1
|
Caroprese AC, Navarrete ANC, Prieto SJG, Villamil JC, Uribe OAC, Reyes JCS, Pinzón AHAM. Cytotoxic effects on human dental pulp stem Cells after exposure to adhesive bonding agents. Braz Dent J 2024; 35:e245529. [PMID: 38922248 PMCID: PMC11196030 DOI: 10.1590/0103-6440202405529] [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: 04/21/2023] [Accepted: 12/18/2023] [Indexed: 06/27/2024] Open
Abstract
Studies regarding cytotoxic effects attributed to the use of adhesive bonding agents on pulp tissue are not conclusive. To point out whether these materials are safe for clinical use, in vivo exposure of dental pulp to adhesive bonding agents was simulated using an experimental setup in which Human Dental Pulp Stem Cells (hDPSC) are exposed to the action of two kinds of adhesives: self-etching adhesives and two-step bonding agents through a dentine barrier. Cytotoxic effects on these cells were evaluated by MTT assay protocol and fluorescence microscopy, and their results were contrasted to those obtained through Raman spectra taken on single hDPSCs. Overall, no significant cytotoxic effects were observed by combining all the techniques, and cell viability close to 90% was achieved for a dentine barrier of at least 1 mm thick. Moreover, Raman spectroscopy was able to detect structural DNA damage in some dental pulp cells when exposed to two-step bonding agents, suggesting that this technique could be considered a complementary tool with the potential to evaluate cell toxicity beyond cell viability.
Collapse
Affiliation(s)
| | | | - Sandra Janeth Gutiérrez Prieto
- Centro de Investigaciones Odontológicas, Facultad de Odontología, Pontificia Universidad Javeriana, BogotáD.C., Colombia
| | - Jean Carlos Villamil
- Centro de Investigaciones Odontológicas, Facultad de Odontología, Pontificia Universidad Javeriana, BogotáD.C., Colombia
| | | | - Juan Carlos Salcedo Reyes
- Grupo de Películas delgadas y Nanofotónica, Departamento de Física, Pontificia Universidad Javeriana, BogotáD.C., Colombia
| | | |
Collapse
|
2
|
da Silva EM, Amaral CM, Jardim RN, Barbosa MP, Rabello TB. Influence of Specimen Dimension, Water Immersion Protocol, and Surface Roughness on Water Sorption and Solubility of Resin-Based Restorative Materials. MATERIALS (BASEL, SWITZERLAND) 2024; 17:984. [PMID: 38473457 DOI: 10.3390/ma17050984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/16/2024] [Accepted: 02/18/2024] [Indexed: 03/14/2024]
Abstract
The evaluation of water sorption and solubility is pivotal for the development of new resin-based restorative materials with the potential for clinical application. The purpose of the present study was to evaluate the influence of the specimen dimension, water immersion protocol, and surface roughness on the water sorption and solubility of three resin-based restorative materials. Disk-shaped specimens of 15 mm × 1 mm, 10 mm × 1 mm, and 6 mm × 1 mm were produced with a composite resin (Z100), a resin cement (RelyX ARC), and an adhesive system (Single Bond 2-SB2). The specimens were immersed in distilled water according to four protocols: ISO (all the specimens for each group were vertically immersed in 50 mL); IV-10 (the specimens were individually and vertically immersed in 10 mL); IH-10 (the specimens were individually and horizontally immersed in 10 mL); and IH-2 (the specimens were individually and horizontally immersed in 2 mL). The surface roughness (Sa and Sp) was evaluated using an atomic force microscope, and the degree of conversion was determined using FT-IR spectrometry. The specimen dimension and water immersion protocol had no effect on water sorption and solubility. For the three resin-based restorative materials, Sp was higher than Sa. The degree of conversion was not influenced by the specimen dimension. The variations in the specimen dimension and water immersion protocol compared to those determined by ISO 4049 did not prevent the comparison between the values of water sorption and solubility obtained for a given resin-based restorative material.
