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Ma RX, Li RF, Deng XQ, Qiao RQ, Li JK, Song KX, Ji SL, Hu YC. Repair of tendons treated with peracetic acid-ethanol and gamma irradiation by EDC combined with NHS: a morphological, biochemical and biomechanical study in vitro. Cell Tissue Bank 2024; 25:427-442. [PMID: 36797536 DOI: 10.1007/s10561-023-10080-6] [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: 11/23/2022] [Accepted: 02/04/2023] [Indexed: 02/18/2023]
Abstract
The purpose of this study was to investigate whether 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) combined with n-hydroxysuccinimide (NHS) can repair tendon damage caused by peracetic acid-ethanol and gamma irradiation sterilization. The semitendinosus tendons of 15 New Zealand white rabbits were selected as experimental materials, and the tendons were sterilized in a solution containing 1% (v/w) peracetic acid and 24% (v/w) ethanol. After 15 kGy gamma irradiation sterilization, the tendons were randomly divided into three groups (n = 10). The tendons were repaired with EDCs of 0, 2.5 and 5 mM combined with 5 mM NHS for 6 h, the tendons were temporarily stored at - 80 ± °C. The arrangement and spatial structure of collagen fibers were observed by light microscopy and scanning electron microscopy, the collagen type and collagen crimp period were observed under a polarizing microscope, and the collagen fibril diameter and its distribution were measured by transmission electron microscopy, from which the collagen fibril index and mass average diameter were calculated. The resistance of collagen to enzymolysis was detected by the free hydroxyproline test, and tensile fracture and cyclic loading tests of each group of tendons were carried out, from which the elastic modulus, maximum stress, maximum strain, strain energy density and cyclic creep strain were calculated. The obtained results showed that the gap between loose collagen fibers in the 0 mM control group was wider, the parallel arrangement of tendons in the 2.5 and 5 mM groups was more uniform and regular and the fiber space decreased, the crimp period in the 5 mM group was lower than that in the 0 mM group (P < 0.05), and the concentration of hydroxyproline in the 5 mM group (711.64 ± 77.95 μg/g) was better than that in the control group (1150.57 ± 158.75 μg/g). The elastic modulus of the 5 mM group (424.73 ± 150.96 MPa) was better than that of the 0 mM group (179.09 ± 37.14 MPa). Our results show that EDC combined with NHS can repair damaged tendons after peracetic acid-ethanol and gamma radiation treatment, and 5 mM EDC has better morphological performance, anti-enzymolysis ability and biomechanical properties than 2.5 mM EDC.
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Affiliation(s)
- Rong-Xing Ma
- Department of Bone and Soft Tissue Oncology, Tianjin Hospital, 406 Jiefang Southern Road, Tianjin, 300211, China
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Rui-Feng Li
- Graduate School, Tianjin Medical University, Tianjin, China
| | | | - Rui-Qi Qiao
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Ji-Kai Li
- Graduate School, Tianjin Medical University, Tianjin, China
| | - Kun-Xiu Song
- Department of Hand and Microsurgery, Binzhou Medical University Hospital, Binzhou, Shandong Province, China
| | - Shao-Lin Ji
- Shandong Provincial Third Hospital, Shandong University, Jinan, Shandong Province, China
| | - Yong-Cheng Hu
- Department of Bone and Soft Tissue Oncology, Tianjin Hospital, 406 Jiefang Southern Road, Tianjin, 300211, China.
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Zeng Q, Xu B, Qian C, Li N, Guo Z, Wu S. Surface chemical modification of poly(dimethylsiloxane) for stabilizing antibody immobilization and T cell cultures. Biomater Sci 2024; 12:2369-2380. [PMID: 38498344 DOI: 10.1039/d3bm01729j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Advances in cell immunotherapy underscore the need for effective methods to produce large populations of effector T cells, driving growing interest in T-cell bioprocessing and immunoengineering. Research suggests that T cells demonstrate enhanced expansion and differentiation on soft matrices in contrast to rigid ones. Nevertheless, the influence of antibody conjugation chemistry on these processes remains largely unexplored. In this study, we examined the effect of antibody conjugation chemistry on T cell activation, expansion and differentiation using a soft and biocompatible polydimethylsiloxane (PDMS) platform. We rigorously evaluated three distinct immobilization methods, beginning with the use of amino-silane (PDMS-NH2-Ab), followed by glutaraldehyde (PDMS-CHO-Ab) or succinic acid anhydride (PDMS-COOH-Ab) activation, in addition to the conventional physical adsorption (PDMS-Ab). By employing both stable amide bonds and reducible Schiff bases, antibody conjugation significantly enhanced antibody loading and density compared to physical adsorption. Furthermore, we discovered that the PDMS-COOH-Ab surface significantly promoted IL-2 secretion, CD69 expression, and T cell expansion compared to the other groups. Moreover, we observed that both PDMS-COOH-Ab and PDMS-NH2-Ab surfaces exhibited a tendency to induce the differentiation of naïve CD4+ T cells into Th1 cells, whereas the PDMS-Ab surface elicited a Th2-biased immunological response. These findings highlight the importance of antibody conjugation chemistry in the design and development of T cell culture biomaterials. They also indicate that PDMS holds promise as a material for constructing culture platforms to modulate T cell activation, proliferation, and differentiation.
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MESH Headings
- Dimethylpolysiloxanes/chemistry
- T-Lymphocytes/immunology
- Surface Properties
- Antibodies, Immobilized/chemistry
- Antibodies, Immobilized/immunology
- Cell Differentiation/drug effects
- Animals
- Lymphocyte Activation/drug effects
- Cell Proliferation/drug effects
- Interleukin-2/metabolism
- Interleukin-2/chemistry
- Mice
- Cells, Cultured
- Antigens, CD/immunology
- Antigens, CD/metabolism
- Antigens, Differentiation, T-Lymphocyte/immunology
- Antigens, Differentiation, T-Lymphocyte/metabolism
- Antigens, Differentiation, T-Lymphocyte/chemistry
- Adsorption
- Succinic Anhydrides
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Affiliation(s)
- Qiongjiao Zeng
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
| | - Bowen Xu
- National Key Laboratory of Immunity & Inflammation, Institute of Immunology, Naval Medical University, Shanghai, 200433, China.
| | - Cheng Qian
- National Key Laboratory of Immunity & Inflammation, Institute of Immunology, Naval Medical University, Shanghai, 200433, China.
| | - Nan Li
- National Key Laboratory of Immunity & Inflammation, Institute of Immunology, Naval Medical University, Shanghai, 200433, China.
| | - Zhenhong Guo
- National Key Laboratory of Immunity & Inflammation, Institute of Immunology, Naval Medical University, Shanghai, 200433, China.
| | - Shuqing Wu
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
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Wolowski MTC, Grenier AMS, de Oliveira VA, Anselmi C, Gibin MS, de Castro-Hoshino LV, Sato F, Perez C, Scheffel RH, Hebling J, Baesso ML, Scheffel DLS. Performance of self-etching adhesives on caries-affected primary dentin treated with glutaraldehyde or silver diamine fluoride. J Mech Behav Biomed Mater 2024; 150:106293. [PMID: 38141362 DOI: 10.1016/j.jmbbm.2023.106293] [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: 06/07/2023] [Revised: 08/03/2023] [Accepted: 12/02/2023] [Indexed: 12/25/2023]
Abstract
OBJECTIVES to evaluate the quality and stability of adhesive interfaces established by self-etching adhesives on caries-affected primary dentin (CAD) treated with glutaraldehyde (GA) or silver diamine fluoride (SDF). METHODS 42 primary molars were exposed to a microbiological caries-inducing protocol and divided into 6 groups according to the adhesive system (Clearfil SE - CL or FL Bond II - FL) and pretreatment (water, GA or SDF) applied on CAD. One tooth from each group was analyzed for surface modification using infrared spectroscopy. Crowns were restored with resin composite (n = 36) and cut into beams and slices. The beams were subjected to microtensile testing, Raman spectroscopy and SEM after 24 h and 6 months of storage. The slices were analyzed using Micro-Raman spectroscopy to determine the diffusion zone thickness (DZ) in each period. Data were analyzed by ANOVA and Tukey or Kruskal-Wallis and Dunn tests (α = 0.05%). RESULTS SDF reduced the immediate bond strength for both adhesives. The control groups showed a decrease in BS after 6 months in artificial saliva. GA increased immediate DZ for FL, while SDF had the opposite effect on CL. GA decreased the DZ for FL at 6 months. There was a predominance of adhesive failures with areas of cohesive dentin fractures within control groups. SIGNIFICANCE Modifications caused by dentin surface treatments may directly affect the performance of adhesive systems and the quality and stability of adhesive restorations.
