induced photoacoustic streaming (PIPS), and manual instrumentation (MI) techniques were used to remove the precipitate, during which 5 mL of distilled water was used for 1 min. The amount of precipitate remaining on the canal walls was measured, and the percentage of precipitate removed was calculated. Data were analyzed by using the Kruskal-Wallis and Mann-Whitney U tests (p = 0.05). RESULTS All experimental groups contained residual precipitate. The precipitate was more effectively removed in the MI group than in the other groups (p < 0.05). The CB and EA groups showed better removal than the CSI and PIPS groups (p < 0.05), and there were no significant differences in removal between these latter two groups (p > 0.05). CONCLUSIONS None of the techniques used was able to completely remove the orange-brown precipitate from the root canal surfaces.
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Affiliation(s)
- Mehmet Burak Guneser
- Department of Endodontics, Faculty of Dentistry, Bezmialem Vakif University , Istanbul, Turkey
| | - Asiye Nur Dincer
- Department of Endodontics, Faculty of Dentistry, Bezmialem Vakif University , Istanbul, Turkey
| | - Dilara Arslan
- Department of Endodontics, Faculty of Dentistry, Bezmialem Vakif University , Istanbul, Turkey
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31
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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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32
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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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JORDÃO-BASSO KCF, KUGA MC, DANTAS AAR, TONETTO MR, LIMA SNL, BANDÉCA MC. Effects of alpha-tocopherol on fracture resistance after endodontic treatment, bleaching and restoration. Braz Oral Res 2016; 30:S1806-83242016000100258. [DOI: 10.1590/1807-3107bor-2016.vol30.0069] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/06/2016] [Indexed: 11/22/2022] Open
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Collares FM, Portella FF, Rodrigues SB, Celeste RK, Leitune VCB, Samuel SMW. The influence of methodological variables on the push-out resistance to dislodgement of root filling materials: a meta-regression analysis. Int Endod J 2015; 49:836-849. [DOI: 10.1111/iej.12539] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 08/26/2015] [Indexed: 12/30/2022]
Affiliation(s)
- F. M. Collares
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - F. F. Portella
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - S. B. Rodrigues
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - R. K. Celeste
- Preventive and Social Dentistry Department; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - V. C. B. Leitune
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
| | - S. M. W. Samuel
- Dental Materials Laboratory; School of Dentistry; Federal University of Rio Grande do Sul; Porto Alegre Brazil
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Vouzara T, Koulaouzidou E, Ziouti F, Economides N. Combined and independent cytotoxicity of sodium hypochlorite, ethylenediaminetetraacetic acid and chlorhexidine. Int Endod J 2015; 49:764-73. [DOI: 10.1111/iej.12517] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 07/29/2015] [Indexed: 11/29/2022]
Affiliation(s)
- T. Vouzara
- Department of Endodontology and Department of Operative Dentistry; School of Dentistry; Aristotle University of Thessaloniki; Thessaloniki Greece
| | - E. Koulaouzidou
- Department of Endodontology and Department of Operative Dentistry; School of Dentistry; Aristotle University of Thessaloniki; Thessaloniki Greece
| | - F. Ziouti
- Department of Endodontology and Department of Operative Dentistry; School of Dentistry; Aristotle University of Thessaloniki; Thessaloniki Greece
| | - N. Economides
- Department of Endodontology and Department of Operative Dentistry; School of Dentistry; Aristotle University of Thessaloniki; Thessaloniki Greece
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36
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Suman JM, Kuga MC, Da Rosa RA, Santini MF, Grazziotin-Soares R, Montagner F, Só MVR. Antibacterial activity of chlorhexidine after final irrigation with ethanol: CLSM and culture-based method analysis. Microsc Res Tech 2015; 78:682-7. [PMID: 26138134 DOI: 10.1002/jemt.22525] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 04/30/2015] [Accepted: 05/01/2015] [Indexed: 11/07/2022]
Abstract
