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Turini NK, Berger SB, Lopes MB, Silva RP, Contreras DP, Carvalho-Ferreira TDJ, Gonini-Júnior A, Guiraldo RD. Shelf life effects on the bond strength and microhardness of self-adhesive resin cements. J Clin Exp Dent 2024; 16:e562-e569. [PMID: 38988750 PMCID: PMC11231887 DOI: 10.4317/jced.61362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 03/26/2024] [Indexed: 07/12/2024] Open
Abstract
Background Among the main advantages of self-adhesive resin cements comprise good aesthetics, strong restoration-tooth bond and biocompatibility. However, some disadvantages, such as high viscosity level, color limitation and short shelf life should be mentioned. Thus, the aim of the current study was to assess bond strength between fiberglass post and root dentin in teeth subjected to self-adhesive resin cements with expired shelf life and hardness. Material and Methods Sixty (60) single-rooted human teeth were sectioned and divided into 2 groups of different cements: U200 3M and MaxCem Elite Kerr. Each group was divided into 3 subgroups, based on self-adhesive resin cements' shelf life, namely: Within the use-time recommended by the manufacturer or no expiration date; 6 months after opening the aluminum blister; 12 months after opening the aluminum blister. Bond strength was measured through push-out test conducted in universal testing machine; fracture pattern was analyzed, and microhardness was investigated through Knoop test, based on hardness readings. Data were subjected to Shapiro-Wilk normality test; nonparametric test was applied to hardness data, whereas parametric test was applied to bond strength data. Hardness data were subjected to Kruskal-Wallis test, whereas bond strength data were subjected to analysis of variance, which was followed by Tukey test; both tests were conducted at 5% significance level (α = 0.05). Results There was no statistically significant difference in knoop hardness values recorded for the material / time / root thirds combination (p=0.483). There was no statistically significant difference in bond strength values recorded for the Material / Time / Thirds combination (p=0.237). Conclusions It was possible concluding that shelf life did not influence material's hardness and bond strength. Key words:Dental cements, Resin Cements, Shelf Life of Products.
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Affiliation(s)
- Nayra-Kawana Turini
- Department of Restorative Dentistry, School of Dentistry, University Anhanguera -UNOPAR, Londrina, Paraná, Brazil
| | - Sandrine-Bittencourt Berger
- Department of Restorative Dentistry, School of Dentistry, University Anhanguera -UNOPAR, Londrina, Paraná, Brazil
- Department of Restorative Dentistry, School of Dentistry, University Anhanguera - Uniderp, Campo Grande, Mato Grosso do Sul, Brasil
| | - Murilo-Baena Lopes
- Department of Restorative Dentistry, School of Dentistry, University Anhanguera -UNOPAR, Londrina, Paraná, Brazil
- Department of Restorative Dentistry, School of Dentistry, University Anhanguera - Uniderp, Campo Grande, Mato Grosso do Sul, Brasil
| | - Ricardo-Petri Silva
- Department of Electrical Engineering, School of Electrical Engineering, State University of Londrina, Londrina, Paraná, Brazil
| | - Delise-Pellizzaro Contreras
- Department of Restorative Dentistry, School of Dentistry, State University of Londrina, Londrina, Paraná, Brazil
| | | | - Alcides Gonini-Júnior
- Department of Restorative Dentistry, School of Dentistry, State University of Londrina, Londrina, Paraná, Brazil
| | - Ricardo-Danil Guiraldo
- Department of Restorative Dentistry, School of Dentistry, University Anhanguera -UNOPAR, Londrina, Paraná, Brazil
- Department of Restorative Dentistry, School of Dentistry, University Anhanguera - Uniderp, Campo Grande, Mato Grosso do Sul, Brasil
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Emami Arjomand M, Nasoohi N, Shabani M. In Vitro Effects of Chlorhexidine and Isopropyl Alcohol Conditioning Agents on Immediate and Late Bond Strength of Fiber Posts Dentin. Front Dent 2024; 21:13. [PMID: 38919768 PMCID: PMC11196390 DOI: 10.18502/fid.v21i13.15374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 12/01/2023] [Indexed: 06/27/2024] Open
Abstract
Objectives: This study assessed the effect of chlorhexidine (CHX) and isopropyl alcohol (IA) on immediate and late pushout bond strength (PBS) of fiber posts to dentin. Materials and Methods: In this in vitro study, 54 single-canal premolars were endodontically treated, and randomly assigned to 3 groups (N=18) for root dentin conditioning with distilled water (control), 2% CHX, and 70% IA after post space preparation. Fiber posts were cemented with TheraCem self-adhesive cement, and each group was subdivided into two subgroups (N=9) for PBS measurement immediately after bonding, and after 5000 thermal cycles (5-55°C). The roots were then sectioned, and their PBS was measured. The mode of failure was evaluated under a stereomicroscope at ×40 magnification. Data were analyzed by repeated measures ANOVA and Tukey's test (alpha=0.05). Results: The highest PBS was noted in the IA group (21.12 MPa) after 24 hours and the lowest PBS belonged to the control group after thermocycling (7.48 MPa). The immediate and post-thermocycling PBS were significantly lower in the control group than the CHX group (P<0.05). The PBS in both the control and CHX groups was lower than that in the IA group (P<0.001). Regardless of the type of detergent, a significant reduction in PBS was observed after thermocycling (P<0.003). The PBS significantly decreased from the cervical towards the apical region in all groups (P<0.001). Conclusion: According to the results, application of IA before the self-adhesive cement effectively improved the immediate and late PBS, and was significantly more effective than CHX.
