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Alnazeh AA, Kamran MA, Almoammar S, Al Jearah MM, Qasim M, Alshahrani I. Visible light-activated curcumin-doped zinc oxide nanoparticles integrated into orthodontic adhesive on Micro-tensile bond strength, degree of conversion, and antibacterial effectiveness against Staphylococcus Aureus. An investigation using scanning electron microscopy and energy-dispersive X-ray spectroscopy. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2024; 253:112888. [PMID: 38471422 DOI: 10.1016/j.jphotobiol.2024.112888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 02/25/2024] [Accepted: 03/05/2024] [Indexed: 03/14/2024]
Abstract
AIM To acquire a thorough comprehension of the photoactivated Cur-doped ZnONPs at different concentrations 0%, 2.5%, and 5% on the physical qualities, antibacterial efficacy, degree of conversion, and μshear bond strength between orthodontic brackets and the enamel surface. MATERIAL AND METHODS An extensive investigation was carried out utilizing a range of analytical methods, scanning electron microscopy (SEM) combined with energy-dispersive X-ray spectroscopy (EDX), Fourier-transform infrared (FTIR) spectroscopy, micro tensile bond strength (μTBS) testing, and evaluation of antibacterial effectiveness. Cur-doped ZnONPs at concentrations of 2.5% and 5% were blended with Transbond XT, a light-curable orthodontic adhesive. A control group without the addition of Cur-doped ZnONPs was also prepared. The tooth samples were categorized into three groups based on the weight percentage of NPs: Group 1 (control) with 0% Cur-doped ZnONPs, Group 2 with 2.5 wt% Cur-doped ZnONPs, and Group 3 with 5 wt% Cur-doped ZnONPs. The SEM technique was employed to analyze the morphological characteristics of Cur-doped ZnONPs and ZnONPs. The composition and elemental distribution of the modified Cur-doped ZnONPs were assessed using energy-dispersive X-ray spectroscopy. The effectiveness of NPs at various concentrations against S.Mutans was gauged through the pour plate method. DC of Cur-doped ZnONPs at a region of 1608 cm-1 to 1636 cm-1 for the cured area, whereas the uncured area spanned the same range of 1608 cm-1 to 1636 cm-1 was assessed. The Adhesive Remnant Index (ARI) approach was utilized to investigate the bond failure of orthodontic brackets, while a Universal Testing Machine (UTM) was utilized to test μTBS. The Kruskal-Wallis test was employed to investigate variations in S.mutans survival rates. To determine the μTBS values, analysis of variance (ANOVA) and the post hoc Tukey multiple comparisons test were used. RESULTS The maximum μTBS was given and documented in group 3: 5 wt% Cur-doped ZnONPs (21.21 ± 1.53 MPa). The lowest μTBS was given in group 2: 2.5 wt% Cur-doped ZnONPs (19.58 ± 1.27 MPa). The highest efficacy against S.mutans was documented in group 3 in which 5 wt% Cur-doped ZnONPs (0.39 ± 0.15). The lowest efficacy was seen in group 1 in which no Cur-doped ZnONPs were used (6.47 ± 1.23). The ARI analysis indicated that the predominant failure was between scores 0 and 1 among all experimental groups. Control group 1 which was not modified showed the highest DC (73.11 ± 4.19). CONCLUSION Orthodontic adhesive, containing 5% Cur-doped ZnONPs photoactivated with visible light exhibited a favorable impact on μTBS and indicated enhanced antibacterial efficacy against S.mutans. Nevertheless, it was observed that the addition of Cur-doped ZnONPs at different concentrations (2.5%,5%) resulted in a decrease in the monomer-to-polymer ratio compromising DC.
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Affiliation(s)
- Abdullah A Alnazeh
- Department of Pedodontics and Orthodontic Sciences, College of Dentistry, King Khalid University Abha, Saudi Arabia
| | - Muhammad Abdullah Kamran
- Department of Pedodontics and Orthodontic Sciences, College of Dentistry, King Khalid University Abha, Saudi Arabia.
| | - Salem Almoammar
- Department of Pedodontics and Orthodontic Sciences, College of Dentistry, King Khalid University Abha, Saudi Arabia
| | | | - Muhammad Qasim
- Department of Operative Dentistry and Endodontics King Khalid University Abha, Saudi Arabia
| | - Ibrahim Alshahrani
- Department of Pedodontics and Orthodontic Sciences, College of Dentistry, King Khalid University Abha, Saudi Arabia
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von Bülow A, Gente R, Gente M. Extension of the working time of dental composites due to a new type of white operating lamp. BIOMED ENG-BIOMED TE 2023; 68:593-598. [PMID: 37259964 DOI: 10.1515/bmt-2022-0453] [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: 11/19/2022] [Accepted: 05/15/2023] [Indexed: 06/02/2023]
Abstract
OBJECTIVES Dental composite materials for filling teeth are usually hardened by polymerisation lamps emitting blue light. However, the same wavelength is also emitted by light of dental operating lamps for lighting the oral cavity. Thus, the hardening of the composite is already initiated earlier, shortening the time of formability. The objective of this study is to develop a specific white LED for dental operating lamps. When restoring teeth, it enables dentists to work longer on light-curing composites in the same brightness. METHODS Based on a short-wave blue coloured LED and a fluorescent substance, a white luminescent LED with a colour temperature of approx. 3,000 K is produced as a prototype. The formable working times of three composites are measured for this LED and two dental head lamps at an illuminance of 10,000 lx. RESULTS Shorter working times of 98-237 s were measured for the headlamps and 409-807 s for the new LED. This light of the new LED is perceived by the human eye as warm white. CONCLUSIONS The new LED extends the working time by the factor of 3.0 to 5.8 compared to the head lamps. This enables more precise modelling of fillings.