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Affiliation(s)
| | | | - Victória Alícia de Oliveira
- Department of Dentistry, State University of Maringa - UEM, Avenida Mandacaru, 1550, Maringá, Paraná, Brazil
| | - Caroline Anselmi
- Department of Morphology, Orthodontics and Pediatric Dentistry, São Paulo State University (UNESP), School of Dentistry, Rua Humaita, 1680, Araraquara, São Paulo, Brazil
| | - Mariana Sversut Gibin
- Department of Physics, State University of Maringa - UEM, Avenida Colombo, 5790, Maringá, Paraná, Brazil
| | | | - Francielle Sato
- Department of Physics, State University of Maringa - UEM, Avenida Colombo, 5790, Maringá, Paraná, Brazil
| | - Cristina Perez
- Department of Oral Health Science, Division of Pediatric Dentistry, University of Kentucky - UK, 800 Rose Street, Lexington, KY, USA
| | - Régis Henke Scheffel
- Department of Dentistry, State University of Maringa - UEM, Avenida Mandacaru, 1550, Maringá, Paraná, Brazil
| | - Josimeri Hebling
- Department of Morphology, Orthodontics and Pediatric Dentistry, São Paulo State University (UNESP), School of Dentistry, Rua Humaita, 1680, Araraquara, São Paulo, Brazil
| | - Mauro Luciano Baesso
- Department of Physics, State University of Maringa - UEM, Avenida Colombo, 5790, Maringá, Paraná, Brazil
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Fernandes LDO, Mendes Soares IP, Anselmi C, Pires MLBA, Ribeiro RADO, Peruchi V, de Souza Costa CA, Hebling J. Pulp cell response to the application of silver diamine fluoride and potassium iodide on caries-like demineralized dentin. Clin Oral Investig 2023; 27:7295-7306. [PMID: 37853265 DOI: 10.1007/s00784-023-05320-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/10/2023] [Indexed: 10/20/2023]
Abstract
OBJECTIVES To investigate the response of pulp cells to the application of silver diamine fluoride (SDF) and potassium iodide (KI) on demineralized dentin. MATERIALS AND METHODS The occlusal surfaces of human dentin discs (0.4 mm thick) with similar permeability were subjected to an artificial caries protocol, and then the discs were adapted into artificial pulp chambers. MDPC-23 cells were seeded on the healthy pulp dentin surface, while the demineralized surface was treated with SDF, KI, SDF + KI, or hydrogen peroxide (positive control-PC) (n = 8). The negative control (NC) received ultrapure water. After 24 h, cell viability (alamarBlue) and morphology (SEM) were evaluated. The extracts were then applied to new MDPC-23 cells seeded in culture plates to assess their viability and the formation of mineralized nodules (MN; Alizarin Red) after seven days. The data were analyzed using one-way analysis of variance/Tukey or Games-Howell tests (α = 5%). RESULTS SDF and PC significantly reduced the viability of cells seeded on discs (45.6% and 71.0%, respectively). Only cells treated with SDF or PC detached from the dentin substrate, while the remaining cells showed altered morphology. Cells in contact with extracts showed less reduction in viability, but it was still more toxic compared to NC. Only PC reduced MN deposition. SDF + KI or KI alone did not affect the cell response. CONCLUSIONS SDF applied alone showed a mild to moderate transdentinal cytotoxic effect on pulp cells. However, the combination of SDF + KI reduced the cytotoxic effects. Both materials used alone or in combination did not affect the mineralization ability of pulp cells. CLINICAL RELEVANCE Besides improving esthetic results, associating potassium iodide with silver diamine fluoride may reduce the transdentinal cytotoxic effects of this cariostatic agent on pulp cells.
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Affiliation(s)
- Lídia de Oliveira Fernandes
- Department of Restorative Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Igor Paulino Mendes Soares
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | - Caroline Anselmi
- Department of Morphology and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua Humaitá, 1680, Araraquara, 14801-903, Brazil
| | - Maria Luiza Barucci Araujo Pires
- Department of Morphology and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua Humaitá, 1680, Araraquara, 14801-903, Brazil
| | | | - Victória Peruchi
- Department of Dental Materials and Prosthodontics, School of Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | | | - Josimeri Hebling
- Department of Morphology and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Rua Humaitá, 1680, Araraquara, 14801-903, Brazil.
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Isil T, Ozlem K, Defne BH, Eray GM, Abdurrahim K. Toxicity evaluation of indocyanine green mediated photodynamic therapy. Photodiagnosis Photodyn Ther 2023; 44:103754. [PMID: 37595656 DOI: 10.1016/j.pdpdt.2023.103754] [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: 05/05/2023] [Revised: 08/13/2023] [Accepted: 08/15/2023] [Indexed: 08/20/2023]
Abstract
BACKGROUND The aim of the study is to determine the cytotoxic, genotoxic and inflammatory effects of indocyanine green (ICG) mediated photodynamic therapy (PDT) in direct contact with L-929 mouse fibroblast cells and over a dentin barrier. METHODS Eight groups were evaluated; control (C), group with a dentin barrier (D), ICG applied directly on the cells (ICG), ICG applied over a dentin barrier (D-ICG), only laser applied (L), laser applied over a dentin barrier (D-L), ICG and laser applied directly on the cells (ICG-L), ICG and laser applied over a dentin barrier (D-ICG-L). Cell viability was evaluated via ATP Assay, DNA damage was evaluated via Comet Assay, and inflammatory markers IL-1β and TNF-α were assessed via ELISA test. RESULTS Cell viability decreased in group ICG (p<0.001). Cell viability decrease was higher in Group ICG-L (p<0.001). Cell viability decrease was lower in group D-ICG-L (p>0.05). Group L caused an increase in cell number (p<0.001). DNA damage was observed in ICG, D-ICG, and ICG-L groups (p<0.05). None of the groups displayed an increase of inflammatory markers IL-1β and TNF-α (p>0.05). CONCLUSIONS The presence of dentin between ICG and cells acted as a barrier and protected the cells. ICG-mediated PDT did not cause any cytotoxic, genotoxic or inflammatory effect. The use of ICG-mediated PDT for cavity disinfection is acceptable, but at this concentration its use in periodontal pocket disinfection is not recommended due to its cytotoxic and genotoxic properties.
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Affiliation(s)
- Turp Isil
- BezmialemVakif University, Faculty of Dentistry, Department of Prosthodontics, Istanbul, Turkey
| | - Kara Ozlem
- BezmialemVakif University, Faculty of Dentistry, Department of Prosthodontics, Istanbul, Turkey.
| | | | - Guler Metin Eray
- University of Health Sciences Turkey, Hamidiye School of Medicine, Department of Medical Biochemistry, Istanbul, Turkey; University of Health Sciences Turkey, Hamidiye Faculty of Medicine, Haydarpasa Numune Health Application and Research Center, Department of Medical Biochemistry, Istanbul, Turkey
| | - Kocyigit Abdurrahim
- BezmialemVakif University, Faculty of Medicine, Department of Medical Biochemistry, Istanbul, Turkey
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Liu Z, Du Y, Xu S, Li M, Lu X, Tian G, Ye J, Zhao B, Wei P, Wang Y. Histatin 1-modified SIS hydrogels enhance the sealing of peri-implant mucosa to prevent peri-implantitis. iScience 2023; 26:108212. [PMID: 37965149 PMCID: PMC10641262 DOI: 10.1016/j.isci.2023.108212] [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: 05/27/2023] [Revised: 09/15/2023] [Accepted: 10/11/2023] [Indexed: 11/16/2023] Open
Abstract
Dental implants make it possible to replace teeth in more sophisticated ways. Nevertheless, peri-implantitis is one of the leading causes of implant failure, which can be avoided with proper soft tissue sealing. The aim of this study was to achieve the promotion of the synthesis of peri-implant epithelial hemidesmosome through Histatin 1 and porcine small intestinal submucosa (SIS) hydrogel to form a good peri-implant seal. The results show that hydrogel can improve the biological barrier function around implants by combining antibacterial, promoting soft tissue healing and promoting epithelial bonding. This means that the morphology and anti-infection ability of soft tissue are enhanced, which ensures the long-term stability of the implant.SIS-Hst1 hydrogel has certain clinical application in the prevention and early treatment of peri-implantitis. In conclusion, Hst1-SIS hydrogel, as a local administration system, provides experimental evidence for the prevention of peri-implant disease.
