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Başol EU, Vallittu PK, Lassila LVJ, Cekic Nagas I. Effect of bioactive glass particles on mechanical and adhesion properties of resin cements. J Prosthodont Res 2024; 68:105-113. [PMID: 37164657 DOI: 10.2186/jpr.jpr_d_22_00314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
PURPOSE The aim of this study is to evaluate the mechanical and adhesive properties of three different resin cements with bioactive glass (BAG) incorporated in two different ratios. METHODS BAG was added to different resin cements (3M Rely-X Ultimate, GC Link Ace, and GC Link Force) in different ratios (5% and 10% by weight). The three-point flexural strength, microhardness, and bond strength properties were evaluated. The fracture types of the groups were then analyzed using a stereo microscope. The data were analyzed using a multifactorial analysis of variance and Tukey's post-hoc tests (α < 0.05). RESULTS The addition of BAG reduced the flexural strength of the resin cements (P < 0.05).The effect of BAG addition on the Vickers microhardness value was significantly different for each cement group (P < 0.05). In addition, with the exception of the GC link force group (10% BAG addition), the BAG addition decreased the bond strength of cements to dentin in all the groups (P = 0.171). CONCLUSIONS The results of this study confirmed that different resin cements comprising different ratios of BAG exhibited different flexural strength, hardness, and bond-strength properties. Since the bond strength values increased with the addition of 10% BAG in the GC Link Force cement group, the effects of different BAG compositions could be worth investigating in future studies.
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Affiliation(s)
- Ece Ucar Başol
- Gazi University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Türkiye
| | - Pekka Kalevi Vallittu
- University of Turku, Institute of Dentistry, Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Turku, Finland
| | - Lippo Veli Juhana Lassila
- University of Turku, Institute of Dentistry, Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Turku, Finland
| | - Isil Cekic Nagas
- Gazi University, Faculty of Dentistry, Department of Prosthodontics, Ankara, Türkiye
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Swathy RS, Naidu J. A Comparative Evaluation of Shear Bond Strength of Embrace Wetbond TM Pit and Fissure Sealant with or without the Use of a Universal Dental Adhesive System [Scotchbond TM Universal Adhesive] Using Different Bonding Protocols: A Multiparametric In Vitro Study. Int J Clin Pediatr Dent 2023; 16:48-53. [PMID: 37020754 PMCID: PMC10067991 DOI: 10.5005/jp-journals-10005-2500] [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] [Indexed: 04/07/2023] Open
Abstract
Aim To evaluate and compare the shear bond strength (SBS) of Embrace WetBondTM (EWS) Pit and Fissure Sealant (PF sealants) with or without the use of a universal dental adhesive system ScotchbondTM Universal Adhesive (SBU) using different bonding and curing protocols and to assess and compare the mode of failure as determined by visualization of the fractured surfaces of the test specimens after shear testing under an optical microscope at a magnification of 20×. Materials and methods A total of 85 samples were prepared for testing SBS on enamel on caries-free, extracted permanent human molars. The specimens were randomly divided into five groups based on different bonding and curing protocols. A knife-edge blade in a universal testing machine was used to perform the SBS test with a crosshead speed of 1 mm/minute. Then the mode of failure was assessed. Statistical analysis Results were analyzed using a one-way analysis of variance with Tukey's post hoc test and Chi-squared test. A probability value 0.05 (p ≤ 0.01) was regarded as significant. Results ScotchbondTM Universal Adhesive (SBU) in total-etch (TE) mode/etch-and-rinse (ER) mode with individual light curing of the sealant and adhesive showed the highest SBS to enamel (5.40 ± 2.51 MPa). A predominance of cohesive mode of failure was observed for all the test groups. Conclusion Embrace WetBondTM (EWS) PF sealants with SBU in the ER mode of application, with either curing mode, can be used as an alternative to a conventional technique for sealant placement for improving interfacial bond strength to enhance sealant retention and efficacy. Clinical significance Embrace WetBondTM (EWS) PF sealants with SBU in the ER mode of application can be used as an alternative to a conventional technique for sealant placement for improving interfacial bond strength. How to cite this article Swathy SR, Naidu J. A Comparative Evaluation of Shear Bond Strength of Embrace WetbondTM Pit and Fissure Sealant with or without the Use of a Universal Dental Adhesive System [ScotchbondTM Universal Adhesive] Using Different Bonding Protocols: A Multiparametric In Vitro Study. Int J Clin Pediatr Dent 2023;16(1):48-53.