Collapse
Affiliation(s)
- Eduardo Moreira da Silva
- Analytical Laboratory of Restorative Biomaterials-LABiom-R, Faculdade de Odontologia, Universidade Federal Fluminense, Niterói 24040-110, Brazil
| | - Cristiane Mariote Amaral
- Analytical Laboratory of Restorative Biomaterials-LABiom-R, Faculdade de Odontologia, Universidade Federal Fluminense, Niterói 24040-110, Brazil
| | - Renata Nunes Jardim
- Analytical Laboratory of Restorative Biomaterials-LABiom-R, Faculdade de Odontologia, Universidade Federal Fluminense, Niterói 24040-110, Brazil
| | - Marianna Pires Barbosa
- Analytical Laboratory of Restorative Biomaterials-LABiom-R, Faculdade de Odontologia, Universidade Federal Fluminense, Niterói 24040-110, Brazil
| | - Tiago Braga Rabello
- Faculdade de Odontologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| |
Collapse
|
3
|
de Souza CS, Silva TDC, Tsutsumi MSC, Lima GQ, Queiroz ME, Strazzi-Sahyon HB, Maluly-Proni AT, Briso ALF, dos Santos PH. Do different adhesives influence the color stability and fluorescence of composite restorations after aging? Braz Dent J 2023; 34:67-74. [PMID: 38133093 PMCID: PMC10742359 DOI: 10.1590/0103-6440202305504] [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: 04/17/2023] [Accepted: 11/13/2023] [Indexed: 12/23/2023] Open
Abstract
This study aimed to evaluate the influence of dental adhesive color on the chromatic stability and fluorescence intensity of composite resin restorations of different thicknesses. Ninety bovine enamel samples were obtained and restored with resin composite varying thicknesses of restorative material and enamel (1.0 mm enamel and 1.0 mm composite; 1.5 mm enamel and 0.5 mm composite; 0.5 mm enamel and 1.5 mm composite). The restorations were made of composite resin (Opallis E-bleach H) using different types of dental adhesives: Ambar, Ambar APS, and Single Bond Universal (n=10). The samples were subjected to color measurement tests in a spectrophotometer using CIEDE2000 and fluorescence intensity measurements before and after aging in a red wine coloring solution. Data were subjected to analysis of variance (ANOVA) and Tukey's test (α = 0.05). There were no statistically significant changes in color stability or fluorescence intensity for restorations made of different materials or thicknesses (p>0.05). Single Bond Universal showed greater color stability at 0.5 mm thickness (ΔE00 = 4.4 ± 1.6) compared to other thicknesses of the same material (p=0.003), as well as a greater difference in fluorescence intensity after aging at 1.5 mm thickness (-414.9 ± 103.8) compared to other materials (p=0.0002). Overall, it was concluded that the different adhesive systems did not influence the color stability and fluorescence of restorations of different thicknesses.
Collapse
Affiliation(s)
- Claudia Simoes de Souza
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry - Sao Paulo State University, Araçatuba, SP, Brazil
| | - Thamirys da Costa Silva
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry - Sao Paulo State University, Araçatuba, SP, Brazil
| | - Mariana Sati Cantalejo Tsutsumi
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry - Sao Paulo State University, Araçatuba, SP, Brazil
| | - Glivia Queiroz Lima
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry - Sao Paulo State University, Araçatuba, SP, Brazil
| | - Mariana Elias Queiroz
- Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry - Sao Paulo State University, Araçatuba, SP, Brazil
| | | | - Ana Teresa Maluly-Proni
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry - Sao Paulo State University, Araçatuba, SP, Brazil
| | - Andre Luiz Fraga Briso
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry - Sao Paulo State University, Araçatuba, SP, Brazil
| | - Paulo Henrique dos Santos
- Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry - Sao Paulo State University, Araçatuba, SP, Brazil
- Dental Research Institute - Restorative Dentistry. Faculty of Dentistry - University of Toronto, Toronto, ON, Canada
| |
Collapse
|
4
|
