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Roriz VM, Santana M, Boaventura VL, Zanotto ED, Peitl O, Dias DR. Efficacy of Biosilicate Glass-ceramic and Fluoride Varnish in the Treatment of Dentin Hypersensitivity-A Randomized Controlled Clinical Trial. Oper Dent 2024:500013. [PMID: 38632860 DOI: 10.2341/23-077-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/12/2023] [Indexed: 04/19/2024]
Abstract
OBJECTIVE The objective of this study was to compare the efficacy of Biosilicate and Duraphat in the treatment of dentin hypersensitivity (DH). METHODS AND MATERIALS This clinical trial was conducted with young adults presenting DH. A visual analogue scale (VAS) was used to assess the level of pain, using volatile and tactile tests. Forty participants presenting two teeth with DH were included, and these teeth were divided into two groups according to the treatment: Biosilicate or Duraphat. Each product was randomly applied on one tooth per participant once a week for 4 weeks and evaluated every 15 days for 60 days after the last application. RESULTS The mean and standard deviation (SD) of VAS values for the initial volatile sensitivity evaluation were 6.18 (1.99) and 6.08 (1.98) for the Biosilicate and Duraphat groups, respectively, and at the fourth week 0.48 (1.5) and 0.83 (1.58). After 60 days, the volatile sensitivity showed the following values: 0.63 (1.19) for Biosilicate and 1.03 (1.07) for Duraphat. The intragroup comparison showed a significant reduction of mean VAS values for DH-related pain assessed by volatile testing for both groups (p<0.001), and the assessment at the 60-day follow-up showed mean values statistically similar to those obtained at the end of treatment. Initial tactile sensitivity observed was 1.48 (2.39) for the Biosilicate and 1.4 (2.2) for the Duraphat group and at the 60-day follow-up 0.23 (0.73) and 0.15 (0.36), respectively, with significant statistical difference (p<0.002). When the reduction in tactile and volatile sensitivities between both groups was compared, no statistically significant difference was observed. CONCLUSION This study indicated that both products were able to promote an important reduction in dentin hypersensitivity with similar results within a 60-day follow-up.
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Affiliation(s)
- V M Roriz
- Virgílio Moreira Roriz, adjunct professor, Periodontology, Dentistry School, Federal University of Goias, Goiania, Goias, Brazil
| | - Mll Santana
- Maria Luiza Lima Santana, MDSc, Federal University of Goias, Goiania, Goias, Brazil
| | - V L Boaventura
- Verônica Lima Boaventura, private clinical practice, Anápolis, Goias, Brazil
| | - E D Zanotto
- Edgar Dutra Zanotto, full professor, Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - O Peitl
- Oscar Peitl Filho, full professor, Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - D R Dias
- *Danilo Rocha Dias, adjunct professor, Department of Restorative Dentistry, Dentistry School, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais- Brazil
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Besegato JF, de Melo PBG, Abreu Bernardi AC, Souza MT, Zanotto ED, Bagnato VS, de Souza Rastelli AN. Using Antimicrobial Photodynamic Therapy with Ultrasound Devices and Bioactive Glasses as a Combined Approach for Treating Dentin Caries Lesions. Pathogens 2023; 12:1052. [PMID: 37624012 PMCID: PMC10459246 DOI: 10.3390/pathogens12081052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/31/2023] [Accepted: 08/08/2023] [Indexed: 08/26/2023] Open
Abstract
Novel approaches for caries lesion removal and treatment have been proposed. This study evaluates the combined use of an experimental ultrasound, aPDT (antimicrobial photodynamic therapy) and bioactive glasses on the removal, decontamination and remineralization of dentin caries lesions. A biological model created with a duo species biofilm (Streptococcus mutans and Lactobacillus acidophilus) was used for the development of a caries-like lesion over the dentin for 7 days. Bovine dentin specimens (4 × 4 × 2 mm) were randomized according to the following caries removal techniques: bur (BUR) or ultrasound (ULT), decontamination (with or without aPDT) and remineralization materials (45S5 or F18 bioactive glasses). The following different groups were investigated: caries lesion (control); sound dentin (control); BUR; BUR + aPDT; ULT; ULT + aPDT; BUR + 45S5, BUR + F18; ULT + 45S5; ULT + F18; BUR + aPDT + 45S5; BUR + aPDT + F18; ULT + aPDT + 45S5; and ULT + aPDT + F18. Transverse microradiography (TMR), cross-sectional microhardness (CSH), FT-Raman spectroscopy and confocal microscopy (CLSM) were performed. A two-way ANOVA and Tukey's test were used (α = 0.05). (3) Results: The TMR revealed a lesion depth of 213.9 ± 49.5 μm and a mineral loss of 4929.3% vol.μm. The CSH increases as a function of depth, regardless of the group (p < 0.05). Removal with BUR (24.40-63.03 KHN) has a greater CSH than ULT (20.01-47.53 KHN; p < 0.05). aPDT did not affect the CSH (p > 0.05). No difference was observed between 45S5 or F18 (p > 0.05), but a change was observed for ULT (p > 0.05). The FT-Raman shows no differences for the phosphate (p > 0.05), but a difference is observed for the carbonate and C-H bonds. The CLSM images show that aPDT effectively inactivates residual bacteria. A combination of ULT, aPDT and bioactive glasses can be a promising minimally invasive treatment.
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Affiliation(s)
- João Felipe Besegato
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University—UNESP, Araraquara 14801-903, SP, Brazil; (J.F.B.); (P.B.G.d.M.)
| | - Priscila Borges Gobbo de Melo
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University—UNESP, Araraquara 14801-903, SP, Brazil; (J.F.B.); (P.B.G.d.M.)
| | | | - Marina Trevelin Souza
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos—UFSCar, São Carlos 13565-905, SP, Brazil; (M.T.S.); (E.D.Z.)
| | - Edgar Dutra Zanotto
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos—UFSCar, São Carlos 13565-905, SP, Brazil; (M.T.S.); (E.D.Z.)
| | - Vanderlei Salvador Bagnato
- Department of Materials Science and Physics, Physics Institute of São Carlos, University of São Paulo—USP, São Carlos 13566-590, SP, Brazil;
| | - Alessandra Nara de Souza Rastelli
- Department of Restorative Dentistry, School of Dentistry, Araraquara, São Paulo State University—UNESP, Araraquara 14801-903, SP, Brazil; (J.F.B.); (P.B.G.d.M.)