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Affiliation(s)
- Zihao Liu
- Zhongnuo Dental Hospital, Tianjin Nankai District, Tianjin 300101, China
| | - Yaqi Du
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 30070, China
| | - Shendan Xu
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 30070, China
| | - Minting Li
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 30070, China
| | - Xuemei Lu
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 30070, China
| | - Guangjie Tian
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 30070, China
| | - Jing Ye
- Department of Stomatology, Tianjin Hospital, Tianjin 300211, China
| | - Bo Zhao
- Beijing Biosis Healing Biological Technology Co., Ltd., Beijing 102600, China
| | - Pengfei Wei
- Beijing Biosis Healing Biological Technology Co., Ltd., Beijing 102600, China
| | - Yonglan Wang
- School and Hospital of Stomatology, Tianjin Medical University, Tianjin 30070, China
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Assis HCD, Bertolini GR, Sousa-Neto MD, Lopes-Olhê FC. Analysis of the adhesive interface of dentine treated with carbodiimide and chitosan before cementation of fiberglass posts with different resin cements. J Biomed Mater Res B Appl Biomater 2023; 111:1840-1852. [PMID: 37287402 DOI: 10.1002/jbm.b.35289] [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: 11/17/2022] [Revised: 03/27/2023] [Accepted: 05/18/2023] [Indexed: 06/09/2023]
Abstract
The objective of this study is to evaluate the effect of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) and chitosan (CHI) on the adhesive interface of resin cements to root dentine. Forty-five upper canines were sectioned, endodontically treated, prepared and divided into three groups according to dentine treatment (distilled water-DW, CHI 0.2% and EDC 0.5) and in three subgroups according to resin cement: RelyX ARC, Panavia F 2.0 or RelyX U200. Slices were obtained, with five slices of each third submitted to the analysis of the adaptation of the adhesive interface through scores and the perimeter with gaps in confocal laser scanning microscopy and one slice of each third later evaluated qualitatively in scanning electron microscopy. The results were analyzed using with Kruskal-Wallis and Spearman correlation tests. There was no difference in adaptation for the different resin cements (p = .438). EDC presented better adaptation when compared to the groups treated with DW and CHI (p < .001), while the CHI and DW presented similar adaptation values (p = .365). No difference was observed in the perimeter referring to the gap areas for the different resin cements (p = .510). EDC showed a lower percentage of perimeters with gaps when compared to CHI (p < .001), with the percentage of perimeter with gaps of teeth treated with CHI being lower than DW (p < .001). A positive correlation coefficient equal to 0.763 was obtained between the perimeter with gaps and the adaptation data of the adhesive interface (p < .001). EDC resulted in better adaptation of the adhesive interface and a lower percentage of perimeters with gaps compared to chitosan.
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Affiliation(s)
- Helena Cristina de Assis
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Gunther Ricardo Bertolini
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Manoel Damião Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil
| | - Fabiane Carneiro Lopes-Olhê
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, Brazil
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Della Sala F, Malle BM, Ambrosio L, Borzacchiello A. Fermentation-Derived Albumin-Based Hydrogels for Tissue Adhesion Applications. Polymers (Basel) 2023; 15:polym15112530. [PMID: 37299328 DOI: 10.3390/polym15112530] [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: 05/05/2023] [Revised: 05/24/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023] Open
Abstract
Currently, most of the clinically available surgical glues and sealants lack elasticity, good adhesion and biocompatibility properties. Hydrogels as tissue adhesives have received extensive attention for their tissue-mimicking features. Here, a novel surgical glue hydrogel based on a fermentation-derived human albumin (rAlb) and biocompatible crosslinker for tissue-sealant applications has been developed. In order to reduce the risks of viral transmission diseases and an immune response, Animal-Free Recombinant Human Albumin from the saccharomyces yeast strain was used. A more biocompatible crosslinking agent, 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC), was used and compared with glutaraldehyde (GA). The design of crosslinked albumin-based adhesive gels was optimized by varying the albumin concentration, the mass ratio between albumin and the crosslinking agent as well as the crosslinker type. Tissue sealants were characterized in terms of mechanical (tensile and shear), adhesive and in vitro biocompatibility properties. The results indicated that the mechanical and adhesive properties improved as the albumin concentration increased and the mass ratio between albumin and crosslinker decreased. Moreover, the EDC-crosslinked albumin gels have better biocompatibility properties than GA-crosslinked glues.
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Affiliation(s)
- Francesca Della Sala
- Institute of Polymers, Composites and Biomaterials, National Research Council (IPCB-CNR), Viale J.F. Kennedy 54, 80125 Naples, Italy
| | | | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials, National Research Council (IPCB-CNR), Viale J.F. Kennedy 54, 80125 Naples, Italy
| | - Assunta Borzacchiello
- Institute of Polymers, Composites and Biomaterials, National Research Council (IPCB-CNR), Viale J.F. Kennedy 54, 80125 Naples, Italy
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Li S, Wu P, Ji Z, Zhang Y, Zhang P, He Y, Shen Y. In vitro biocompatibility study of EDC/NHS cross-linked silk fibroin scaffold with olfactory ensheathing cells. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2023; 34:482-496. [PMID: 36285432 DOI: 10.1080/09205063.2022.2135076] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In this paper, we investigated silk fibroin (SF) cross-linked by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-hydroxysuccinimide (EDC/NHS) and its biocompatibility with olfactory ensheathing cells (OECs). After cross-linked with different concentrations of EDC/NHS solutions, SF scaffolds were analyzed by different techniques such as scanning electron microscopy, Fourier transform infrared spectra, x-ray diffraction, tensile machine and water contact angle assay. As to their structures, we found 4.5% EDC/NHS cross-linked SF possessed a more significant increase of β-sheet and a decrease of α-helix than 1.5% group. These changes helped SF achieve excellent mechanical properties. While more remarkable improvement of hydrophilicity was seen in 1.5% EDC/NHS treated SF. Immunofluorescence, MTT, Annexin-V/PI and ELISA analysis were then conducted to determine the states and functions of OECs on the scaffolds. OECs on 4.5% EDC/NHS cross-linked SF seemed insufficient to spread, and the proliferation was limited on 4 and 6 days. Moreover, 4.5% EDC/NHS exerted adverse effects on cell survival and nerve growth factor (NGF) secretion at day 4, but not 1.5% EDC/NHS. Taken together, SF scaffolds showed improved physical and hydrophilic properties through cross-linking. 1.5% EDC/NHS cross-linked SF scaffolds showed significant advantages between mechanical property and the states and functions with OECs, which has the potential to be used for neural repairing.
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Affiliation(s)
- Shengwen Li
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Second Department of Orthopaedics, Haining People's Hospital, Haining, Zhejiang, China
| | - Peng Wu
- Department of Orthopedics, The Second Hospital of Jingzhou, Jingzhou, Hubei, China
| | - Zhongqing Ji
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.,Department of Orthopedics, Yongding Hospital, Suzhou, Jiangsu, China
| | - Yu Zhang
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Peng Zhang
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Yongqing He
- Second Department of Orthopaedics, Haining People's Hospital, Haining, Zhejiang, China
| | - Yixin Shen
- Department of Orthopedics, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
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Effect of dentin biomodification using natural collagen cross-linkers on the durability of the resin-dentin bond and demineralized dentin stiffness. J Mech Behav Biomed Mater 2023; 138:105551. [PMID: 36459707 DOI: 10.1016/j.jmbbm.2022.105551] [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: 09/13/2022] [Revised: 10/27/2022] [Accepted: 10/31/2022] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The purpose of this study was to evaluate the effect of using natural cross-linkers as sumac and curcumin on the durability of the resin-dentin bond and stiffness of demineralized dentin matrix. METHODS Thirty sound molars were divided into 5 groups: Control (CO), Grape Seed extract (GSE), Cacao seed extract (CSE), Sumac extract (SE) and Curcumin extract (CE). The teeth had their coronal dentin exposed, etched, and pre-treated for 1 min with the extracts. Teeth were then bonded using Single-Bond II adhesive and 4 mm composite was built up on dentin surface. Teeth were sectioned into 1 × 1 × 8mm beams and their micro-tensile bond strength (μTBS) was tested after 24 h and 6 months of water storage. For stiffness testing, 15 teeth were sectioned to obtain dentin beams (1 × 1 × 6.5 mm), the beams were demineralized in 10% phosphoric acid then rinsed and divided into 5 groups. Beams were then immersed in their respective extract solution for 1 min after which they were subjected to a 3- point loading test using a universal testing machine to calculate their modulus of elasticity. RESULTS After 24 h, no significant difference in μTBS was shown between all groups. After 6 Months, GSE, CE, and SE showed significantly higher μTBS compared to CO (p ≥ 0.05). For the modulus of elasticity; only GSE showed a significantly higher modulus compared to other groups. CLINICAL RELEVANCE The application of grape seed extract, curcumin and sumac extract as dentin pre-treatments appear to be a promising approach to enhance the durability of the resin-dentin bond in a clinically relevant application time.