Agostinelli BG, Andia DC, Lima AF. Co-initiators of polymerization can modulate the inflammatory cytokine release without major cytotoxic effects in human dental pulp cells. J Biomed Mater Res B Appl Biomater 2023; 111:1112-1120. [PMID: 36598816 DOI: 10.1002/jbm.b.35218] [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: 05/24/2022] [Revised: 11/16/2022] [Accepted: 12/23/2022] [Indexed: 01/05/2023]
Abstract
To evaluate the cytotoxicity of co-initiators of polymerization and its influence on cytokine release from human dental pulp cells (hDPCs). Cells were isolated from the dental pulp of sound human third molars. The co-initiators dimethylaminoethyl amine benzoate-(EDAB), 2-(dimethylamino)ethyl methacrylate (DMAEMA); 2-Ethylhexyl 4-(dimethylamino)benzoate (EHA) and bis(4-methyl phenyl)iodonium hexafluorophosphate (BPI) were diluted in dimethylsulfoxide (DMSO) at different concentrations. In this way, experimental groups and one control (without treatment) were obtained. hDPCs (10 × 104 cell per well) were seeded on 96 well plates and incubated at 37°C and 5% CO2 for 48 h. After this, the cells were exposed to different concentrations of co-initiators cited for 24 h. After this time, the culture medium was removed, and the mitochondrial metabolism was evaluated by MTT assay, cell death by flow cytometry, and cytokine released (IL-1β, IL6, IL-8, IL-10, and TNF-α) was analyzed by MAGPIX assay. The data were analyzed by ANOVA one-way and Tukey's test. EHA, DMAEMA, and EDAB did not reduce the mitochondrial metabolism. BPI presented high toxicity with remarkable reduction (80%) after exposure to 1 mM. The cell death of all test groups was similar to control. After 24 h treatment, the IL-8 was up-regulated by all compounds, while IL-6 was upregulated after exposure to EHA and downregulated after DMAEMA stimulation. BPI, EHA, EDAB, and DMAEMA can trigger an initial inflammatory response, upregulating the IL-8 secretion in hDPCs in a compound-concentration-dependent manner; however, this was not accompanied by major cytotoxic effects at cell death or mitochondrial-metabolism levels.
Collapse
Affiliation(s)
| | | | - Adriano F Lima
- Dental Research Division, Paulista University, Sao Paulo, Brazil
| |
Collapse
|
5
|
Evaluation of the Selected Mechanical and Aesthetic Properties of Experimental Resin Dental Composites Containing 1-phenyl-1,2 Propanedione or Phenylbis(2,4,6-trimethylbenzoyl)-phosphine Oxide as a Photoinitiator. Int J Mol Sci 2023; 24:ijms24065573. [PMID: 36982646 PMCID: PMC10053791 DOI: 10.3390/ijms24065573] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/01/2023] [Accepted: 03/05/2023] [Indexed: 03/17/2023] Open
Abstract
The goal of this study was to compare the mechanical properties of experimental resin dental composites containing a conventional photoinitiating system (camphorquinone CQ and 2-(dimethylami-no)ethyl methacrylate (DMAEMA)) to a photoinitiator system containing 1-phenyl-1,2 propanedione (PPD) with 2-(dimethylami-no)ethyl methacrylate) or acting alone phenylbis(2,4,6-trimethylbenzoyl)-phosphine oxide (BAPO). The manually produced composites consisted of an organic matrix: bis-GMA (60 wt. %), TEGDMA (40 wt. %), and silanized silica filler (45 wt. %). The composites contained 0.4/0.8 wt. %, 0.8/1.6 wt. %, and 1/2 wt. % of PPD/DMAEMA and another group included 0.25, 0.5, or 1 wt. % of BAPO. Vickers hardness, microhardness (in the nanoindentation test), diametral tensile strength, and flexural strength were assessed, and CIE L* a* b* colorimetric analysis was conducted for each composite produced. The highest average Vickers hardness values were obtained for the composite containing 1 wt. % BAPO (43.73 ± 3.52 HV). There was no statistical difference in the results of diametral tensile strength for the experimental composites tested. The results of 3-point bending tests were the highest for composites containing CQ (77.3 ± 8.84 MPa). Despite the higher hardness of experimental composites including PPD or BAPO, compared with composites with CQ, the overall results indicate that the composite with CQ still represents a better solution when used as a photoinitiator system. Moreover, the composites containing PPD and DMAEMA are not promising in terms of color or mechanical properties, especially as they require significantly longer irradiation times.
