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Yu OY, Ge KX, Lung CYK, Chu CH. Developing a novel glass ionomer cement with enhanced mechanical and chemical properties. Dent Mater 2024; 40:e1-e13. [PMID: 38782634 DOI: 10.1016/j.dental.2024.05.019] [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: 08/07/2023] [Revised: 05/12/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
OBJECTIVE To develop a novel glass ionomer cement (NGIC) with enhanced mechanical and chemical properties and assess its biocompatibility, mechanical strength, and ion release. METHODS Nanosilver doped bioactive glass (NanoAg BAG) was synthesized by sol-gel method and characterized by scanning electron microscopy with energy-dispersive X-ray spectroscopy and transmission electron microscopy. The NanoAg BAG, together with poly(vinylphosphonic acid) (PVPA), alumino-fluorosilicate glass and poly-acrylic acid were used to synthesize NGIC. The optimal PVPA concentration for NGIC was determined by PVPA modified GIC's biocompatibility and mechanical properties and used to prepare NGIC specimens. NGIC specimens with NanoAg BAG at 0%, 1%, 2%, and 5% were allocated into Groups NGIC0, NGIC1, NGIC2, and NGIC5, respectively. The biocompatibility, surface morphology, elemental composition, surface topography, chemical properties, compressive strength, diametral tensile strength, and ion release of the NGIC were assessed. A conventional glass ionomer cement (GIC) was used as a control. RESULTS A granular BAG with nano silver particles attached on its surface were found, indicating the successful synthesis of NanoAg BAG. PVPA at 10% presented the best effect in enhancing the biocompatibility and mechanical properties of PVPA modified GIC and was used to prepare NGIC specimens. NGIC1 showed similar biocompatibility, surface morphology and topography to GIC. Chemical properties results showed that NGICs showed the same adsorption peaks to GIC. The compressive strength (mean±SD in MPa) was 168.1 ± 29.7, 205.5 ± 29.5, 221.8 ± 46.8, 216.6 ± 59.3 and 167.7 ± 36.4, and the diametral tensile strength (mean±SD in MPa) was 14.1 ± 1.7, 18.3 ± 4.9, 21.2 ± 2.2, 17.2 ± 3.8 and 13.3 ± 3.3 for GIC, NGIC0, NGIC1, NGIC2 and NGIC5 respectively. NIGC0, NGIC1 and NGIC2 showed higher compressive and diametral tensile strength than GIC (p < 0.01). NGIC2 and NGIC5 showed higher release of fluoride, calcium, phosphate and silver ion than GIC and NGIC0 (p < 0.05). CONCLUSION A biocompatible NGIC with enhanced mechanical properties were developed. It presented enhanced fluoride, calcium, phosphate and silver ion release compared to conventional GIC.
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Affiliation(s)
- Ollie Yiru Yu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong Special Administrative Region.
| | - Kelsey Xingyun Ge
- Faculty of Dentistry, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Christie Ying-Kei Lung
- Faculty of Dentistry, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Chun-Hung Chu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong Special Administrative Region
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Khalil RJ, Al-Shamma AMW. Micro-shear bond strength of a novel resin-modified glass ionomer luting cement (eRMGIC) functionalized with organophosphorus monomer to different dental substrates. Heliyon 2024; 10:e30851. [PMID: 38765086 PMCID: PMC11101864 DOI: 10.1016/j.heliyon.2024.e30851] [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: 12/03/2023] [Revised: 03/27/2024] [Accepted: 05/07/2024] [Indexed: 05/21/2024] Open
Abstract
Objectives This study aims to assess and compare the micro-shear bond strength (μSBS) of a novel resin-modified glass-ionomer luting cement functionalized with a methacrylate co-monomer containing a phosphoric acid group, 30 wt% 2-(methacryloxy) ethyl phosphate (2-MEP), with different substrates (dentin, enamel, zirconia, and base metal alloy). This assessment is conducted in comparison with conventional resin-modified glass ionomer cement and self-adhesive resin cement. Materials and methods In this in vitro study, ninety-six specimens were prepared and categorized into four groups: enamel (A), dentin (B), zirconia (C), and base metal alloys (D). Enamel (E) and dentin (D) specimens were obtained from 30 human maxillary first premolars extracted during orthodontic treatment. For zirconia and metal alloys, 48 disks were manufactured using IPS e.max ZirCAD through dry milling and Co-Cr powder alloy by selective laser milling. Each group was further subdivided into three subgroups (n = 8) according to the luting cement used: (1) Fuji PLUS resin-modified glass ionomer luting cement (FP) as a control cement, (2) modified control cement (eRMGIC), and (3) RelyX U 200 (RU 200) self-adhesive resin cement. The two-way analysis of variance and Tukey's HSD were used to assess the data obtained from measuring the μSBS of the samples. Results The results of this study showed that the mean μSBS values of eRMGIC were statistically higher compared to FP in all tested groups (p < 0.001). The mean μSBS results of eRMGIC were non-significantly different from those recorded by RU 200 for all substrates except for the dentin substrate, where the RU200 cement produced significantly higher strength (p < 0.001). The failure modes were limited to a combination of mixed and adhesive failures without pure cohesive failure. Significance The functionalization of FP with an organophosphorus co-monomer (2-MEP) directly affects the adhesion performance of the functionalized cement, which may be utilized to develop a new type of acid-base cement. It exhibited a performance comparable to that of resin-based cement and should serve well under different clinical conditions.
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Affiliation(s)
- Rabeia J Khalil
- Department of Restorative and Aesthetic Dentistry, College of Dentistry, University of Baghdad, Baghdad, Iraq
| | - Abdulla M W Al-Shamma
- Department of Restorative and Aesthetic Dentistry, College of Dentistry, University of Baghdad, Baghdad, Iraq
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Kantovitz KR, Carlos NR, Silva IAPS, Braido C, Costa BC, Kitagawa IL, Nociti-Jr FH, Basting RT, de Figueiredo FKP, Lisboa-Filho PN. TiO 2 nanotube-based nanotechnology applied to high-viscosity conventional glass-ionomer cement: ultrastructural analyses and physicochemical characterization. Odontology 2023; 111:916-928. [PMID: 36917400 DOI: 10.1007/s10266-023-00799-9] [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: 04/05/2022] [Accepted: 02/28/2023] [Indexed: 03/16/2023]
Abstract
This study characterized TiO2 nanotube (TiO2-nt) ultrastructure and morphology, and the physicochemical impact on high-viscosity conventional glass-ionomer cement (GIC). TiO2-nt was synthesized by the alkaline method (n = 3), assessed by scanning (SEM) and transmission electron microscope (TEM), and was added (3%, 5%, 7%-in weight) to KM (Ketac Molar EasyMix™). Analyses included: SEM; Energy-dispersive spectroscopy (EDS); Raman spectroscopy (RAMAN); Setting time with Gillmore needles (ST); Color (Co); Radiopacity (XR); Water sorption (WS); and solubility (SO). Quantitative data were submitted to ANOVA and Tukey's tests (chr = 0.05). External and internal TiO2-nt diameters were 11 ± 2 nm and 6 ± 0 nm, respectively. Data analyses showed: (i) TiO2-nt present into KM matrix, with a concentration-dependent increase of Ti levels into KM, (ii) physical interaction between KM and TiO2-nt, (iii) longer initial ST for the 7% group compared to KM and 3% groups (p ≤ 0.01), (iv) decreased luminosity and yellowness for the 5% and 7% groups, (v) 36% greater radiopacity for the 5% group compared to enamel, dentin, and KM, and (vi) lower SO values for the 5% group, with no significant differences on WS across the groups. TiO2-nt displayed physical interaction with KM matrix, and also modified SO, XR and Co, without affecting ST. This study provides information on the potential impact of TiO2-nt on GIC performance. TiO2-nt may be proposed to boost confidence among dental surgeons in terms of GIC's handling characteristics, success rate and differential diagnostic.
