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Pengpue P, Sirimaharaj V, Chaijareenont P, Chinadet W. Tensile bond strength between paediatric prefabricated zirconia crowns and primary maxillary incisors when using various types of luting cements: an in vitro study. Eur Arch Paediatr Dent 2024:10.1007/s40368-024-00890-x. [PMID: 38607545 DOI: 10.1007/s40368-024-00890-x] [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: 04/03/2023] [Accepted: 02/21/2024] [Indexed: 04/13/2024]
Abstract
PURPOSE There is limited evidence regarding the most appropriate type of luting cement for paediatric prefabricated zirconia crowns (PZCs) in primary maxillary incisors. The retention of PZCs is dependent on the bond strength of luting cement between PZCs and primary maxillary incisors. The aim of this study was to evaluate the tensile bond strengths between PZCs and primary maxillary incisors with different types of luting cements. METHODS Thirty freshly extracted human primary maxillary incisors were prepared and randomly divided into three groups corresponding to three luting cements: bioactive cement, resin cement, and resin-modified glass ionomer cement (RMGIC), and then restored with PZCs. Tensile bond strengths were evaluated by a universal testing machine. The results were analysed using one-way ANOVA with Tukey's post-hoc test (p < 0.05). RESULTS The means of the tensile bond strengths were 1.43 ± 0.85 MPa, 0.91 ± 0.63 MPa, and 0.56 ± 0.39 MPa for the bioactive cement, resin cement, and RMGIC groups, respectively. A significant difference in tensile bond strength was observed between the bioactive cement and the RMGIC group (p < 0.05) but there was no significant difference in tensile bond strength between the resin cement group and the others. CONCLUSION Types of luting cement influenced the tensile bond strength between PZCs and primary maxillary incisors. The bioactive cement showed higher tensile bond strength than the resin cement and RMGIC.
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Affiliation(s)
- P Pengpue
- Division of Paediatric Dentistry Department of Orthodontics and Paediatric Dentistry Faculty of Dentistry, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - V Sirimaharaj
- Division of Paediatric Dentistry Department of Orthodontics and Paediatric Dentistry Faculty of Dentistry, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - P Chaijareenont
- Department of Prosthodontic Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - W Chinadet
- Division of Paediatric Dentistry Department of Orthodontics and Paediatric Dentistry Faculty of Dentistry, Chiang Mai University, Chiang Mai, 50200, Thailand.
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Abdel Sadek HM, Abdel Khalek AM, Wahsh MM. The effect of Er, Cr:YSGG laser debonding on the bond strength of two ceramic materials to dentin. BMC Oral Health 2023; 23:17. [PMID: 36635647 PMCID: PMC9835312 DOI: 10.1186/s12903-023-02721-9] [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: 07/02/2022] [Accepted: 01/05/2023] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES Evaluating the bond strength of two ceramic materials to dentin after Er,Cr:YSGG laser debonding. Would laser debonding affect the bond strength of ceramic to dentin? MATERIALS AND METHODS Recently extracted human molars were ground to expose dentin. Forty square shaped samples were prepared from CAD/CAM ceramic blocks. Samples were divided into two groups according to the type of ceramic material; group E: Lithium disilicate and group T: Ultra-translucent Zirconia (n = 20) Each group was divided into two subgroups (n = 10) according to the laser debonding effect (subgroup B: bonded samples, subgroup R: re-bonded samples after laser debonding). Ceramic samples were bonded to dentin using dual cure self-adhesive resin cement. Laser debonding of ceramic samples of subgroups R using Er, Cr:YSGG laser, were then re-bonded again to dentin surface with same resin cement. The Shear bond strength test using Universal testing machine was done. The failure mode was analyzed. Two-way analysis of variance was used to compare the mean bond strength and re-bond strength of two materials. The significance level was set at P ≤ 0.05. RESULTS Two-Way ANOVA showed that ceramic type had a significant effect on the re-bond strength to dentin. The predominant failure mode was adhesive. CONCLUSIONS Laser debonding of Lithium disilicate and Ultra translucent Zirconia decreased the re-bond strength to dentin. Deterioration in re-bond strength for Lithium disilicate ceramics was more pronounced than for Ultra translucent Zirconia. Clinical Relevance Deterioration in the bond strength between ceramics & dentin after laser debonding still needs improvement to allow its clinical use.
