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Saridou M, Nikolaidis AK, Koulaouzidou EA, Achilias DS. Synthesis and Characterization of Dental Nanocomposite Resins Reinforced with Dual Organomodified Silica/Clay Nanofiller Systems. J Funct Biomater 2023; 14:405. [PMID: 37623650 PMCID: PMC10455476 DOI: 10.3390/jfb14080405] [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: 06/30/2023] [Revised: 07/18/2023] [Accepted: 07/30/2023] [Indexed: 08/26/2023] Open
Abstract
Quaternary ammonium (QA) compounds have been widely studied as potential disinfectants in dental restorative materials. The present work investigates whether the gradual displacement of nanosilica by QA-clay nanoparticles may have an impact on the physicochemical and mechanical properties of dental nanocomposite resins. For this purpose, Bis-GMA/TEGDMA-based composite resins were initially synthesized by incorporating 3-(trimethoxysilyl)propyl methacrylate (γ-MPS)-modified nanosilica/QA-clay nanoparticles at 60/0, 55/5, 50/10, 40/20, and 30/30 wt% filler loadings. Their structural characterization was performed by means of scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD). The degree of double bond conversion (DC) over time and the polymerization shrinkage were determined with Fourier transform infrared spectroscopy (FTIR) and a linear variable displacement transducer (LVDT), respectively. Mechanical properties as well as water sorption and solubility parameters were also evaluated after storage of nanocomposites in water for 7 days at 37 °C. Spectral data revealed intercalated clay configurations along with areas characterized by silica-clay clusters for clay loadings up to 30 wt%. Furthermore, the insertion of 10 wt% QA-clay enhanced the auto-acceleration effect also sustaining the ultimate (DC), reduced the setting contraction and solubility, and, finally, yielded flexural modulus and strength very close to those of the control nanocomposite resin. The acquired results could herald the advanced design of dental restorative materials appropriate for contemporary clinical applications.
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Affiliation(s)
- Maria Saridou
- Laboratory of Polymer and Color Chemistry and Technology, Department of Chemistry, Aristotle University Thessaloniki, 541 24 Thessaloniki, Greece (D.S.A.)
| | - Alexandros K. Nikolaidis
- Division of Dental Tissues’ Pathology and Therapeutics (Basic Dental Sciences, Endodontology and Operative Dentistry), School of Dentistry, Aristotle University Thessaloniki, 541 24 Thessaloniki, Greece;
| | - Elisabeth A. Koulaouzidou
- Division of Dental Tissues’ Pathology and Therapeutics (Basic Dental Sciences, Endodontology and Operative Dentistry), School of Dentistry, Aristotle University Thessaloniki, 541 24 Thessaloniki, Greece;
| | - Dimitris S. Achilias
- Laboratory of Polymer and Color Chemistry and Technology, Department of Chemistry, Aristotle University Thessaloniki, 541 24 Thessaloniki, Greece (D.S.A.)
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Herrera-González AM, Cuevas-Suárez CE. Evaluation of a biobased polycarbonate interpenetrated network in a dental resin composite. J Mech Behav Biomed Mater 2023; 143:105876. [PMID: 37178634 DOI: 10.1016/j.jmbbm.2023.105876] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/23/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023]
Abstract
Silanization of filler particles in a dental resin composite is achieved by the formation of Si-O-Si bonds, however, these bonds are especially vulnerable to hydrolysis because this covalent bond has a significant ionic character due to the electronegativity differences between the atoms. The objective of this study was to evaluate the use of an interpenetrated network (IPN) as alternative of silanization reaction and to assess its effect in selected properties of experimental photopolymerizable resin composites. The interpenetrate network was obtained during the photopolymerization reaction of organic matrix (BisGMA/TEGDMA) with a biobased polycarbonate. Its characterization was performed via FTIR, flexural strength, flexural modulus, depth of cure, sorption water and solubility. A resin composite formulated with non-silanized filler particles was used as control. The IPN with a biobased polycarbonate was successfully synthesized. The results showed that the IPN based resin composite had higher values of flexural strength, flexural modulus, and degree of double bond conversion than the control (p < 0.05). Polymerization shrinkage, water sorption and solubility were statistically significantly lower than the control resin (p < 0.05). Finally, this study shows there were no statistically significant differences for the biocompatibility outcomes (p > 0.05). The biobased IPN replaces the silanization reaction in resin composites, improving physical and chemical properties. Therefore, IPN with a biobased polycarbonate could be potentially useful in the formulation of dental resin composites.