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Affiliation(s)
- Albrecht von Bülow
- Department of Orofacial Prosthodontics and Craniomandibular Function, Philipps University of Marburg, Marburg, Germany
| | - Ralf Gente
- Department of Physics, Philipps University of Marburg, Marburg, Germany
| | - Michael Gente
- Department of Orofacial Prosthodontics and Craniomandibular Function, Philipps University of Marburg, Marburg, Germany
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Martinez-Gonzalez M, Fidalgo-Pereira RC, Torres O, Silva F, Henriques B, Özcan M, Souza JCM. Toxicity of resin-matrix cements in contact with fibroblast or mesenchymal cells. Odontology 2023; 111:310-327. [PMID: 36370322 DOI: 10.1007/s10266-022-00758-w] [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: 04/04/2022] [Accepted: 10/12/2022] [Indexed: 11/13/2022]
Abstract
The main aim of this study was to perform an integrative review on the toxic effects of resin-matrix cements and their products in contact with fibroblasts or mesenchymal cells. A bibliographic search was performed on PubMed using the following search terms: "cytotoxicity" AND "fibroblast" OR "epithelial" OR "mesenchymal" AND "polymerization" OR "degree of conversion" OR "methacrylate" OR "monomer" AND "resin cement" OR "resin-based cement". The initial search in the available database yielded a total of 277 articles of which 21 articles were included in this review. A decrease in the viability of mouse fibroblasts ranged between 13 and 15% that was recorded for different resin-matrix cements after light curing exposure for 20 s. The viability of human fibroblasts was recorded at 83.11% after light curing for 20 s that increased up to 90.9% after light curing exposure for 40 s. Most of the studies linked the highest toxicity levels when the cells were in contact with Bis-GMA followed by UDMA, TEGDMA and HEMA. Resin-matrix cements cause a cytotoxic reaction when in contact with fibroblasts or mesenchymal cells due to the release of monomers from the polymeric matrix. The amount of monomers released from the resin matrix and their cytotoxicity depends on the polymerization parameters.
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Affiliation(s)
| | - Rita C Fidalgo-Pereira
- University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra PRD, Portugal
- Faculty of Dental Medicine, Universidade Católica Portuguesa, 3504-505, Viseu, Portugal
| | - Orlanda Torres
- University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra PRD, Portugal
| | - Filipe Silva
- Center for Micro Electro Mechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal
- Associate Laboratory (LABBELS), University of Minho, 4710-057, Guimarães, Braga, Portugal
| | - Bruno Henriques
- Center for Micro Electro Mechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal
- Ceramic and Composite Materials Research Group (CERMAT), Federal University of Santa Catarina (UFSC), Campus Trindade, Florianópolis, SC, 88040-900, Brazil
| | - Mutlu Özcan
- Division of Dental Biomaterials, Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, 8032, Zurich, Switzerland
| | - Júlio C M Souza
- University Institute of Health Sciences (IUCS), CESPU, 4585-116, Gandra PRD, Portugal.
- Center for Micro Electro Mechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058, Guimarães, Portugal.
- Associate Laboratory (LABBELS), University of Minho, 4710-057, Guimarães, Braga, Portugal.
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Impact of curcumin loading on the physicochemical, mechanical and antimicrobial properties of a methacrylate-based experimental dental resin. Sci Rep 2022; 12:18691. [PMID: 36333357 PMCID: PMC9636433 DOI: 10.1038/s41598-022-21363-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 09/26/2022] [Indexed: 11/06/2022] Open
Abstract
Oral biofilms are directly linked to one of the most common chronic human diseases, dental caries. Resin-based dental materials have significant potential to replace amalgam, however they lack sufficient antimicrobial power. This innovative study investigates a curcumin-loaded dental resin which can be utilized in an antimicrobial photodynamic therapy (aPDT) approach. The study evaluated the effects of curcumin loading on resin physicochemical, mechanical, and adhesive properties, as well as the antimicrobial response associated with blue light activation. Preliminary tests involving degree of conversion (DC) and sample integrity determined the optimal loading of curcumin to be restricted to 0.05 and 0.10 wt%. These optimal loadings were tested for flexural strength (FS), water sorption (WS) and solubility (SL), shear bond strength to dentin (SBS), and viability of Streptococcus mutans under 14.6 J/cm2 blue light or dark conditions, in 6 h and 24 h biofilms. The results demonstrated that 0.10 wt% curcumin had minimal impact on either FS or SBS, but detectably increased WS and SL. A 2 log10 (CFU/mL) reduction in S. mutans after light application in both 6 h and 24 h biofilms were corroborated by CLSM imaging and highlighted the significant potential of this novel aPDT approach with resin-based dental materials.