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Affiliation(s)
- Hoda M. Abdel Sadek
- grid.7269.a0000 0004 0621 1570Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Organization of African Unity St, El-Qobba Bridge, El Weili, Cairo, Egypt
| | - Ahmed M. Abdel Khalek
- grid.7269.a0000 0004 0621 1570Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Organization of African Unity St, El-Qobba Bridge, El Weili, Cairo, Egypt ,General Organization of Teaching Hospitals and Institues, Cairo, Egypt
| | - Marwa M. Wahsh
- grid.7269.a0000 0004 0621 1570Department of Fixed Prosthodontics, Faculty of Dentistry, Galala University, Ain Shams University, Cairo, Egypt
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Jitumori RT, Rodrigues RC, Reis A, Gomes JC, Gomes GM. Effect of dentin moisture on the adhesive properties of luting fiber posts using adhesive strategies. Braz Oral Res 2023; 37:e42. [PMID: 37132729 DOI: 10.1590/1807-3107bor-2023.vol37.0042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 10/07/2022] [Indexed: 05/04/2023] Open
Abstract
The purpose of this study was to evaluate the effect of dentin moisture (moist and dry) on the bonding of fiber posts to root dentin with different adhesive strategies (etch-and-rinse, self-etch, and self-adhesive). Seventy-two extracted single-rooted human teeth were endodontically treated and divided into six groups (n = 12) according to the moisture of dentin surface and adhesive systems as follows: a) etch-and-rinse/moist, b) etch-and-rinse/dry, c) self-etch/moist, d) self-etch/dry, e) self-adhesive/moist, and 6) self-adhesive/dry. The specimens were sectioned into six slices for push-out bond strength (BS), nanoleakage (NL) by SEM, and Vickers microhardness (VHN) of the resin cement. A universal testing machine (AG-I, Shimadzu Autograph) was used at a crosshead speed of 0.5 mm/min until post extrusion, with a load cell of 50 kg for evaluation of the push-out strength. Data on BS, NL, and VHN were evaluated by two-way ANOVA and Tukey's test (α = 0.05). Dentin moisture as the main factor was not significantly different for the push-out test. However, higher BS values can be observed for the etch-and-rinse group. A lower percentage of NL was found in the dry dentin groups. The moisture pattern was not significant in the hardness values for the pre-etching groups. Additional moisture did not increase the evaluated properties.
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Affiliation(s)
- Renata Terumi Jitumori
- Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Department of Restorative Dentistry, Ponta Grossa, PR, Brazil
| | - Rafaela Caroline Rodrigues
- Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Department of Restorative Dentistry, Ponta Grossa, PR, Brazil
| | - Alessandra Reis
- Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Department of Restorative Dentistry, Ponta Grossa, PR, Brazil
| | - João Carlos Gomes
- Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Department of Restorative Dentistry, Ponta Grossa, PR, Brazil
| | - Giovana Mongruel Gomes
- Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Department of Restorative Dentistry, Ponta Grossa, PR, Brazil
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Yildirim G, Demir C, Güven MÇ, Koç O, Dalkiliç EE. Influence of fiber insertion and different material type on stress distribution in endocrown restorations: a 3D-FEA study. Comput Methods Biomech Biomed Engin 2021; 25:1509-1519. [PMID: 34964689 DOI: 10.1080/10255842.2021.2019228] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The study aimed to evaluate the effects of fibers insertion and restorative material type on the stress distribution in endocrowns with finite element analysis. Five 3D models of first mandibular molars were created and restored as follows: (1) IN: intact tooth, (2) IPS-E: tooth restored with lithium disilicat ceramic endocrowns, (3) C-E: tooth restored with composite endocrowns, (4) IPS-E + F: lithium disilicate ceramic endocrowns + fiber, (5) C-E + F: composite endocrowns + fiber. Vertical masticatory load was imitated with finite element analysis. The equivalent stress of von Mises failure criterion (mvM) was calculated. The maximum mvM stress, enamel/crown, dentin and cement were compared among models and strength of the materials. Endocrowns presented a lower mvM stress level than intact tooth. In IPS-E, the mvM stress values in the crown and dentin were higher than C-E, while the mvM stress values in cement were higher in C-E group. Fibers insertion did not affect the stress level of IPS-E and C-E groups. In IPS model, fiber showed more stress absorption than C-E. The restorative material type changed the stress distribution of endocrown restorations. The fiber application did not affect the stress distribution in either endocrown group. But, more stress absorption was observed in fiber under IPS-E than C-E.