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Magalhães GDAP, Thomson JJ, Smoczer C, Young LA, Matos AO, Pacheco RR, Souza MT, Zanotto ED, Puppin Rontani RM. Effect of Biosilicate ® Addition on Physical-Mechanical and Biological Properties of Dental Glass Ionomer Cements. J Funct Biomater 2023; 14:302. [PMID: 37367266 DOI: 10.3390/jfb14060302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/26/2023] [Accepted: 05/27/2023] [Indexed: 06/28/2023] Open
Abstract
This study investigated the influence of incorporating Biosilicate® on the physico-mechanical and biological properties of glass ionomer cement (GIC). This bioactive glass ceramic (23.75% Na2O, 23.75% CaO, 48.5% SiO2, and 4% P2O5) was incorporated by weight (5%, 10%, or 15%) into commercially available GICs (Maxxion R and Fuji IX GP). Surface characterization was made by SEM (n = 3), EDS (n = 3), and FTIR (n = 1). The setting and working (S/W time) times (n = 3) and compressive strength (CS) were analyzed (n = 10) according to ISO 9917-1:2007. The ion release (n = 6) was determined and quantified by ICP OES and by UV-Vis for Ca, Na, Al, Si, P, and F. To verify cell cytotoxicity, stem cells from the apical papilla (SCAP) were exposed to eluates (n = 3, at a ratio of 1.8 cm2/mL) and analyzed 24 h post-exposure. Antimicrobial activity against Streptococcus mutans (ATCC 25175, NCTC 10449) was analyzed by direct contact for 2 h (n = 5). The data were submitted for normality and lognormality testing. One-way ANOVA and Tukey's test were applied for the working and setting time, compressive strength, and ion release data. Data from cytotoxicity and antimicrobial activity were submitted for Kruskal-Wallis' testing and Dunn's post hoc test (α = 0.05). Among all experimental groups, only those with 5% (wt) of Biosilicate® showed better surface quality. Only M5% showed a comparable W/S time to the original material (p = 0.7254 and p = 0.5912). CS was maintained for all Maxxion R groups (p > 0.0001) and declined for Fuji IX experimental groups (p < 0.0001). The Na, Si, P, and F ions released were significantly increased for all Maxxion R and Fuji IX groups (p < 0.0001). Cytotoxicity was increased only for Maxxion R with 5% and 10% of Biosilicate®. A higher inhibition of S. mutans growth was observed for Maxxion R with 5% of Biosilicate® (less than 100 CFU/mL), followed by Maxxion R with 10% of Biosilicate® (p = 0.0053) and Maxxion R without the glass ceramic (p = 0.0093). Maxxion R and Fuji IX presented different behaviors regarding Biosilicate® incorporation. The impacts on physico-mechanical and biological properties were different depending on the GIC, but therapeutic ion release was increased for both materials.
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Affiliation(s)
- Gabriela de Alencar Pinto Magalhães
- Department of Health Sciences and Pediatric Dentistry, Pediatric Division, Piracicaba Dental School, UNICAMP, State University of Campinas, Piracicaba 13414-903, Brazil
| | - Joshua J Thomson
- Division of Integrated Biomedical Sciences, University of Detroit Mercy School of Dentistry, Detroit, MI 48208, USA
| | - Cristine Smoczer
- Division of Integrated Biomedical Sciences, University of Detroit Mercy School of Dentistry, Detroit, MI 48208, USA
| | - Laura Ann Young
- Division of Integrated Biomedical Sciences, University of Detroit Mercy School of Dentistry, Detroit, MI 48208, USA
| | - Adaias O Matos
- Division of Clinical Essentials and Simulation, University of Detroit Mercy School of Dentistry, Detroit, MI 48208, USA
| | - Rafael Rocha Pacheco
- Department of Restorative Sciences, Dental College of Georgia at Augusta University, Augusta, GA 30912, USA
| | - Maria Trevelin Souza
- Vitreous Materials Laboratory, Department of Materials Engineering, Center for Research, Education and Technology in Vitreous Materials (CeRTEV), Federal University of São Carlos (UFSCar), São Carlos 13565-905, Brazil
| | - Edgar Dutra Zanotto
- Vitreous Materials Laboratory, Department of Materials Engineering, Center for Research, Education and Technology in Vitreous Materials (CeRTEV), Federal University of São Carlos (UFSCar), São Carlos 13565-905, Brazil
| | - Regina Maria Puppin Rontani
- Department of Health Sciences and Pediatric Dentistry, Pediatric Division, Piracicaba Dental School, UNICAMP, State University of Campinas, Piracicaba 13414-903, Brazil
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Rifane TO, Cordeiro KEM, Silvestre FA, Souza MT, Zanotto ED, Araújo-Neto VG, Giannini M, Sauro S, de Paula DM, Feitosa VP. Impact of silanization of different bioactive glasses in simplified adhesives on degree of conversion, dentin bonding and collagen remineralization. Dent Mater 2023; 39:217-226. [PMID: 36690502 DOI: 10.1016/j.dental.2023.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 12/29/2022] [Accepted: 01/15/2023] [Indexed: 01/22/2023]
Abstract
OBJECTIVE To analyze simplified adhesive containing pure or silanized bioglass 45S5 (with calcium) or Sr-45S5 (strontium-substituted) fillers applied on dentin and to evaluate the microtensile bond strength (µTBS), interface nanoleakage, degree of conversion of adhesive, collagen degradation and remineralization. METHODS Ambar Universal adhesive (FGM) was doped with 10 wt% bioactive glasses to form following groups: Control (no bioglass), 45S5 (conventional bioglass 45S5), Sr-45S5 (Sr-substituted bioglass 45S5), Sil-45S5 (silanized bioglass 45S5) and Sil-Sr-45S5 (silanized bioglass Sr-45S5). Adhesives were applied after dentin acid-etching using phosphoric acid at extracted human molars. Resin-dentin sticks were obtained and tested for µTBS, nanoleakage at 24 h or 6 months. Degree of conversion was measured using micro-Raman spectroscopy. Dentin remineralization was assessed by FTIR after 6-month storage in PBS. Hydroxyproline (HYP) release was surveyed by UV-Vis spectroscopy. Statistical analysis was performed using ANOVA and Tukey's test (p < 0.05). RESULTS Regarding µTBS, Sr-45S5 and 45S5 presented higher and stable results (p > 0.05). Control (p = 0.018) and Sil-Sr-45S5 (p < 0.001) showed µTBS reduction after 6-month aging. Sil-Sr-45S5 showed higher HYP release than that obtained in the 45S5 group. Sil-45S5 showed mineral deposition and increase in µTBS (p = 0.028) after 6-months. All experimental adhesives exhibited higher degree of conversion compared to Control group, except for 45S5. All adhesives created gap-free interfaces, with very low silver impregnation, except for Sil-Sr-45S5. SIGNIFICANCE The incorporation of silanized 45S5 bioglass into the universal adhesive was advantageous in terms of dentin remineralization, bonding performance and adhesive polymerization. Conversely, Sil-Sr-45S5 compromised the µTBS, interface nanoleakage and had a negative impact on HYP outcomes.