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Affiliation(s)
- RS Swathy
- Department of Pediatric and Preventive Dentistry, Thiruvananthapuram, Kerala, India
| | - Jaya Naidu
- Department of Pediatric and Preventive Dentistry, Vydehi Institute of Dental Sciences and Research Centre, Bengaluru, Karnataka, India
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Aljamhan AS, Alrefeai MH, Alhabdan A, Alzehiri MH, Naseem M, Vohra F, Alkhudhairy F. Interaction of zirconium oxide nanoparticle infiltrated resin adhesive with dentin conditioned by phosphoric acid and Er, Cr: YSGG laser. J Appl Biomater Funct Mater 2022; 20:22808000221087349. [PMID: 36475913 DOI: 10.1177/22808000221087349] [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] [Indexed: 12/13/2022] Open
Abstract
The aim was to prepare experimental adhesive (EA) with ZrO2 nanoparticles (ZEA) and without it; and its interaction with dentin conditioned with photodynamic therapy (PDT), etch and rinse, and Er, Cr: YSGG laser (ECL). Methods consisted of the scanning electron microscope (SEM), energy dispersive X-ray (EDX), shear bond strength (SBS) failure mode, and rheological property analysis. The methods were employed to assess bond integrity; the shape of ZrO2 NPs and interfacial dentin and adhesive interaction. Ninety premolar teeth were collected and pre-bonding, conditioning of dentin was performed utilizing phosphoric acid (H3PO4), photodynamic therapy (PDT), and ER-CR-YSGG laser (ECL). The teeth were set to form bonded specimens using two adhesives EA and ZEA. The microscopic imagery of ZrO2 revealed irregular-shaped, non-edged particles. EDX analysis revealed Zr to be 75.7% whereas, O2 by weight was 25.3%. The highest SBS was demonstrated in dentin conditioned with etch and rinse and ZEA (19.05 ± 0.13 MPa). Whereas, the lowest SBS was observed in dentin surface treated with PDT and EA (12.25 ± 0.14 MPa). Most of the reported failure modes were adhesive. Rheological analysis revealed that with increasing frequencies the viscosities of adhesives were reduced. The presence of 10% ZrO by weight in adhesive improves SBS of restoration and this improvement in bond values is statistically significant compared to EA. Bond values may be influenced by surface treatment of dentin.
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Affiliation(s)
- Abdullah S Aljamhan
- Restorative Dental Sciences Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Mohammad H Alrefeai
- Restorative Dental Sciences Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Alhanouf Alhabdan
- Restorative Dental Sciences Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | | | - Mustafa Naseem
- Department of Community and Preventive Dentistry, Dow International Dental College, Karachi, Pakistan
| | - Fahim Vohra
- Department of Prosthetic Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
| | - Fahad Alkhudhairy
- Restorative Dental Sciences Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
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Sano H, Chowdhury AFMA, Saikaew P, Matsumoto M, Hoshika S, Yamauti M. The microtensile bond strength test: Its historical background and application to bond testing. JAPANESE DENTAL SCIENCE REVIEW 2020; 56:24-31. [PMID: 31827652 PMCID: PMC6888711 DOI: 10.1016/j.jdsr.2019.10.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 10/20/2019] [Indexed: 11/29/2022] Open
Abstract
Microtensile bond strength (μTBS) test was introduced in 1994. Since then, it has been utilized profoundly across many bond strength testing laboratories, making it currently one of the most standard and versatile bond strength test. Although it is a static and strength-based method, together with the morphological and spectroscopic investigations, it has been contributing immensely in the advancement of dentin adhesive systems. μTBS test has a greater discriminative capability than the traditional macro-shear bond test. During the early stage of its development, the authors predicted that this testing method would enable evaluation of the adhesive performances of resins to excavated carious or sclerotic dentin and the regional bond strengths of various portions of the cavity. In addition, they also stated the possibility of comparing the long-term stability of resin adhesion at various portions of the cavity walls on teeth extracted at various times after insertion of bonded restorations. In this review, we discussed the historical background, inception and the application of the μTBS test and proposed directions for further improvement of this testing method.