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Ghazvehi K, Saffarpour A, Habibzadeh S. Effect of pretreatment with matrix metalloproteinase inhibitors on the durability of bond strength of fiber posts to radicular dentin. Clin Exp Dent Res 2022; 8:893-899. [PMID: 35726182 PMCID: PMC9382050 DOI: 10.1002/cre2.569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 03/11/2022] [Accepted: 03/12/2022] [Indexed: 11/25/2022] Open
Abstract
Objectives Application of matrix metalloproteinases inhibitors has been suggested to improve the durability of resin–dentin bonding. The purpose of this study was to evaluate the effect of dimethyl sulfoxide (DMSO), carbodiimide (EDC), and chlorhexidine (CHX) treatment on the push‐out bond strength of fiber posts to radicular dentin. Materials and Methods 24 extracted premolars were assigned randomly to 4 groups after root canal treatment and post space preparation (n = 6). In the first, second, and third groups, radicular dentin was treated with 1 ml of 5% DMSO, 0.3 M EDC, and 2% CHX, respectively. The fourth group (control) received no treatment. The root canals were primed with ED primer II, and the fiber posts were cemented with Panavia F2.0. In each group, half of the specimens were subjected to the push‐out test and the other half to 3000 thermal cycles before testing. Data were analyzed using two‐way analysis of variance via SPSS version 20 (p < .05). Results Among the nonthermocycled specimens, the values of push‐out bond strength were observed in the control, EDC, CHX, and DMSO groups, in decreasing order. Among the thermocycled specimens, the values were observed in the control, EDC, DMSO, and CHX groups in decreasing order. Thermocycling had a significant adverse effect on the push‐out bond strength (p = .015), but the effect of material (p = .375), and the interaction effect of material and thermocycling (p = .998) were not significant. Conclusions Application of CHX, DMSO, and EDC had no significant effect on the bond strength of fiber posts to radicular dentin.
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Affiliation(s)
- Kiamehr Ghazvehi
- Department of Prosthodontics, School of Dentistry, International Campus Tehran University of Medical Sciences Tehran Iran
| | - Aida Saffarpour
- Dental Research Center, Dentistry Research Institute Tehran University of Medical Sciences Tehran Iran
- Department of Operative Dentistry, School of Dentistry, International Campus Tehran University of Medical Sciences Tehran Iran
| | - Sareh Habibzadeh
- Department of Prosthodontics, School of Dentistry, International Campus Tehran University of Medical Sciences Tehran Iran
- Dental Research Center, Dentistry Research Institute Tehran University of Medical Sciences Tehran Iran
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12
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Degradation and Stabilization of Resin-Dentine Interfaces in Polymeric Dental Adhesives: An Updated Review. COATINGS 2022. [DOI: 10.3390/coatings12081094] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Instability of the dentine-resin interface is owed to the partial/incomplete penetration of the resin adhesives in the collagen fibrils. However, interfacial hydrolysis of the resin-matrix hybrid layer complex activates the collagenolytic and esterase enzymes that cause the degradation of the hybrid layer. Adequate hybridization is often prevented due to the water trapped between the interfibrillar spaces of the collagen network. Cyclic fatigue rupture and denaturation of the exposed collagen fibrils have been observed on repeated application of masticatory forces. To prevent interfacial microstructure, various approaches have been explored. Techniques that stabilize the resin–dentine bond have utilized endogenous proteases inhibitors, cross linking agents’ incorporation in the exposed collagen fibrils, an adhesive system free of water, and methods to increase the monomer penetration into the adhesives interface. Therefore, it is important to discover and analyze the causes of interfacial degradation and discover methods to stabilize the hybrid layer to execute new technique and materials. To achieve a predictable and durable adhesive resin, restoration is a solution to the many clinical problems arising due to microleakage, loss of integrity of the restoration, secondary caries, and postoperative sensitivity. To enhance the longevity of the resin-dentine bond strength, several experimental strategies have been carried out to improve the resistance to enzymatic degradation by inhibiting intrinsic collagenolytic activity. In addition, biomimetic remineralization research has advanced considerably to contemporary approaches of both intrafibrillar and extrafibrillar remineralization of dental hard tissues. Thus, in the presence of biomimetic analog complete remineralization of collagen, fibers are identified.
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13
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Maravic T, Mancuso E, Comba A, Checchi V, Generali L, Mazzitelli C, Josic U, Hass V, Reis A, Loguercio AD, Tay FR, Breschi L, Mazzoni A. Dentin Cross-linking Effect of Carbodiimide After 5 Years. J Dent Res 2021; 100:1090-1098. [PMID: 34009064 DOI: 10.1177/00220345211014799] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Carbodiimide (EDC)-based dentin primers preserve hybrid layer (HL) integrity. However, aging >1 y has not been investigated. The present study examined whether the cross-linking effect of EDC was reflected in dentin bond strength, endogenous enzymatic activity, and the chemical profile of the HL after 5-y aging in artificial saliva. Noncarious human third molars (N = 42) were cut to expose middle/deep coronal dentin and treated as follows: group 1, dentin etched with 35% H3PO4, pretreated with a 0.3M aqueous EDC primer for 1 min and restored with XP Bond (Dentsply Sirona); group 2, as in group 1 but without EDC pretreatment; group 3, Clearfil SE Bond (Kuraray-Noritake) primer applied to dentin surface, followed by EDC pretreatment as in group 1 and application of bond; group 4, as in group 3 without EDC pretreatment. After composite buildup, the specimens were cut into sticks or slabs, depending on the experiment. All tests were performed at baseline (T0) and after 5 y of aging (T5) in artificial saliva at 37 °C. Microtensile bond strength (µTBS) was tested at a crosshead speed of 1 mm/min until failure. Endogenous enzymatic activity was investigated with in situ zymography. The chemical profile of HL was determined via Raman spectroscopy. Three-way analysis of variance and post hoc Tukey test were used to analyze µTBS and in situ zymography data (α = 0.05). EDC pretreatment and aging significantly influenced µTBS and in situ zymography results (P < 0.05). Higher bond strength and lower gelatinolytic activity were identified in the EDC-treated groups at T5 (P < 0.05), especially in the etch-and-rinse groups. Raman spectra revealed less defined amide III peaks in control specimens at T5. The EDC cross-linking effect persisted in the HL for 5 y in terms of bond strength, collagen structure preservation, and dentinal enzyme silencing.
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Affiliation(s)
- T Maravic
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - E Mancuso
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - A Comba
- Department of Surgical Sciences, University of Turin, Torino, Italy
| | - V Checchi
- Unit of Dentistry and Oral-maxillo-facial Surgery, Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - L Generali
- Unit of Dentistry and Oral-maxillo-facial Surgery, Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - C Mazzitelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - U Josic
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.,School of Dental Medicine, University of Belgrade, Belgrade, Serbia
| | - V Hass
- School of Dentistry, Oral and Craniofacial Sciences, University of Missouri-Kansas City, Kansas City, Missouri, USA
| | - A Reis
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil
| | - A D Loguercio
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Brazil
| | - F R Tay
- The Dental College of Georgia, Augusta University, Augusta, GA, USA
| | - L Breschi
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
| | - A Mazzoni
- Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy
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14
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Saffarpour A, Valizadeh S, Amini A, Kharazifard MJ, Rohaninasab M. Effect of matrix metalloproteinase inhibitors on microtensile bond strength of dental composite restorations to dentin in use of an etch-and-rinse adhesive system. Clin Exp Dent Res 2020; 6:686-692. [PMID: 32989895 PMCID: PMC7745076 DOI: 10.1002/cre2.313] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 05/22/2020] [Accepted: 06/20/2020] [Indexed: 11/19/2022] Open
Abstract
Aim This study assesses the effect of matrix metalloproteinases on microtensile bond strength (μTBS) of an etch‐and‐rinse adhesive system. Methods This in vitro study evaluated 88 extracted premolars. The teeth were sectioned to expose dentin and were then randomly divided into four groups (n = 22). In group 1 (control), dentin surface was etched, and Adper Single Bond 2 was applied. In groups 2–4, dentin surface was etched and chlorhexidine (CHX), 1‐ethyl‐3‐(3‐dimethylaminopropyl) carbodiimide (EDC), and dimethyl sulfoxide (DMSO) were applied on the surfaces, respectively, and blotted dry. Next, Adper Single Bond 2 was applied and all teeth were built up with Z350 composite. In each group, half the samples immediately and the other half after 10,000 thermal cycles underwent μTBS test. Data were analyzed using ANOVA and Tukey's test (α = .05). Results In thermocycled samples, maximum μTBS was noted in CHX group followed by DMSO, EDC, and control group (p < .001). The thermocycled μTBS of composite to dentin was significantly higher in CHX group compared with EDC, DMSO, and control groups (p < .001) but was not significantly different in EDC and DMSO groups (p = .498). Conclusion The thermocycled μTBS obtained by the application of CHX, EDC, and DMSO was significantly higher compared with the value to the control group.