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Affiliation(s)
| | | | | | - Marina Trevelin Souza
- Vitreous Materials Laboratory (LAMAV), Department of Materials Engineering, Federal University of São Carlos, São Carlos, Brazil.
| | - Edgar Dutra Zanotto
- Vitreous Materials Laboratory (LAMAV), Department of Materials Engineering, Federal University of São Carlos, São Carlos, Brazil.
| | - Vitaliano Gomes Araújo-Neto
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
| | - Marcelo Giannini
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.
| | - Salvatore Sauro
- Department of Biomaterials and Minimally Invasive Dentistry, Cardenal Herreara CEU University, Valencia, Spain.
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Dalmolin AC, Acevedo LFA, Campos LA, Dechandt ICJ, Serbena FC, Zanotto ED, Pochapski MT, Arrais CAG, Campagnoli EB, Santos FAD. Effect of bioactive glasses used as dentin desensitizers on the dentin-pulp complex in rats. Dent Mater J 2022; 41:874-881. [PMID: 35934800 DOI: 10.4012/dmj.2022-017] [Citation(s) in RCA: 0] [Impact Index Per Article: 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] [Indexed: 11/23/2022]
Abstract
Bioactive glasses have been recommended for the occlusion of dentinal tubules in treating cervical dentin hypersensitivity. This study evaluates an in vivo model of dentin exposure, and tests the efficacy of bioglass treatments. Thirty male Wistar rats received gingival recession surgery on the upper left first molar. The treatments were applied over the surface of the exposed dentin every 4 days for 28 days. The groups were as follows: Naive; Gingival recession; Cavity varnish; Biosilicate®; Strontium bioglass; and Potassium bioglass. Changes in the dentin-pulp complex, and the presence of substance P, were evaluated through hematoxylin-eosin and immunohistochemical staining. The groups had similar results. Teeth with exposed dentinal tubules in rats showed a typical pattern in the dentin-pulp complex and immunotracing for substance P. The materials did not cause pulp damage. The effects of gingival recession and open dentinal tubules on pulp tissue require further clarification.
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Sabino SDRF, Cordeiro BGB, Silva LD, Pukasiewicz AG, Zanotto ED, Serbena FC. Microstructural and residual stress effects on toughening of stoichiometric BaO.2SiO2 glass-ceramics. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2022.05.073] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Santana MLL, Cesário AI, Dias DR, Zanotto ED, Filho OP, Estrela C, Roriz VM. Efficacy of Biosilicate Glass-Ceramic and Gluma in the Treatment of Cervical Dentin Hypersensitivity: An Interim Results of Randomised Control Trial. J Clin Diagn Res 2022. [DOI: 10.7860/jcdr/2022/52874.16269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Introduction: Dentin Hypersensitivity (DH) is known to be a relatively common condition that affects a considerable portion of the population, and manifests itself in the form of acute pain, due to the exposure of dentin and open dentinal tubules, after the removal of enamel or root cement. It has a multifactorial aetiology. Aim: To compare the efficacy in DH treatment using Biosilicate and Gluma Desensitiser. Materials and Methods: This randomised clinical trial pilot study with a split-mouth design included seven participants. Two teeth presenting Gingival Recession (GR)-related DH were selected in each participant and allocated to treatment groups by simple randomisation. Gluma® desensitiser (GD) and Biosilicate® (BIO) were applied once a week for four weeks. The pain intensity under a volatile stimulus was measured using a Visual Analogue Scale (VAS) at baseline and after treatment, at 15 days and 6 months follow-up. Data analysis were performed by means of descriptive statistics, Paired t-test for inter-group comparison and Friedman test for intra-group comparison (p-value <0.05). Results: The mean age of seven participants were 19.9 years, from which five were women (71.4%). The GD and BIO groups presented initial mean VAS values of 4.86±2.55 and 6.14±1.57, respectively. Fifteen days after treatment, both groups showed a significant improvement (GD group p-value=0.03 and BIO group p-value=0.02, Wilcoxon test) in pain intensity, with 71.4% teeth without sensitivity (VAS=0). Conclusion: Both treatments resulted in a reduction in painful sensitivity under volatile stimuli 15 days after treatment. BIO group presented a better outcome regarding reduction in DH, without recurrence at the 6th month evaluation, when compared to GD group.
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Acevedo LA, Campos LA, Dechandt IC, Alegria G, Siqueira RL, Zanotto ED, Carlos Serbena F, Santos FA. Effect of bioactive glasses containing strontium and potassium on dentin permeability. J Biomed Mater Res B Appl Biomater 2021; 110:517-526. [PMID: 34498810 DOI: 10.1002/jbm.b.34931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 01/13/2021] [Revised: 08/13/2021] [Accepted: 08/22/2021] [Indexed: 11/08/2022]
Abstract
Dentin hypersensitivity (DH) is characterized by pain caused by an external stimulus on exposed dentin. Different therapeutic approaches have been proposed to mitigate this problem; however, none of them provide permanent pain relief. In this study, we synthesized and characterized experimental bioactive glasses containing 3.07 mol% SrO or 3.36 mol% K2 O (both equivalent to 5 wt% in the glass), and evaluated their effect on dentin permeability to verify their potential to treat DH. The experimental materials were characterized by field-emission scanning electron microscopy, Fourier transform infrared spectroscopy, micro-Raman spectroscopy, and X-ray diffraction to confirm the respective structures and chemical compositions. The reduction in the hydraulic conductance of dentin was evaluated at the three stages: minimum permeability; maximum permeability (24% ethylenediaminetetraacetic acid [EDTA] treatment); and final dentin permeability after treatment with the bioactive glasses. They all promoted a reduction in dentin permeability, with a significant difference for each sample and posttreatment group. Also, a significant reduction in dentin permeability was observed even after a simulated toothbrushing test, demonstrating effective action of these materials against DH. Besides, incorporating 3.07 mol% SrO was a positive factor. Therefore, strontium's desensitizing and re-mineralizing properties can be further exploited in bioactive glasses to promote a synergistic effect to treat DH.