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Affiliation(s)
- Hidehiko Sano
- Department of Restorative Dentistry, Faculty of Dentistry, Hokkaido University Graduate School of Dental Medicine, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
| | - Abu Faem Mohammad Almas Chowdhury
- Department of Restorative Dentistry, Faculty of Dentistry, Hokkaido University Graduate School of Dental Medicine, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
| | - Pipop Saikaew
- Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University, 6 Yothi Road, Rajthewee, Bangkok 10400, Thailand
| | - Mariko Matsumoto
- Department of Restorative Dentistry, Faculty of Dentistry, Hokkaido University Graduate School of Dental Medicine, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
| | - Shuhei Hoshika
- Department of Restorative Dentistry, Faculty of Dentistry, Hokkaido University Graduate School of Dental Medicine, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
| | - Monica Yamauti
- Department of Restorative Dentistry, Faculty of Dentistry, Hokkaido University Graduate School of Dental Medicine, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan
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Sinjari B, Santilli M, D’Addazio G, Rexhepi I, Gigante A, Caputi S, Traini T. Influence of Dentine Pre-Treatment by Sandblasting with Aluminum Oxide in Adhesive Restorations. An In Vitro Study. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E3026. [PMID: 32645819 PMCID: PMC7372407 DOI: 10.3390/ma13133026] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/20/2020] [Accepted: 07/03/2020] [Indexed: 01/22/2023]
Abstract
Dentine pretreatment through sandblasting procedures has been widely studied but no curve test results are currently available. Thus, the aim herein was to in vitro compare the adhesive strength in sandblasted or not samples using a universal testing machine. Thirty -two bovine teeth were divided into two groups, namely test (n = 16 bars), sandblasting with aluminum oxide particles (50 µm) was performed before the adhesion procedures), and control (n = 16 bars), where no sandblasting procedure was performed. A bi-material curve test was used to evaluate the characteristics of the dentine pretreatment in terms of tensile stress and fracture strength. A scanning electron microscope (SEM) was used to analyze the fracture topography in the composite, bonding, dentin, and at the relative interfaces. The results demonstrated a statistically significant difference between the two groups in terms of tensile stress at maximum load showing values of 84.300 ± 51.342 MPa and 35.071 ± 16.609 MPa, respectively for test and control groups (p = 0.033). Moreover, a fracture strength test showed values of 18.543 ± 8.145 MPa for test and 8.186 ± 2.833 MPa for control group (p = 0.008). In conclusion, the sandblasting treatment of the dentine significantly influenced the mechanical resistance of the adhesion in this in vitro study.
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Affiliation(s)
- Bruna Sinjari
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (G.D.); (I.R.); (A.G.); (S.C.); (T.T.)
- Electron Microscopy Laboratory, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy
| | - Manlio Santilli
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (G.D.); (I.R.); (A.G.); (S.C.); (T.T.)
- Electron Microscopy Laboratory, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy
| | - Gianmaria D’Addazio
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (G.D.); (I.R.); (A.G.); (S.C.); (T.T.)
- Electron Microscopy Laboratory, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy
| | - Imena Rexhepi
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (G.D.); (I.R.); (A.G.); (S.C.); (T.T.)
- Electron Microscopy Laboratory, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy
| | - Alessia Gigante
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (G.D.); (I.R.); (A.G.); (S.C.); (T.T.)
| | - Sergio Caputi
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (G.D.); (I.R.); (A.G.); (S.C.); (T.T.)
- Electron Microscopy Laboratory, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy
| | - Tonino Traini
- Department of Medical, Oral and Biotechnological Sciences, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy; (M.S.); (G.D.); (I.R.); (A.G.); (S.C.); (T.T.)