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Affiliation(s)
- Ana M Herrera-González
- Laboratorio de Polímeros, Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km, 4.5 Colonia Carboneras, Mineral de la Reforma Hidalgo, C.P, 42184, Mexico.
| | - Carlos E Cuevas-Suárez
- Laboratorio de Polímeros, Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Carretera Pachuca-Tulancingo Km, 4.5 Colonia Carboneras, Mineral de la Reforma Hidalgo, C.P, 42184, Mexico
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3
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Thayumanasundaram S, Venkatesan TR, Ousset A, Van Hollebeke K, Aerts L, Wübbenhorst M, Van den Mooter G. Complementarity of mDSC, DMA, and DRS Techniques in the Study of Tg and Sub- Tg Transitions in Amorphous Solids: PVPVA, Indomethacin, and Amorphous Solid Dispersions Based on Indomethacin/PVPVA. Mol Pharm 2022; 19:2299-2315. [PMID: 35674392 DOI: 10.1021/acs.molpharmaceut.2c00123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recently, glasses, a subset of amorphous solids, have gained attention in various fields, such as polymer chemistry, optical fibers, and pharmaceuticals. One of their characteristic features, the glass transition temperature (Tg) which is absent in 100% crystalline materials, influences several material properties, such as free volume, enthalpy, viscosity, thermodynamic transitions, molecular motions, physical stability, mechanical properties, etc. In addition to Tg, there may be several other temperature-dependent transitions known as sub-Tg transitions (or β-, γ-, and δ-relaxations) which are identified by specific analytical techniques. The study of Tg and sub-Tg transitions occurring in amorphous solids has gained much attention because of its importance in understanding molecular kinetics, and it requires the combination of conventional and novel characterization techniques. In the present study, three different analytical techniques [modulated differential scanning calorimetry (mDSC), dynamic mechanical analysis (DMA), and dielectric relaxation spectroscopy (DRS)] were used to perform comprehensive qualitative/quantitative characterization of molecular relaxations, miscibility, and molecular interactions present in an amorphous polymer (PVPVA), a model drug (indomethacin, IND), and IND/PVPVA-based amorphous solid dispersions (ASDs). This is the first ever reported DMA study on PVPVA in its powder form, which avoids the contribution of solvent to the mechanical properties when a self-standing polymer film is used. A good correlation between the techniques in determining the Tg value of PVPVA, IND, and IND/PVPVA-based ASDs is established, and the negligible difference (within 10 °C) is attributed to the different material properties assessed in each technique. However, the overall Tg behavior, the decrease in Tg with increase in drug loading in ASDs, is universally observed in all the above-mentioned techniques, which reveals their complementarity. DMA and DRS techniques are used to study the different sub-Tg transitions present in PVPVA, amorphous IND, and IND/PVPVA-based ASDs because these transitions are normally too weak or too broad for mDSC to detect. For IND/PVPVA-based ASDs, both techniques show a shift of sub-Tg transitions (or secondary relaxation peaks) toward the high-temperature region from -140 to -45 °C. Thus, this paper outlines the usage of different solid-state characterization techniques in understanding the different molecular dynamics present in the polymer, drug, and their interactions in ASDs with the integrated information obtained from individual techniques.