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Affiliation(s)
- Luisa Alegria Acevedo
- School of Dentistry, State University of Ponta Grossa, UEPG, Ponta Grossa, PR, Brazil
| | | | | | - Gustavo Alegria
- Department of Dentistry, University of Valle, Santiago de Cali, Valle del Cauca, Colombia
| | - Renato Luiz Siqueira
- Department of Materials Engineering, Federal University of São Carlos, UFSCar, São Carlos, SP, Brazil
| | - Edgar Dutra Zanotto
- Department of Materials Engineering, Federal University of São Carlos, UFSCar, São Carlos, SP, Brazil
| | | | - Fabio André Santos
- School of Dentistry, State University of Ponta Grossa, UEPG, Ponta Grossa, PR, Brazil
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Miotto LN, Villas-Bôas MDOC, Zanotto ED, Ferreira EB, Fais LMG, Pinelli LAP. Surface properties of a new lithium disilicate glass-ceramic after grinding. J Mater Sci Mater Med 2021; 32:110. [PMID: 34453617 PMCID: PMC8403127 DOI: 10.1007/s10856-021-06592-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 06/28/2021] [Indexed: 06/13/2023]
Abstract
This study aimed to evaluate the effect of grinding on some surface properties of two lithium disilicate-based glass-ceramics, one experimental new product denominated LaMaV Press (UFSCar-Brazil) and another commercial known as IPS e-max Press (Ivoclar), in the context of simulated clinical adjustment. Discs (N = 24, 12 mm in diameter) were separated into four groups: LaMaV Press with no grinding (E), LaMaV Press after grinding (EG), IPS e-max Press with no grinding (C), and IPS e-max Press after grinding (CG). A 0.1-mm deep grinding was carried out on EG and CG samples (final thickness of 1.4 mm) using a diamond stone in a low-speed device. The E and C samples had the same thickness. The effect of grinding on the sample surfaces was evaluated by X-ray diffraction, mechanical and optical profilometry, scanning electron microscopy, goniometry, and Vickers hardness. The mean roughness (Ra) was evaluated by Kruskal-Wallis and Student-Newman-Keuls statistics. The surface energy (SE) by the sessile drop method and Vickers hardness (VH) were analyzed using two-way ANOVA. The Ra medians were E = 1.69 µm, EG = 1.57 µm, C = 1.45 µm, and CG = 1.13 µm with p = 0.0284. The SE and VH were similar for all materials and treatments. Grinding smoothed the surfaces and did not significantly alter the hardness and surface energy of both LaMaV Press and IPS e-max Press. These glass-ceramics presented similar surface properties, and clinical adjustments can be implemented without loss of performance of both materials. A grinding standardization device developed that allowed to control the amount of grinding, the speed of rotation speed and the force exerted on the samples.
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Affiliation(s)
- Larissa Natiele Miotto
- Department of Dental Materials and Prosthodontics, School of Dentistry of Araraquara, São Paulo State University (UNESP), Araraquara, SP, Brazil
| | | | - Edgar Dutra Zanotto
- Department of Materials Engineering, Vitreous Materials Laboratory, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - Eduardo Bellini Ferreira
- Department of Materials Engineering, São Carlos School of Engineering, University of São Paulo (USP), São Carlos, SP, Brazil
| | - Laiza Maria Grassi Fais
- Department of Dental Materials and Prosthodontics, School of Dentistry of Araraquara, São Paulo State University (UNESP), Araraquara, SP, Brazil
| | - Lígia Antunes Pereira Pinelli
- Department of Dental Materials and Prosthodontics, School of Dentistry of Araraquara, São Paulo State University (UNESP), Araraquara, SP, Brazil.
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Reis BDO, Prakki A, Stavroullakis AT, Souza MT, Siqueira RL, Zanotto ED, Briso ALF, Tavares Ângelo Cintra L, Henrique Dos Santos P. Analysis of permeability and biological properties of dentin treated with experimental bioactive glasses. J Dent 2021; 111:103719. [PMID: 34118283 DOI: 10.1016/j.jdent.2021.103719] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 05/26/2021] [Accepted: 06/03/2021] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES To evaluate obliterating capability and biological performance of desensitizing agents. METHODS 50 dentin blocks were distributed according to the desensitizing agent used (n = 10): Control (Artificial saliva); Ultra EZ (Ultradent); Desensibilize Nano P (FGM); T5-OH Bioactive Glass (Experimental solution); F18 Bioactive Glass (Experimental solution). Desensitizing treatments were performed for 15 days. In addition, specimens were subjected to acid challenge to simulate oral environment demineralizing conditions. Samples were subjected to permeability analysis before and after desensitizing procedures and acid challenge. Cytotoxicity analysis was performed by using Alamar Blue assay and complemented by total protein quantification by Pierce Bicinchoninic Acid assay at 15 min, 24-h and 48-h time points. Scanning electron microscopy and energy dispersion X-ray spectroscopy were performed for qualitative analysis. Data of dentin permeability was analyzed by two-way repeated measures ANOVA and Tukey's test. For cytotoxicity, Kruskal-Wallis and Newman-Keuls tests. RESULTS for dentin permeability there was no significant difference among desensitizing agents after treatment, but control group presented highest values (0.131 ± 0.076 Lp). After acid challenge, control group maintained highest values (0.044 ± 0.014 Lp) with significant difference to other groups, except for Desensibilize Nano P (0.037 ± 0.019 Lp). For cytotoxicity, there were no significant differences among groups. CONCLUSION Bioglass-based desensitizers caused similar effects to commercially available products, regarding permeability and dentin biological properties. CLINICAL SIGNIFICANCE There is no gold standard protocol for dentin sensitivity. The study of novel desensitizing agents that can obliterate dentinal tubules in a faster-acting and long-lasting way may help meet this clinical need.
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Affiliation(s)
- Bruna de Oliveira Reis
- São Paulo State University (UNESP), School of Dentistry, Department of Preventive and Restorative Dentistry, Araçatuba, São Paulo, Brazil.
| | - Anuradha Prakki
- University of Toronto, Faculty of Dentistry, Department of Restorative Dentistry, Toronto, ON, Canada.
| | | | - Marina Trevelin Souza
- Federal University of São Carlos (UFSCar), Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV), São Carlos, São Paulo, Brazil
| | - Renato Luiz Siqueira
- Federal University of São Carlos (UFSCar), Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV), São Carlos, São Paulo, Brazil
| | - Edgar Dutra Zanotto
- Federal University of São Carlos (UFSCar), Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV), São Carlos, São Paulo, Brazil.
| | - André Luiz Fraga Briso
- São Paulo State University (UNESP), School of Dentistry, Department of Preventive and Restorative Dentistry, Araçatuba, São Paulo, Brazil.
| | - Luciano Tavares Ângelo Cintra
- São Paulo State University (UNESP), School of Dentistry, Department of Preventive and Restorative Dentistry, Araçatuba, São Paulo, Brazil.
| | - Paulo Henrique Dos Santos
- São Paulo State University (UNESP), School of Dentistry, Araçatuba, Department of Dental Materials and Prosthodontics, São Paulo, Brazil.