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Affiliation(s)
- Aida Saffarpour
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences (International Campus), Tehran, Iran
| | - Sara Valizadeh
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Restorative Dentistry Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Mohammad-Javd Kharazifard
- Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Marzieh Rohaninasab
- Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences (International Campus), Tehran, Iran
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15
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Busra MFM, Lokanathan Y. Recent Development in the Fabrication of Collagen Scaffolds for Tissue Engineering Applications: A Review. Curr Pharm Biotechnol 2020; 20:992-1003. [PMID: 31364511 DOI: 10.2174/1389201020666190731121016] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 05/13/2019] [Accepted: 07/08/2019] [Indexed: 11/22/2022]
Abstract
Tissue engineering focuses on developing biological substitutes to restore, maintain or improve tissue functions. The three main components of its application are scaffold, cell and growthstimulating signals. Scaffolds composed of biomaterials mainly function as the structural support for ex vivo cells to attach and proliferate. They also provide physical, mechanical and biochemical cues for the differentiation of cells before transferring to the in vivo site. Collagen has been long used in various clinical applications, including drug delivery. The wide usage of collagen in the clinical field can be attributed to its abundance in nature, biocompatibility, low antigenicity and biodegradability. In addition, the high tensile strength and fibril-forming ability of collagen enable its fabrication into various forms, such as sheet/membrane, sponge, hydrogel, beads, nanofibre and nanoparticle, and as a coating material. The wide option of fabrication technology together with the excellent biological and physicochemical characteristics of collagen has stimulated the use of collagen scaffolds in various tissue engineering applications. This review describes the fabrication methods used to produce various forms of scaffolds used in tissue engineering applications.
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Affiliation(s)
- Mohammad F Mh Busra
- Tissue Engineering Centre, Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Yogeswaran Lokanathan
- Tissue Engineering Centre, Faculty of Medicine, University Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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16
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Nong LM, Zhou D, Zheng D, Jiang YQ, Xu NW, Zhao GY, Wei H, Zhou SY, Han H, Han L. The effect of different cross-linking conditions of EDC/NHS on type II collagen scaffolds: an in vitro evaluation. Cell Tissue Bank 2019; 20:557-568. [PMID: 31583486 DOI: 10.1007/s10561-019-09790-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 09/28/2019] [Indexed: 02/07/2023]
Abstract
The purpose of this paper is to analyze the properties of porcine cartilage type II collagen scaffolds crosslinked with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/N-hydroxy-succinamide (EDC/NHS) under different conditions. The porous EDC/NHS-crosslinked scaffolds were obtained through a two-step freeze-drying process. To determine the optimal crosslinking condition, we used different solvents and various crosslinking temperatures to prepare the scaffolds. Three crosslinking solutions were prepared with different solvents, photographs were taken with a flash in the darkroom, and light transmission was observed. Type II collagen was crosslinked on a horizontal shaker at a speed of 60 r/min according to the above grouping conditions, and then the structural change of the scaffold in each group was observed. To investigate the swelling ratio and the in vitro degradation of the collagen scaffold, tests were also carried out by immersion of the scaffolds in a PBS solution and digestion in type II collagenase, respectively. The influence of the scaffolds on the proliferation of chondrocytes was assessed by the methyl thiazolyl tetrazolium colorimetric assay. The morphology of the crosslinked scaffolds cocultured with chondrocytes was characterized by a scanning electron microscope. The results proved that 75% alcohol and a crosslinking temperature of 37 °C are recommended. Collagen fibrils are more densely packed after crosslinking with EDC/NHS and have a more uniform structure than that of noncrosslinked ones. The EDC-crosslinked scaffolds possessed excellent mechanical property and biocompatibility.
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Affiliation(s)
- Lu-Ming Nong
- Orthopedics Department, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu Province, China
| | - Dong Zhou
- Orthopedics Department, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu Province, China
| | - Dong Zheng
- Orthopedics Department, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu Province, China
| | - Yu-Qing Jiang
- Orthopedics Department, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu Province, China
| | - Nan-Wei Xu
- Orthopedics Department, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu Province, China
| | - Gong-Yin Zhao
- Orthopedics Department, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu Province, China
| | - Hui Wei
- Orthopedics Department, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu Province, China
| | - Si-Yuan Zhou
- Laboratory Department, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu Province, China
| | - Hui Han
- General Surgery Department, Huaiyin Hospital of Huai'an City, Huai'an, 223300, Jiangsu Province, China
| | - Long Han
- Orthopedics Department, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, Changzhou, 213000, Jiangsu Province, China.
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17
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Prevention of lipid loss from hair by surface and internal modification. Sci Rep 2019; 9:9834. [PMID: 31285480 PMCID: PMC6614367 DOI: 10.1038/s41598-019-46370-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 06/27/2019] [Indexed: 11/08/2022] Open
Abstract
Surfactants during routine washing have a tremendous effect on lipid loss from hair. This study aims to understand the loss of lipids from hair upon contact with surfactants and develop a way to prevent the lipid loss. The change in lipid levels depends on the relative hydrophobicity of the lipid. We herein propose that the change in lipid levels can be protected by two modifications. In the case of fatty acids and cholesterol (group A), the concentration difference between virgin hair versus surface modified hair with highly charged polymer was 22 to 32% higher after washing with surfactants while the loss of squalene and wax esters (group B) in response to surfactants still occurred even after the surface modification. In the hair treated by internal modification with the carbodiimide reaction, 52.0 to 81.3% more lipids in group B were prevented than in the untreated hair. Finally, different types of lipids were successfully protected by surface and internal modifications from the surfactant treatment. This study will be the basis for understanding the mechanisms by which surfactants damage the lipid barrier of tissues including hair and for establishing strategies to defend the barrier.
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18
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Resin-Dentin Bonding Interface: Mechanisms of Degradation and Strategies for Stabilization of the Hybrid Layer. Int J Biomater 2019; 2019:5268342. [PMID: 30853990 PMCID: PMC6378048 DOI: 10.1155/2019/5268342] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 12/03/2018] [Accepted: 12/28/2018] [Indexed: 12/14/2022] Open
Abstract
Several studies have shown that the dentin-resin interface is unstable due to poor infiltration of resin monomers into the demineralized dentin matrix. This phenomenon is related to the incomplete infiltration of the adhesive system into the network of exposed collagen fibrils, mainly due to the difficulty of displacement and subsequent replacement of trapped water between interfibrillar spaces, avoiding adequate hybridization within the network of collagen fibrils. Thus, unprotected fibrils are exposed to undergo denaturation and are susceptible to cyclic fatigue rupture after being subjected to repetitive loads during function. The aqueous inclusions within the hybrid layer serve as a functional medium for the hydrolysis of the resin matrix, giving rise to the activity of esterases and collagenolytic enzymes, such as matrix metalloproteinases, which play a fundamental role in the degradation process of the hybrid layer. Achieving better interdiffusion of the adhesive system in the network of collagen fibrils and the substrate stability in the hybrid layer through different strategies are key events for the interfacial microstructure to adequately function. Hence, it is important to review the factors related to the mechanisms of degradation and stabilization of the hybrid layer to support the implementation of new materials and techniques in the future. The enzymatic degradation of collagen matrix, together with resin leaching, has led to seeking strategies that inhibit the endogenous proteases, cross-linking the denudated collagen fibrils and improving the adhesive penetration removing water from the interface. Some of dentin treatments have yielded promising results and require more research to be validated. A longer durability of adhesive restorations could resolve a variety of clinical problems, such as microleakage, recurrent caries, postoperative sensitivity, and restoration integrity.