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Affiliation(s)
- Gulhan Yildirim
- Department of Prosthodontics, Beykent University, Istanbul, Turkey
| | - Cihan Demir
- Faculty of Mechanical Engineering, Yildiz Technical University, Istanbul, Turkey
| | | | - Osman Koç
- Faculty of Mechanical Engineering, Yildiz Technical University, Istanbul, Turkey
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Tribst JPM, Dal Piva AMDO, de Jager N, Bottino MA, de Kok P, Kleverlaan CJ. Full-Crown Versus Endocrown Approach: A 3D-Analysis of Both Restorations and the Effect of Ferrule and Restoration Material. J Prosthodont 2020; 30:335-344. [PMID: 32856743 DOI: 10.1111/jopr.13244] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/25/2020] [Indexed: 01/18/2023] Open
Abstract
PURPOSE To assess stress distribution in full-crowns with a composite buildup and endocrowns under axial or oblique loads, both with different ferrules (1 or 2 mm) and ceramic materials (glass ceramic or hybrid ceramic). MATERIALS AND METHODS Sixteen models were analyzed with finite element analysis. No-separation contacts were considered between restoration/resin cement and resin cement/tooth. The contact between the fixation cylinder and the root was considered perfectly bonded. The axial load was applied to the occlusal surface and the oblique load was applied to the buccal cusp. The resulting tensile stresses were shown for the crown, the cement layer and the tooth. RESULTS Almost all factors influenced the stress distribution significantly in the crown and the cement layer, as well as the tooth. The only exception was found under oblique loading by the restoration material and the type of crown that were of no significant influence on the stress distribution in the tooth. CONCLUSIONS Under axial load, the endocrown showed the least tensile stresses in the tooth, but under oblique loads, the full-crown showed less tensile stresses than the endocrown. With the hybrid ceramic material, lower stresses were found in the crown, but higher stresses were present in the cement layer. The 2 mm ferrule is beneficial for reducing the resulting tensile stresses in all modalities.
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Affiliation(s)
- João Paulo Mendes Tribst
- Department of Dental Materials and Prosthetics, São Paulo State University (UNESP), Institute of Science and Technology, São José dos Campos, Brazil
| | - Amanda Maria de Oliveira Dal Piva
- Department of Dental Materials and Prosthetics, São Paulo State University (UNESP), Institute of Science and Technology, São José dos Campos, Brazil
| | - Niek de Jager
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
| | - Marco Antonio Bottino
- Department of Dental Materials and Prosthetics, São Paulo State University (UNESP), Institute of Science and Technology, São José dos Campos, Brazil
| | - Paul de Kok
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
| | - Cornelis Johannes Kleverlaan
- Department of Dental Materials Science, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
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Moda MD, Fagundes TC, Briso ALF, dos Santos PH. Analysis of the bond interface between self-adhesive resin cement to eroded dentin in vitro. PLoS One 2018; 13:e0208024. [PMID: 30475892 PMCID: PMC6258132 DOI: 10.1371/journal.pone.0208024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 11/11/2018] [Indexed: 12/03/2022] Open
Abstract
The purpose of this study was to evaluate the bonding interface between a self-adhesive resin cement to in vitro eroded dentin. Seventy-two third molars were used and divided into two groups: sound dentin and in vitro eroded dentin. The in vitro erosion was performed following a demineralization protocol, in which the specimens were immersed in a demineralizing solution for 2 minutes per cycle and remineralizing solution for 10 minutes per cycle for 9 days. Both groups were submitted to four dentin surface treatments: control group (without any treatment), 2% chlorhexidine, 20% polyacrylic acid, and 0.1 M EDTA (n = 9). Blocks of resin-based composite were bonded with RelyX U200 self-adhesive resin cement applied on the pretreated dentin surfaces. The teeth were sectioned into beams (1mm2) and submitted to microtensile bond strength testing to evaluate the bond strength of self-adhesive resin cement to dentin after 24 hours and 8 months of immersion in artificial saliva. Three specimens of each group were longitudinally cut and evaluated using confocal laser scanning microscopy to analyze the dentin/cement interface. Eroded dentin showed higher bond strength values when compared to sound dentin for the 2% chlorhexidine group (p = 0.03), 24 hours after adhesion. When considering eroded dentin, the 0.1M EDTA group showed higher bond strength values with a statistically significant difference only for the control group (p = 0.002). After 8 months of storage, the present results showed that there was no statistically significant difference between the two substrates for all experimental groups (p>0.05). Analysis of the microscopy confocal showed different types of treatments performed on dentin generally increased tags formation when compared to the control group. The eroded dentin showed a significant increase in density and depth of resinous tags when compared to sound dentin. The storage of samples for 8 months seems to have not caused significant degradation of the adhesive interface.