This study investigated the effect of 95% ethanol on the antibacterial properties of 2% chlorexidine (CHX) over monospecies biofilm (Enterococcus faecalis) through a culture-based method, and over multispecies biofilm using confocal laser scanning microscopy (CLSM). For monospecies model, E. faecalis biofilm was induced in 40 root canals. The irrigation procedures were: S-saline solution; S/CHX-saline solution + CHX; E-ethanol; and E/CHX-ethanol + CHX. Microbial sampling was performed at three periods: before (S1), immediately after (S2), and 72 h after the final flush (S3). For multispecies biofilm model, 28 sterilized bovine dentin blocks were fixed on a removable orthodontic device to allow intraoral biofilm development. Seven samples were used in each group. Statistical analysis was carried out by using the Kruskal-Wallis test and Dunn's test for multiple comparisons. There was a significant reduction in CFUs count immediately after the final flush (S2) in all experimental groups (P < 0.05). However, only S/CHX, E and E/CHX groups had CFU counts close to zero, without differences among them (P > 0.05). After 72h (S3), the S/CHX and E/CHX groups had CFU counts near zero (P > 0.05). The CFU count increased in S3 for S and E groups (P < 0.05). CLSM showed that the percentages of remaining live cells were similar in S/CHX, E, and E/CHX groups (P > 0.05). The S group had the highest percentage of live cells (P < 0.05). The 95% ethanol did not interfere in the antibacterial properties of 2% CHX over mono- and multispecies biofilms.
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Affiliation(s)
- Juliana Martins Suman
- Department of Conservative Dentistry, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Milton Carlos Kuga
- Department of Restorative Dentistry, Araraquara Dental School, São Paulo State University, Araraquara, São Paulo, Brazil
| | - Ricardo Abreu Da Rosa
- Department of Conservative Dentistry, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Manuela Favarin Santini
- Department of Conservative Dentistry, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Renata Grazziotin-Soares
- Department of Conservative Dentistry, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Francisco Montagner
- Department of Conservative Dentistry, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Marcus ViníCius Reis Só
- Department of Conservative Dentistry, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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37
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Leal F, Simão RA, Fidel SR, Fidel RAS, do Prado M. Effect of final irrigation protocols on push-out bond strength of an epoxy resin root canal sealer to dentin. AUST ENDOD J 2015; 41:135-9. [DOI: 10.1111/aej.12114] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fernanda Leal
- Department of Endodontics; UERJ - State University of Rio de Janeiro; Rio de Janeiro Brazil
| | - Renata Antoun Simão
- Department of Metallurgic and Materials Engineering; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | - Sandra Rivera Fidel
- Department of Endodontics; UERJ - State University of Rio de Janeiro; Rio de Janeiro Brazil
| | | | - Maíra do Prado
- Department of Metallurgic and Materials Engineering; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
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38
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Arslan H, Uygun AD, Keskin A, Karatas E, Seçkin F, Yıldırım A. Evaluation of orange-brown precipitate formed in root canals after irrigation with chlorhexidine and QMix and spectroscopic analysis of precipitates produced by a mixture of chlorhexidine/NaOCl and QMix/NaOCl. Int Endod J 2015; 48:1199-203. [PMID: 25557836 DOI: 10.1111/iej.12427] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Accepted: 12/23/2014] [Indexed: 11/30/2022]
Affiliation(s)
- H. Arslan
- Department of Endodontics; Faculty of Dentistry; Ataturk University; Erzurum Turkey
| | - A. D. Uygun
- Department of Endodontics; Faculty of Dentistry; Ataturk University; Erzurum Turkey
| | - A. Keskin
- Department of Chemistry; Faculty of Science; Ataturk University; Erzurum Turkey
| | - E. Karatas
- Department of Endodontics; Faculty of Dentistry; Ataturk University; Erzurum Turkey
| | - F. Seçkin
- Department of Endodontics; Faculty of Dentistry; Ataturk University; Erzurum Turkey
| | - A. Yıldırım
- Department of Chemistry; Faculty of Science; Ataturk University; Erzurum Turkey
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