- Electron Microscopy Laboratory, University G. d’Annunzio Chieti-Pescara, 66100 Chieti, Italy
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Hirokane E, Takamizawa T, Kasahara Y, Ishii R, Tsujimoto A, Barkmeier WW, Latta MA, Miyazaki M. Effect of double-layer application on the early enamel bond strength of universal adhesives. Clin Oral Investig 2020; 25:907-921. [PMID: 32474808 DOI: 10.1007/s00784-020-03379-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 05/25/2020] [Indexed: 10/24/2022]
Abstract
OBJECTIVES The present study aimed to investigate the changes in the enamel bond strengths of universal adhesives in the early phase of specimen creation and evaluate the effect of double-layer application on enamel bond effectiveness using different etching modes. METHOD Four universal adhesives, namely Clearfil Universal Bond Quick, G-Premio Bond, Scotchbond Universal, and Tokuyama Universal Bond, were used. Clearfil SE Bond two-step self-etch adhesive system was used as a comparison. Fifteen specimens per group were used for determining the shear bond strength (SBS) to bovine enamel in the etch-and-rinse or self-etch mode. The adhesive was applied to specimens in accordance with the manufacturers' instructions (single-layer application), or the adhesive was applied twice (double-layer application). The bonded specimens were stored in distilled water at 37 °C for 5 min or 1, 6, 12, or 24 h before SBS testing. The flexural properties of the resin composite Clearfil AP-X were measured for the same storage periods. RESULTS All universal adhesives exhibited increased SBS values with prolonged storage periods regardless of the application technique or etching mode used. Double-layer application was associated with higher SBS values than single-layer application for most universal adhesives over the same storage period. CONCLUSION Phosphoric acid pre-etching and double-layer application of universal adhesives resulted in increased enamel bond strength in the early phase of specimen bonding. CLINICAL RELEVANCE Care should be taken when using universal adhesives in the self-etch mode for enamel bonding because the enamel adhesion is sensitive to the duration after filling.
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Affiliation(s)
- Eizo Hirokane
- Department of Operative Dentistry, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Toshiki Takamizawa
- Department of Operative Dentistry, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan.
| | - Yuta Kasahara
- Department of Operative Dentistry, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Ryo Ishii
- Department of Operative Dentistry, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Akimasa Tsujimoto
- Department of Operative Dentistry, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
| | - Wayne W Barkmeier
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Mark A Latta
- Department of General Dentistry, Creighton University School of Dentistry, Omaha, NE, USA
| | - Masashi Miyazaki
- Department of Operative Dentistry, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310, Japan
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Chowdhury AFMA, Islam R, Alam A, Matsumoto M, Yamauti M, Carvalho RM, Sano H. Variable Smear Layer and Adhesive Application: The Pursuit of Clinical Relevance in Bond Strength Testing. Int J Mol Sci 2019; 20:ijms20215381. [PMID: 31671751 PMCID: PMC6861976 DOI: 10.3390/ijms20215381] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/25/2019] [Accepted: 10/25/2019] [Indexed: 11/20/2022] Open
Abstract
The removal or modification of smear layers that cover the dentin is critical to allow the penetration of adhesive molecules and to ensure a strong bond between resin and dentin. Aiming to establish a model for clinically-relevant dentin-bond testing, we evaluated the effects of smear layers created by abrasives having similar coarseness (180-grit SiC paper; fine-grit diamond bur) and application modes (single application; double application) on the microtensile bond strengths (µTBS) of two currently available universal adhesives (G-Premio Bond; Scotchbond Universal Adhesive) and a two-step self-etch adhesive (Clearfil Megabond 2). Sixty extracted human third molars were used for the μTBS test. Data were analyzed by three-way ANOVA and Tukey’s test (α = 0.05). Fracture modes were determined using stereomicroscopy. An additional 24 third molars were prepared for observation of the resin–dentin interface by TEM and adhesive-smear layer interaction by SEM. μTBS was significantly affected by the adhesives and their application modes (p < 0.001), implying that the double application of universal adhesives should be recommended to improve their performance. The effect of smear layers was not significant (p > 0.05), indicating that 180-grit SiC papers could be used to prepare dentin as a substitute for fine-grit diamond burs for dentin-bond testing in laboratory settings.