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Bioinspired Techniques in Freeze Casting: A Survey of Processes, Current Advances, and Future Directions. INT J POLYM SCI 2022. [DOI: 10.1155/2022/9169046] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Freeze casting, popularly known as ice templating or freeze gelation, is a mechanical method to fabricate scaffolds of desirable properties and materials. Aerospace engineering, the healthcare sector, manufacturing department, and automotive industries are the different fields where freeze casting has been used. Bioinspiration refers to the translation of biological systems into new and innovative creations. Bioinspired materials are extensively used in freeze casting methods such as ceramide, spines of porcupine fish, and collagen. Due to the tunable properties and production of complex structures with ease, biomaterials have found numerous applications in the ice templating method. This review rigorously explains the freeze casting process and the effect of thermal conductivity, stress, and electrostatic repulsion on the porous materials. Also, we have discussed the different biomaterial polymers used in freeze casting along with different methods involved.
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Visible light-induced crosslinking of unmodified gelatin with PEGDA for DLP-3D printable hydrogels. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110813] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Sprick E, Becht JM, Graff B, Salomon JP, Tigges T, Weber C, Lalevée J. New hydrogen donors for amine-free photoinitiating systems in dental materials. Dent Mater 2021; 37:382-390. [PMID: 33468405 DOI: 10.1016/j.dental.2020.12.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/29/2020] [Accepted: 12/31/2020] [Indexed: 11/16/2022]
Abstract
OBJECTIVES The two-component Camphorquinone (CQ)/aromatic amine system is well-established and clearly corresponds to the reference system used in all photopolymerizable dental adhesives and composites. However, this CQ/amine system still suffers from the presence of aromatic amines that can be referenced as toxic. Therefore, the aim of this work is to develop amine-free photoinitiating systems (PISs) for the polymerization of a representative dental methacrylate resins upon blue light irradiation. The proposed strategy is based on the in-silico design (by molecular modelling) of new hydrogen donors (amine-free) bearing a copolymerizable moiety (methacrylate functionality) to ensure their low migration/leaching properties from the synthesized polymer. The new proposed PISs are compared to the well-established CQ/amine system for the polymerization of different methacrylate blends upon exposure to a commercial blue dental LED centered at 477 nm. METHODS Molecular orbitals calculations are used to design new hydrogen donors exhibiting low C-H bond dissociation energies. Based on this in-silico design, the syntheses of new co-initiators are reported here for the first time. Real-time FTIR experiments are used to monitor the photopolymerization profiles. Color indexes measurements were also carried out to investigate the bleaching properties of the new proposed systems. RESULTS Three new co-initiators are proposed as alternatives to aromatic amines in dental materials in combination with camphorquinone. The performances of the new proposed amine-free PISs for the photopolymerization of thick (1.4 mm) samples of methacrylate upon exposure to a blue dental LED under air are excellent. Similar or better polymerization performances are obtained with the new proposed amine-free systems compared to those reached with the CQ/amine reference. Excellent bleaching properties are also found. The involved chemical mechanisms are investigated through molecular orbitals calculations.
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Affiliation(s)
- Elodie Sprick
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 68100 Mulhouse, France; Université de Strasbourg, 67000 Strasbourg, France
| | - Jean-Michel Becht
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 68100 Mulhouse, France; Université de Strasbourg, 67000 Strasbourg, France
| | - Bernadette Graff
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 68100 Mulhouse, France; Université de Strasbourg, 67000 Strasbourg, France
| | - Jean-Pierre Salomon
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 68100 Mulhouse, France; Université de Strasbourg, 67000 Strasbourg, France; Faculty of Dentistry, University of Lorraine, France; Oregon Health and Science University, Portland, Oregon, USA
| | - Thomas Tigges
- Dentsply Sirona, De-Trey-Straβe 1, 78467 Konstanz, Germany
| | | | - Jacques Lalevée
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, 68100 Mulhouse, France; Université de Strasbourg, 67000 Strasbourg, France.