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Affiliation(s)
- Mansoureh Emami Arjomand
- Department of Operative Dentisrty, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Negin Nasoohi
- Department of Operative Dentisrty, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mohaddeseh Shabani
- Department of Operative Dentisrty, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Hoshino IAE, Dos Santos PH, Briso ALF, Sundfeld RH, Yamaguchi S, Rocha EP, Anchieta RB. Biomechanical performance of three fiberglass post cementation techniques: Imaging, in vitro, and in silico analysis. J Prosthodont Res 2023; 67:103-111. [PMID: 35264548 DOI: 10.2186/jpr.jpr_d_21_00253] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
PURPOSE The structural integrity of the resin cement layer, the bond strength, and the biomechanical behavior of different fiberglass post cementation techniques were evaluated. METHODS Thirty-three bovine incisors were divided into three groups (n = 11): conventional fiberglass post (CFP), conventional fiberglass post in flared root canals (CFL), and relined fiberglass post (RFP). Six specimens from each group were submitted for high-resolution microcomputed tomography (μCT) to evaluate the integrity and presence/volume of voids at the resin cement layer. Finite element analysis (FEA) of two three-dimensional (3D) models of each group were conducted, one considered ideal (without interface defects) and another containing the conditions identified in the μCT analysis. Push-out bond strength tests were conducted for all specimens. RESULTS The CFL group had the greatest mean values of void (Thirds cervical: 73.67; middle: 95.67; apical: 47.33) and gap concentration (Thirds cervical: 14.67; middle: 15.83; apical: 8.33) compared with CFP and RFP. A significant difference in bond strength was observed between the cervical (1.33 MPa) and middle thirds (1.85 MPa) compared with the apical third (4.85 MPa) of the CFL. A significant difference was observed in the bond strength in the CFL (1.33 MPa) and RFP (3.29 MPa) in the cervical third, which were statistically similar to the bond strength of the CFP. The tensile stress distributions were similar in most structures, localized in the cervical region on the lingual surface. CONCLUSIONS Structural defects in the interface layer might influence the bond strength and biomechanical behavior under the different fiberglass post cementations.
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Affiliation(s)
- Isis Almela Endo Hoshino
- Department of Preventive Dentistry and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - Paulo Henrique Dos Santos
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - Andre Luiz Fraga Briso
- Department of Preventive Dentistry and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - Renato Herman Sundfeld
- Department of Preventive Dentistry and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - Satoshi Yamaguchi
- Department of Biomaterials Science, Osaka University Graduate School of Dentistry, Suita, Osaka, Japan
| | - Eduardo Passos Rocha
- Department of Dental Materials and Prosthodontics, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil
| | - Rodolfo Bruniera Anchieta
- Department of Preventive Dentistry and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araçatuba, SP, Brazil.,Department of Prosthodontics, Centro Universitario do Norte Paulista- UNIPOS UNORP, São José do Rio Preto, SP, Brazil
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Küden C, Karakaş SN. Photodynamic therapy and gaseous ozone versus conventional post space treatment methods on the push-out bond strength of fiber posts luting with different resin cements. Photodiagnosis Photodyn Ther 2021; 36:102586. [PMID: 34670156 DOI: 10.1016/j.pdpdt.2021.102586] [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] [Received: 05/03/2021] [Revised: 10/06/2021] [Accepted: 10/12/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND The aim of this study was to compare the push-out bond strength of fiber posts by using two different resin cement after the treatments of post space with photodynamic therapy, gaseous ozone and conventional disinfection solution. METHODS The root canal treatments of one hundred maxillary incisors were performed. The roots were randomly distributed into 5 groups (n = 20). NaOCl of 2.5% + EDTA of 17% in group 1, CHX of 2% in group 2, toluidine blue + diode laser as the photodynamic therapy (PDT) in group 3 and ozone in group 4 were applied to the post spaces. Group 5 was washed with distilled water as control group. Each group was divided into two subgroups according to the adhesive types and the posts were bonded by using RelyX and LinkForce. The bond strength was calculated using the push-out test method. Resin tag formations were photographed with SEM. The push-out bond strength was analyzed by ANOVA and Tukey tests (p = .05). RESULTS The PDT group, which showed the highest PBS among the groups bonded with LinkForce at all levels, was significantly higher than Ozone and DW groups (p<.05). NaOCl and ozone treatments provided the highest PBS among the groups bonded with RelyX for all levels and this difference was significant according to the DW group (p < .05). CONCLUSION Post space treatments improved the bond strength of the fiber post in both types of resin cement.
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Affiliation(s)
- Cihan Küden
- Department of Endodontics, Faculty of Dentistry, Cukurova University, Adana, 01380, Turkey.
| | - Seda Nur Karakaş
- Department of Restorative Dentistry, Faculty of Dentistry, Cukurova University, Adana, 01380, Turkey.
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