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Oliveira VDC, Souza MT, Zanotto ED, Watanabe E, Coraça-Huber D. Biofilm Formation and Expression of Virulence Genes of Microorganisms Grown in Contact with a New Bioactive Glass. Pathogens 2020; 9:E927. [PMID: 33182533 PMCID: PMC7696213 DOI: 10.3390/pathogens9110927] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/03/2020] [Accepted: 11/05/2020] [Indexed: 01/09/2023] Open
Abstract
Bioactive glass F18 (BGF18), a glass containing SiO2-Na2O-K2O-MgO-CaO-P2O5, is highly effective as an osseointegration buster agent when applied as a coating in titanium implants. Biocompatibility tests using this biomaterial exhibited positive results; however, its antimicrobial activity is still under investigation. In this study we evaluated biofilm formation and expression of virulence-factor-related genes in Candida albicans, Staphylococcus epidermidis, and Pseudomonas aeruginosa grown on surfaces of titanium and titanium coated with BGF18. C. albicans, S. epidermidis, and P. aeruginosa biofilms were grown on specimens for 8, 24, and 48 h. After each interval, the pH was measured and the colony-forming units were counted for the biofilm recovery rates. In parallel, quantitative real-time polymerase chain reactions were carried out to verify the expression of virulence-factor-related genes. Our results showed that pH changes of the culture in contact with the bioactive glass were merely observed. Reduction in biofilm formation was not observed at any of the studied time. However, changes in the expression level of genes related to virulence factors were observed after 8 and 48 h of culture in BGF18. BGF18 coating did not have a clear inhibitory effect on biofilm growth but promoted the modulation of virulence factors.
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Affiliation(s)
- Viviane de Cássia Oliveira
- Human Exposome and Infectious Diseases Network—HEID, School of Nursing of Ribeirão Preto, University of São Paulo, Bandeirantes Avenue 3900, Ribeirão Preto 14040-904, São Paulo, Brazil; (V.d.C.O.); (E.W.)
- Department of Dental Materials and Prostheses, School of Dentistry of Ribeirão Preto, University of São Paulo, Café Avenue S/N, Ribeirão Preto 14040-904, São Paulo, Brazil
| | - Marina Trevelin Souza
- Vitreous Materials Laboratory—LaMaV, Department of Materials Engineering, Federal University of São Carlos, Rod. Washington Luiz km 235, São Carlos 13565-905, São Paulo, Brazil; (M.T.S.); (E.D.Z.)
| | - Edgar Dutra Zanotto
- Vitreous Materials Laboratory—LaMaV, Department of Materials Engineering, Federal University of São Carlos, Rod. Washington Luiz km 235, São Carlos 13565-905, São Paulo, Brazil; (M.T.S.); (E.D.Z.)
| | - Evandro Watanabe
- Human Exposome and Infectious Diseases Network—HEID, School of Nursing of Ribeirão Preto, University of São Paulo, Bandeirantes Avenue 3900, Ribeirão Preto 14040-904, São Paulo, Brazil; (V.d.C.O.); (E.W.)
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Café Avenue S/N, Ribeirão Preto 14040-904, São Paulo, Brazil
| | - Débora Coraça-Huber
- Department of Orthopedic Surgery, Experimental Orthopedics, Medical University of Innsbruck, Peter‒Mayr-Strasse 4b, 6020 Innsbruck, Austria
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Benetti F, Bueno CRE, Reis-Prado AHD, Souza MT, Goto J, Camargo JMPD, Duarte MAH, Dezan-Júnior E, Zanotto ED, Cintra LTA. Biocompatibility, Biomineralization, and Maturation of Collagen by RTR®, Bioglass and DM Bone® Materials. Braz Dent J 2020; 31:477-484. [PMID: 33146330 DOI: 10.1590/0103-6440202003660] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 08/25/2020] [Indexed: 11/21/2022] Open
Abstract
This study evaluated the biocompatibility, biomineralization, and collagen fiber maturation induced by Resorbable Tissue Replacement (RTR®; β-tricalcium phosphate [TCP]), Bioglass (BIOG; bioactive glass), and DM Bone® (DMB; hydroxyapatite and β-TCP) in vivo. Sixty-four polyethylene tubes with or without (control group; CG) materials (n=8/group/period) were randomly implanted in the subcutaneous tissue of 16 male Wistar rats (four per rat), weighting 250 to 280 g. The rats were killed after 7 and 30 days (n=8), and the specimens were removed for analysis of inflammation using hematoxylin-eosin; biomineralization assay using von Kossa (VK) staining and polarized light (PL); and collagen fiber maturation using picrosirius red (PSR). Nonparametric data were statistically analyzed by Kruskal-Wallis and Dunn tests, and parametric data by one-way ANOVA test (p<0.05). At 7 days, all groups induced moderate inflammation (p>0.05). At 30 days, there was mild inflammation in the BIOG and CG, and moderate inflammation in the RTR and DMB groups, with a significant difference between the CG and RTR (p<0.05). The fibrous capsule was thick at 7 days and predominantly thin at 30 days in all groups. All materials exhibited structures that stained positively for VK and PL. Immature collagen fibers were predominant at 7 and 30 days in all groups (p>0.05), although DMB exhibited more mature fibers than BIOG at 30 days (p<0.05). RTR, BIOG, and DMB were biocompatible, inducing inflammation that reduced over time and biomineralization in the subcutaneous tissue of rats. DMB exhibited more mature collagen fibers than BIOG over a longer period.
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Affiliation(s)
- Francine Benetti
- Department of Restorative Dentistry, School of Dentistry, UFMG - Universidade Federal de Minas Gerais, , Belo Horizonte, MG, Brazil.,Department of Endodontics, School of Dentistry, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
| | | | | | - Marina Trevelin Souza
- Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV) UFSCar - Universidade Federal de São Carlos, SP, Brazil
| | - Juliana Goto
- Department of Endodontics, School of Dentistry, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
| | | | - Marco Antônio Húngaro Duarte
- Department of Dentistry, Endodontics and Dental Materials, School of Dentistry, USP - Universidade de São Paulo, Bauru, SP, Brazil
| | - Elói Dezan-Júnior
- Department of Endodontics, School of Dentistry, UNESP - Universidade Estadual Paulista, Araçatuba, SP, Brazil
| | - Edgar Dutra Zanotto
- Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV) UFSCar - Universidade Federal de São Carlos, SP, Brazil
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13
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Passos TF, Souza MT, Zanotto ED, de Souza CWO. Bactericidal activity and biofilm inhibition of F18 bioactive glass against Staphylococcus aureus. Mater Sci Eng C Mater Biol Appl 2020; 118:111475. [PMID: 33255054 DOI: 10.1016/j.msec.2020.111475] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 08/22/2020] [Accepted: 08/28/2020] [Indexed: 02/06/2023]
Abstract
Antimicrobial treatment failure has been increasing at alarming rates. In this context, the bactericidal properties of biocompatible antimicrobial agents have been widely studied. F18 is a recently developed bioactive glass that presents a much wider working range when compared to other bioactive glasses, a feature that allows it to be used for coating metallic implants, sintering scaffolds or manufacturing fibers for wound healing applications. The aim of this study was to investigate the in vitro bactericidal and anti-biofilm activity of F18 glass as a powder and as a coating on steel samples, and to explore the effects of its dissolution products at concentrations from 3 mg/mL to 50 mg/mL against the Staphylococcus aureus and methicillin-resistant Staphylococcus aureus (MRSA) biofilms. Furthermore, we intend to verify whether changes in the medium pH could influence the bactericidal activity of F18. The results indicated that F18 presented bactericidal activity in preformed S. aureus and MRSA biofilms, reducing more than 6 logs of the viable cells that remained in contact with 50 mg/mL for 24 h. Moreover, an anti-biofilm activity was observed after 12 h of direct contact, with a drop of more than 6 logs of the viable bacterial population. Neutralization of the F18 solution pH decreased its bactericidal efficacy. These results indicate that the F18 glass could be considered as an alternative material for controlling and treating infections by S. aureus.
