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Kukulka EC, de Souza JR, de Araújo JCR, de Vasconcellos LMR, Campos TMB, Thim GP, Borges ALS. Polycaprolactone/chlorinated bioglass scaffolds doped with Mg and Li ions: Morphological, physicochemical, and biological analysis. J Biomed Mater Res B Appl Biomater 2023; 111:140-150. [PMID: 35852036 DOI: 10.1002/jbm.b.35140] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 05/30/2022] [Accepted: 07/05/2022] [Indexed: 11/05/2022]
Abstract
The objective was to synthesize and characterize fine polycaprolactone (PCL) fibers associated with a new 58S bioglass obtained by the precipitated sol-gel route, produced by the electrospinning process in order to incorporate therapeutic ions (Mg and Li). In PCL/acetone solutions were added 7% pure bioglass, bioglass doped with Mg(NO3 )2 and Li2 CO3 and were subjected to electrospinning process. The fibers obtained were characterized morphologically, chemically and biologically. The results showed the presence of fine fibers at the nanometric scale and with diameters ranging from 0.67 to 1.92 μm among groups. Groups containing bioglass showed particles both inside and on the surface of the fibers. The components of the polymer, bioglass and therapeutic ions were present in the fibers produced. The produced fibers showed cell viability and induced the formation of mineralization nodules. It was observed the applicability of that methodology in making an improved biomaterial, which adds the osteoinductive properties of the bioglass to PCL and to those of therapeutic ions, applicable to guided bone regeneration.
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Affiliation(s)
- Elisa Camargo Kukulka
- Department of Dental Materials and Prosthesis, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - Joyce Rodrigues de Souza
- Department of Dental Materials and Prosthesis, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - Juliani Carolini Ribeiro de Araújo
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | - Luana Marotta Reis de Vasconcellos
- Department of Bioscience and Oral Diagnosis, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
| | | | - Gilmar Patricínio Thim
- Department of Physics, Technological Institute of Aeronautics (ITA), São José dos Campos, Brazil
| | - Alexandre Luiz Souto Borges
- Department of Dental Materials and Prosthesis, Institute of Science and Technology, São Paulo State University (UNESP), São José dos Campos, Brazil
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Spirandeli BR, Ribas RG, Amaral SS, Martins EF, Esposito E, Vasconcellos LMR, Campos TMB, Thim GP, Trichês ES. Incorporation of 45S5 bioglass via sol-gel in β-TCP scaffolds: Bioactivity and antimicrobial activity evaluation. Mater Sci Eng C Mater Biol Appl 2021; 131:112453. [PMID: 34857256 DOI: 10.1016/j.msec.2021.112453] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 05/04/2021] [Accepted: 09/21/2021] [Indexed: 10/20/2022]
Abstract
In this work, β-TCP (β-tricalcium phosphate) bioresorbable scaffolds were prepared by the gel casting method. Then, they were impregnated with a 45S5 bioglass sol gel solution to improve biocompatibility and promote bioactivity and antimicrobial activity. The β-TCP scaffolds had an apparent porosity of 72%, and after the incorporation of the bioglass, this porosity was maintained. The elements of the bioglass were incorporated into β-TCP matrix and there was a partial transformation from the β-TCP phase to the α-TCP (α-tricalcium phosphate) phase, besides the formation of bioactive calcium and sodium‑calcium silicates. The scaffolds β-TCP with 45S5 bioglass incorporated (β-TCP/45S5) did not show a reduction in their values of mechanical strength and Weibull modulus, despite the partial transformation to the α-TCP phase. Bioactivity, cell viability, and antimicrobial activity improved significantly for the β-TCP/45S5 scaffold comparing to the scaffold without the bioglass. The mineralization of carbonated hydroxyapatite was verified in Simulated Body Fluid (SBF). The cell viability, evaluated by the reduction of 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide - MTT in MG63 cells, increased by 178%, and β-TCP/45S5 scaffold also enhanced cell activity and osteoblast differentiation observed by means of total protein contend and alkaline phosphatase activity, respectively. The formation of growth inhibition zones was also observed in the disk diffusion assay for three tested microorganisms: Staphylococcus aureus, Escherichia coli and Candida albicans. To conclude, the vacuum impregnation method in 45S5 bioglass sol gel solution was effective in penetrating all the interconnected macroporosity of the scaffolds and covering the surface of the struts, which improved their biological properties in vitro, bioactivity and antibacterial activity, without reducing mechanical strength and porosity values. Thus, the β-TCP/45S5 scaffolds are shown as potential candidates for use in tissue engineering, mainly in bone tissue regeneration and recovery.