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Noirbent G, Dumur F. Photoinitiators of polymerization with reduced environmental impact: Nature as an unlimited and renewable source of dyes. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2020.110109] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Karamishamloo M, Mirmohammadi SA, Davachi SM. Polyethylene glycol/polyhedral oligomeric silsesquioxane as an
in situ
photocrosslinkable polymeric nanohybrid. POLYM INT 2020. [DOI: 10.1002/pi.5981] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Morteza Karamishamloo
- Department of Chemical EngineeringCentral Tehran Branch, Islamic Azad University Tehran Iran
| | - Seyed Amin Mirmohammadi
- Department of Chemical EngineeringCentral Tehran Branch, Islamic Azad University Tehran Iran
| | - Seyed Mohammad Davachi
- Soft Tissue Engineering Research CenterTissue Engineering and Regenerative Medicine Institute, Central Tehran Branch, Islamic Azad University Tehran Iran
- Department of Food ScienceCollege of Agriculture and Life Science, Cornell University Ithaca NY USA
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Kamoun EA, El-Betany A, Menzel H, Chen X. Influence of photoinitiator concentration and irradiation time on the crosslinking performance of visible-light activated pullulan-HEMA hydrogels. Int J Biol Macromol 2018; 120:1884-1892. [DOI: 10.1016/j.ijbiomac.2018.10.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 09/10/2018] [Accepted: 10/01/2018] [Indexed: 10/28/2022]
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Kamoun EA, Abu-Saied M, Doma A, Menzel H, Chen X. Influence of degree of substitution and folic acid coinitiator on pullulan-HEMA hydrogel properties crosslinked under visible-light initiating system. Int J Biol Macromol 2018; 116:1175-1185. [DOI: 10.1016/j.ijbiomac.2018.05.100] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 05/03/2018] [Accepted: 05/15/2018] [Indexed: 10/16/2022]
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Bouzrati-Zerelli M, Kirschner J, Fik CP, Maier M, Dietlin C, Morlet-Savary F, Fouassier JP, Becht JM, Klee JE, Lalevée J. Silyl Glyoxylates as a New Class of High Performance Photoinitiators: Blue LED Induced Polymerization of Methacrylates in Thin and Thick Films. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01370] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Mariem Bouzrati-Zerelli
- Institut
de Science des Matériaux de Mulhouse IS2M, UMR CNRS 7361, UHA, 15, rue Jean Starcky, Cedex 68057 Mulhouse, France
| | - Julie Kirschner
- Institut
de Science des Matériaux de Mulhouse IS2M, UMR CNRS 7361, UHA, 15, rue Jean Starcky, Cedex 68057 Mulhouse, France
| | - Christoph P. Fik
- Dentsply Sirona
Restorative, De-Trey-Str. 1, 78467 Konstanz, Germany
| | - Maximilian Maier
- Dentsply Sirona
Restorative, De-Trey-Str. 1, 78467 Konstanz, Germany
| | - Celine Dietlin
- Institut
de Science des Matériaux de Mulhouse IS2M, UMR CNRS 7361, UHA, 15, rue Jean Starcky, Cedex 68057 Mulhouse, France
| | - Fabrice Morlet-Savary
- Institut
de Science des Matériaux de Mulhouse IS2M, UMR CNRS 7361, UHA, 15, rue Jean Starcky, Cedex 68057 Mulhouse, France
| | - Jean Pierre Fouassier
- Institut
de Science des Matériaux de Mulhouse IS2M, UMR CNRS 7361, UHA, 15, rue Jean Starcky, Cedex 68057 Mulhouse, France
| | - Jean-Michel Becht
- Institut
de Science des Matériaux de Mulhouse IS2M, UMR CNRS 7361, UHA, 15, rue Jean Starcky, Cedex 68057 Mulhouse, France
| | - Joachim E. Klee
- Dentsply Sirona
Restorative, De-Trey-Str. 1, 78467 Konstanz, Germany
| | - Jacques Lalevée
- Institut
de Science des Matériaux de Mulhouse IS2M, UMR CNRS 7361, UHA, 15, rue Jean Starcky, Cedex 68057 Mulhouse, France
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Mirmohammadi SA, Nekoomanesh-Haghighi M, Mohammadian Gezaz S, Bahri-Laleh N, Atai M. In-situ photocrosslinkable nanohybrid elastomer based on polybutadiene/polyhedral oligomeric silsesquioxane. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:530-539. [PMID: 27524051 DOI: 10.1016/j.msec.2016.06.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Revised: 05/21/2016] [Accepted: 06/07/2016] [Indexed: 10/21/2022]
Abstract
Hydroxyl functionalized nano-sized POSS or ethyleneglycol as diol monomers was incorporated to hydroxyl-terminated polybutadiene (HTPBD) chain in the presence of fumaryl chloride as extender. Blue light photocrosslinking system based on camphorquinone (photoinitiator) and dimethylaminoethyl methacrylate (accelerator) was applied to cure these two synthesized fumarate based macromers. Self-crosslinkability of unsaturated macromers and also crosslinking in presence of a reactive diluent were investigated in absence and presence of 1,4-butanediol dimethacrylate, respectively. Finally, photocured samples were characterized by XRD, SEM, equilibrium swelling study, TGA, DMTA, AFM and cell culture. The results showed that incorporation of POSS nanoparticle into the polymer matrix with a perfect distribution and dispersion can enhance thermal stability, mechanical and biocompatibility properties which can prove a good potential of this in-situ photocrosslinkable nanohybrid in medical applications.