Collapse
|
6
|
Li M, Hu P, Zhu J, Liu R, Li Z. Unimolecular Benzodioxole-based Photoinitiators for Free Radical and Cationic Photopolymerization Under LED Light Irradiation. J PHOTOPOLYM SCI TEC 2022. [DOI: 10.2494/photopolymer.35.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Mengqi Li
- School of Chemical and Material Engineering, Jiangnan University
| | - Peng Hu
- School of Chemical and Material Engineering, Jiangnan University
| | - Junzhe Zhu
- School of Chemical and Material Engineering, Jiangnan University
| | - Ren Liu
- School of Chemical and Material Engineering, Jiangnan University
| | - Zhiquan Li
- School of Materials and Energy, Guangdong University of Technology
| |
Collapse
|
7
|
Can TPO as Photoinitiator Replace "Golden Mean" Camphorquinone and Tertiary Amines in Dental Composites? Testing Experimental Composites Containing Different Concentration of Diphenyl(2,4,6-trimethylbenzoyl)phosphine Oxide. Int J Mol Sci 2022; 23:ijms231911594. [PMID: 36232894 PMCID: PMC9569800 DOI: 10.3390/ijms231911594] [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: 08/29/2022] [Revised: 09/21/2022] [Accepted: 09/26/2022] [Indexed: 11/25/2022] Open
Abstract
The aim of this research was to compare the biomechanical properties of experimental composites containing a classic photoinitiating system (camphorquinone and 2-(dimethylami-no)ethyl methacrylate) or diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO) as a photoinitiator. The produced light-cured composites consisted of an organic matrix-Bis-GMA (60 wt.%), TEGDMA (40 wt.%) and silanized silica filler (45 wt.%). Composites contained 0.27; 0.5; 0.75 or 1 wt.% TPO. Vickers hardness, microhardness (in the nanoindentation test), diametral tensile strength, resistance to three-point bending and the CIE L* a* b* colorimetric analysis was performed with each composite produced. The highest average Vickers hardness values were obtained for the composite containing 1 wt.% TPO (43.18 ± 1.7HV). The diametral tensile strength remains on regardless of the type and amount of photoinitiator statistically the same level, except for the composite containing 0.5 wt.% TPO for which DTS = 22.70 ± 4.7 MPa and is the lowest recorded value. The highest average diametral tensile strength was obtained for the composite containing 0.75 wt.% TPO (29.73 ± 4.8 MPa). The highest modulus of elasticity characterized the composite containing 0.75 wt.% TPO (5383.33 ± 1067.1 MPa). Composite containing 0.75 wt.% TPO has optimal results in terms of Vickers hardness, diametral tensile strength, flexural strength and modulus of elasticity. Moreover, these results are better than the parameters characterizing the composite containing the CQ/DMAEMA system. In terms of an aesthetic composite containing 0.75 wt.%. TPO is less yellow in color than the composite containing CQ/DMAEMA. This conclusion was objectively confirmed by test CIE L* a* b*.
Collapse
|
8
|
Kim GT, Go HB, Yu JH, Yang SY, Kim KM, Choi SH, Kwon JS. Cytotoxicity, Colour Stability and Dimensional Accuracy of 3D Printing Resin with Three Different Photoinitiators. Polymers (Basel) 2022; 14:polym14050979. [PMID: 35267799 PMCID: PMC8912826 DOI: 10.3390/polym14050979] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 02/23/2022] [Accepted: 02/25/2022] [Indexed: 01/30/2023] Open
Abstract
Biocompatibility is important for the 3D printing of resins used in medical devices and can be affected by photoinitiators, one of the key additives used in the 3D printing process. The choice of ingredients must be considered, as the toxicity varies depending on the photoinitiator, and unreacted photoinitiator may leach out of the polymerized resin. In this study, the use of ethyl (2,4,6-trimethylbenzoyl) phenylphosphinate (TPO-L) as a photoinitiator for the 3D printing of resin was considered for application in medical device production, where the cytotoxicity, colour stability, dimensional accuracy, degree of conversion, and mechanical/physical properties were evaluated. Along with TPO-L, two conventional photoinitiators, phenylbis (2,4,6-trimethylbenzoyl) phosphine oxide (BAPO) and diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide (TPO), were considered. A total of 0.1 mol% of each photoinitiator was mixed with the resin matrix to prepare a resin mixture for 3D printing. The specimens were printed using a direct light processing (DLP) type 3D printer. The 3D-printed specimens were postprocessed and evaluated for cytotoxicity, colour stability, dimensional accuracy, degree of conversion, and mechanical properties in accordance with international standards and the methods described in previous studies. The TPO-L photoinitiator showed excellent biocompatibility and colour stability and possessed with an acceptable dimensional accuracy for use in the 3D printing of resins. Therefore, the TPO-L photoinitiator can be sufficiently used as a photoinitiator for dental 3D-printed resin.