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Affiliation(s)
| | - Natália Russo Carlos
- Faculdade São Leopoldo, SLMANDIC, Rua José Rocha Junqueira, 13, Campinas, SP, 13045-755, Brazil
| | | | - Caroline Braido
- Pediatric Division, Department of Health Sciences, Orthodontics and Pediatric Dentistry, Piracicaba Dental School, University of Campinas, UNICAMP, Piracicaba, SP, Brazil
| | - Bruna Carolina Costa
- Department of Physics, School of Science, São Paulo State University, UNESP, Bauru, SP, Brazil
| | - Igor Lebedenco Kitagawa
- Federal Institute of Education, Science and Technology of São Paulo, IFSP, Birigui, SP, Brazil
| | - Francisco Humberto Nociti-Jr
- Faculdade São Leopoldo, SLMANDIC, Rua José Rocha Junqueira, 13, Campinas, SP, 13045-755, Brazil
- Division of Periodontics, Department of Prosthodontics and Periodontics, Piracicaba Dental School, University of Campinas, UNICAMP, Piracicaba, SP, Brazil
| | - Roberta Tarkany Basting
- Faculdade São Leopoldo, SLMANDIC, Rua José Rocha Junqueira, 13, Campinas, SP, 13045-755, Brazil
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Magalhães GDAP, Thomson JJ, Smoczer C, Young LA, Matos AO, Pacheco RR, Souza MT, Zanotto ED, Puppin Rontani RM. Effect of Biosilicate ® Addition on Physical-Mechanical and Biological Properties of Dental Glass Ionomer Cements. J Funct Biomater 2023; 14:302. [PMID: 37367266 DOI: 10.3390/jfb14060302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/26/2023] [Accepted: 05/27/2023] [Indexed: 06/28/2023] Open
Abstract
This study investigated the influence of incorporating Biosilicate® on the physico-mechanical and biological properties of glass ionomer cement (GIC). This bioactive glass ceramic (23.75% Na2O, 23.75% CaO, 48.5% SiO2, and 4% P2O5) was incorporated by weight (5%, 10%, or 15%) into commercially available GICs (Maxxion R and Fuji IX GP). Surface characterization was made by SEM (n = 3), EDS (n = 3), and FTIR (n = 1). The setting and working (S/W time) times (n = 3) and compressive strength (CS) were analyzed (n = 10) according to ISO 9917-1:2007. The ion release (n = 6) was determined and quantified by ICP OES and by UV-Vis for Ca, Na, Al, Si, P, and F. To verify cell cytotoxicity, stem cells from the apical papilla (SCAP) were exposed to eluates (n = 3, at a ratio of 1.8 cm2/mL) and analyzed 24 h post-exposure. Antimicrobial activity against Streptococcus mutans (ATCC 25175, NCTC 10449) was analyzed by direct contact for 2 h (n = 5). The data were submitted for normality and lognormality testing. One-way ANOVA and Tukey's test were applied for the working and setting time, compressive strength, and ion release data. Data from cytotoxicity and antimicrobial activity were submitted for Kruskal-Wallis' testing and Dunn's post hoc test (α = 0.05). Among all experimental groups, only those with 5% (wt) of Biosilicate® showed better surface quality. Only M5% showed a comparable W/S time to the original material (p = 0.7254 and p = 0.5912). CS was maintained for all Maxxion R groups (p > 0.0001) and declined for Fuji IX experimental groups (p < 0.0001). The Na, Si, P, and F ions released were significantly increased for all Maxxion R and Fuji IX groups (p < 0.0001). Cytotoxicity was increased only for Maxxion R with 5% and 10% of Biosilicate®. A higher inhibition of S. mutans growth was observed for Maxxion R with 5% of Biosilicate® (less than 100 CFU/mL), followed by Maxxion R with 10% of Biosilicate® (p = 0.0053) and Maxxion R without the glass ceramic (p = 0.0093). Maxxion R and Fuji IX presented different behaviors regarding Biosilicate® incorporation. The impacts on physico-mechanical and biological properties were different depending on the GIC, but therapeutic ion release was increased for both materials.