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19
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dos Santos AF, Pacheco JM, Silva PAO, Bedran-Russo AK, Rezende TMB, Pereira PNR, Ribeiro APD. Direct and transdentinal biostimulatory effects of grape seed extract rich in proanthocyanidin on pulp cells. Int Endod J 2018; 52:424-438. [DOI: 10.1111/iej.13019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 09/19/2018] [Indexed: 12/29/2022]
Affiliation(s)
- A. F. dos Santos
- Department of Dentistry; Faculty of Health Sciences; University of Brasília; Brasilia Brazil
| | - J. M. Pacheco
- Department of Dentistry; Faculty of Health Sciences; University of Brasília; Brasilia Brazil
| | - P. A. O. Silva
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia; Universidade Católica de Brasília; Brasilia Brazil
| | - A. K. Bedran-Russo
- Department of Restorative Dentistry; UIC College of Dentistry; Chicago IL USA
| | - T. M. B. Rezende
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia; Universidade Católica de Brasília; Brasilia Brazil
| | - P. N. R. Pereira
- Department of Restorative Dental Sciences; College of Dentistry; University of Florida; Gainesville FL USA
| | - A. P. D. Ribeiro
- Department of Restorative Dental Sciences; College of Dentistry; University of Florida; Gainesville FL USA
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20
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Jun SK, Mahapatra C, Lee HH, Kim HW, Lee JH. Biological Effects of Provisional Resin Materials on Human Dental Pulp Stem Cells. Oper Dent 2018; 42:E81-E92. [PMID: 28257256 DOI: 10.2341/16-137-l] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVES This study investigated the in vitro cytotoxicity as well as the proinflammatory cytokine expression of provisional resin materials on primary cultured human dental pulp stem cells (hDPSCs). METHODS Five commercially available provisional resin materials were chosen (SNAP [SN], Luxatemp [LT], Jet [JE], Revotek LC [RL], and Vipi block [VB]). Eluates that were either polymerizing or already set were added to hDPSCs under serially diluted conditions divided into three different setting times (25% set, 50% set, and 100% set) and incubated for 24 hours with 2× concentrated culture media. Cell cytotoxicity tests were performed by LDH assay and live and dead confocal microscope images. The expression of proinflammatory cytokines in SN and VB was measured using cytokine antibody arrays. Data were analyzed using repeated measures analysis of variance (ANOVA) or ANOVA followed by the Tukey post hoc test at a significance level of p<0.05. RESULTS Cytotoxicity greater than 30% was observed in the 50% diluted culture in SN, LT, and JE in the already set stage (p<0.05), while it was detected in SN and LT in early or intermediate stage samples. The cytotoxicity of SN, JE, and LT was greater with eluates from the polymerizing phase compared to that from already set samples (p<0.05), as observed by live and dead images. On the other hand, RL and VB did not exhibit cytotoxicity greater than 30%. Proinflammatory cytokines were not detected in 12.5% diluted culture with eluates from VB and early set stage SN. CONCLUSIONS The eluates from chemical-activated provisional resin materials during polymerization (SN, LT, and JE) were cytotoxic to hDPSCs and may adversely affect pulp tissue.
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21
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Huang Y, Wang Y, Chen L, Zhang L. Facile construction of mechanically tough collagen fibers reinforced by chitin nanofibers as cell alignment templates. J Mater Chem B 2018; 6:918-929. [DOI: 10.1039/c7tb02945d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Reconstituted collagen fibers with excellent mechanical performance were successfully fabricated with sodium alginate as coagulate and chitin nanofibers as reinforcing filler and applied as a fibroblast alignment templated scaffold.
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Affiliation(s)
- Yao Huang
- Department of Agricultural
- Food and Nutritional Science
- University of Alberta
- Edmonton
- Canada
| | - Yixiang Wang
- Department of Agricultural
- Food and Nutritional Science
- University of Alberta
- Edmonton
- Canada
| | - Lingyun Chen
- Department of Agricultural
- Food and Nutritional Science
- University of Alberta
- Edmonton
- Canada
| | - Lina Zhang
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- China
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22
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Alonso JRL, Basso FG, Scheffel DLS, de-Souza-Costa CA, Hebling J. Effect of crosslinkers on bond strength stability of fiber posts to root canal dentin and in situ proteolytic activity. J Prosthet Dent 2017; 119:494.e1-494.e9. [PMID: 29195822 DOI: 10.1016/j.prosdent.2017.08.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 08/01/2017] [Accepted: 08/01/2017] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM Improved stability of the adhesive interface can be obtained using crosslinkers. However, research on the use of crosslinkers in root dentin is lacking. PURPOSE The purpose of this in vitro study was to evaluate the effect of crosslinkers on the proteolytic activity of root dentin and on the bond strength of resin-cemented fiber posts. MATERIAL AND METHODS Single root canals were obtained from premolars (n=48) and endodontically treated before being divided into 4 groups: deionized water (control), 0.5 mol/L carbodiimide, 5% proanthocyanidin, or 5% glutaraldehyde. After removing the canal sealer, the dentin was etched with phosphoric acid, followed by water rinsing and the application of the crosslinkers for 60 seconds. Fiber posts were cemented using an adhesive (Single Bond 2) and resin cement (RelyX ARC). The roots were then transversally sectioned to obtain 1 mm thick specimens from the cervical, middle, and apical thirds and then aged for 24 hours or 9 months. Nine roots per group were used for the push-out test and 3 for determining the proteolytic activity of the root dentin by in situ zymography. Bond strength data were submitted to a mixed-model ANOVA and Bonferroni tests (α=.05). RESULTS Only proanthocyanidin negatively affected the 24-hour bond strength. After 9 months, a significant decrease in bond strength was seen for all groups, except for the crosslinked treated specimens from the cervical third of the root canal. Intense gelatinolytic activity was detected in the control group after 24 hours but was inhibited in the crosslinker-treated groups. Proteolytic activity was also not detected after 9 months for the groups treated with the crosslinkers, irrespective of the root canal third. Conversely, proteolytic activity increased for the specimens from the control group. CONCLUSIONS Although no proteolytic activity was detected in the hybrid layers along the entire root canal, dentin biomodification with crosslinkers was effective in preventing bond strength loss only in the cervical third.
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Affiliation(s)
- Juliana R L Alonso
- Assistant researcher, Department of Oral Rehabilitation, São Paulo State University (UNESP), School of Dentistry, São Paulo, Brazil
| | - Fernanda G Basso
- Postdoctoral researcher, Department of Physiology and Pathology, São Paulo State University (UNESP), School of Dentistry, São Paulo, Brazil
| | - Débora L S Scheffel
- Postdoctoral researcher, Department of Pediatric Dentistry and Orthodontics, São Paulo State University (UNESP), School of Dentistry, São Paulo, Brazil
| | - Carlos Alberto de-Souza-Costa
- Professor, Department of Physiology and Pathology, São Paulo State University (UNESP), School of Dentistry, São Paulo, Brazil
| | - Josimeri Hebling
- Professor, Department of Pediatric Dentistry and Orthodontics, São Paulo State University (UNESP), School of Dentistry, São Paulo, Brazil.
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Liu Z, Li F, Zhang L, Yu H, Yu F, Chen J. The effect of active components from citrus fruits on dentin MMPs. Arch Oral Biol 2017; 83:111-117. [DOI: 10.1016/j.archoralbio.2017.07.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 07/08/2017] [Accepted: 07/09/2017] [Indexed: 10/19/2022]
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Chen Y, Wang F, Zhang N, Li Y, Cheng B, Zheng Y. Preparation of a 6-OH quaternized chitosan derivative through click reaction and its application to novel thermally induced/polyelectrolyte complex hydrogels. Colloids Surf B Biointerfaces 2017; 158:431-440. [DOI: 10.1016/j.colsurfb.2017.07.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 06/21/2017] [Accepted: 07/08/2017] [Indexed: 01/29/2023]
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Kulakowski D, Leme-Kraus AA, Nam JW, McAlpine J, Chen SN, Pauli GF, Ravindran S, Bedran-Russo AK. Oligomeric proanthocyanidins released from dentin induce regenerative dental pulp cell response. Acta Biomater 2017; 55:262-270. [PMID: 28365481 DOI: 10.1016/j.actbio.2017.03.051] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 03/01/2017] [Accepted: 03/28/2017] [Indexed: 01/04/2023]
Abstract
Proanthocyanidins (PACs) are plant-derived, multifunctional compounds that possess high interactivity with extracellular matrix (ECM) components. The documented affinity of PACs for type-I collagen is directly correlated with their structural features and degree of polymerization. In this investigation, centrifugal partition chromatography (CPC) was used to sequentially deplete less active monomeric and polymeric PACs from a crude Pinus massoniana bark extract to create refined mixtures enriched in oligomeric PACs. The ability of these oligomeric PACs to modify the mechanical properties of the dentin collagen matrix and their biocompatibility with dental pulp cells (DPCs) was evaluated in an innovative biomimetic environment. The refined mixtures displayed high interactivity with dentin collagen as demonstrated by a significant increase (>5-fold) in the modulus of elasticity of the dentin matrix. In a simplified model of the dentin-DPC complex, DPCs embedded within their native ECM in the presence of PAC-treated dentin exhibited increased proliferation. Quantitative gene expression analyses indicated that exposure to PAC-treated dentin increased the expression of key biomineralization and odontogenic differentiation regulators, including RUNX2, BMP2, OCN, and DSPP. LC-MS/MS analysis revealed that PACs two to four units long (dimers, trimers, and tetramers) were being released from dentin into media, influencing cell behavior. Overall, the results suggested that PAC dimers, trimers, and tetramers are not only biocompatible, but enhance the differentiation of DPCs towards a phenotype that favors biomineralization. PAC-enriched refined mixtures can influence the field of biomaterials and regeneration by serving as renewable, non-cytotoxic agents that can increase the mechanical properties of biomaterials. STATEMENT OF SIGNIFICANCE Pine bark extract is a renewable source of structurally diverse proanthocyanidins (PACs), multifunctional compounds whose interaction with collagen can be tailored to specific purposes by enrichment of selected PACs from the complex mixture. Oligomeric PACs were enriched from the extract and were shown here to sustain desired tissue modification and were thus assessed for cellular response in a model of the dentin-pulp interface. This model was developed to mimic leaching of potentially reactive compounds into pulp tissue. Dental pulp cells exposed to PAC-treated dentin showed increased proliferation and expression of genes necessary for extracellular matrix deposition and biomineralization, processes crucial for forming new dentin. Thus, collagen-interactive PACs may also enhance tissue regeneration and have broad impact in tissue engineering.