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Affiliation(s)
| | - Thulasinath Raman Venkatesan
- Department of Physics and Astronomy, KU Leuven, 3001 Leuven, Belgium.,Institute of Physics and Astronomy, University of Potsdam, 14476 Potsdam-Golm, Germany
| | - Aymeric Ousset
- Department of Product Design and Performance, UCB Pharma, 1420 Braine-l'Alleud, Belgium
| | - Kim Van Hollebeke
- Department of Product Design and Performance, UCB Pharma, 1420 Braine-l'Alleud, Belgium
| | - Luc Aerts
- Department of Product Design and Performance, UCB Pharma, 1420 Braine-l'Alleud, Belgium
| | | | - Guy Van den Mooter
- Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, BE-3000 Leuven, Belgium
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Li Y, Guo L, Ye J, He L, Qiu T, Li X. The crosslinking directing dynamic behavior of polymer latex under the investigation toward waterborne damping coatings. J Appl Polym Sci 2021. [DOI: 10.1002/app.49676] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yue Li
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing Chaoyang China
- Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology Beijing Chaoyang China
| | - Longhai Guo
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing Chaoyang China
- Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology Beijing Chaoyang China
| | - Jun Ye
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing Chaoyang China
- Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology Beijing Chaoyang China
| | - Lifan He
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing Chaoyang China
- Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology Beijing Chaoyang China
| | - Teng Qiu
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing Chaoyang China
- Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology Beijing Chaoyang China
| | - Xiaoyu Li
- State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing Chaoyang China
- Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology Beijing Chaoyang China
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Beter J, Maroh B, Schrittesser B, Mühlbacher I, Griesser T, Schlögl S, Fuchs PF, Pinter G. Tailored Interfaces in Fiber-Reinforced Elastomers: A Surface Treatment Study on Optimized Load Coupling via the Modified Fiber Bundle Debond Technique. Polymers (Basel) 2020; 13:polym13010036. [PMID: 33374154 PMCID: PMC7795769 DOI: 10.3390/polym13010036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 01/20/2023] Open
Abstract
The interface between the reinforcement and surrounding matrix in a fibrous composite is decisive and critical for maintaining component performance, durability, and mechanical structure properties for load coupling assessment, especially for highly flexible composite materials. The clear trend towards tailored solutions reveals that an in-depth knowledge on surface treating methods to enhance the fiber–matrix interfacial interaction and adhesion properties for an optimized load transfer needs to be ensured. This research aims to quantify the effect of several surface treatments for glass fibers applied in endless fiber-reinforced elastomers with pronounced high deformations. Due to this, the glass fiber surface is directly modified with selected sizings, using a wet chemical treatment, and characterized according to chemical and mechanical aspects. For this purpose, the interfacial adhesion performance between fibers and the surrounding matrix material is investigated by a modified fiber pull-out device. The results clearly show that an optimized surface treatment improves the interface strength and chemical bonding significantly. The fiber pull-out test confirms that an optimized fiber–matrix interface can be enhanced up to 85% compared to standard surface modifications, which distinctly provides the basis of enhanced performances on the component level. These findings were validated by chemical analysis methods and corresponding optical damage analysis.
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Affiliation(s)
- Julia Beter
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
- Correspondence: ; Tel.: +43-3842-42962-31
| | - Boris Maroh
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Bernd Schrittesser
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Inge Mühlbacher
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Thomas Griesser
- Chair of Chemistry of Polymeric Materials, Montanuniversitaet Leoben, Otto-Gloeckel Strasse 2, 8700 Leoben, Austria;
| | - Sandra Schlögl
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Peter Filipp Fuchs
- Polymer Competence Center Leoben GmbH, Roseggerstrasse 12, 8700 Leoben, Austria; (B.M.); (B.S.); (I.M.); (S.S.); (P.F.F.)
| | - Gerald Pinter
- Department of Polymer Engineering and Science, Montanuniversitaet Leoben, Otto-Gloeckel Strasse 2, 8700 Leoben, Austria;
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Wang W, Zhu S, Zhang G, Wu F, Ban J, Wang L. Antibacterial and thermomechanical properties of experimental dental resins containing quaternary ammonium monomers with two or four methacrylate groups. RSC Adv 2019; 9:40681-40688. [PMID: 35542684 PMCID: PMC9082395 DOI: 10.1039/c9ra07788j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 12/02/2019] [Indexed: 12/13/2022] Open
Abstract
Resins with strong antibacterial and thermomechanical properties are critical for application in oral cavities. In this study, we first evaluated the antibacterial effect of an unfilled resin incorporating 1, 4, and 7 mass% of quaternary ammonium salt (QAS) monomers containing two methacrylate groups (MAE-DB) and four methacrylate groups (TMH-DB) against Streptococcus mutans, and tested the cytotoxicity and thermomechanical properties of the 4 mass% MAE-DB and TMH-DB modified resin materials. A neat resin without a QAS monomer served as the control. As the concentration of both QAS monomers increases, the formation of a Streptococcus mutans biofilm on the experimental material is increasingly inhibited. The results of colony forming unit counts and the metabolic activity showed that both the MAE-DB and TMH-DB modified resins have a strong bactericidal effect on the bacteria in a biofilm, but no bactericidal effect on the bacteria in a solution. The viability-staining and morphology results also demonstrate that the bacteria deform, lyse, shrink, and die on the surface of the two QAS-modified resins. Cytotoxicity results show that the addition of TMH-DB can reduce the cytotoxicity of the resin, while the addition of MAE-DB increases the cytotoxicity of the resin. DMA results show that a TMH-DB modified resin has a higher storage modulus than a MAE-DB modified resin owing to its better crosslink density. The two groups of experimental resins showed a similar glass transition temperature. These data indicate that the two QAS monomers can impart similar antibacterial properties upon contact with a dental resin, whereas TMH-DB can endow the resin with a higher crosslink density and storage modulus than MAE-DB because it has more polymerizable groups. Resins with strong antibacterial and thermomechanical properties are critical for application in oral cavities.![]()