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Affiliation(s)
- Gabriela de Alencar Pinto Magalhães
- Department of Health Sciences and Pediatric Dentistry, Pediatric Division, Piracicaba Dental School, UNICAMP, State University of Campinas, Piracicaba 13414-903, Brazil
| | - Joshua J Thomson
- Division of Integrated Biomedical Sciences, University of Detroit Mercy School of Dentistry, Detroit, MI 48208, USA
| | - Cristine Smoczer
- Division of Integrated Biomedical Sciences, University of Detroit Mercy School of Dentistry, Detroit, MI 48208, USA
| | - Laura Ann Young
- Division of Integrated Biomedical Sciences, University of Detroit Mercy School of Dentistry, Detroit, MI 48208, USA
| | - Adaias O Matos
- Division of Clinical Essentials and Simulation, University of Detroit Mercy School of Dentistry, Detroit, MI 48208, USA
| | - Rafael Rocha Pacheco
- Department of Restorative Sciences, Dental College of Georgia at Augusta University, Augusta, GA 30912, USA
| | - Maria Trevelin Souza
- Vitreous Materials Laboratory, Department of Materials Engineering, Center for Research, Education and Technology in Vitreous Materials (CeRTEV), Federal University of São Carlos (UFSCar), São Carlos 13565-905, Brazil
| | - Edgar Dutra Zanotto
- Vitreous Materials Laboratory, Department of Materials Engineering, Center for Research, Education and Technology in Vitreous Materials (CeRTEV), Federal University of São Carlos (UFSCar), São Carlos 13565-905, Brazil
| | - Regina Maria Puppin Rontani
- Department of Health Sciences and Pediatric Dentistry, Pediatric Division, Piracicaba Dental School, UNICAMP, State University of Campinas, Piracicaba 13414-903, Brazil
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Kashyap PK, Chauhan S, Negi YS, Goel NK, Rattan S. Biocompatible carboxymethyl chitosan-modified glass ionomer cement with enhanced mechanical and anti-bacterial properties. Int J Biol Macromol 2022; 223:1506-1520. [PMID: 36368362 DOI: 10.1016/j.ijbiomac.2022.11.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022]
Abstract
Due to the potential adverse effects of conventional dental cements, the demand for biocompatible cements have grown tremendously in the field of dentistry. In this respect, Glass ionomer cements (GICs) are being developed by different researchers. However, low mechanical strength of GIC make them unsuitable for application in high-stress areas. Thus, numerous initiatives to improve mechanical performance have been attempted till date including incorporation of reinforcing fillers. Novelty of the study lies in using carboxymethyl chitosan (CMC) to develop a biocompatible dental cement (DC/CMC-m-GP), which would have enhanced mechanical strength due to greater interaction of CMC with the particles of GIC and better cyto-compatibility due to its cell-proliferation activity. The mechanical strength, acid erosion and fluoride release of DC/CMC-m-GP were studied and compared with control dental cement (DC/Control). DC/CMC-m-GP shows compressive strength of 157.45 M Pa and flexural strength of 18.76 M Pa which was higher as compared to DC/Control. The morphology of the GICs were studied through FESEM. Anti-microbial activity of DC/CMC-m-GP was studied by Agar disc-diffusion method and biofilm assay against S. mutans, which shows that DC/CMC-m-GP inhibits bacterial adhesion on its surface. MTT assay infers that DC/CMC-m-GP was non-cytotoxic and did not affect the cell viability significantly.
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Affiliation(s)
| | - Sonal Chauhan
- Amity Institute of Applied Sciences, Amity University Uttar Pradesh, India.
| | | | - Narender Kumar Goel
- Radiation Technology Development Division, Bhabha Atomic Research Centre, India.
| | - Sunita Rattan
- Amity Institute of Applied Sciences, Amity University Uttar Pradesh, India.
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Effect of radiant heat induced by a diode laser (445 nm) on setting process of glass-ionomer cements monitored by Fourier transform infrared spectroscopy. Dent Mater 2022; 38:1947-1955. [DOI: 10.1016/j.dental.2022.11.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 10/12/2022] [Accepted: 11/11/2022] [Indexed: 11/18/2022]
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Kashyap PK, Negi YS, Goel NK, Diwan RK, Rattan S. Chemical initiator-free synthesis of Poly (acrylic acid-co-itaconic acid) using radiation-induced polymerization for application in dental cements. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2022.110243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Messer-Hannemann P, Samadi M, Böttcher H, Duy S, Duy D, Albrecht N, Schwendicke F, Effenberger S. Evaluation of a Method to Determine Wear Resistance of Class I Tooth Restorations during Cyclic Loading. MATERIALS (BASEL, SWITZERLAND) 2022; 15:5440. [PMID: 35955375 PMCID: PMC9369466 DOI: 10.3390/ma15155440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 07/08/2022] [Accepted: 07/29/2022] [Indexed: 06/15/2023]
Abstract
The aim of this study was the development of a test regime to determine the wear resistance and predict the clinical performance of conventional glass ionomer cement (GIC) restorations in Class I tooth cavities. Cavities were prepared in excised human teeth and restored using three conventional glass ionomer restorative materials: DeltaFil, Fuji IX GP and Ketac Universal. The restored teeth were mechanically and thermally stressed using a chewing simulator with a maximum number of 1,200,000 load cycles. Besides determining the number of cycles achieved, the abrasion volume after termination of the chewing simulation was calculated using µCT images. All teeth restored with DeltaFil reached 1,200,000 cycles without any restoration failure. Only 37.5% of the restorations each with Ketac Universal and Fuji IX GP were able to achieve the maximum cycle number. A significant lower abrasion volume for restorations with DeltaFil compared to Ketac Universal (p = 0.0099) and Fuji IX GP (p = 0.0005) was found. Laboratory chewing simulations are a useful tool to study basic wear mechanisms in a controlled setting with in-vivo related parameters. DeltaFil shows an improved wear resistance compared to other conventional GICs, indicating the high potential of this material for long-lasting Class I restorations.
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Affiliation(s)
| | - Mariam Samadi
- DMG Dental-Material Gesellschaft mbH, 22547 Hamburg, Germany
| | - Henrik Böttcher
- DMG Dental-Material Gesellschaft mbH, 22547 Hamburg, Germany
| | - Sebastian Duy
- SD Mechatronik GmbH, 83620 Feldkirchen-Westerham, Germany
| | - Daniela Duy
- SD Mechatronik GmbH, 83620 Feldkirchen-Westerham, Germany
| | | | - Falk Schwendicke
- Department of Oral Diagnostics, Digital Health and Health Services Research, Charité-Universitätsmedizin Berlin, 14197 Berlin, Germany
| | - Susanne Effenberger
- DMG Dental-Material Gesellschaft mbH, 22547 Hamburg, Germany
- Department of Oral Diagnostics, Digital Health and Health Services Research, Charité-Universitätsmedizin Berlin, 14197 Berlin, Germany
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Menezes-Silva R, Fernandes P, Bueno LS, Vertuan M, Rios D, Bresciani E, Borges A, de Lima Navarro MF. Crown Reconstruction of Erosive Wear Using High-viscosity Glass Ionomer Cement: A Case Report. Oper Dent 2022; 47:239-246. [PMID: 35604838 DOI: 10.2341/20-210-s] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2021] [Indexed: 11/23/2022]
Abstract
The aim of this clinical report is to present a possible alternative treatment, with 24-month follow-up, for restoring tooth loss due to extensive erosive tooth wear. A 21-year-old male patient, complaining of intense sensitivity in the maxillary posterior teeth, and presenting severe wear on maxillary premolar and molar teeth due to gastroesophageal reflux, sought care in the university clinics. The planned treatment was to refer for medical treatment and perform restorations with the high-viscosity glass ionomer cement Equia Forte (GC Corporation, Tokyo, Japan), aiming to restore the dental anatomy and to consequently decrease the pain symptomatology. A silicone guide, obtained from a diagnostic waxing, was used during the restorative approach considering the patient's occlusion. After all the clinical steps of the restorative technique, an occlusal adjustment of restorations was performed. During monthly recalls up to 24 months, the treatment was stable and in service. In addition, the patient reported no pain and improved chewing, leading to a better quality of life.