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Affiliation(s)
- Abu Faem Mohammad Almas Chowdhury
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan.
| | - Rafiqul Islam
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan.
| | - Arefin Alam
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan.
| | - Mariko Matsumoto
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan.
| | - Monica Yamauti
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan.
| | - Ricardo Marins Carvalho
- Department of Oral Biological and Medical Sciences, Division of Biomaterials, Faculty of Dentistry, University of British Columbia, 2199 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada.
| | - Hidehiko Sano
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan.
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Saito T, Takamizawa T, Ishii R, Tsujimoto A, Hirokane E, Barkmeier WW, Latta MA, Miyazaki M. Influence of Application Time on Dentin Bond Performance in Different Etching Modes of Universal Adhesives. Oper Dent 2019; 45:183-195. [PMID: 31567054 DOI: 10.2341/19-028-l] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We attempted to determine the effect of universal adhesive application time on dentin bond performance in different etching modes based on shear bond strength (SBS) tests and surface free energy (SFE) measurements. The five universal adhesives used were Adhese Universal (AU), Clearfil Universal Bond Quick (CQ), G-Premio Bond (GP), Scotchbond Universal (SU), and Tokuyama Universal Bond (TU). Bovine dentin specimens were divided into four groups of 10 for each adhesive. SBS and SFE were determined after applying the following surface treatments: 1) self-etch (SE) mode with immediate air blowing after adhesive application (IA treatment), 2) SE mode with prolonged application time (PA treatment), 3) etch-and-rinse (ER) mode with IA treatment, and 4) ER mode with PA treatment. Bonded specimens were subjected to SBS testing. The SFE of adhesive-treated dentin surfaces was measured after rinsing with acetone and water. Three-way analysis of variance revealed that dentin SBS values (p<0.001) were significantly influenced by the factors of adhesive type and application duration, but the factor of pre-etching was not significant (p=0.985). The manufacturer's instructions require longer application times for AU and SU, which showed significantly lower SBS values in IA than in PA treatment in both etching modes. However, the difference in the other adhesives was not significant between the IA and PA treatments in either etching mode. The total SFE (γS) was dependent on the adhesive and etching mode. The γS value of the initial group (SiC paper ground group) at baseline was 69.5 (mN·m-1) and that of the pre-etching group at baseline was 30.6 (mN·m-1). For all the adhesives, γS in SE mode showed significantly higher values than in ER mode, regardless of the application time. In SE mode, almost all universal adhesives tested showed lower γS values in PA treatment than in IA treatment. For ER mode, all the adhesives showed significantly higher γS values than those of the pre-etching baseline, regardless of the application time. Most adhesives did not show any significant differences in γS values between IA and PA treatments, regardless of etching mode.
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Chowdhury AFMA, Saikaew P, Matsumoto M, Sano H, Carvalho RM. Gradual dehydration affects the mechanical properties and bonding outcome of adhesives to dentin. Dent Mater J 2019; 38:361-367. [PMID: 30814455 DOI: 10.4012/dmj.2018-142] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study evaluated the effects of dehydration on the mechanical properties of adhesive resins and dentin, and on the microtensile bond strength (µTBS) of adhesives. Third molars were randomly bonded with Clearfil Mega Bond (MB) or Clearfil SE Bond 2 (SE). After water-storage (37°C; 24 h), µTBS was obtained in 'wet' (tested after 5 min of removal from storage) and 'dehydrated' (tested after 10, 15 min and 24 h) conditions by a universal tester (crosshead speed: 1 mm/min). Data were analyzed by two-way ANOVA and Duncan's test. Hardness (H), Elastic modulus (E) and weight-loss of dentin beams and adhesive-resin discs were also monitored over time and analyzed by one-way repeated measures ANOVA and Bonferroni's test (α=0.05). Significant differences in bond strength were observed for adhesives and for conditions. Except for dentin's E, dehydration caused significant gradual changes in the H, E and weight of adhesive resins and dentin (p<0.05).