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Affiliation(s)
- Mariana Dias Moda
- Department of Restorative Dentistry, Araçatuba Dental School, UNESP—São Paulo State University, Araçatuba, SP, Brazil
| | - Ticiane Cestari Fagundes
- Department of Restorative Dentistry, Araçatuba Dental School, UNESP—São Paulo State University, Araçatuba, SP, Brazil
| | - André Luiz Fraga Briso
- Department of Restorative Dentistry, Araçatuba Dental School, UNESP—São Paulo State University, Araçatuba, SP, Brazil
| | - Paulo Henrique dos Santos
- Department of Dental Materials and Prosthodontics, Araçatuba Dental School, UNESP–São Paulo State University, Araçatuba, SP, Brazil
- * E-mail:
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CAD-FEA modeling and analysis of different full crown monolithic restorations. Dent Mater 2018; 34:1342-1350. [DOI: 10.1016/j.dental.2018.06.024] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Revised: 05/09/2018] [Accepted: 06/07/2018] [Indexed: 11/21/2022]
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Almeida CMD, Meereis CTW, Leal FB, Ogliari AO, Piva E, Ogliari FA. Evaluation of long-term bond strength and selected properties of self-adhesive resin cements. Braz Oral Res 2018. [PMID: 29513888 DOI: 10.1590/1807-3107bor-2018.vol32.0015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This study evaluated the shear bond strength (SBS) of self-adhesive resin cements (SARCs) to dentin and their physical-chemical properties. Five commercial SARCs were evaluated [SmartCem®2 - DENTSPLY (SC2); BisCem® - Bisco (BC); SeT PP® - SDI (SeT); Relyx U100® - 3M ESPE (U100) and YCEM® SA - Yller (YCEM)]. The SARCs were evaluated for SBS to dentin (n = 10) after 24 h, 6 months, and 12 months. The dentin demineralization caused by acidic monomers was observed by SEM, and pH-neutralization of eluate was observed for 24 h. Degree of conversion (DC), rate of polymerization (Rp), flexural strength (FS), and elastic modulus (E) were evaluated. Immediate SBS of SC2, SET, U100, and YCEM were statistically higher than that of BC (p < 0.001). After 12 months, all SARCs showed reduced SBS values and U100 showed values similar to those of SET and YCEM, and higher than those of BC and SC2 (p = 0.001). Demineralization pattern of SARCs was similar. At 24h, all SARCs showed no differences in the pH-value, except BC and U100 (p < 0.001). YCEM showed the highest Rp. U100, YCEM, and SC2 showed statistically higher FS (p<0.001) and E (p < 0.001) when compared with SET and BC. U100 and YCEM showed the best long-term bonding irrespective of the storage period. A significant reduction in SBS was found for all groups after 12 months. SBS was not shown to be correlated with physical-chemical properties, and appeared to be material-dependent. The polymerization profile suggested that an increased time of light activation, longer than that recommended by manufacturers, would be necessary to optimize DC of SARCs.