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Affiliation(s)
- Seyed Amin Mirmohammadi
- Department of Polymerization Engineering, Iran Polymer and Petrochemical Institute (IPPI), P. O. Box: 14965/115, Tehran, Iran.
| | - Mehdi Nekoomanesh-Haghighi
- Department of Polymerization Engineering, Iran Polymer and Petrochemical Institute (IPPI), P. O. Box: 14965/115, Tehran, Iran.
| | | | - Naeimeh Bahri-Laleh
- Department of Polymerization Engineering, Iran Polymer and Petrochemical Institute (IPPI), P. O. Box: 14965/115, Tehran, Iran
| | - Mohammad Atai
- Department of Polymer Science, Iran Polymer and Petrochemical Institute (IPPI), P. O. Box: 14965/115, Tehran, Iran
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Bouzrati-Zerelli M, Maier M, Fik CP, Dietlin C, Morlet-Savary F, Fouassier JP, Klee JE, Lalevée J. A low migration phosphine to overcome the oxygen inhibition in new high performance photoinitiating systems for photocurable dental type resins. POLYM INT 2016. [DOI: 10.1002/pi.5262] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Mariem Bouzrati-Zerelli
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361, UHA; 15 rue Jean Starcky 68057 Mulhouse Cedex France
| | | | | | - Céline Dietlin
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361, UHA; 15 rue Jean Starcky 68057 Mulhouse Cedex France
| | - Fabrice Morlet-Savary
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361, UHA; 15 rue Jean Starcky 68057 Mulhouse Cedex France
| | - Jean Pierre Fouassier
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361, UHA; 15 rue Jean Starcky 68057 Mulhouse Cedex France
| | | | - Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361, UHA; 15 rue Jean Starcky 68057 Mulhouse Cedex France
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Graff B, Klee JE, Fik C, Maier M, Fouassier JP, Lalevée J. Development of Novel Photoinitiators as Substitutes of Camphorquinone for the LED Induced Polymerization of Methacrylates: A Bis-Silyl Ketone. Macromol Rapid Commun 2016; 38. [DOI: 10.1002/marc.201600470] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 08/10/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Bernadette Graff
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361, UHA; 15, rue Jean Starcky 68057 Mulhouse Cedex France
| | | | | | | | - Jean Pierre Fouassier
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361, UHA; 15, rue Jean Starcky 68057 Mulhouse Cedex France
| | - Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361, UHA; 15, rue Jean Starcky 68057 Mulhouse Cedex France
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Kamoun EA, Winkel A, Eisenburger M, Menzel H. Carboxylated camphorquinone as visible-light photoinitiator for biomedical application: Synthesis, characterization, and application. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2014.03.008] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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A novel photoinitiating system producing germyl radicals for the polymerization of representative methacrylate resins: Camphorquinone/R3GeH/iodonium salt. Dent Mater 2016; 32:1226-1234. [PMID: 27567540 DOI: 10.1016/j.dental.2016.07.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 06/30/2016] [Accepted: 07/16/2016] [Indexed: 11/22/2022]
Abstract
OBJECTIVES The aim of our study is to find an amine free photoinitiating system (PIS) for the polymerization of representative dental methacrylate resins. A photoinitiating system (PIS) based on camphorquinone (CQ)/triphenylgermanium hydride/diphenyl iodonium hexafluorophosphate is proposed and compared to the conventional CQ/amine couple. The polymerization monitoring of thin (∼20μm) and thick (1.4mm) samples of a bisphenol A-glycidyl methacrylate (Bis-GMA)/triethyleneglycol dimethacrylate (TEGDMA) blend (70%/30% w/w) and of a urethane dimethacrylate (UDMA) upon exposure to a commercial blue LED centered at 477nm under air or in laminate is described. Finally, the impact of the photoinitiating system composition on the final polymer color is evaluated in detail. METHODS FTIR and DSC experiments are used to record the photopolymerization profiles. ESR spectrometry and steady state photolysis are used to detect the produced radicals. Color measurements are carried out to determine the key parameters in the bleaching of the different dental formulations. RESULTS The efficiency of the newly proposed PISs for the photopolymerization of BisGMA/TEGDMA and UDMA for thin (20μm) or for thick (1.4mm) samples upon exposure to a dental blue LED under air is excellent. It is noticeably higher than that of the CQ/amine reference couple. Excellent bleaching properties are also observed under irradiation in presence of the new PISs. A good correlation is found between the sample bleaching and the amount of Ph3GeH in the formulation. The excited state processes could be established. The overall chemical mechanisms for the initiation step were also clarified.