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Affiliation(s)
- Weiguo Wang
- Department of Stomatology, No. 903 Hospital of PLA Lingyin Road 14 Hangzhou 310000 People's Republic of China + 86 571 8734 0983 + 86 571 8734 0983
| | - Sailing Zhu
- Department of Stomatology, No. 903 Hospital of PLA Lingyin Road 14 Hangzhou 310000 People's Republic of China + 86 571 8734 0983 + 86 571 8734 0983
| | - Guoqing Zhang
- Department of Stomatology, No. 903 Hospital of PLA Lingyin Road 14 Hangzhou 310000 People's Republic of China + 86 571 8734 0983 + 86 571 8734 0983
| | - Fan Wu
- Department of Stomatology, No. 903 Hospital of PLA Lingyin Road 14 Hangzhou 310000 People's Republic of China + 86 571 8734 0983 + 86 571 8734 0983
| | - Jinghao Ban
- School of Stomatology, Fourth Military Medical University Xi'an People's Republic of China
| | - Limin Wang
- Department of Stomatology, No. 903 Hospital of PLA Lingyin Road 14 Hangzhou 310000 People's Republic of China + 86 571 8734 0983 + 86 571 8734 0983
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Synthesis and Characterization of Dental Nanocomposite Resins Filled with Different Clay Nanoparticles. Polymers (Basel) 2019; 11:polym11040730. [PMID: 31013632 PMCID: PMC6524204 DOI: 10.3390/polym11040730] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/17/2019] [Accepted: 04/19/2019] [Indexed: 12/24/2022] Open
Abstract
Nanotechnology comprises a promising approach towards the update of dental materials.The present study focuses on the reinforcement ofdental nanocomposite resins with diverse organomodified montmorillonite (OMMT) nanofillers. The aim is to investigate whether the presence of functional groups in the chemical structure of the nanoclay organic modifier may virtually influence the physicochemical and/or the mechanical attitude of the dental resin nanocomposites. The structure and morphology of the prepared materials were investigated by means of wide angle X-ray diffraction and scanning electron microscopy analysis. Fourier transform infrared spectroscopy was used to determine the variation of the degree of conversion over time. Measurements of polymerization shrinkage and mechanical properties were conducted with a linear variable displacement transducer apparatus and a dynamometer, respectively. All the obtained nanocomposites revealed intercalated structures and most of them had an extensive filler distribution into the polymer matrix. Polymerization kinetics werefound to be influenced by the variance of the clay organomodifier, whilenanoclays with vinyl groups considerably increased the degree of conversion. Polymerization shrinkage was almost limited up to 50% by incorporating nanoclays. The absence of reactive groups in the OMMT structure may retain setting contraction atlow levels. An enhancement of the flexural modulus was observed, mainly by using clay nanoparticles decorated with methacrylated groups, along with a decrease in the flexural strength at a high filler loading. The overall best performance was found for the nanocomposites with OMMTs containing double bonds. The significance of the current work relies on providing novel information about chemical interactions phenomena between nanofillers and the organic matrix towards the improvement of dental restorative materials.
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Najafi H, Akbari B, Najafi F, Shahabi S, Abrishamkar A, Moztarzadeh F, Yazdanpanah A. Characterization of the physical–mechanical properties of dental resin composites reinforced with novel micro-nano hybrid silica particles: An optimization study. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2018.1526040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Hamed Najafi
- Division of Biomedical Engineering, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Babak Akbari
- Division of Biomedical Engineering, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
| | - Farhood Najafi
- Department of Resin and Additives, Institute for Color Science and Technology, Tehran, Iran
| | - Sima Shahabi
- Laser Research Center of Dentistry, Tehran University of Medical Science, Tehran, Iran
| | | | - Fathollah Moztarzadeh
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology, Tehran, Iran
| | - Abolfazl Yazdanpanah
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology, Tehran, Iran
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Sahin M, Schlögl S, Kalinka G, Wang J, Kaynak B, Mühlbacher I, Ziegler W, Kern W, Grützmacher H. Tailoring the interfaces in glass fiber-reinforced photopolymer composites. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.03.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Elshereksi NW, Ghazali M, Muchtar A, Azhari CH. Review of titanate coupling agents and their application for dental composite fabrication. Dent Mater J 2017; 36:539-552. [PMID: 28652551 DOI: 10.4012/dmj.2016-014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Silane is a dominant coupler that is widely used in dentistry to promote adhesion among the components of dental composites. Silica-based fillers can be easily silanized because of their similarly ordered structure. However, silane is hydrolytically degraded in the aqueous oral environment and inefficiently bonds to non-silica fillers. Thus, the development of hydrolytically stable dental composites is an important objective in the research on dental materials. Titanate coupling agents (TCAs) exhibit satisfactory interfacial bonding, enhanced homogeneous filler dispersion, and improved mechanical properties of the composites. Titanates also provide superior hydrolytic stability in wet environments, which should be considered in fabricating dental composites. The addition of a small amount of titanates can improve the resistance of the composites to moisture. This paper reviews the effects of the instability of silanes in moisture on the performance of dental composites and presents TCAs as alternative couplers to silanes for fabricating dental composites.