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Affiliation(s)
- R Menezes-Silva
- *Rafael Menezes-Silva, PhD, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Phm Fernandes
- Paulo Henrique Martins Fernandes, DDS, PhD student, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - L S Bueno
- Lígia Saraiva Bueno, DDS, PhD, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - M Vertuan
- Mariele Vertuan, DDS, PhD student, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - D Rios
- Daniela Rios, DDS, PhD, associate professor, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - E Bresciani
- Eduardo Bresciani, DDS, PhD, associate professor, Institute of Science and Technology, UNESP, Sao Jose dos Campos, Brazil
| | - Afs Borges
- Anna Flavia Borges, DDS, MSc, PhD, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - M F de Lima Navarro
- Maria Fidela de Lima Navarro, DDS, PhD, professor, Bauru School of Dentistry, Bauru, Brazil Bauru, Brazil
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Abed FM, Kotha SB, AlShukairi H, Almotawah FN, Alabdulaly RA, Mallineni SK. Effect of Different Concentrations of Silver Nanoparticles on the Quality of the Chemical Bond of Glass Ionomer Cement Dentine in Primary Teeth. Front Bioeng Biotechnol 2022; 10:816652. [PMID: 35330624 PMCID: PMC8940235 DOI: 10.3389/fbioe.2022.816652] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 02/01/2022] [Indexed: 11/13/2022] Open
Abstract
Background: The nanotechnologies have been applied for dental restorative materials manufacturing such as glass ionomer cement, composites, tooth regeneration, and endodontic sealers. The study aimed to investigate the chemical bond of conventional glass ionomer cement and to evaluate the addition of different concentrations of silver nanoparticles (AgNPs) on the quality of the chemical bond of glass ionomer cement to primary dentin. Methods: Silver nanoparticle (AgNP) powder was added in concentrations of 0.2, 0.4, and 0.6% to the conventional powder of GIC Fuji II. Then, the powder was added to the liquid and mixed with the recommended powder/liquid ratio of 3.6:1 g. The Fourier-transform infrared spectra (FTIR) of teeth with 0.2%, 0.4%, and 0.6% w/w of silver nanoparticles in GIC fills and the control tooth were obtained. The conventional glass ionomer was used as a control group. The control and the plain silver tooth were subjected to FTIR analysis using an ATR–FTIR spectrophotometer (ThermoFisher Scientific, Waltham, MA, United States) with zinc selenide (ZnSe) ATR crystal (attenuated total reflection) and OPUS v7.5 software. All spectra were recorded in the range of 500–3,500 cm−1 in the transmission mode with an ATR module. Results: The AgNPs added at 0.2, 0.4, and 0.6% concentration to GIC provided some information in the context of bond interaction with the dentin. Various bond peaks were seen for calcium, carbonate, phosphate, and amide. In our study, only the amide and phosphate were generated. The amide peaks were almost similar to the control, 0.2%, 0.4%, and 0.6%, with the peaks in the range of 1250–1650 cm−1. There was a clear shift in the phosphate peak from the control, 0.2, and 0.4%, which was about 1050 cm−1, whereas for 0.6%, there was a clear shift from 1050 cm−1 to 880 cm−1. Conclusion: GIC supplemented with AgNPs showed that a concentration above 0.4% of AgNPs altered the bond quality in dentin interaction. In conclusion, adding AgNPs at a minimal level improves the mechanical properties and maintains the same bond quality as GIC.
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Affiliation(s)
- Faisal Mohammed Abed
- Ministry of Health Specialized Dental Center, King Fahd General Hospital, Madinah, Saudi Arabia.,Department of Preventive Dentistry, College of Dentistry, Riyadh Elm University (REU), Riyadh, Saudi Arabia
| | - Sunil Babu Kotha
- Department of Preventive Dentistry, College of Dentistry, Riyadh Elm University (REU), Riyadh, Saudi Arabia.,Department of Pediatric and Preventive Dentistry, Sharad Pawar Dental College and Hospital, Datta Meghe Institute of Medical Sciences (Deemed to be University), Wardha, India
| | - Haneen AlShukairi
- Department of Preventive Dentistry, College of Dentistry, Riyadh Elm University (REU), Riyadh, Saudi Arabia
| | - Fatmah Nasser Almotawah
- Department of Preventive Dentistry, College of Dentistry, Riyadh Elm University (REU), Riyadh, Saudi Arabia
| | | | - Sreekanth Kumar Mallineni
- Department of Preventive Dental Sciences, College of Dentistry, Majmaah University, Al-Majmaah, Saudi Arabia.,Center for Transdisciplinary Research (CFTR), Saveetha Institute of Medical and Technical Sciences, Saveetha Dental College, Saveetha University, Chennai, India
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Fehrenbach J, Isolan CP, Münchow EA. Is the presence of 10-MDP associated to higher bonding performance for self-etching adhesive systems? A meta-analysis of in vitro studies. Dent Mater 2021; 37:1463-1485. [PMID: 34456050 DOI: 10.1016/j.dental.2021.08.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The purpose of this systematic review and meta-analysis was to analyze the literature on the bond strength of self-etching (SE) adhesives containing 10-MDP or other acidic functional monomers, comparing the bonding performance of both compositions. METHODS This study is registered in PROSPERO (CRD42020175715) and it followed the PRISMA Statement. The literature search was performed in PubMed, Web of Science, SciELO, Scopus, LILACS, IBECS, and BBO from the starting coverage date through 30 June 2021. Study eligibility criteria consisted of in vitro studies that evaluated the bond strength (microtensile, microshear, tensile or shear testing) to sound dentin/enamel of a minimum of two distinct SE systems, with at least one material containing 10-MDP and one other being comprised of a distinct acidic composition. Statistical analyses were carried out with RevMan 5.3.5 and using random-effects models with the significance level at p < 0.05. Also, Bayesian network meta-analysis (NMA) was conducted using MetaInsight V3 tool. RESULTS From 740 relevant studies evaluated in full-text analysis, 210 were incorporated to the systematic review and 206 in meta-analysis. The majority of studies was classified as having medium risk of bias (56.7%), followed by low (35.2%) and high (8.1%) risk of bias. Data from a total of 64 adhesive systems were collected, which favored the 10-MDP-based group at both dentin (overall effect: 6.98; 95% CI: 5.61, 8.36; p < 0.00001) and enamel (overall effect: 2.79; 95% CI: 1.62, 3.96; p < 0.00001) substrates. Microtensile testing was more frequently used (73.4%) in the included studies. Adhesives based on 10-MDP showed greater bonding performance than adhesives comprised of monomers such as PENTA, 6-MHP, 4-META, 4-MET, pyrophosphate esters, mixed composition or monomers derived from sulfonic acid (p ≤ 0.01); whereas similar bond strength values were verified between 10-MDP-based materials and those containing PEM-F, acrylamide phosphates, 4-AET, MAC-10, or monomers derived from polyacrylic and phosphonic acids (p ≥ 0.05). Adhesives based on GPDM were the only ones that resulted in greater bonding potential than the 10-MDP-based group (p = 0.03). Dental bonds in dentin were favored with the application of 2-step 10-MDP-based adhesives; whereas in enamel the dental bonds were favored for both 2-steps versions of adhesives, regardless of the presence of 10-MDP. Indirect evidence from NMA revealed that 1-step 10-MDP-free and universal 10-MDP-free adhesives seemed to perform worst in dentin and enamel, respectively. SIGNIFICANCE Adhesives containing 10-MDP showed higher bonding performance than materials formulated with other acidic ingredients, although this result relied on the type of mechanical testing, type of the substrate, acidic composition of the adhesive, and the application category of the SE system. This review summarized the effects of the foregoing factors on the adhesion to dental substrates.