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Affiliation(s)
- A F M Almas Chowdhury
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University
| | - Pipop Saikaew
- Department of Operative Dentistry and Endodontics, Faculty of Dentistry, Mahidol University
| | - Mariko Matsumoto
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University
| | - Hidehiko Sano
- Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University
| | - Ricardo M Carvalho
- Department of Oral Biological and Medical Sciences, Division of Biomaterials, Faculty of Dentistry, University of British Columbia
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El Gezawi M, Haridy R, Abo Elazm E, Al-Harbi F, Zouch M, Kaisarly D. Microtensile bond strength, 4-point bending and nanoleakage of resin-dentin interfaces: Effects of two matrix metalloproteinase inhibitors. J Mech Behav Biomed Mater 2017; 78:206-213. [PMID: 29172125 DOI: 10.1016/j.jmbbm.2017.11.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 11/11/2017] [Accepted: 11/16/2017] [Indexed: 02/09/2023]
Abstract
Chronic degradation of hybrid layer collagen by matrix metalloproteinases (MMPs) jeopardizes resin-dentin interfacial integrity and limits the durability of dental restorations. The 4-point bending strength (BS) is a valid but uncommon method of testing the mechanical behavior of resin-dentin interfaces. The present study aims to analyze the influence of two matrix metalloproteinase inhibitors on microtensile bond strength (µTBS), BS and nanoleakage. A total of 48M were divided into three groups according to bonding procedure. Teeth were horizontally sectioned to produce a flat dentin surface. In the control group, etch-and-rinse Prime&Bond One (Dentsply) bonding was used; in the self-etch group, methacryloyloxydodecylpyridinium bromide (MDPB)-containing Clearfil SE Protect (Kuraray) was used; and in the benzalkonium chloride (BAC)-etch group, BAC-etchant (Bisco) was used. A Ceram.X-One (Dentsply) composite was built as three successive layers and was light-cured. Samples were sectioned to produce microrods that were randomly divided into two groups for analysis at baseline and after 6 months of water immersion (n = 32), plus one slab for nanoleakage analysis (n = 8) via scanning electron microscopy (SEM) and digital image analysis (Fiji). Data were analyzed using the Weibull distribution and a mixed-model ANOVA with a post hoc Tukey test. All groups showed deterioration of the initial bonds. The self-etch group had a worse baseline µTBS than the control but had the best BS after aging. BAC-etch did not improve bond stability of etch-and-rinse adhesive. The µTBS and BS test results after aging were moderately correlated. Mixed fractures prevailed with regard to µTBS, whereas adhesive fractures dominated with regard to BS. Nanoleakage was not eliminated in any group and increased after aging. MDPB self-etch resisted bond degradation better than etch-and-rinse adhesives, even after BAC-etching. Integrating BS in studies of µTBS and nanoleakage might provide more clinically relevant outcomes for predicting the performance of dental adhesives.
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Affiliation(s)
- Moataz El Gezawi
- Department of Restorative Dental Science, Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
| | - Rasha Haridy
- Department of Conservative Dentistry, Faculty Oral and Dental Medicine, Cairo University, Egypt; Department of Clinical Dental Sciences, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Emad Abo Elazm
- Department of Restorative Dentistry, Suez Canal University, Egypt
| | - Fahad Al-Harbi
- Department of Substitutive Dental Sciences, Imam Abdulrahman bin Faisal University, Saudi Arabia
| | - Mariem Zouch
- Department of Mathematics, Imam Abdulrahman bin Faisal University, Saudi Arabia
| | - Dalia Kaisarly
- Department of Conservative Dentistry and Periodontology, University Hospital, LMU Munich, Goethestrasse 70, 80336 Munich, Germany; Biomaterials Department, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt.