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Affiliation(s)
| | | | - Fernanda Barbosa Leal
- Universidade Federal de Pelotas - UFPel, Undergraduate Program in Dentistry, Pelotas, SC, Brazil
| | - Aline Oliveira Ogliari
- Universidade Federal de Pelotas - UFPel, Undergraduate Program in Dentistry, Pelotas, SC, Brazil
| | - Evandro Piva
- Universidade Federal de Pelotas - UFPel, School of Dentistry, Department of Operative Dentistry, Pelotas, SC, Brasil
| | - Fabrício A Ogliari
- Universidade Federal de Pelotas - UFPel, Materials Engineering School, Department of Organic Chemistry, Pelotas, SC, Brasil
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Chiluka L, Shastry YM, Gupta N, Reddy KM, Prashanth NB, Sravanthi K. An In vitro Study to Evaluate the Effect of Eugenol-free and Eugenol-containing Temporary Cements on the Bond Strength of Resin Cement and Considering Time as a Factor. J Int Soc Prev Community Dent 2017; 7:202-207. [PMID: 28852637 PMCID: PMC5558255 DOI: 10.4103/jispcd.jispcd_138_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 06/12/2017] [Indexed: 11/26/2022] Open
Abstract
Aims and Objectives: The aim of this study was to assess the outcome of eugenol-free and eugenol-containing cements on the bond strength of resin cement. Materials and Methods: Dentin was exposed in five groups of extracted teeth (20 specimens each). In Group 1, specimens were not given temporary cementation. In Groups 2 and 3, specimens were given temporary restoration fixed with eugenol-free temporary cement for 7 and 14 days, respectively. In Groups 4 and 5, specimens were given temporary restoration fixed with eugenol-containing temporary cement for 7 and 14 days, respectively. Permanent cementation was done for all groups after specified period of time. Shear bond strength testing of specimens was carried under universal testing machine. The data were analyzed by SPSS for Windows (version 14) statistical package (SPSS Inc., Chicago, IL, USA). Results: One-way analysis of variance test revealed that Group 1 specimens produced higher shear bond strength than Groups 2, 3, 4, 5 and the difference was statistically significant (P < 0.001). In Groups 2, 3, 4, and 5, no significant difference in shear bond strength was observed between provisional restoration with eugenol-containing zinc oxide cement and provisional restoration with eugenol-free zinc oxide cement (P = 0.095). Conclusion: The findings of this in vitro experiment lend no support to the common opinion that eugenol-containing cements should be avoided as temporary cement.
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Affiliation(s)
- Lavanya Chiluka
- Consultant Prosthodontist and Implantologist, Sowjanya Dental Hospital, Hyderabad, Telangana, India
| | - Y Mahadev Shastry
- Department of Prosthodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India
| | - Nidhi Gupta
- Department of Prosthodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India
| | - K Mahendranadh Reddy
- Department of Prosthodontics, Sri Sai College of Dental Surgery, Vikarabad, Telangana, India
| | - N B Prashanth
- Department of Prosthodontics, SVS Institute of Dental Sciences, Mahabubnagar, Telangana, India
| | - K Sravanthi
- Consultant Prosthodontist and Implantologist, Sowjanya Dental Hospital, Hyderabad, Telangana, India
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Sekhri S, Mittal S, Garg S. Tensile Bond Strength of Self Adhesive Resin Cement After Various Surface Treatment of Enamel. J Clin Diagn Res 2016; 10:ZC01-4. [PMID: 26894165 DOI: 10.7860/jcdr/2016/13409.7026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Accepted: 10/15/2015] [Indexed: 11/24/2022]
Abstract
INTRODUCTION In self adhesive resin cements adhesion is achieved to dental surface without surface pre-treatment, and requires only single step application. This makes the luting procedure less technique-sensitive and decreases postoperative sensitivity. AIM The purpose of this study was to evaluate bond strength of self adhesive resin after surface treatment of enamel for bonding base metal alloy. MATERIALS AND METHODS On the labial surface of 64 central incisor rectangular base metal block of dimension 6 mm length, 5mm width and 1 mm height was cemented with RelyX U200 and Maxcem Elite self adhesive cements with and without surface treatment of enamel. Surface treatment of enamel was application of etchant, one step bonding agent and both. Tensile bond strength of specimen was measured with universal testing machine at a cross head speed of 1mm/min. RESULTS Least tensile bond strength (MPa) was in control group i.e. 1.33 (0.32) & 1.59 (0.299), Highest bond strength observed when enamel treated with both etchant and bonding agent i.e. 2.72 (0.43) & 2.97 (0.19) for Relyx U200 and Elite cement. When alone etchant and bonding agent were applied alone bond strength is 2.19 (0.18) & 2.24 (0.47) for Relyx U200, and 2.38 (0.27) 2.49 (0.16) for Max-cem elite. Mean bond strength was higher in case of Max-cem Elite as compared to RelyX U200 resin cement, although differences were non-significant (p > 0.05). CONCLUSION Surface treatment of enamel increases the bond strength of self adhesive resin cement.