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Affiliation(s)
- Julia Fehrenbach
- Graduate Program in Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Santa Cecília, Porto Alegre, Brazil.
| | - Cristina Pereira Isolan
- Department of Restorative Dentistry, School of Dentistry, Federal University of Jequitinhonha and Mucuri Valleys, Rua da Glória, 187, Centro, Diamantina, Brazil.
| | - Eliseu Aldrighi Münchow
- Graduate Program in Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Santa Cecília, Porto Alegre, Brazil; Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Porto Alegre, Brazil.
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Wawrzyńczak A, Kłos J, Nowak I, Czarnecka B. Surface Studies on Glass Powders Used in Commercial Glass-Ionomer Dental Cements. Molecules 2021; 26:5279. [PMID: 34500713 PMCID: PMC8433982 DOI: 10.3390/molecules26175279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/20/2021] [Accepted: 08/28/2021] [Indexed: 11/30/2022] Open
Abstract
The surface properties of three commercial ionomer glass powders, i.e., Fuji IX, Kavitan Plus and Chemadent G-J-W were studied. Samples were analyzed by X-ray fluorescence spectroscopy (XRF), and the density was determined by gas pycnometry. Morphology was studied using scanning electron microscopy (SEM) and laser diffraction (LD) technique, whereas low-temperature nitrogen sorption measurements determined textural parameters like specific surface area and pore volume. Thermal transformations in the materials studied were evaluated by thermogravimetric analysis (TGA), which was carried out in an inert atmosphere between 30 °C and 900 °C. XRF showed that Fuji IX and Kavitan Plus powders were strontium-based, whereas Chemadent G-J-W powder was calcium-based. Powders all had a wide range of particle sizes under SEM and LD measurements. Specific surface areas and pore volumes were in the range 1.42-2.73 m2/g and 0.0029 to 0.0083 cm3/g, respectively, whereas densities were in the range 2.6428-2.8362 g/cm3. Thermogravimetric analysis showed that the glass powders lost mass in a series of steps, with Fuji IX powder showing the highest number, some of which are attributed to the dehydration and decomposition of the polyacrylic acid present in this powder. Mass losses were more straightforward for the other two glasses. All three powders showed distinct losses at around 780 °C and 835 °C, suggesting that similar dehydration steps occur in all these glasses. Other steps, which differed between glass powders, are attributed to variations in states of water-binding on their surfaces.
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Affiliation(s)
- Agata Wawrzyńczak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland; (A.W.); (J.K.); (I.N.)
| | - Jacek Kłos
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland; (A.W.); (J.K.); (I.N.)
- Department of Biomaterials and Experimental Dentistry, Poznan University of Medical Sciences, Bukowska 70, 60-812 Poznań, Poland
| | - Izabela Nowak
- Faculty of Chemistry, Adam Mickiewicz University in Poznań, Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland; (A.W.); (J.K.); (I.N.)
| | - Beata Czarnecka
- Department of Biomaterials and Experimental Dentistry, Poznan University of Medical Sciences, Bukowska 70, 60-812 Poznań, Poland
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Lopes L, Terada R, de Castro-Hoshino LV, de Oliveira B, Pascotto RC, Baesso ML, Tabchoury C, Sato F, Nicholson JW, Sidhu SK. In Vitro Evaluation of the Stabilization Time of Chemical Bonds During Setting Reaction and Microhardness of Preheated Glass-Ionomer Cements. Oper Dent 2021; 46:208-218. [PMID: 34192337 DOI: 10.2341/19-250-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: 08/20/2020] [Indexed: 11/23/2022]
Abstract
OBJECTIVES To evaluate the effect of preheating glass-ionomer cement (GIC) restorative materials on stabilization time (ST) of their metal carboxylate bonds and on microhardness. METHODS AND MATERIALS Two conventional highviscosity GICs, Ketac Universal (3M ESPE) and Equia Forte (GC), were evaluated. The thermographic camera was used to measure the temperature inside the glass-ionomer cement capsules before and after heating. The preheating of capsules was performed at 54°C for 30 seconds in a commercial device. Characterization of ST in the GICs was determined by Fourier Transform Infrared (FTIR) spectroscopy. For this, 10 samples of each material were prepared, five in the non-preheated group (control) and five with preheating. FTIR spectra were obtained 10 minutes after mixing (control group) or after heating and then every 10 minutes for 120 minutes. For the microhardness test, 20 cylindrical specimens (3 mm height × 6 mm diameter) were prepared for each material (10 preheated, 10 control). The microhardness was determined at three time intervals: 10 minutes after mixing, after the ST as detected through the FTIR part of the study, and after one week. Knoop microhardness was assessed using a diamond indenter with a 25 g load and 15 seconds dwell time. RESULTS Ketac Universal showed an increase in temperatures of 15.7°C for powder and 3.6°C for liquid, while Equia Forte showed 16.4°C for powder and 8.5°C for liquid. FTIR spectra indicated that preheating reduced the ST for Equia Forte but increased it for Ketac Universal. Preheating increased the initial microhardness (T1) of Equia Forte. With maturation over one week, it was observed that preheating significantly improved the microhardness of both materials compared with the control specimens. CONCLUSION Preheating influenced the ST and the microhardness of Ketac Universal and Equia Forte. The ST and microhardness of Ketac Universal increased after seven days, whereas Equia Forte showed a reduced ST and increased microhardness from the outset.