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11
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Influence of frequency on shear fatigue strength of resin composite to enamel bonds using self-etch adhesives. J Mech Behav Biomed Mater 2016; 62:291-298. [DOI: 10.1016/j.jmbbm.2016.05.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 05/10/2016] [Accepted: 05/11/2016] [Indexed: 11/17/2022]
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12
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Kusakabe S, Rawls HR, Hotta M. Relationship between thin-film bond strength as measured by a scratch test, and indentation hardness for bonding agents. Dent Mater 2016; 32:e55-62. [PMID: 26777704 DOI: 10.1016/j.dental.2015.11.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 10/30/2015] [Accepted: 11/20/2015] [Indexed: 10/22/2022]
Abstract
OBJECTIVES To evaluate thin-film bond strength between a bonding agent and human dentin, using a scratch test, and the characteristics and accuracy of measurement. METHODS One-step bonding agents (BeautiBond; Bond Force; Adper Easy Bond; Clearfil tri-S Bond) and two-step bonding agents (Cleafil SE Bond; FL-Bond II) were investigated in this study. Flat dentin surfaces were prepared for extracted human molars. The dentin surfaces were ground and bonding agents were applied and light cured. The thin-film bond strength test of the specimens was evaluated by the critical load at which the coated bonding agent failed and dentin appeared. The scratch mark sections were then observed under a scanning electron microscope. Indentation hardness was evaluated by the variation in depth under an applied load of 10gf. Data were compared by one-way ANOVA with the Scheffé's post hoc multiple comparison test (p<0.05). In addition, thin-film bond strength and indentation hardness were analyzed using analysis of correlation and covariance. RESULTS The thin-film bond strength of two-step bonding agents were found to be significantly higher than that of one-step bonding agents with small standard deviations. Scratch marks consistently showed adhesive failure in the vicinity of the bonding agent/dentin interface. The indentation hardness showed a trend that two-step bonding agents have greater hardness than one-step bonding agents. A moderately significant correlation (r(2)=0.31) was found between thin-film bond strength and indentation hardness. SIGNIFICANCE Thin-film bond strength test is a valid and reliable means of evaluating bond strength in the vicinity of the adhesive interface and is more accurate than other methods currently in use. Further, the thin-film bond strength is influenced by the hardness of the cued bonding agent.
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Affiliation(s)
- Shusuke Kusakabe
- Division of Oral Functional Science and Rehabilitation, Department of Operative Dentistry, Asahi University School of Dentistry, 1851 Hozumi, Mizuho-city, Gifu 501-0296, Japan; Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, United States.
| | - H Ralph Rawls
- Comprehensive Dentistry, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229, United States
| | - Masato Hotta
- Division of Oral Functional Science and Rehabilitation, Department of Operative Dentistry, Asahi University School of Dentistry, 1851 Hozumi, Mizuho-city, Gifu 501-0296, Japan
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13
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Salehi S, Cooper P, Smith A, Ferracane J. Dentin matrix components extracted with phosphoric acid enhance cell proliferation and mineralization. Dent Mater 2016; 32:334-42. [PMID: 26777093 DOI: 10.1016/j.dental.2015.11.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 11/07/2015] [Accepted: 11/20/2015] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Acids, such as those used in adhesive dentistry, have been shown to solubilize bioactive molecules from dentin. These dentin matrix components (DMC) may promote cell proliferation and differentiation, and ultimately contribute to dentin regeneration. The objective of this study was to evaluate the potential for varying concentrations of DMC extracted from human dentin by phosphoric acid of a range of pHs to stimulate proliferation and mineralization of two different cultured pulp cell populations. METHODS DMC were solubilized from powdered human dentin (7 days - 4°C) by phosphoric acid of pH 1, 3, and 5 and also, EDTA. Extracts were dialyzed for 7 days against distilled water and lyophilized. Undifferentiated mouse dental pulp cells (OD-21) and cells of the odontoblast-like cell line (MDPC-23) were seeded in six-well plates (1×10(5)) and cultured for 24h in DMEM (Dulbecco's modified Eagle's medium) containing 10% (v/v) FBS (fetal bovine serum). The cells