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Affiliation(s)
- Nidal Wanis Elshereksi
- Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia.,Department of Dental Technology, College of Medical Technology
| | - Mariyam Ghazali
- Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia
| | - Andanastuti Muchtar
- Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia
| | - Che Husna Azhari
- Department of Mechanical & Materials Engineering, Faculty of Engineering & Built Environment, Universiti Kebangsaan Malaysia
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Najafi H, Akbari B, Najafi F, Abrishamkar A, Ramedani A, Yazdanpanah A. Evaluation of relationship among filler amount, degree of conversion, and cytotoxicity: Approaching performance enhancement novel design for dental Bis-GMA/UDMA/TEGDMA composite. INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2016.1277223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Hamed Najafi
- Department of Biomedical Engineering, Tehran University, Tehran, Iran
| | - Babak Akbari
- Department of Biomedical Engineering, Tehran University, Tehran, Iran
| | - Farhood Najafi
- Department of Resin and Additives, Institute for Color Science and Technology, Tehran, Iran
| | | | - Arash Ramedani
- Institute of Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
| | - Abolfazl Yazdanpanah
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology, Tehran, Iran
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12
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Dionysopoulos D, Tolidis K, Gerasimou P. Polymerization efficiency of bulk-fill dental resin composites with different curing modes. J Appl Polym Sci 2016. [DOI: 10.1002/app.43392] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dimitrios Dionysopoulos
- Department of Operative Dentistry, School of Dentistry; Aristotle University of Thessaloniki; Thessaloniki Greece
| | - Kosmas Tolidis
- Department of Operative Dentistry, School of Dentistry; Aristotle University of Thessaloniki; Thessaloniki Greece
| | - Paris Gerasimou
- Department of Operative Dentistry, School of Dentistry; Aristotle University of Thessaloniki; Thessaloniki Greece
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13
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Hygroscopic expansion kinetics of dental resin-composites. Dent Mater 2014; 30:143-8. [DOI: 10.1016/j.dental.2013.10.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 10/30/2013] [Accepted: 10/30/2013] [Indexed: 11/17/2022]
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Florea NM, Lungu A, Vasile E, Iovu H. The influence of nanosilica functionalization on the properties of hybrid nanocomposites. HIGH PERFORM POLYM 2012. [DOI: 10.1177/0954008312455831] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The aim of this research is to evaluate the effect of silica nanoparticles (SNs) modification on the physicochemical properties of some hybrid nanocomposites. SNs with high specific surface area were silanized by two complementary mechanisms using organosilanes with different functionalities, 3-methacryloxypropyltrimethoxysilane (MPS), octyltrimethoxysilane (OTMS) or a mixture of them in order to generate a different interphase between the filler and the polymeric matrix. The SN silanization efficiency was investigated using Fourier transform infrared spectra, x-ray photoelectron spectroscopy, transmission electron microscopy and thermogravimetric analysis (TGA). Several types of hybrid nanocomposites based on dimethacrylate monomer and SN were synthesized by bulk polymerization process. The influence of the silanized SN on the methacrylic groups reactivity was studied using differential scanning calorimetry, and the thermostability of the hybrid nanocomposites was revealed by TGA. Additionally, the dynamic thermomechanical properties of the hybrid nanocomposites were determined by Dynamic Mechanical Analysis (DMA).