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Tsuzuki FM, Pascotto RC, Malacarne LC, Bento AC, Medina Neto A, de Castro-Hoshino LV, Souza M, Nicholson JW, Baesso ML. Studies of the early stages of the dynamic setting process of chemically activated restorative glass-ionomer cements. Biomater Investig Dent 2021; 8:39-47. [PMID: 33855301 PMCID: PMC8018555 DOI: 10.1080/26415275.2021.1898964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objective To evaluate the early stages of the setting process of chemically activated restorative glass-ionomer cements (GICs). Material and methods Five GICs were evaluated (n = 5): Equia Forte (GC), Equia Forte HT (GC), Ketac Universal (3M ESPE), Maxxion R (FGM) and Riva Self Cure (SDI) by Thermography, Fourier Transform Infrared Attenuated Total Reflectance Spectroscopy (FTIR-ATR) and Gillmore needle indentation mechanical testing. The FTIR-ATR spectra showed the formation of metal carboxylates within the cements and enabled the stabilization time (ST) to be determined and the thermographic camera measured the temperature field images in the sample. Data were statistically analyzed by ANOVA and Tukey–Kramer (α = 5%). Results The Gillmore needle test showed that the order of hardening was opposite to the order of ST values determined by FTIR. The results with the thermographic camera showed two stages of temperature variation, which coincided with the evolution of specific infrared bands. The exception was Maxxion R, which showed only a single step change in temperature. Conclusion The early stages of the GIC setting reaction show temperature changes, both endothermic and exothermic, at specific times, confirming the occurrence of individual chemical reactions. The early setting involves reactions other than carboxylate formation. Significance: This study gives further detail of the early stages of the setting of GICs, and past research regarding the setting reaction of GIC.
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Affiliation(s)
| | - Renata C Pascotto
- Department of Dentistry, State University of Maringa, Maringá, Brazil
| | - Luis C Malacarne
- Department of Physics, State University of Maringa, Maringá, Brazil
| | - Antonio C Bento
- Department of Physics, State University of Maringa, Maringá, Brazil
| | | | | | - Monique Souza
- Department of Physics, State University of Maringa, Maringá, Brazil
| | - John W Nicholson
- Institute of Dentistry, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Mauro L Baesso
- Department of Physics, State University of Maringa, Maringá, Brazil
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Sesame Oil ( Sesamum Indicum L.) as a New Challenge for Reinforcement of Conventional Glass Ionomer Cement, Could It Be? Int J Dent 2021; 2021:5516517. [PMID: 33824660 PMCID: PMC8007341 DOI: 10.1155/2021/5516517] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/03/2021] [Accepted: 03/10/2021] [Indexed: 11/17/2022] Open
Abstract
Purpose Despite the advantages of glass ionomer cement (GIC) including chemical bonding to the tooth structure and fluoride release, its low-grade mechanical properties make it a topic for research. Accordingly, this study was conducted to assess the ability of sesame oil as a natural bioactive additive to reinforce conventional glass ionomer cement. Materials and Methods Sesame oil was blended into the liquid component of the cement in ratios of 3 and 5 (v/v%). One control and two experimental groups were enrolled in the study; I: unmodified GIC (control), II: 3 (v/v%) sesame oil-modified GICs, and III: 5(v/v%) sesame oil-modified GICs. Compressive strength, shear bond strength, diametral tensile strength, surface microhardness, surface roughness, and color stability were the parameters assessed. A representative specimen of each group was analyzed for its chemical structure by Fourier transformation infrared spectroscopy. One-way ANOVA followed by Tukey test was used to analyze the collected data of all evaluated parameters except the color stability results, which were analyzed by Student t-test at p < 0.05. Results Three and 5 (v/v%) sesame oil-modified GICs exhibited significant increase in their compressive strength, shear bond strength, diametral strength, and surface microhardness. Concurrently, there was a significant decrease in surface roughness (p < 0.05) in both formulations of the modified cement. Both 3 and 5 (v/v%) sesame oil-modified GICs showed a clinically acceptable color change. Conclusions Sesame oil seems to be a promising natural bioactive product for reinforcement of conventional GIC with a clinically agreeable esthetic.
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Menezes-Silva R, Velasco SRM, BRESCIANi E, Bastos RDS, Navarro MFDL. A prospective and randomized clinical trial evaluating the effectiveness of ART restorations with high-viscosity glass-ionomer cement versus conventional restorations with resin composite in Class II cavities of permanent teeth: two-year follow-up. J Appl Oral Sci 2021; 29:e20200609. [PMID: 33656064 PMCID: PMC7934279 DOI: 10.1590/1678-7757-2020-0609] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 10/19/2020] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE To compare the effectiveness of ART restorations using High Viscosity Glass-ionomer cement (HVGIC) with conventional restorations using resin composite in Class II cavities of permanent teeth, in a 2-year follow-up. METHODOLOGY Seventy-seven restorations were made with each restorative material, Equia Fil-GC Corporation (ART restorations) and Z350-3M (conventional restoration), in 54 participants in this parallel and randomized clinical trial. Restorations were evaluated at 6 months, 1 and 2 years using the ART and the modified United States Public Health Service (USPHS) criteria. Chi-square test and Survival Analysis (p<0.05) were used for statistical analysis. RESULTS The success rates for ART restorations were 98.7% (6 months) and 95.8% (1 year) for both criteria. At 2 years, success rate was 92% and 90.3% when scored by the modified USPHS and ART criteria (p=0.466), respectively. The success rates for conventional restorations were 100% (6 months), 98.7% (1 year) and 91.5% (2 years) for both assessment criteria. ART restorations presented a lower survival rate by the criterion of ART (83.7%) when compared to the modified USPHS criterion of (87.8%), after 2 years (p=0.051). The survival of conventional restorations was 90.7% for both evaluation criteria. CONCLUSION At the 2-years follow-up evaluation, no statistically significant difference was observed between the success rate of ART restorations with HVGIC compared to conventional restorations with resin composite in Class II cavities of permanent teeth.
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Affiliation(s)
- Rafael Menezes-Silva
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Materiais Dentários, Endodontia e Dentística, Bauru, SP, Brasil
| | | | - Eduardo BRESCIANi
- Universidade Estadual Paulista (UNESP), Instituto de Ciências e Tecnologia, São José dos Campos, SP, Brasil
| | - Roosevelt da Silva Bastos
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Materiais Dentários, Endodontia e Dentística, Bauru, SP, Brasil
| | - Maria Fidela de Lima Navarro
- Universidade de São Paulo, Faculdade de Odontologia de Bauru, Departamento de Materiais Dentários, Endodontia e Dentística, Bauru, SP, Brasil
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Uchimura JYT, Sato F, Santana RG, Menezes-Silva R, Bueno LS, Borges AFS, de Lima Navarro MF, Nicholson JW, Sidhu SK, Pascotto RC. Translucency parameter of conventional restorative glass-ionomer cements. J ESTHET RESTOR DENT 2020; 33:935-942. [PMID: 33188585 DOI: 10.1111/jerd.12685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 10/24/2020] [Accepted: 10/30/2020] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To evaluate the translucency parameter (TP) and contrast ratio (CR) of different conventional restorative glass-ionomer cements (GICs). MATERIALS AND METHODS Eighteen brands of GICs were evaluated. Five disks of each material were made following ISO 9917-1. The luminous reflectance and Central Bureau of the International Commission on Illumination parameters of disks were evaluated using a colorimeter, against backings of white and black, to obtain the translucent parameter and contrast ratio of different brands of glass-ionomer cements. The correlation between translucency parameter and contrast ratio was assessed with the Pearson correlation test. The translucent and contrast ratio parameters values were submitted to the one-way ANOVA and Tukey test for multiple comparisons (p < 0.05). RESULTS There was a strong inverse relationship between CR and TP (r2 = 0.94, p < 0.001). The contrast ratio decreased as translucency increased. There were significant differences in TP and CR among brands (p < 0.001). CONLUSIONS GICs exhibit different translucency and contrast ratio behavior. Some brands of GICs presented very low TP and this condition would be unacceptable for areas with esthetic demands. In addition, TP and CR showed a strong linear relationship. CLINICAL SIGNIFICANCE The results found in this study demonstrated that the knowledge of the translucency and CR of different conventional restorative GICs is important in order to guide clinicians in the selection of restorative GICs for anterior teeth.