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Affiliation(s)
- B R Spirandeli
- Federal University of São Paulo (UNIFESP), 330 Talim St, 12231-280 São José dos Campos, SP, Brazil
| | - R G Ribas
- Technological Institute of Aeronautics (ITA), 50 Mal. Eduardo Gomes Plaza, 12228-900 São José dos Campos, SP, Brazil
| | - S S Amaral
- São Paulo State University (UNESP), Institute of Science and Technology, 777 Eng. Francisco José Longo Avenue, 12245-000 São José dos Campos, SP, Brazil
| | - E F Martins
- Federal University of São Paulo (UNIFESP), 330 Talim St, 12231-280 São José dos Campos, SP, Brazil
| | - E Esposito
- Federal University of São Paulo (UNIFESP), 330 Talim St, 12231-280 São José dos Campos, SP, Brazil
| | - L M R Vasconcellos
- São Paulo State University (UNESP), Institute of Science and Technology, 777 Eng. Francisco José Longo Avenue, 12245-000 São José dos Campos, SP, Brazil
| | - T M B Campos
- Technological Institute of Aeronautics (ITA), 50 Mal. Eduardo Gomes Plaza, 12228-900 São José dos Campos, SP, Brazil
| | - G P Thim
- Technological Institute of Aeronautics (ITA), 50 Mal. Eduardo Gomes Plaza, 12228-900 São José dos Campos, SP, Brazil
| | - E S Trichês
- Federal University of São Paulo (UNIFESP), 330 Talim St, 12231-280 São José dos Campos, SP, Brazil.
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Campos TMB, Ramos NC, Matos JDM, Thim GP, Souza ROA, Bottino MA, Valandro LF, Melo RM. Silica infiltration in partially stabilized zirconia: Effect of hydrothermal aging on mechanical properties. J Mech Behav Biomed Mater 2020; 109:103774. [PMID: 32347214 DOI: 10.1016/j.jmbbm.2020.103774] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Revised: 04/02/2020] [Accepted: 04/05/2020] [Indexed: 12/22/2022]
Abstract
It aimed to evaluate if silica infiltration might influence the hydrothermal degradation of zirconia by determining: the phases formed, hardness, microstructure, and flexural strength of a 3Y-TZP. Yttria partially stabilized zirconia discs (1.2 mm thickness x 13 mm diameter) (InCeram YZ, Vita Zanhfabrik) were produced and assigned into 6 groups, considering 2 factors: silica infiltration in 2 levels (as-sintered or infiltration) and hydrothermal aging (LTD-Low Temperature Degradation) in 3 levels (baseline, aging at 132 °C for 35 h or 140 h). All the groups were subjected to the biaxial flexural test (n = 30), and Vickers hardness (n = 42). Weibull analysis was performed to determine the Weibull moduli (m) and characteristic strenghts (σ0). The specimens were characterized by scanning electron microscopy (SEM) to evaluate microstructure and X-ray diffraction (XRD) for phases percentages determination. For as-sintered condition: there was saturation of the amount of monoclinic zirconia after 35 h of hydrothermal aging, with 66% of monoclinic zirconia formed on the surface. LTD generated a progressive reduction in hardness over time; flexural strength was increased by the 35-h treatment (baseline: 974 MPa; 35 h: 1161.5 MPa), but, the 140 °C treatment was deleterious (698.5 MPa). On the other hand, the infiltrated specimens had an increase in the amount of cubic zirconia on the surface and showed 26% (35h) and 31% (140h) of monoclinic zirconia after the hydrothermal aging ; the strength was kept unaltered after LTD-35 h (935.9 MPa) and an increase was observed after LTD-140 h (1033.6 MPa); the hardness values had no statistically significant changes during the process. Thus, one can concludes that the silica infiltration can prevent the decrease in the mechanical properties due to the LTD on partially stabilized zirconia materials.
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Affiliation(s)
- T M B Campos
- Department of Physics, Aeronautical Technology Institute (ITA), Sao Jose Dos Campos, Sao Paulo, Brazil.
| | - N C Ramos
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology of Sao Jose Dos Campos, Sao Paulo State University (UNESP), Sao Jose Dos Campos, Sao Paulo, Brazil; College of Dentistry, Sao Francisco University (USF), Bragança Paulista, Sao Paulo, Brazil.
| | - J D M Matos
- Department of Dental Materials and Prosthodontics, Institute of Science and Technology of Sao Jose Dos Campos, Sao Paulo State University (UNESP), Sao Jose Dos Campos, Sao Paulo, Brazil.
| | - G P Thim
- Department of Physics, Aeronautical Technology Institute (ITA), Sao Jose Dos Campos, Sao Paulo, Brazil.
| | - R O A Souza
- Department of Prosthodontics, Federal University of Rio Grande Do Norte, Department of Dentistry, Division of Prosthodontics, Natal, Rio Grande do Norte, Brazil.
| | - M A Bottino
- Department of Physics, Aeronautical Technology Institute (ITA), Sao Jose Dos Campos, Sao Paulo, Brazil.
| | - L F Valandro
- Department of Restorative Dentistry, School of Dentistry, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul, Brazil.
| | - R M Melo
- Department of Physics, Aeronautical Technology Institute (ITA), Sao Jose Dos Campos, Sao Paulo, Brazil.
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