were washed with serum-free medium and then treated with different concentrations of DMC (0.01, 0.1, 1.0 and 10.0μg/ml) daily in serum free medium for 7 days. After 3, 5 (MDPC-23 only), and 7 days of treatment, cell proliferation was measured using 10vol% Alamar blue solution, which was added to each well for 1h. Cell numbers were first measured by cell counting (Trypan blue; n=5) and Alamar blue fluorescence to validate the assay, which was then used for the subsequent assessments of proliferation. Mineralization was assessed by Alizarin Red S assay after 12 days exposure to DMC (n=5). Controls were media-only (DMEM) and dexamethasone (DEX; positive control). Results were analysed by ANOVA/Tukey's (p≤0.05). RESULTS There was a linear correlation between cell counts and Alamar blue fluorescence (R(2)>0.96 for both cell types) , verifying the validity of the Alamar blue assay for these cell types. In general, there was a dose-dependent trend for enhanced cell proliferation with higher concentration of DMC for both cell lines, especially at 10.0μg/ml. DEX exposure resulted in significantly higher mineralization, but did not affect cell proliferation. DMC exposure demonstrated significantly greater mineralization than media-only control for 10μg/ml for all extracts, and at lower concentrations for EDTA and pH 5 extracts. SIGNIFICANCE Human dentin matrix components solubilized by acids at pH levels found in commercial dentin adhesives enhanced cell proliferation and mineralization of mouse and rat undifferentiated dental pulp cells when presented in adequate concentration.
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Affiliation(s)
- Satin Salehi
- Department of Restorative Dentistry, Division of Biomaterials and Biomechanics, Oregon Health & Science University, Portland, OR 97201, USA
| | - Paul Cooper
- Oral Biology, School of Dentistry, University of Birmingham, Birmingham B4 6NN, United Kingdom
| | - Anthony Smith
- Oral Biology, School of Dentistry, University of Birmingham, Birmingham B4 6NN, United Kingdom
| | - Jack Ferracane
- Department of Restorative Dentistry, Division of Biomaterials and Biomechanics, Oregon Health & Science University, Portland, OR 97201, USA.
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14
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Lee SB, González-Cabezas C, Kim KM, Kim KN, Kuroda K. Catechol-Functionalized Synthetic Polymer as a Dental Adhesive to Contaminated Dentin Surface for a Composite Restoration. Biomacromolecules 2015; 16:2265-75. [PMID: 26176305 PMCID: PMC4534835 DOI: 10.1021/acs.biomac.5b00451] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 06/25/2015] [Indexed: 11/29/2022]
Abstract
This study reports a synthetic polymer functionalized with catechol groups as dental adhesives. We hypothesize that a catechol-functionalized polymer functions as a dental adhesive for wet dentin surfaces, potentially eliminating the complications associated with saliva contamination. We prepared a random copolymer containing catechol and methoxyethyl groups in the side chains. The mechanical and adhesive properties of the polymer to dentin surface in the presence of water and salivary components were determined. It was found that the new polymer combined with an Fe(3+) additive improved bond strength of a commercial dental adhesive to artificial saliva contaminated dentin surface as compared to a control sample without the polymer. Histological analysis of the bonding structures showed no leakage pattern, probably due to the formation of Fe-catechol complexes, which reinforce the bonding structures. Cytotoxicity test showed that the polymers did not inhibit human gingival fibroblast cells proliferation. Results from this study suggest a potential to reduce failure of dental restorations due to saliva contamination using catechol-functionalized polymers as dental adhesives.
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Affiliation(s)
- Sang-Bae Lee
- Department
of Dental Biomaterials and Bioengineering, College of Dentistry, Yonsei University, Seoul, 03722, Republic
of Korea
| | - Carlos González-Cabezas
- Department of Cariology, Restorative
Sciences and Endodontics, School
of Dentistry, and Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Kwang-Mahn Kim
- Department
of Dental Biomaterials and Bioengineering, College of Dentistry, Yonsei University, Seoul, 03722, Republic
of Korea
| | - Kyoung-Nam Kim
- Department
of Dental Biomaterials and Bioengineering, College of Dentistry, Yonsei University, Seoul, 03722, Republic
of Korea
| | - Kenichi Kuroda
- Department of Cariology, Restorative
Sciences and Endodontics, School
of Dentistry, and Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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