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Affiliation(s)
| | - Francielle Sato
- Department of Physics, State University of Maringá, Maringá, Paraná, Brazil
| | | | - Rafael Menezes-Silva
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru School of Dentistry-FOB-USP Bauru, São Paulo, Brazil
| | - Ligia S Bueno
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru School of Dentistry-FOB-USP Bauru, São Paulo, Brazil
| | - Ana Flávia Sanches Borges
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru School of Dentistry-FOB-USP Bauru, São Paulo, Brazil
| | - Maria Fidela de Lima Navarro
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru School of Dentistry-FOB-USP Bauru, São Paulo, Brazil
| | - John W Nicholson
- Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Sharanbir K Sidhu
- Institute of Dentistry, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
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Sharafeddin F, Alavi AA, Siabani S, Safari M. Comparison of Shear Bond Strength of Three Types of Glass Ionomer Cements Containing Hydroxyapatite Nanoparticles to Deep and Superficial Dentin. JOURNAL OF DENTISTRY (SHIRAZ, IRAN) 2020; 21:132-140. [PMID: 32582829 PMCID: PMC7280551 DOI: 10.30476/dentjods.2019.77762.0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Statement of the Problem The clinical success of glass ionomer cement (GIC) restorations depends on the strength of its bonding to dentin, yet the bond strength of nanohydroxyapatite (nHAp) added GIC to dentin needs to be investigated. Purpose This study aimed to assess if the type of GIC containing nHAp and dentin depth could affect the shear bond strength (SBS). Materials and Method In this experimental study, 60 freshly extracted intact third molars were randomly divided into two main groups of flat occlusal dentin with different cuts as superficial (S); just below the dentinoenamel junction (DEJ) and deep (D); 2mm below DEJ. After conditioning with 20% polyacrylic acid, each group were randomly assigned to the tested GIC (n=10) subgroups as (1) Fuji IX Extra+nHAp, (2) Fuji II LC+nHAp and (3) Zirconomer+nHAp. Plastic tubes were placed on the pre-treated surfaces and filled with one of the GIC, then stored in an incubator at 37 oC and 100% humidity for 24hr. The specimens were thermocycled at5/55 oC for 500 cycles and subjected to SBS test using a universal testing machine (1 mm/min). The data analyzed by Mann-Whitney and Kruskal-Wallis test (p< 0.05). Results The means of SBS of Fuji II LC+nHAp was significantly higher than Fuji IX+nHAp and Zirconomer+nHAp both in superficial and deep dentin (p< 0.05). The means of SBS of Fuji IX Extra+nHAp and Zirconomer+nHAp subgroups in superficial dentin were higher than deep dentin, this differences was statistically significant (p= 0.0001 and p= 0.009, respectively). Conclusion It can conclude that SBS was influenced by type of GIC and depth of dentin.
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Affiliation(s)
- Farahnaz Sharafeddin
- Dept. of Operative Dentistry, Biomaterials Research Center, School of Dentistry, Shiraz University of Medial Sciences, Shiraz, Iran
| | - Ali Asghar Alavi
- Dept. of Operative Dentistry, Biomaterials Research Center, School of Dentistry, Shiraz University of Medial Sciences, Shiraz, Iran
| | - Saba Siabani
- Postgraduate Student, Dept. of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mina Safari
- Postgraduate Student, Dept. of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
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Nicholson JW, Sidhu SK, Czarnecka B. Enhancing the Mechanical Properties of Glass-Ionomer Dental Cements: A Review. MATERIALS 2020; 13:ma13112510. [PMID: 32486416 PMCID: PMC7321445 DOI: 10.3390/ma13112510] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 05/20/2020] [Accepted: 05/26/2020] [Indexed: 11/18/2022]
Abstract
This paper reviews the strategies that have been reported in the literature to attempt to reinforce glass-ionomer dental cements, both conventional and resin-modified. These cements are widely used in current clinical practice, but their use is limited to regions where loading is not high. Reinforcement might extend these applications, particularly to the posterior dentition. A variety of strategies have been identified, including the use of fibres, nanoparticles, and larger particle additives. One problem revealed by the literature survey is the limited extent to which researchers have used International Standard test methods. This makes comparison of results very difficult. However, it does seem possible to draw conclusions from this substantial body of work and these are (1) that powders with conventional particle sizes do not reinforce glass-ionomer cements, (2) certain fibres and certain nanoparticles give distinct improvements in strength, and (3) in the case of the nanoparticles these improvements are associated with differences in the morphology of the cement matrix, in particular, a reduction in the porosity. Despite these improvements, none of the developments has yet been translated into clinical use.
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Affiliation(s)
- John W. Nicholson
- Dental Materials Unit, Bart’s and the London Institute of Dentistry, Queen Mary University of London, Mile End Road, London E1 4NS, UK
- Bluefield Centre for Biomaterials, 67-68 Hatton Garden, London EC1N 8JY, UK
- Correspondence:
| | - Sharanbir K. Sidhu
- Centre for Oral Bioengineering, Institute of Dentistry, Bart’s & The London School of Medicine and Dentistry, Queen Mary University of London, Turner Street, London E1 2AD, UK;
| | - Beata Czarnecka
- Department of Biomaterials and Experimental Dentistry, Poznań University of Medical Sciences, ul. Bukowska 70, 60-812 Poznań, Poland;
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Does Modification of Amalgomer with Propolis Alter Its Physicomechanical Properties? An In Vitro Study. Int J Biomater 2020; 2020:3180879. [PMID: 32454828 PMCID: PMC7238360 DOI: 10.1155/2020/3180879] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 03/27/2020] [Accepted: 04/15/2020] [Indexed: 12/25/2022] Open
Abstract
Objective To assess if incorporating ethanolic extract of propolis into ceramic-reinforced glass ionomer (Amalgomer CR) might have an influence on its physicomechanical properties. Materials and Methods Three groups were assessed; group I: Amalgomer CR (control) and two experimental groups (II and III) of propolis added to the liquid of Amalgomer CR with 25 and 50 v/v %, respectively. Evaluation parameters were color stability, compressive strength, microhardness, and surface roughness. Representative specimens of each group were analyzed by Fourier-transform infrared spectroscopy, energy-dispersive X-ray, X-ray diffraction, and scanning electron microscopy. Analysis of variance (ANOVA) was used to compare the results, followed by a Tukey post hoc test (p < 0.05). Results Nonsignificant color change for both groups of modified Amalgomer CR. Meanwhile, the two experimental groups exhibited a significant increase in both compressive strength and microhardness. Simultaneously, there was a significant difference in roughness values among groups with the lowest roughness values exhibited by the 50 v/v % propolis concentration. Conclusions Modification of Amalgomer CR with 50 v/v % propolis may increase its mechanical properties without compromising its esthetic. Clinical Significance. Modification of Amalgomer CR by 50 v/v % propolis is supposed to be a hopeful restorative material with favorable characteristics.