Collapse
Affiliation(s)
- Gi-Tae Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Korea; (G.-T.K.); (H.-B.G.); (S.-Y.Y.); (K.-M.K.)
- BK21 FOUR Program, Yonsei University College of Dentistry, Seoul 03722, Korea;
| | - Hye-Bin Go
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Korea; (G.-T.K.); (H.-B.G.); (S.-Y.Y.); (K.-M.K.)
| | - Jae-Hun Yu
- BK21 FOUR Program, Yonsei University College of Dentistry, Seoul 03722, Korea;
- Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul 03722, Korea
| | - Song-Yi Yang
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Korea; (G.-T.K.); (H.-B.G.); (S.-Y.Y.); (K.-M.K.)
| | - Kwang-Mahn Kim
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Korea; (G.-T.K.); (H.-B.G.); (S.-Y.Y.); (K.-M.K.)
| | - Sung-Hwan Choi
- BK21 FOUR Program, Yonsei University College of Dentistry, Seoul 03722, Korea;
- Department of Orthodontics, Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul 03722, Korea
- Correspondence: (S.-H.C.); (J.-S.K.); Tel.: +82-2-2228-3102 (S.-H.C.); +82-2-2228-8301 (J.-S.K.)
| | - Jae-Sung Kwon
- Department and Research Institute of Dental Biomaterials and Bioengineering, Yonsei University College of Dentistry, Seoul 03722, Korea; (G.-T.K.); (H.-B.G.); (S.-Y.Y.); (K.-M.K.)
- BK21 FOUR Program, Yonsei University College of Dentistry, Seoul 03722, Korea;
- Correspondence: (S.-H.C.); (J.-S.K.); Tel.: +82-2-2228-3102 (S.-H.C.); +82-2-2228-8301 (J.-S.K.)
| |
Collapse
|
9
|
Pérez-Mondragón AA, Cuevas-Suárez CE, García-Serrano J, Trejo-Carbajal N, Lobo-Guerrero A, Herrera-González AM. Adhesive Resins with High Shelf-Life Stability Based on Tetra Unsaturated Monomers with Tertiary Amines Moieties. Polymers (Basel) 2021; 13:polym13121944. [PMID: 34208102 PMCID: PMC8230799 DOI: 10.3390/polym13121944] [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: 05/26/2021] [Revised: 06/04/2021] [Accepted: 06/09/2021] [Indexed: 11/16/2022] Open
Abstract
This work reports the use of two monomers with two tertiary amines and four methacrylic (TTME) or acrylic (TTAC) terminal groups as co-initiators in the formulation of experimental resin adhesive systems. Both monomers were characterized by FT-IR and 1H NMR spectroscopies. The control adhesive was formulated with BisGMA, TEGDMA, HEMA, and the binary system CQ-EDAB as a photo-initiator system. For the experimental adhesives, the EDAB was completely replaced for the TTME or the TTAC monomers. The adhesives formulated with TTME or TTAC monomers achieved double bond conversion values close to 75%. Regarding the polymerization rate, materials formulated with TTME or TTAC achieved lower values than the material formulated with EDAB, giving them high shelf-life stability. The degree of conversion after shelf simulation was only reduced for the EDAB material. Ultimate tensile strength, translucency parameter, and micro-tensile bond strength to dentin were similar for control and experimental adhesive resins. Due to their characteristics, TTME and TTAC monomers are potentially useful in the formulation of photopolymerizable resins for dental use with high shelf-life stability.