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Photopolymerization of highly filled dimethacrylate-based composites using Type I or Type II photoinitiators and varying co-monomer ratios. Dent Mater 2016; 32:136-48. [DOI: 10.1016/j.dental.2015.11.032] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/25/2015] [Accepted: 11/30/2015] [Indexed: 11/22/2022]
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Fornaini C, Lagori G, Merigo E, Rocca JP, Chiusano M, Cucinotta A. 405 nm diode laser, halogen lamp and LED device comparison in dental composites cure: an "in vitro" experimental trial. Laser Ther 2015; 24:265-74. [PMID: 26877591 PMCID: PMC4751091 DOI: 10.5978/islsm.15-or-16] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 10/21/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND AIMS A 405 nm diode laser is indicated for composite materials polymerizing, thanks to the recent evolution in their compositions, absorbing in blue part of the spectrum. The purpose of this research was to evaluate its performance on two different kinds of composite resins. MATERIALS AND METHODS Two different composites were polymerized with a traditional halogen lamp, a LED device and a 405 nm diode laser. The depth of the cure, the volumetric shrinkage, and the degree of the conversion (DC%) of the double bond during the curing process were measured. One-way ANOVA test, Kruskal-Wallis tests, and Dunn comparison tests were used for statistic analysis. RESULTS Regarding the depth of polymerization, the laser had the worst performance on one composite while on the other, no significant difference with the other devices was observed. The volumetric shrinkage showed that laser produced the lowest change in both of the composites. The DC% measure confirmed these findings. CONCLUSIONS Based on the results of this preliminary study, it is not possible to recommend the 405 nm diode laser for the polymerization of dental composites.
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Affiliation(s)
- C. Fornaini
- Group of Applied ElectroMagnetic, Information Engineering Department, University of Parma, Parma, Italy
- Micoralis Laboratory, Faculty of Dentistry, University of Nice, Nice, France
| | - G. Lagori
- Micoralis Laboratory, Faculty of Dentistry, University of Nice, Nice, France
| | - E. Merigo
- Micoralis Laboratory, Faculty of Dentistry, University of Nice, Nice, France
| | - J-P. Rocca
- Micoralis Laboratory, Faculty of Dentistry, University of Nice, Nice, France
| | - M. Chiusano
- Micoralis Laboratory, Faculty of Dentistry, University of Nice, Nice, France
| | - A. Cucinotta
- Group of Applied ElectroMagnetic, Information Engineering Department, University of Parma, Parma, Italy
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Morlet-Savary F, Klee JE, Pfefferkorn F, Fouassier JP, Lalevée J. The Camphorquinone/Amine and Camphorquinone/Amine/Phosphine Oxide Derivative Photoinitiating Systems: Overview, Mechanistic Approach, and Role of the Excitation Light Source. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500184] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Fabrice Morlet-Savary
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361; UHA, 15, rue Jean Starcky 68057 Mulhouse CEDEX France
| | | | | | - Jean Pierre Fouassier
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361; UHA, 15, rue Jean Starcky 68057 Mulhouse CEDEX France
| | - Jacques Lalevée
- Institut de Science des Matériaux de Mulhouse IS2M; UMR CNRS 7361; UHA, 15, rue Jean Starcky 68057 Mulhouse CEDEX France
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21
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Lucey SM, Santini A, Roebuck EM. Degree of conversion of resin-based materials cured with dual-peak or single-peak LED light-curing units. Int J Paediatr Dent 2015; 25:93-102. [PMID: 24666808 DOI: 10.1111/ipd.12104] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND There is a lack of data on polymerization of resin-based materials (RBMs) used in paediatric dentistry, using dual-peak light-emitting diode (LED) light-curing units (LCUs). OBJECTIVE To evaluate the degree of conversion (DC) of RBMs cured with dual-peak or single-peak LED LCUs. METHODS Samples of Vit-l-escence (Ultradent) and Herculite XRV Ultra (Kerr) and fissure sealants Delton Clear and Delton Opaque (Dentsply) were prepared (n = 3 per group) and cured with either one of two dual-peak LCUs (bluephase(®) G2; Ivoclar Vivadent or Valo; Ultradent) or a single-peak (bluephase(®) ; Ivoclar Vivadent). High-performance liquid chromatography and nuclear magnetic resonance spectroscopy were used to confirm the presence or absence of initiators other than camphorquinone. The DC was determined using micro-Raman spectroscopy. Data were analysed using general linear model anova; α = 0.05. RESULTS With Herculite XRV Ultra, the single-peak LCU gave higher DC values than either of the two dual-peak LCUs (P < 0.05). Both fissure sealants showed higher DC compared with the two RBMs (P < 0.05); the DC at the bottom of the clear sealant was greater than the opaque sealant, (P < 0.05). 2,4,6-trimethylbenzoyldiphenylphosphine oxide (Lucirin(®) TPO) was found only in Vit-l-escence. CONCLUSIONS Dual-peak LED LCUs may not be best suited for curing non-Lucirin(®) TPO-containing materials. A clear sealant showed a better cure throughout the material and may be more appropriate than opaque versions in deep fissures.