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Affiliation(s)
- Nicoleta-Mihaela Florea
- Advanced Polymer Materials Group, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Bucharest, Romania
| | - Adriana Lungu
- Advanced Polymer Materials Group, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Bucharest, Romania
| | - Eugeniu Vasile
- Advanced Polymer Materials Group, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Bucharest, Romania
| | - Horia Iovu
- Advanced Polymer Materials Group, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Bucharest, Romania
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15
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Dynamic mechanical properties of dental nanofilled light-cured resin composites: Effect of food-simulating liquids. J Mech Behav Biomed Mater 2012; 10:87-96. [PMID: 22520421 DOI: 10.1016/j.jmbbm.2012.02.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2012] [Revised: 02/08/2012] [Accepted: 02/09/2012] [Indexed: 11/21/2022]
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16
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Karabela MM, Sideridou ID. Synthesis and study of physical properties of dental light-cured nanocomposites using different amounts of a urethane dimethacrylate trialkoxysilane coupling agent. Dent Mater 2011; 27:1144-52. [PMID: 21920594 DOI: 10.1016/j.dental.2011.08.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2010] [Revised: 06/29/2011] [Accepted: 08/19/2011] [Indexed: 10/17/2022]
Abstract
OBJECTIVE The purpose of this work was the study of the effect of the amount of a urethane dimethacrylate silane (UDMS) coupling agent on physical properties of dental light-cured resin nanocomposites based on Bis-GMA/TEGDMA (50/50 wt/wt) matrix and Aerosil OX50 as filler. METHODS Silica nanoparticles (Aerosil OX 50) used as filler were silanized with 5 different amounts of UDMS 1.0, 2.5, 5.0, 7.5 and 10 wt% relative to silica. The silanizated silica nanoparticles were identified by FT-IR spectroscopy and thermogravimetric analysis (TGA). Then the silanized nanoparticles (60 wt%) were mixed with a Bis-GMA/TEGDMA (50/50 wt/wt) matrix. Degree of conversion of light cured composites was determined by FT-IR analysis. The static flexural strength and flexural modulus were measured using a three-point bending set up. The dynamic thermomechanical properties were determined by DMA analyzer. Measurements were taken in samples stored, immediately after curing, in water at 37°C for 24 h. Sorption, solubility and volumetric change were determined after storage of composites in water or ethanol/water of 75 vol% for 30 days. Thermogravimetric analysis of composites was performed in nitrogen atmosphere from 50 to 800°C. RESULTS Almost all of used amount of silane remained chemically bounded on the surface of silica particles, forming a layer around them, which have dense accumulation of methacrylate groups. No significant statistic difference was found to exist between the degree of conversion values of composites with different silane contents. The composite with the lowest amount of UDMS (1.0 wt%) showed the lower flexural strength value, the higher static and dynamic elastic modulus values and the higher sorbed liquid value and solubility. SIGNIFICANCE The optimum concentration of UDMS seems to be that of 2.5 wt%. Higher concentrations of UDMS did not improve the properties of composites.
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Affiliation(s)
- Maria M Karabela
- Laboratory of Organic Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki GR-54124, Greece
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Sun Z, Huang P, Gu A, Liang G, Yuan L, Dai S. Novel high-performance wave-transparent aluminum phosphate/cyanate ester composites. J Appl Polym Sci 2011. [DOI: 10.1002/app.34695] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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STUDIES ON THE INFLUENCE OF LANTHANUM GLUTAMIC DITHIOCARBAMATE ON THE INTERFACIAL REINFORNCEMENT OF SBR/SiO 2 COMPOSITES BY SWELLING EQUILIBRIUM TEST. ACTA POLYM SIN 2011. [DOI: 10.3724/sp.j.1105.2011.10184] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kinetics of the complexation of Ni2+ ions by 5-phenyl-azo-8-hydroxyquinoline grafted on colloidal silica particles. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.02.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ruggerone R, Geiser V, Dalle Vacche S, Leterrier Y, Månson JAE. Immobilized Polymer Fraction in Hyperbranched Polymer/Silica Nanocomposite Suspensions. Macromolecules 2010. [DOI: 10.1021/ma102074x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Riccardo Ruggerone
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Valérie Geiser
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Sara Dalle Vacche
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Yves Leterrier
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jan-Anders E. Månson
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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Geiser V, Leterrier Y, Månson JAE. Rheological Behavior of Concentrated Hyperbranched Polymer/Silica Nanocomposite Suspensions. Macromolecules 2010. [DOI: 10.1021/ma100569c] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Valérie Geiser
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Yves Leterrier
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Jan-Anders E. Månson
- Laboratoire de Technologie des Composites et Polymères (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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