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Affiliation(s)
- Tathiane Ferroni Passos
- Biotechnology Graduate Program (PPGBiotec-UFSCar), Federal University of São Carlos, SP, Brazil; Microbiology and Parasitology Laboratory (LMP), Department of Morphology and Pathology, Federal University of São Carlos, SP, Brazil.
| | - Marina Trevelin Souza
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos, SP, Brazil
| | - Edgar Dutra Zanotto
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos, SP, Brazil
| | - Clovis Wesley Oliveira de Souza
- Biotechnology Graduate Program (PPGBiotec-UFSCar), Federal University of São Carlos, SP, Brazil; Microbiology and Parasitology Laboratory (LMP), Department of Morphology and Pathology, Federal University of São Carlos, SP, Brazil.
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14
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Carminatti M, Benetti F, Siqueira RL, Zanotto ED, Briso ALF, Chaves-Neto AH, Cintra LTA. Experimental gel containing bioactive glass-ceramic to minimize the pulp damage caused by dental bleaching in rats. J Appl Oral Sci 2020; 28:e20190384. [PMID: 32520077 PMCID: PMC7299561 DOI: 10.1590/1678-7757-2019-0384] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 04/17/2020] [Indexed: 12/26/2022] Open
Abstract
Objectives This study evaluated if the use of a bioactive glass-ceramic-based gel, named Biosilicate (BS), before, after or mixed with bleaching gel, could influence the inflammation of the dental pulp tissue of rats’ molars undergoing dental bleaching with hydrogen peroxide (H2O2). Methodology The upper molars of Wistar rats (Rattus norvegicus, albinus) were divided into Ble: bleached (35% H2O2, 30-min); Ble-BS: bleached and followed by BS-based gel application (20 min); BS-Ble: BS-based gel application and then bleaching; BS/7d-Ble: BS-based gel applications for 7 days and then bleaching; Ble+BS: blend of H2O2 with BS-based gel (1:1, 30-min); and control: placebo gel. After 2 and 30 days (n=10), the rats were euthanized for histological evaluation. The Kruskal-Wallis and Dunn statistical tests were performed (P<0.05). Results At 2 days, the Ble and Ble-BS groups had significant alterations in the pulp tissue, with an area of necrosis. The groups with the application of BS-based gel before H2O2 had moderate inflammation and partial disorganization in the occlusal third of the coronary pulp and were significantly different from the Ble in the middle and cervical thirds (P<0.05). The most favorable results were observed in the Ble+BS, which was similar to the control in all thirds of the coronary pulp (P>0.05). At 30 days, the pulp tissue was organized and the bleached groups presented tertiary dentin deposition. The Ble group had the highest deposition of tertiary dentin, followed by the Ble-BS, and both were different from control (P<0.05). Conclusion A single BS-based gel application beforehand or BS-based gel blended with a bleaching gel minimize the pulp damage induced by dental bleaching.
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Affiliation(s)
- Marina Carminatti
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brazil
| | - Francine Benetti
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brazil.,Universidade Federal de Minas Gerais (UFMG), Faculdade de Odontologia, Departamento de Odontologia Restauradora, Belo Horizonte, MG, Brazil
| | - Renato Luiz Siqueira
- Universidade Federal de São Carlos (UFSCar), Departamento de Engenharia de Materiais, Laboratório de Materiais Vitreos, São Carlos, SP, Brazil
| | - Edgar Dutra Zanotto
- Universidade Federal de São Carlos (UFSCar), Departamento de Engenharia de Materiais, Laboratório de Materiais Vitreos, São Carlos, SP, Brazil
| | - André Luiz Fraga Briso
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brazil
| | - Antônio Hernandes Chaves-Neto
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Ciências Básicas, Araçatuba, SP, Brazil
| | - Luciano Tavares Angelo Cintra
- Universidade Estadual Paulista (UNESP), Faculdade de Odontologia de Araçatuba, Departamento de Odontologia Preventiva e Restauradora, Araçatuba, SP, Brazil
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Parisi JR, Fernandes KR, Aparecida do Vale GC, de França Santana A, de Almeida Cruz M, Fortulan CA, Zanotto ED, Peitl O, Granito RN, Rennó ACM. Marine spongin incorporation into Biosilicate® for tissue engineering applications: An in vivo study. J Biomater Appl 2020; 35:205-214. [PMID: 32362163 DOI: 10.1177/0885328220922161] [Citation(s) in RCA: 4] [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] [Indexed: 12/22/2022]
Abstract
Biomaterials and bone grafts, with the ability of stimulating tissue growth and bone consolidation, have been emerging as very promising strategies to treat bone fractures. Despite its well-known positive effects of biosilicate (BS) on osteogenesis, its use as bone grafts in critical situations such as bone defects of high dimensions or in non-consolidated fractures may not be sufficient to stimulate tissue repair. Consequently, several approaches have been explored to improve the bioactivity of BS. A promising strategy to reach this aim is the inclusion of an organic part, such as collagen, in order to mimic bone structure. Thus, the present study investigated the biological effects of marine spongin (SPG)-enriched BS composites on the process of healing, using a critical experimental model of cranial bone defect in rats. Histopathological and immunohistochemistry analyzes were performed after two and six weeks of implantation to investigate the effects of the material on bone repair (supplemental material-graphical abstract). Histological analysis demonstrated that for both BS and BS/SPG, similar findings were observed, with signs of material degradation, the presence of granulation tissue along the defect area and newly formed bone into the area of the defect. Additionally, histomorphometry showed that the control group presented higher values for Ob.S/BS (%) and for N.Ob/T.Ar (mm2) (six weeks post-surgery) compared to BS/SPG and higher values of N.Ob/T.Ar (mm2) compared to BS (two weeks post-surgery). Moreover, BS showed higher values for OV/TV (%) compared to BS/SPG (six weeks post-surgery). Also, VEGF immunohistochemistry was increased for BS (two weeks post-surgery) and for BS/SPG (six weeks) compared to CG. TGFb immunostaining was higher for BS compared to CG. The results of this study demonstrated that the BS and BS/SPG scaffolds were biocompatible and able to support bone formation in a critical bone defect in rats. Moreover, an increased VEGF immunostaining was observed in BS/SPG.