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Affiliation(s)
- Siobhan M Lucey
- Department of Paediatric Dentistry, Edinburgh Dental Institute, Edinburgh, UK
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22
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Santini A, McGuinness N, Nor NAM. Degree of conversion of resin-based orthodontic bonding materials cured with single-wave or dual-wave LED light-curing units. J Orthod 2014; 41:292-8. [PMID: 25074905 DOI: 10.1179/1465313314y.0000000101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
AIM To evaluate the degree of conversion (DC) of orthodontic adhesives (RBOAs) cured with dual peak or single peak light-emitting diode (LED) light-curing units (LCUs). MATERIALS AND METHODS Standardized samples of RBOAs, APCPlus, Opal® Bond® and LightBond(TM) were prepared (n = 3) and cured with one of two dual peak LCUs (bluephase® G2-Ivoclar-Vivadent or Valo-Ultradent) or a single peak control (bluephase® Ivoclar-Vivadent). The DC was determined using micro-Raman spectroscopy. The presence or absence of initiators other than camphorquinone was confirmed by high-performance liquid chromatography and nuclear magnetic resonance spectroscopy. Data were analysed using general linear model in Minitab 15 (Minitab Inc., State College, PA, USA). RESULTS There was no significant difference in DC between APCPlus, and Opal® Bond (confidence interval: -3.89- to 2.48); significant difference between APCPlus and LightBond(TM) (-18.55 to -12.18) and Opal® Bond and Lightbond(TM) (-17.85 to -11.48); no significant difference between bluephase (single peak) and dual peak LCUs, bluephase G2 (-4.896 to 1.476) and Valo (-3.935 to 2.437) and between bluephase G2 and Valo (-2.225 to 4.147). APCPlus and Opal® Bond showed higher DC values than LightBond(TM) (P<0.05). Lucirin® TPO was found only in Vit-l-escence. CONCLUSION Lucirin® TPO was not identified in the three orthodontic adhesives. All three LCUs performed similarly with the orthodontic adhesives: orthodontic adhesive make had a greater effect on DC than the LCUs. It is strongly suggested that manufacturers of resin-based orthodontic materials test report whether or not dual peak LCUs should be used with their materials. Dual peak LED LCUs, though suitable in the majority of cases, may not be recommended for certain non Lucirin® TPO-containing materials.
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Affiliation(s)
- Ario Santini
- Director Biomaterial Research, Edinburgh Dental Institute, Lauriston Buildings, Lauriston Place, Edinburgh EH3 9HA
| | - Niall McGuinness
- Orthodontic Consultant , Edinburgh Dental Institute, Lauriston Buildings, Lauriston Place, Edinburgh EH3 9HA
| | - Noor Azreen Md Nor
- Postgraduate Student, Department of Orthodontics, Edinburgh Dental Institute, Lauriston Buildings, Lauriston Place, Edinburgh EH3 9HA
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Abstract
Polymerization of Resin Based Composites (RBCs) initiated by a light curing unit activating photoinitiators. Different RBCs require different light energy levels for proper curing. Manufacturers are now producing RBCs with more than one initiator and not all of these will be properly polymerised with blue LED lights. An added problem is that manufacturers do not always indicate the type of photoinitiators in their materials. This review discusses the importance of matching the spectral output of LCUs to the absorption spectra of RBCs and the consequences of spectral mismatch. Resin based composites (RBCs) were first introduced in the 1960s and with development of effective and reliable dentine bonding systems2, have been used routinely as a filling material for both anterior and posterior teeth. The early RBCs were either chemically cured two component materials or photo-initiated materials that used UV initiators in the beginning and then transitioned to visible light initiators such as camphorquinine which was introduced in 1978.3 The first report of a light curing material was of an ultraviolet (UV) cured fissure sealant. However, due to the limited penetration depth of the UV light and the potential health hazards, this system was quickly abandoned. The advancement of science yielded light curing materials which contributed to a significant clinical progress over the UV and chemically cured RBCs. Additional advancements to direct RBC restoration materials included luting agents for ceramic restorations, pit and fissure sealants and resin modified glass ionomers. Polymerization in an RBC is initiated by a light curing unit (LCU); this technology is based on the use of photoreactive systems that absorb light irradiation from the LCUs at appropriate wavelength. Then the photoinitiators contained in the RBCs, absorb the incoming photons from the LCU and the monomers in the molecular structure become excited and in that active state, there is a change from monomers into a polymer network. The success of this technology hinges on matching the spectral emission of the LCU with the requirements of the photoinitiator system to convert the monomers into a polymer network. The amount of activated photo initiator depends on the concentration of photoinitiator in the material, the number of photons to which the material is exposed and the energy of the photons (wavelength), the latter depending on the curing light.The most common photoinitiator in dental materials today is camphorquinone, which has a peak activity around 470 nanometres. The factors affecting polymerization include filler type, size and loading, the thickness and shade of the restorative material, the effectiveness of light transmission (eg. light guide tips being free from debris and scratches), exposure time, distance of the light source from the restorative material and light intensity. It is important to note that the photoinitiator activation occurs at specific wavelengths, in other words, the optimum efficiency is obtained when the peak absorptivity of the photoinitiator corresponds with the spectral emission from the LCU. Commercially available curing units have different light intensities and light sources, with energy levels in QTH, LED and other LCUs ranging from 300 to more than 2000 mW/cm.
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Affiliation(s)
- Ario Santini
- Biomaterials Research, Edinburgh Dental Institute, The University of Edinburgh, UK
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Shao J, Huang Y, Fan Q. Visible light initiating systems for photopolymerization: status, development and challenges. Polym Chem 2014. [DOI: 10.1039/c4py00072b] [Citation(s) in RCA: 156] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A review of recent advances in visible light initiating systems using free radical, cationic and hybrid photoinitiators is presented.