Collapse
Affiliation(s)
- Alma Antonia Pérez-Mondragón
- Doctorado en Ciencias de los Materiales, Universidad Autónoma del Estado de Hidalgo, Pachuca-Tulancingo Km. 4.5, Carboneras, Mineral de la Reforma 42184, Hgo., Mexico;
- Laboratorio de Polímeros, Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Pachuca-Tulancingo Km. 4.5, Carboneras, Mineral de la Reforma 42184, Hgo., Mexico; (J.G.-S.); (N.T.-C.); (A.L.-G.)
| | - Carlos Enrique Cuevas-Suárez
- Laboratorio de Biomateriales Dentales, Área Académica de Odontología, Instituto de Ciencias de la Salud, Universidad Autónoma del Estado de Hidalgo, Circuito Ex Hacienda La Concepción S/N, San Agustín Tlaxiaca 42160, Hgo., Mexico
- Correspondence: (C.E.C.-S.); (A.M.H.-G.); Tel.: +52-771-717-2000 (C.E.C.-S.); +52-771-717-2000 (ext. 2281) (A.M.H.-G.)
| | - Jesús García-Serrano
- Laboratorio de Polímeros, Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Pachuca-Tulancingo Km. 4.5, Carboneras, Mineral de la Reforma 42184, Hgo., Mexico; (J.G.-S.); (N.T.-C.); (A.L.-G.)
| | - Nayely Trejo-Carbajal
- Laboratorio de Polímeros, Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Pachuca-Tulancingo Km. 4.5, Carboneras, Mineral de la Reforma 42184, Hgo., Mexico; (J.G.-S.); (N.T.-C.); (A.L.-G.)
| | - A. Lobo-Guerrero
- Laboratorio de Polímeros, Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Pachuca-Tulancingo Km. 4.5, Carboneras, Mineral de la Reforma 42184, Hgo., Mexico; (J.G.-S.); (N.T.-C.); (A.L.-G.)
| | - Ana M. Herrera-González
- Laboratorio de Polímeros, Instituto de Ciencias Básicas e Ingeniería, Universidad Autónoma del Estado de Hidalgo, Pachuca-Tulancingo Km. 4.5, Carboneras, Mineral de la Reforma 42184, Hgo., Mexico; (J.G.-S.); (N.T.-C.); (A.L.-G.)
- Correspondence: (C.E.C.-S.); (A.M.H.-G.); Tel.: +52-771-717-2000 (C.E.C.-S.); +52-771-717-2000 (ext. 2281) (A.M.H.-G.)
| |
Collapse
|
10
|
ConceiÇÃo LD, Cuevas-SuÁrez CE, Piva E, Lund RG, Leite FRM. Biological and mechanical characterization of commercial and experimental periodontal surgical dressings. Braz Oral Res 2021; 35:e045. [PMID: 33681878 DOI: 10.1590/1807-3107bor-2021.vol35.0045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/28/2020] [Indexed: 11/22/2022] Open
Abstract
The objective of this study was to evaluate the biocompatibility and mechanical properties of two commercially available and one experimental periodontal dressing materials. The cytotoxicity of Periobond ® , Barricaid ® and one experimental periodontal dressing based on Exothane ® 8 monomer was tested on 3T3/NIH mouse fibroblast. Genotoxicity was assessed by micronuclei formation, and cell alterations were analyzed using light microscopy. Both biological assays were performed using the eluate obtained from specimens after 24, 72, or 168 hours of incubation. Mechanical characterization was assessed through the ultimate tensile strength and the water sorption and solubility tests. The significance level of α = 0.05 was used for all statistical analyses. All the materials promoted a cell viability lower than 60% in all evaluated times. In general, the cell viability was significantly reduced after 72 and 168h of specimens' incubation. Considering the factor material, there were not statistical differences in the cell viability (p = 0.156). The genotoxicity was not statistically significant among the groups in the different periods of time (p > 0.05). Differences in the ultimate tensile strength values were not statistically significant different among the groups (p = 0.125). Periobond ® showed the higher water sorption values (p < 0.001). Regarding solubility, there were no statistical differences between the groups (p = 0.098). All the periodontal dressing materials evaluated in this study exerted a cytotoxic effect against mouse fibroblasts, and their toxicity became more evident over time. Among the materials evaluated, the experimental light-cure type has shown overall similar properties to the commercial references.