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Affiliation(s)
- Sahil Sekhri
- PG Student, Department of Prosthodontics, Maharishi Markandey College of Dental Sciences and Research , Ambala, Haryana, India
| | - Sanjeev Mittal
- Professor, Department of Prosthodontics, Maharishi Markandey College of Dental sciences and Research , Ambala, Haryana, India
| | - Sandeep Garg
- Professor and Head, Department of Prosthodontics, Maharishi Markandey College of Dental Sciences and Research , Ambala, Haryana, India
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Okulus Z, Strzemiecka B, Czarnecka B, Buchwald T, Voelkel A. Surface energy of bovine dentin and enamel by means of inverse gas chromatography. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:382-389. [DOI: 10.1016/j.msec.2015.01.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 12/18/2014] [Accepted: 01/06/2015] [Indexed: 10/24/2022]
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Costa LA, Carneiro KK, Tanaka A, Lima DM, Bauer J. Evaluation of pH, ultimate tensile strength, and micro-shear bond strength of two self-adhesive resin cements. Braz Oral Res 2014; 28:1-7. [PMID: 25337932 DOI: 10.1590/1807-3107bor-2014.vol28.0055] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 06/24/2014] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to evaluate the pH, ultimate tensile strength (UTS), and micro-shear bond strength (µSBS) of two self-adhesive resin cements to enamel and dentin. Sound bovine incisors (n = 10) and two self-adhesive resin cements (i.e., RelyX U-100 and seT PP) were used. The pH of the resin cements was measured using a pH-indicator paper (n = 3). Specimens for UTS were obtained from an hourglass-shaped mold. For µSBS, cylinders with internal diameter of 0.75 mm and height of 0.5 mm were bonded to the flat enamel and dentin surfaces. Bonded cylinders were tested in the shear mode using a loop wire. The fracture mode was also evaluated. The cement seT PP showed a low pH; U-100 showed significantly higher UTS (49.9 ± 2.0) than seT PP (40.0 ± 2.1) (p < 0.05) and high µSBS to enamel (10.7 ± 3.7). The lowest µSBS was found for seT PP to dentin (0.7 ± 0.6); seT PP to enamel (4.8 ± 1.7), and for U-100 to dentin (7.2 ± 1.9), showing an intermediate µSBS value (p < 0.05). Adhesive failure was the most frequently observed failure mode. The resin cement that presented the lowest pH and UTS also presented the lowest micro-shear bond strength to enamel and dentin.
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Affiliation(s)
- Luciana Artioli Costa
- Department of Dentistry I, School of Dentistry, Universidade Federal do Maranhão, São Luis, MA, Brazil
| | - Karina Kato Carneiro
- Department of Dentistry I, School of Dentistry, Universidade Federal do Maranhão, São Luis, MA, Brazil
| | - Auro Tanaka
- Department of Chemistry, Center of Sciences and Technology, Universidade Federal do Maranhão, São Luis, MA, Brazil
| | - Darlon Martins Lima
- Department of Dentistry I, School of Dentistry, Universidade Federal do Maranhão, São Luis, MA, Brazil
| | - José Bauer
- Department of Dentistry I, School of Dentistry, Universidade Federal do Maranhão, São Luis, MA, Brazil
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