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Affiliation(s)
- Julia Risso Parisi
- Department of Physiotherapy, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | | | | | - Alan de França Santana
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | | | - Carlos Alberto Fortulan
- Department of Mechanical Engineering, São Carlos School of Engineering São Carlos, SP, Brazil
| | - Edgar Dutra Zanotto
- Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV), Federal University of São Carlos (UFSCar), São Carlos, Brazil
| | - Oscar Peitl
- Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV), Federal University of São Carlos (UFSCar), São Carlos, Brazil
| | - Renata Neves Granito
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
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16
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Ubaldini ALM, Pascotto RC, Sato F, Soares VO, Zanotto ED, Baesso ML. Effects of Bioactive Agents on Dentin Mineralization Kinetics After Dentin Bleaching. Oper Dent 2020; 45:286-296. [DOI: 10.2341/18-272-l] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SUMMARY
Objectives:
This study evaluated effects of Bioglass 45S5 (BG) and Biosilicate (BS) remineralization on the chemical composition and bond strength of control dentin (CD) and bleached dentin (BD) surfaces.
Methods and Materials:
Dentin bleaching treatment was performed using the walking bleaching technique with 0.01 g of sodium perborate and 0.5 mL of 3% hydrogen peroxide for 14 days. Remineralization treatment was carried out by rubbing a remineralization solution (0.015 g of BG or BS diluted in 1.35 mL of distilled water) on the etched dentin surface for 30 seconds. Micro-Raman spectroscopy (MRS) was used to quantitatively analyze the mineral matrix ratios of CD and BD (n=5) after remineralization treatment with BG and BS over 15 days of incubation in artificial saliva. The CD and BD discs (n=10) with and without remineralization treatment with BG and BS were restored using a two-step etch-and-rinse adhesive system (Optibond S, Kerr) and five layers of 1-mm-thick composite resin (Filtek Z250, 3M ESPE). The restored dentin discs were sectioned into nine bonded beams with cross-sectional areas of approximately 0.9 mm2 and tested for microtensile bond strength (μTBS). The dentin surface of one fractured beam per tooth was submitted to MRS to characterize the physicochemical composition (n=10) at the interface. The data were analyzed using one-way analysis of variance and the Tukey-Kramer post hoc test (p<0.005).
Results:
MRS bioactive analyses revealed that both BG and BS promoted increased mineral matrix ratios in the CD and BD. Significantly higher μTBS values were found after CD treatment with BG (CD: 57 MPa±11; CD-BG: 78 MPa±15) and when BG and BS were applied to the BD (BD: 42 MPa±5; BD-BG: 71 MPa±14; BD-BS: 64 MPa±11) (p<0.005). The MRS analysis of the fractured dentin beam showed that the remineralization treatment significantly increased the dentin relative mineral concentration and promoted the appearance of new interface peaks, indicating a chemical interaction (p<0.005).
Conclusion:
Remineralization of BD is an effective therapy to restore damage caused by dentin bleaching and acid conditioning. This approach not only increases dentin mineral compounds but also improves dentin's ability to interact chemically with the adhesive system.
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Affiliation(s)
- ALM Ubaldini
- Adriana Lemos Mori Ubaldini, DDS, PhD, Department of Dentistry, State University of Maringá, Maringá, PR, Brazil
| | - RC Pascotto
- Renata Corrêa Pascotto, DDS, PhD, Department of Dentistry, State University of Maringá, Maringá, PR, Brazil
| | - F Sato
- Francielle Sato, PhD, Department of Physics, State University of Maringá, Maringá, PR, Brazil
| | - VO Soares
- Viviane Oliveira Soares, PhD, Department of Science, State University of Maringá, Goioerê, PR, Brazil
| | - ED Zanotto
- Edgar Dutra Zanotto, PhD, Department of Materials Engineering, Federal University of São Carlos, São Carlos, SP, Brazil
| | - ML Baesso
- Mauro Luciano Baesso, PhD, Department of Physics, State University of Maringá, Maringá, PR, Brazil
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17
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18
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Marques DM, Oliveira VDC, Souza MT, Zanotto ED, Issa JPM, Watanabe E. Biomaterials for orthopedics: anti-biofilm activity of a new bioactive glass coating on titanium implants. Biofouling 2020; 36:234-244. [PMID: 32321306 DOI: 10.1080/08927014.2020.1755842] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 04/02/2020] [Accepted: 04/08/2020] [Indexed: 06/11/2023]
Abstract
This study evaluated adhesion and biofilm formation by Candida albicans, Pseudomonas aeruginosa and Staphylococcus epidermidis on surfaces of titanium (Ti) and titanium coated with F18 Bioactive Glass (BGF18). Biofilms were grown and the areas coated with biofilm were determined after 2, 4 and 8 h. Microscopy techniques were applied in order to visualize the structure of the mature biofilm and the extracellular matrix. On the BGF18 specimens, there was less biofilm formation by C. albicans and S. epidermidis after incubation for 8 h. For P. aeruginosa biofilm, a reduction was observed after incubation for 4 h, and it remained reduced after 8 h on BGF18 specimens. All biofilm matrices seemed to be thicker on BGF18 surface than on titanium surfaces. BGF18 showed significant anti-biofilm activity in comparison with Ti in the initial periods of biofilm formation; however, there was extensive biofilm after incubation for 48 h.
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Affiliation(s)
- Daniella Maia Marques
- Department of General and Specialized Nursing, College of Nursing of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Viviane de Cássia Oliveira
- Department of General and Specialized Nursing, College of Nursing of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
- Department of Dental Materials and Prostheses, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Marina Trevelin Souza
- Vitreous Materials Laboratory, Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - Edgar Dutra Zanotto
- Vitreous Materials Laboratory, Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - João Paulo Mardegan Issa
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Evandro Watanabe
- Department of General and Specialized Nursing, College of Nursing of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
- Department of Restorative Dentistry, Network in Exposome Human and Infectious Diseases, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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19
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Fernandes KR, Parisi JR, Magri AMP, Kido HW, Gabbai-Armelin PR, Fortulan CA, Zanotto ED, Peitl O, Granito RN, Renno ACM. Influence of the incorporation of marine spongin into a Biosilicate®: an in vitro study. J Mater Sci Mater Med 2019; 30:64. [PMID: 31127392 DOI: 10.1007/s10856-019-6266-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 05/10/2019] [Indexed: 06/09/2023]
Abstract
The combination of different biomaterials can be a promising intervention for the composites manufacture, mainly by adding functional and structural characteristics of each material and guarantee the advantages of the use of these composites. In this context, the aim of this study was to develop and evaluated the influence of the incorporation of marine spongin (SPG) into Biosilicate® (BS) in different proportions be used during bone repair. For this purpose, it was to develop and investigate different BS/SPG formulations for physico-chemical and morphological characteristics by pH, loss mass, Fourier transform infrared spectrometer (FTIR) and scanning electron microscope (SEM) analysis. Additionally, the influence of these composites on cell viability, proliferation, and alkaline phosphatase (ALP) activity were investigated. The results revealed that the pH values of all BS groups (with or without SPG) increased over time. A significant mass loss was observed in all composites, mainly with higher SPG percentages. Additionaly, SEM micrographies demonstrated fibers of SPG into BS and material degradation over time. Moreover, FTIR spectral analysis revealed characteristic peaks of PMMA, BS, and SPG in BS/SPG composites. BS/SPG groups demonstrated a positive effect for fibroblast proliferation after 3 and 7 days of culture. Additionally, BS and BS/SPG formulations (at 10% and 20% of SPG) presented similar values of osteoblasts viability and proliferation after 7 days of culture. Furthermore, ALP activity demonstrated no significant difference between BS and BS/SPG scaffolds, at any composition. Based on the present in vitro results, it can be concluded that the incorporation of SPG into BS was possible and produced an improvement in the physical-chemical characteristics and in the biological performance of the graft especially the formulation with 80/20 and 90/10. Future research should focus on in vivo evaluations of this novel composite.