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Affiliation(s)
- Daniel Kulakowski
- Department of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Ariene A Leme-Kraus
- Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Joo-Won Nam
- Department of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States; College of Pharmacy, Yeungnam University, Gyeongsan, Gyeongbuk 712-749, Republic of Korea
| | - James McAlpine
- Department of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Shao-Nong Chen
- Department of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Guido F Pauli
- Department of Medicinal Chemistry & Pharmacognosy, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Sriram Ravindran
- Department of Oral Biology, College of Dentistry, University of Illinois at Chicago, Chicago, IL 60612, United States.
| | - Ana K Bedran-Russo
- Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL 60612, United States
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Lingling J, Qianbing W. [Progress on matrix metalloproteinase inhibitors]. HUA XI KOU QIANG YI XUE ZA ZHI = HUAXI KOUQIANG YIXUE ZAZHI = WEST CHINA JOURNAL OF STOMATOLOGY 2017; 35:208-214. [PMID: 28682555 DOI: 10.7518/hxkq.2017.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Continuing advances in dentin bonding technology and adhesives revolutionized bonding of resin-based composite restorations. However, hybrid layers created by contemporary dentin adhesives present imperfect durability, and degradation of collagen matrix by endogenous enzymes is a significant factor causing destruction of hybrid layers. Bond durability can be improved by using enzyme inhibitors to prevent collagen degradation and to preserve integrity of collagen matrix. This review summarizes progress on matrix metalloproteinase inhibitors (including chlorhexidine, ethylenediaminetetraacetic acid, quaternary ammonium salt, tetracycline and its derivatives, hydroxamic acid inhibitors, bisphosphonate derivative, and cross-linking agents) and suggests prospects for these compounds.
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Affiliation(s)
- Jia Lingling
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Dept. of Prosthetics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Wan Qianbing
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Dept. of Prosthetics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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Delgado LM, Fuller K, Zeugolis DI. * Collagen Cross-Linking: Biophysical, Biochemical, and Biological Response Analysis. Tissue Eng Part A 2017; 23:1064-1077. [PMID: 28071973 DOI: 10.1089/ten.tea.2016.0415] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Extracted forms of collagen are subjected to chemical cross-linking to enhance their stability. However, traditional cross-linking approaches are associated with toxicity and inflammation. This work investigates the stabilization capacity, cytotoxicity and inflammatory response of collagen scaffolds cross-linked with glutaraldehyde (GTA), 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide, 4-arm polyethylene glycol (PEG) succinimidyl glutarate (4SP), genipin (GEN), and oleuropein. Although all cross-linking methods reduced free amine groups, variable data were obtained with respect to denaturation temperature, resistance to collagenase digestion, and mechanical properties. With respect to biological analysis, fibroblast cultures showed no significant difference between the treatments. Although direct cultures with human-derived leukemic monocyte cells (THP-1) clearly demonstrated the cytotoxic effect of GTA, THP-1 cultures supplemented with conditioned medium from the various groups showed no significant difference between the treatments. With respect to cytokine profile, no significant difference in secretion of proinflammatory (e.g., interleukin [IL]-1β, IL-8, tumor necrosis factor-α) and anti-inflammatory (e.g., vascular endothelial growth factor) cytokines was observed between the noncross-linked and the 4SP and GEN cross-linked groups, suggesting the suitability of these agents as collagen cross-linkers.
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Affiliation(s)
- Luis M Delgado
- 1 Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway) , Galway, Ireland .,2 Science Foundation Ireland (SFI), Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway) , Galway, Ireland
| | - Kieran Fuller
- 1 Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway) , Galway, Ireland .,2 Science Foundation Ireland (SFI), Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway) , Galway, Ireland
| | - Dimitrios I Zeugolis
- 1 Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway) , Galway, Ireland .,2 Science Foundation Ireland (SFI), Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway) , Galway, Ireland
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Influence of EDC on Dentin-Resin Shear Bond Strength and Demineralized Dentin Thermal Properties. MATERIALS 2016; 9:ma9110920. [PMID: 28774040 PMCID: PMC5457252 DOI: 10.3390/ma9110920] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 10/03/2016] [Accepted: 10/31/2016] [Indexed: 11/17/2022]
Abstract
This study aimed to evaluate the bonding strength and thermal properties of demineralized dentin with and without EDC treatment. Sound human molars were randomly divided into seven treatment groups (n = 20): control, 80% ethanol, and five EDC ethanol solutions (0.01–1.0 M). In each group, 16 samples were used for bond strength assessment and 4 samples were used for scanning electron microscopy (SEM) analysis. A further 70 intact molars were used to obtain a fine demineralized dentin powder, treated with the same solutions and were evaluated the crosslink degree by ninhydrin test and denaturation temperature (Td) by differential scanning calorimetry. EDC-treated specimens (<1.0 M) had a higher bond strength, especially 0.3 and 0.5 M group, than the control counterpart. There was a significant drop in bond strength of 1.0 M EDC group. SEM revealed a homogeneous and regular interface under all treatments. EDC treatment significantly increased the demineralized dentin cross-link degree and Td compared with the control and ethanol treatments. The 0.3 and 0.5 M treatments showed the highest cross-link degree and Td. In terms of mechnical and theramal properties consideration, 0.3 and 0.5 M EDC solutions may be favorable for when applied with etch-and-rinse adhesives, but it is still needed further long-term study.
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Shafiei F, Yousefipour B, Mohammadi-Bassir M. Effect of Carbodiimide on Bonding Durability of Adhesive-cemented Fiber Posts in Root Canals. Oper Dent 2016; 41:432-40. [PMID: 26794191 DOI: 10.2341/15-099-l] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study was undertaken to investigate whether using a protein cross-linker, 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC), improves bonding stability of fiber posts to root dentin using three resin cements. Sixty human maxillary central incisor roots were randomly divided into six groups after endodontic treatment, according to the cements used with and without EDC pretreatment. In the etch-and-rinse group, 0.3 M EDC aqueous solution was applied on acid-etched root dentin prior to Excite DSC/Variolink II for post cementation. In the self-etch and self-adhesive groups, EDC was used on EDTA-conditioned root space prior to application of ED Primer II/Panavia F2.0 and Clearfil SA, respectively. After microslicing the root dentin, a push-out bond strength (BS) test was performed immediately or after one-year of water storage for each group. Data were analyzed using three-way analysis of variance and Tukey tests (α=0.05). A significant effect of cement type, time, EDC, and Time × Cement and Time × EDC interactions were observed (p≤0.001). EDC pretreatment did not affect immediate bonding of the three cements (p>0.05). Aging significantly reduced the BS in all the groups (p≤0.001), but EDC groups exhibited a higher BS compared with the respective control groups (p<0.001). Despite the significant effect of aging on decreasing the BS of fiber post to radicular dentin, EDC could diminish this effect for the three tested cements.