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MENEZES-SILVA R, OLIVEIRA BMBD, MAGALHÃES APR, BUENO LS, BORGES AFS, BAESSO ML, NAVARRO MFDL, NICHOLSON JW, SIDHU SK, PASCOTTO RC. Correlation between mechanical properties and stabilization time of chemical bonds in glass-ionomer cements. Braz Oral Res 2020; 34:e053. [DOI: 10.1590/1807-3107bor-2020.vol34.0053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 04/20/2020] [Indexed: 05/30/2023] Open
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de Oliveira BMB, Agostini IE, Baesso ML, Menezes-Silva R, Borges AFS, Navarro MFL, Nicholson JW, Sidhu SK, Pascotto RC. Influence of external energy sources on the dynamic setting process of glass-ionomer cements. Dent Mater 2019; 35:450-456. [PMID: 30709613 DOI: 10.1016/j.dental.2019.01.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Revised: 11/02/2018] [Accepted: 01/03/2019] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To evaluate the influence of external energy sources on the dynamic setting process of glass-ionomer restorative materials. METHODS Eighteen brands of GIC were studied: Bioglass R (Biodinâmica; G1), Chemfil Rock (Dentsply; G2), Equia Forte (GC; G3), Gold Label 2 (GC; G4), Gold Label 9 (GC; G5), Glass Ionomer Cement Type II - (Shofu; G6), Ionglass R (Maquira; G7), Ion Z (FGM; G8), Ionomaster (Wilcos; G9), Ionofil Plus (Voco; G10), Ionostar Plus (Voco; G11), Ketac Molar easymix (3M ESPE; G12), Magic Glass R (Vigodent; G13), Maxxion R (FGM; G14), Riva Self Cure (SDI; G15), Vidrion R (SS White; G16), Vitro Fil R (Nova DFL; G17) and Vitro Molar (Nova DFL; G18). LED, halogen light or ultrasound (n=20 for each set) applied for 30s was used to activate setting, and a control group of each material was allowed to set without activation. Samples were analyzed by FTIR spectroscopy using the ratio of intensities of bands at 1637cm-1 (carboxylate) and 1720cm-1 (carbonyl) as a function of time. Means and standard deviations were subjected to ANOVA and Tukey tests (p<0.05). RESULTS All three activation modes significantly reduced the time at which the carboxylate content became stable in G2, G4, G5, G6, G8, G10, G14, G16, G17 and G18. By contrast, in G1, G7, G12 and G15 no activation source had any significant effect (p>0.05). SIGNIFICANCE External activation sources, namely LED, halogen light and ultrasound, typically but not always increase the setting rate of restorative GICs.
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Affiliation(s)
- Bruna M B de Oliveira
- Department of Dentistry, State University of Maringa, Av. Mandacaru 1550, 87080-000 Maringá, PR, Brazil
| | - Izabelle E Agostini
- Department of Dentistry, State University of Maringa, Av. Mandacaru 1550, 87080-000 Maringá, PR, Brazil
| | - Mauro L Baesso
- Department of Physics, State University of Maringa, Av. Colombo 5790, 87020-900 Maringá, PR, Brazil
| | - Rafael Menezes-Silva
- Department of Operative Dentistry, Endondontics and Dental Materials, Bauru School of Dentistry-FOB-USP, Al. Octávio Pinheiro Brisolla, 9-75, 17012-901 Bauru, SP, Brazil
| | - Ana Flávia S Borges
- Department of Operative Dentistry, Endondontics and Dental Materials, Bauru School of Dentistry-FOB-USP, Al. Octávio Pinheiro Brisolla, 9-75, 17012-901 Bauru, SP, Brazil
| | - Maria Fidela L Navarro
- Department of Operative Dentistry, Endondontics and Dental Materials, Bauru School of Dentistry-FOB-USP, Al. Octávio Pinheiro Brisolla, 9-75, 17012-901 Bauru, SP, Brazil
| | - John W Nicholson
- Institute of Dentistry, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, Turner Street, London E1 2AD, UK
| | - Sharanbir K Sidhu
- Institute of Dentistry, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, Turner Street, London E1 2AD, UK
| | - Renata C Pascotto
- Department of Dentistry, State University of Maringa, Av. Mandacaru 1550, 87080-000 Maringá, PR, Brazil.
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Nicholson JW. Maturation processes in glass-ionomer dental cements. ACTA BIOMATERIALIA ODONTOLOGICA SCANDINAVICA 2018; 4:63-71. [PMID: 30083577 PMCID: PMC6070969 DOI: 10.1080/23337931.2018.1497492] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Accepted: 07/02/2018] [Indexed: 11/16/2022]
Abstract
Glass-ionomer cements are used for a variety of tooth-repair functions in clinical dentistry. They are formed by reaction of a basic glass powder with a solution of polymeric water-soluble acid, usually polyacrylic acid. After the initial neutralization reaction, by which the cement hardens, various maturation reactions occur. Changes induced by these maturation reactions are identified as: increase in strength; reduction in plasticity; improvement in opacity; and increase in proportion of tightly bound water. In addition, in contact with the tooth, an ion-exchange interfacial layer is gradually formed. This is mechanically strong and chemically-resistant. These changes are described in the current paper, which reviews the extent to which they occur, and reports what is know about the chemistry that underlies them. Processes involving slow diffusion of various ions and of water through the set cement bring about these changes. They include a secondary setting reaction to form a phosphate-based phase, binding of water to co-ordination sites around metal cations and to a hydration sheath around the polymer molecules, and possibly reaction of water with glass particle surfaces to form silanol groups. Evidence from a wide range of literature sources is used to be build up a detailed picture of the chemistry of the maturation processes, and gaps in our understanding are highlighted. The article concludes that, given the importance of glass-ionomers in contemporary dentistry, it is important to know the extent to which such maturation processes occur in current cement formulations, and also to determine how rapidly they take place.
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Affiliation(s)
- John W Nicholson
- Dental Physical Sciences, Institute of Dentistry, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, London, UK.,Bluefield Centre for Biomaterials, London, UK
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