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Affiliation(s)
- Jianzhong Shao
- Engineering Research Center for Eco-Dyeing & Finishing of Textiles
- Ministry of Education of China
- Zhejiang Sci-Tech University
- Hangzhou 310018, China
| | - Yi Huang
- Engineering Research Center for Eco-Dyeing & Finishing of Textiles
- Ministry of Education of China
- Zhejiang Sci-Tech University
- Hangzhou 310018, China
| | - Qinguo Fan
- Engineering Research Center for Eco-Dyeing & Finishing of Textiles
- Ministry of Education of China
- Zhejiang Sci-Tech University
- Hangzhou 310018, China
- Department of Bioengineering
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Color stability, conversion, water sorption and solubility of dental composites formulated with different photoinitiator systems. J Dent 2012; 41 Suppl 3:e67-72. [PMID: 23228497 DOI: 10.1016/j.jdent.2012.11.020] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Revised: 11/06/2012] [Accepted: 11/27/2012] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES The aim of this study was to formulate materials with high color stability and reduced degradation by using photoinitiator systems derived from phosphine oxides alternative to the traditional camphorquinone (CQ)/amine system. METHODS Materials were formulated with the monomers BisGMA and TEGDMA as organic matrix. The photoinitiators tested were CQ+amine (EDMAB), phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (BAPO), BAPO+EDMAB, diphenyl(2,4,6-trimethylbenzoyl)-phosphine oxide (TPO) and TPO+EDMAB. A 60% mass of silanated glass filler particles was added. Degree of CC conversion was evaluated by Fourier-transformed infrared spectroscopy 10min after photopolymerization. The color properties were evaluated by a digital spectrophotometer, applying the CIELab parameters, either before photoactivation, immediately after photoactivation, 24h after dry storage, and one month after water immersion. Water sorption and solubility were assessed by mass gain or loss after storage in water for 30 days. Data were analyzed using ANOVA and Tukey's test (5%). RESULTS Degree of conversion did not differ statistically among all the tested formulations. Regarding color, only groups with TPO presented satisfactory color stability after one month of water storage (ΔE<3.3). Water sorption and water stability did not differ among the groups. CONCLUSIONS Degree of conversion, water sorption and water solubility did not differ among all the tested groups. The TPO-based groups were the only materials with satisfactory color stability after one month of water storage. CLINICAL SIGNIFICANCE The use of a photoinitiator system containing TPO might improve the color stability of resin composites compared with the traditional CQ/amine system while attaining similar physico-chemical properties for the composite.
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Moszner N, Hirt T. New polymer-chemical developments in clinical dental polymer materials: Enamel-dentin adhesives and restorative composites. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26260] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Micro-Raman spectroscopic analysis of the degree of conversion of composite resins containing different initiators cured by polywave or monowave LED units. J Dent 2012; 40:106-13. [DOI: 10.1016/j.jdent.2011.10.018] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Revised: 10/28/2011] [Accepted: 10/30/2011] [Indexed: 11/21/2022] Open
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28
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MILETIC V, SANTINI A. Optimizing the concentration of 2,4,6-trimethylbenzoyldiphenylphosphine oxide initiator in composite resins in relation to monomer conversion. Dent Mater J 2012; 31:717-23. [DOI: 10.4012/dmj.2012-064] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ikemura K, Endo T. A review of the development of radical photopolymerization initiators used for designing light-curing dental adhesives and resin composites. Dent Mater J 2010; 29:481-501. [PMID: 20859059 DOI: 10.4012/dmj.2009-137] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This paper reviews our recent studies on radical photopolymerization initiators, which are used in the design of light-curing dental adhesives and resin composites, by collating information of related studies from original scientific papers, reviews, and patent literature. The photopolymerization reactivities of acylphosphine oxide (APO) and bisacylphosphine oxide (BAPO) derivatives, and D,L-camphorquinone (CQ)/tertiary amine were investigated, and no significant differences in degree of conversion (DC) were found between BAPO and CQ/amine system (p>0.05). In addition, a novel 7,7-dimethyl-2,3-dioxobicyclo[2.2.1]heptane-1-carbonyldiphenyl phosphine oxide (DOHC-DPPO=CQ-APO) was synthesized and its ultraviolet and visible (UV-VIS) spectral behavior was investigated. CQ-APO possessed two maximum absorption wavelengths (λmax) at 350-500 nm [372 nm (from APO group) and 475 nm (from CQ moiety)], and CQ-APO-containing resins exhibited good photopolymerization reactivity, excellent color tone, relaxed operation time, and high mechanical strength. It was also found that a newly synthesized, water-soluble photoinitiator (APO-Na) improved adhesion to ground dentin.
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Affiliation(s)
- Kunio Ikemura
- Department of Research and Development, Shofu Inc., 11 Kamitakamatsu-cho, Fukuine, Higashiyama-ku, Kyoto 605-0983, Japan.
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