Collapse
Affiliation(s)
- Luciana Domingues ConceiÇÃo
- Universidade Federal de Pelotas , Dental School , Department of Restorative Dentistry , Pelotas , RS , Brazil
| | - Carlos Enrique Cuevas-SuÁrez
- Autonomous University of Hidalgo State , Academic Area of Dentistry , Dental Materials Laboratory , San Agustín , Tlaxiaca , Mexico
| | - Evandro Piva
- Universidade Federal de Pelotas , Dental School , Department of Restorative Dentistry , Pelotas , RS , Brazil
| | - Rafael Guerra Lund
- Universidade Federal de Pelotas , Dental School , Department of Restorative Dentistry , Pelotas , RS , Brazil
| | | |
Collapse
|
11
|
Wang Y, Zhu M, Zhu XX. Functional fillers for dental resin composites. Acta Biomater 2021; 122:50-65. [PMID: 33290913 DOI: 10.1016/j.actbio.2020.12.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 12/14/2022]
Abstract
Dental resin composites (DRCs) are popular materials to repair caries. Although various types of DRCs with different characteristics have been developed, restoration failures still exist. Bulk fracture and secondary caries have been considered as main causes for the failure of composites restoration. To address these problems, various fillers with specific functions have been introduced and studied. Some fillers with specific morphologies such as whisker, fiber, and nanotube, have been used to increase the mechanical properties of DRCs, and other fillers releasing ions such as Ag+, Ca2+, and F-, have been used to inhibit the secondary caries. These functional fillers are helpful to improve the performances and lifespan of DRCs. In this article, we firstly introduce the composition and development of DRCs, then review and discuss the functional fillers classified according to their roles in the DRCs, finally give a summary on the current research and predict the trend of future development.
Collapse
Affiliation(s)
- Yazi Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China; Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec, H3C 3J7, Canada
| | - Meifang Zhu
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
| | - X X Zhu
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec, H3C 3J7, Canada.
| |
Collapse
|
12
|
The Photoinitiators Used in Resin Based Dental Composite-A Review and Future Perspectives. Polymers (Basel) 2021; 13:polym13030470. [PMID: 33540697 PMCID: PMC7867280 DOI: 10.3390/polym13030470] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 01/27/2021] [Accepted: 01/29/2021] [Indexed: 11/26/2022] Open
Abstract
The presented paper concerns current knowledge of commercial and alternative photoinitiator systems used in dentistry. It discusses alternative and commercial photoinitiators and focuses on mechanisms of polymerization process, in vitro measurement methods and factors influencing the degree of conversion and hardness of dental resins. PubMed, Academia.edu, Google Scholar, Elsevier, ResearchGate and Mendeley, analysis from 1985 to 2020 were searched electronically with appropriate keywords. Over 60 articles were chosen based on relevance to this review. Dental light-cured composites are the most common filling used in dentistry, but every photoinitiator system requires proper light-curing system with suitable spectrum of light. Alternation of photoinitiator might cause changing the values of biomechanical properties such as: degree of conversion, hardness, biocompatibility. This review contains comparison of biomechanical properties of dental composites including different photosensitizers among other: camphorquinone, phenanthrenequinone, benzophenone and 1-phenyl-1,2 propanedione, trimethylbenzoyl-diphenylphosphine oxide, benzoyl peroxide. The major aim of this article was to point out alternative photoinitiators which would compensate the disadvantages of camphorquinone such as: yellow staining or poor biocompatibility and also would have mechanical properties as satisfactory as camphorquinone. Research showed there is not an adequate photoinitiator which can be as sufficient as camphorquinone (CQ), but alternative photosensitizers like: benzoyl germanium or novel acylphosphine oxide photoinitiators used synergistically with CQ are able to improve aesthetic properties and degree of conversion of dental resin.
Collapse
|
13
|
Tomal W, Ortyl J. Water-Soluble Photoinitiators in Biomedical Applications. Polymers (Basel) 2020; 12:E1073. [PMID: 32392892 PMCID: PMC7285382 DOI: 10.3390/polym12051073] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 05/02/2020] [Accepted: 05/03/2020] [Indexed: 12/25/2022] Open
Abstract
Light-initiated polymerization processes are currently an important tool in various industrial fields. The advancement of technology has resulted in the use of photopolymerization in various biomedical applications, such as the production of 3D hydrogel structures, the encapsulation of cells, and in drug delivery systems. The use of photopolymerization processes requires an appropriate initiating system that, in biomedical applications, must meet additional criteria such as high water solubility, non-toxicity to cells, and compatibility with visible low-power light sources. This article is a literature review on those compounds that act as photoinitiators of photopolymerization processes in biomedical applications. The division of initiators according to the method of photoinitiation was described and the related mechanisms were discussed. Examples from each group of photoinitiators are presented, and their benefits, limitations, and applications are outlined.