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Hua J, Li Z, Xia W, Yang N, Gong J, Zhang J, Qiao C. Preparation and properties of EDC/NHS mediated crosslinking poly (gamma-glutamic acid)/epsilon-polylysine hydrogels. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 61:879-92. [PMID: 26838920 DOI: 10.1016/j.msec.2016.01.001] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 12/02/2015] [Accepted: 01/03/2016] [Indexed: 02/05/2023]
Abstract
In this paper, a novel pH-sensitive poly (amino acid) hydrogel based on poly γ-glutamic acid (γ-PGA) and ε-polylysine (ε-PL) was prepared by carbodiimide (EDC) and N-hydroxysuccinimide (NHS) mediated polymerization. The influence of PGA/PL molar ratio and EDC/NHS concentration on the structure and properties was studied. Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) proved that hydrogels were crosslinked through amide bond linkage, and the conversion rate of a carboxyl group could reach 96%. Scanning electron microscopy (SEM) results showed a regularly porous structure with 20 μm pore size in average. The gelation time in the crosslink process of PGA/PL hydrogels was within less than 5 min. PGA/PL hydrogels had excellent optical performance that was evaluated by a novel optotype method. Furthermore, PGA/PL hydrogels were found to be pH-sensitive, which could be adjusted to the pH of swelling media intelligently. The terminal pH of swelling medium could be controlled at 5 ± 1 after equilibrium when the initial pH was within 3-11. The swelling kinetics was found to follow a Voigt model in deionized water but a pseudo-second-order model in normal saline and phosphate buffer solution, respectively. The differential swelling degrees were attributed to the swelling theory based on the different ratio of -COOH/-NH2 and pore size in hydrogels. The results of mechanical property indicated that PGA/PL hydrogels were soft and elastic. Moreover, PGA/PL hydrogels exhibited excellent biocompatibility by cell proliferation experiment. PGA/PL hydrogels could be degraded in PBS solution and the degradation rate was decreased with the increase of the molar ratio of PL. Considering the simple preparation process and pH-sensitive property, these PGA/PL hydrogels might have high potential for use in medical and clinical fields.
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Affiliation(s)
- Jiachuan Hua
- Key Laboratory of Advanced Textile Composites, Tianjin Polytechnic University, Ministry of Education, Tianjin 300387, China; School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China
| | - Zheng Li
- Key Laboratory of Advanced Textile Composites, Tianjin Polytechnic University, Ministry of Education, Tianjin 300387, China; School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China.
| | - Wen Xia
- Key Laboratory of Advanced Textile Composites, Tianjin Polytechnic University, Ministry of Education, Tianjin 300387, China; School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China
| | - Ning Yang
- Key Laboratory of Advanced Textile Composites, Tianjin Polytechnic University, Ministry of Education, Tianjin 300387, China; School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China
| | - Jixian Gong
- Key Laboratory of Advanced Textile Composites, Tianjin Polytechnic University, Ministry of Education, Tianjin 300387, China; School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China
| | - Jianfei Zhang
- Key Laboratory of Advanced Textile Composites, Tianjin Polytechnic University, Ministry of Education, Tianjin 300387, China; School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China.
| | - Changsheng Qiao
- Key Laboratory of Industrial Microbiology, Tianjin University of Science and Technology, Ministry of Education, Tianjin 300457, China
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Yang X, Wang X, Yu F, Ma L, Pan X, Luo G, Lin S, Mo X, He C, Wang H. Hyaluronic acid/EDC/NHS-crosslinked green electrospun silk fibroin nanofibrous scaffolds for tissue engineering. RSC Adv 2016. [DOI: 10.1039/c6ra13713j] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The mechanical properties of SF nanofibrous matrices were enhanced through crosslinking with HA/EDC/NHS for soft tissue engineering.
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Effect of EDTA Conditioning and Carbodiimide Pretreatment on the Bonding Performance of All-in-One Self-Etch Adhesives. Int J Dent 2015; 2015:141890. [PMID: 26557850 PMCID: PMC4629033 DOI: 10.1155/2015/141890] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/26/2015] [Accepted: 09/29/2015] [Indexed: 11/17/2022] Open
Abstract
Objective. This study evaluated the effect of ethylenediaminetetraacetic acid (EDTA) conditioning and carbodiimide (EDC) pretreatment on the shear bond strength of two all-in-one self-etch adhesives to dentin. Methods. Flat coronal dentin surfaces were prepared on one hundred and sixty extracted human molars. Teeth were randomly divided into eight groups according to two different self-etch adhesives used [G-Bond and OptiBond-All-In-One] and four different surface pretreatments: (a) adhesive applied following manufacturer's instructions; (b) dentin conditioning with 24% EDTA gel prior to application of adhesive; (c) EDC pretreatment followed by application of adhesive; (d) application of EDC on EDTA conditioned dentin surface followed by application of adhesive. Composite restorations were placed in all the samples. Ten samples from each group were subjected to immediate and delayed (6-month storage in artificial saliva) shear bond strength evaluation. Data collected was subjected to statistical analysis using three-way ANOVA and post hoc Tukey's test at a significance level of p < 0.05. Results and Conclusion. EDTA preconditioning as well as EDC pretreatment alone had no significant effect on the immediate and delayed bond strengths of either of the adhesives. However, EDC pretreatment on EDTA conditioned dentin surface resulted in preservation of resin-dentin bond strength of both adhesives with no significant fall over six months.
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Scheffel DLS, Soares DG, Basso FG, de Souza Costa CA, Pashley D, Hebling J. Transdentinal cytotoxicity of glutaraldehyde on odontoblast-like cells. J Dent 2015; 43:997-1006. [PMID: 25985981 PMCID: PMC4509972 DOI: 10.1016/j.jdent.2015.05.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 05/05/2015] [Accepted: 05/06/2015] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES This study investigated the transdentinal cytotoxicity of glutahaldehyde-containing solutions/materials on odontoblast-like cells. METHODS Dentin discs were adapted to artificial pulp chambers. MDPC-23 cells were seeded on the pulpal side of the discs and the occlusal surface was treated with the following solutions: water, 2% glutaraldehyde (GA), 5% GA, 10% GA, Gluma Comfort Bond+Desensitizer (GCB+De) or Gluma Desensitizer (GDe). Cell viability and morphology were assessed by the Alamar Blue assay and SEM. The eluates were collected and applied on cells seeded in 24-well plates. After 7 or 14 days the total protein (TP) production, alkaline phosphatase activity (ALP) and deposition of mineralized nodules (MN) were evaluated. RESULTS Data were analyzed by Kruskal-Wallis and Mann-Whitney tests (p<0.05). GA solutions were not cytotoxic against MDPC-23. GCB+De (85.1%) and GDe (77.2%) reduced cell viability as well as TP production and ALP activity at both periods. After 14 days, GCB+De and GDe groups produced less MN. Affected MDPC-23 presented deformation of the cytoskeleton and reduction of cellular projections. CONCLUSIONS The treatment with 2.5%, 5% and 10% GA was not harmful to odontoblast-like cells. Conversely, when GA was combined with other components like HEMA, the final material became cytotoxic. CLINICAL SIGNIFICANCE Glutaraldehyde has been used to decrease dentin hypersensitivity. This substance is also capable of preventing resin-dentin bond degradation by cross-linking collagen and MMPs. This study showed that GA might be safe when applied on acid etched dentin. However, when combined with HEMA the product becomes cytotoxic.
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Affiliation(s)
- Débora Lopes Salles Scheffel
- Department of Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, UNESP-Univ Estadual Paulista, Rua Humaitá, 1680, Araraquara, São Paulo 14801-903, Brazil
| | - Diana Gabriela Soares
- Department of Dental Materials and Prosthodontics, Araraquara School of Dentistry, UNESP-Univ Estadual Paulista, Rua Humaitá, 1680, Araraquara, São Paulo 14801-903, Brazil
| | - Fernanda Gonçalves Basso
- Department of Physiology and Pathology, Araraquara School of Dentistry, UNESP-Univ Estadual Paulista, Rua Humaitá, 1680, Araraquara, São Paulo 14801-903, Brazil
| | - Carlos Alberto de Souza Costa
- Department of Oral Biology, College of Dental Medicine, Georgia Regents University, 1120 15th Street, CL-2112, Augusta, Georgia 30912-1129, USA
| | - David Pashley
- Department of Physiology and Pathology, Araraquara School of Dentistry, UNESP-Univ Estadual Paulista, Rua Humaitá, 1680, Araraquara, São Paulo 14801-903, Brazil
| | - Josimeri Hebling
- Department of Orthodontics and Pediatric Dentistry, Araraquara School of Dentistry, UNESP-Univ Estadual Paulista, Rua Humaitá, 1680, Araraquara, São Paulo 14801-903, Brazil.
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