Collapse
Affiliation(s)
- Wiktoria Tomal
- Faculty of Chemical Engineering and Technology, Krakow University of Technology, Warszawska 24, 31-155 Krakow, Poland;
| | - Joanna Ortyl
- Faculty of Chemical Engineering and Technology, Krakow University of Technology, Warszawska 24, 31-155 Krakow, Poland;
- Photo HiTech Ltd., Bobrzyńskiego 14, 30-348 Krakow, Poland
| |
Collapse
|
14
|
Kalagi S, Feitosa SA, Münchow EA, Martins VM, Karczewski AE, Cook NB, Diefenderfer K, Eckert GJ, Geraldeli S, Bottino MC. Chlorhexidine-modified nanotubes and their effects on the polymerization and bonding performance of a dental adhesive. Dent Mater 2020; 36:687-697. [PMID: 32241557 PMCID: PMC7224330 DOI: 10.1016/j.dental.2020.03.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/12/2020] [Accepted: 03/12/2020] [Indexed: 11/21/2022]
Abstract
OBJECTIVES The purpose of this study was to synthesize chlorhexidine (CHX)-encapsulated aluminosilicate clay nanotubes (Halloysite®, HNTs) and to incorporate them into the primer/adhesive components of an etch-and-rinse adhesive system (SBMP; Scotchbond Multipurpose, 3M ESPE) and to test their effects on degree of conversion, viscosity, immediate and long-term bonding to dentin. METHODS CHX-modified HNTs were synthesized using 10% or 20% CHX solutions. The primer and the adhesive components of SBMP were incorporated with 15wt.% of the CHX-encapsulated HNTs. Degree of conversion (DC) and viscosity analyses were performed to characterize the modified primers/adhesives. For bond strength testing, acid-etched dentin was treated with one of the following: SBMP (control); 0.2%CHX solution before SBMP; CHX-modified primers+SBMP adhesive; SBMP primer+CHX-modified adhesives; and SBMP primer+CHX-free HNT-modified adhesive. The microtensile bond strength test was performed after immediate (24h) and long-term (6 months) of water storage. Data were analyzed using ANOVA and Tukey (α=5%) and the Weibull analysis. RESULTS DC was greater for the CHX-free HNT-modified adhesive, whereas the other experimental adhesives showed similar DC as compared with the control. Primers were less viscous than the adhesives, without significant differences within the respective materials. At 24h, all groups showed similar bonding performance and structural reliability; whereas at the 6-month period, groups treated with the 0.2%CHX solution prior bonding or with the CHX-modified primers resulted in greater bond strength than the control and superior reliability. SIGNIFICANCE The modification of a primer or adhesive with CHX-encapsulated HNTs was an advantageous approach that did not impair the polymerization, viscosity and bonding performance of the materials, showing a promising long-term effect on resin-dentin bonds.
Collapse
Affiliation(s)
- Sara Kalagi
- Department of Cariology, Operative Dentistry & Dental Public Health, Indiana University School of Dentistry (IUSD), Indianapolis, IN, USA; Department of Restorative Dental Sciences, College of Dentistry, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Sabrina A Feitosa
- Department of Biomedical and Applied Sciences, Division of Dental Biomaterials, IUSD, Indianapolis, IN, USA
| | - Eliseu A Münchow
- Department of Conservative Dentistry, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS 90035-003, Brazil
| | - Victor M Martins
- Department of Biomedical and Applied Sciences, Division of Dental Biomaterials, IUSD, Indianapolis, IN, USA
| | - Ashley E Karczewski
- Department of Biomedical and Applied Sciences, Division of Dental Biomaterials, IUSD, Indianapolis, IN, USA
| | - N Blaine Cook
- Department of Cariology, Operative Dentistry & Dental Public Health, Indiana University School of Dentistry (IUSD), Indianapolis, IN, USA
| | - Kim Diefenderfer
- Department of Cariology, Operative Dentistry & Dental Public Health, Indiana University School of Dentistry (IUSD), Indianapolis, IN, USA
| | - George J Eckert
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Saulo Geraldeli
- Department of General Dentistry, School of Dental Medicine, East Carolina University, Greenville, NC, USA
| | - Marco C Bottino
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, MI, USA.
| |
Collapse
|