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Affiliation(s)
- K R Fernandes
- Department of Physiotherapy, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil.
| | - J R Parisi
- Department of Physiotherapy, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - A M P Magri
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - H W Kido
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - P R Gabbai-Armelin
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - C A Fortulan
- Department of Mechanical Engineering, São Carlos School of Engineering, São Carlos, SP, Brazil
| | - E D Zanotto
- Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV), Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - O Peitl
- Department of Materials Engineering, Vitreous Materials Laboratory (LaMaV), Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - R N Granito
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - A C M Renno
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
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20
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21
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Pinto KNZ, Tim CR, Crovace MC, Rossi BRO, Kido HW, Parizotto NA, Zanotto ED, Peitl O, Rennó AC. Scaffolds of bioactive glass-ceramic (Biosilicate®) and bone healing: A biological evaluation in an experimental model of tibial bone defect in rats. Biomed Mater Eng 2018; 29:665-683. [PMID: 30400079 DOI: 10.3233/bme-181016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This study aimed to investigate the in vivo tissue response of the Biosilicate® scaffolds in a model of tibial bone defect. Sixty male Wistar rats were distributed into bone defect control group (CG) and Biosilicate® scaffold group (BG). Animals were euthanized 15, 30 and 45 days post-surgery. Stereomicroscopy, scanning electron microscopy, histopathological, immunohistochemistry and biomechanical analysis were used. Scaffolds had a total porosity of 44%, macroporosity of 15% with pore diameter of 230 μm. Higher amount of newly formed bone was observed on days 30 and 45 in BG. Immunohistochemistry analysis showed that the COX-2 expression was significantly higher on days 15 and 30 in BG compared with the CG. RUNX-2 immunoexpression was significantly higher in BG on days 15 and 45. No statistically significant difference was observed in RANKL immunoexpression in all experimental groups. BMP-9 immunoexpression was significantly upregulated in the BG on day 45. Biomechanical analysis showed a decrease in the biomechanical properties of the bone callus on days 30 and 45. The implantation of the Biosilicate® scaffolds was effective in stimulating newly bone formation and produced an increased immunoexpression of markers related to the bone repair.
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Affiliation(s)
| | - Carla Roberta Tim
- Technological and Scientific Institute, Brazil University (UnBr), São Paulo, SP, Brazil.,Department of Bioscience, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - Murilo Camuri Crovace
- Department of Materials Engineering, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | | | - Hueliton Wilian Kido
- Department of Bioscience, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil.,Nove de Julho University (UNINOVE), Bauru, Brazil
| | - Nivaldo Antonio Parizotto
- Technological and Scientific Institute, Brazil University (UnBr), São Paulo, SP, Brazil.,Department of Physiotherapy, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - Edgar Dutra Zanotto
- Department of Materials Engineering, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - Oscar Peitl
- Department of Materials Engineering, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil
| | - Ana Claudia Rennó
- Department of Bioscience, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
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22
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Soares PBF, Moura CCG, Chinaglia CR, Zanotto ED, Zanetta-Barbosa D, Stavropoulos A. Effect of titanium surface functionalization with bioactive glass on osseointegration: An experimental study in dogs. Clin Oral Implants Res 2018; 29:1120-1125. [PMID: 30264907 DOI: 10.1111/clr.13375] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 04/24/2018] [Revised: 09/10/2018] [Accepted: 09/10/2018] [Indexed: 11/29/2022]
Abstract
PURPOSE The purpose of this study was to evaluate the effect of surface functionalization with bioactive glass BSF18 on the osseointegration of sandblasted and dual acid-etched surface (AE) implants. METHODS AND MATERIALS Forty Morse taper implants with an AE surface as controls (C) or with an AE surface functionalized with BSF18 (BF) were placed in the mandibles of 10 beagles. Implants were analyzed after 2 and 4 weeks of healing. Implant stability quotient (ISQ) values were registered immediately after installation and prior to sacrifice. Samples were analyzed for bone-to-implant contact (BIC) and bone density (BD). The characterization of BF implants included surface roughness analysis with atomic force microscopy and contact angle (CA) analysis to evaluate wettability. Data were analyzed using two-way ANOVA followed by Tukey's test (p < 0.05). RESULTS Surface roughness was not affected by BF treatment. CA was lower in the BF group compared to the C group. No significant difference was observed in ISQ values between surfaces (p = 0,231), irrespective of time. Significantly higher ISQ values were observed for both implants after 4 weeks when compared with baseline (p = 0.04). Significantly higher BIC (p = 0.011) and BD (p = 0.025) values were observed for the BF compared to the C group at 2 weeks. Significantly higher BIC (p = 0.030) and BD (p = 0.015) values for the C group were observed at 4 weeks compared to 2 weeks. No significant difference was observed in the BF group between 2 and 4 weeks. CONCLUSIONS Implant functionalization with BSF18 improved the wettability of the implant surface; enhancing BIC and BD at 2 weeks.
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Affiliation(s)
| | | | - Clever Ricardo Chinaglia
- Department of Materials Engineering (DEMa), Federal University of São Carlos, São Carlos, Brazil
| | - Edgar Dutra Zanotto
- Department of Materials Engineering (DEMa), Federal University of São Carlos, São Carlos, Brazil
| | | | - Andreas Stavropoulos
- Department of Periodontology, Faculty of Odontology, Malmö University, Malmö, Sweden
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Tsuchida JE, Ferri FA, Pizani PS, Martins Rodrigues AC, Kundu S, Schneider JF, Zanotto ED. Ionic conductivity and mixed-ion effect in mixed alkali metaphosphate glasses. Phys Chem Chem Phys 2018; 19:6594-6600. [PMID: 28203658 DOI: 10.1039/c6cp07876a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, mixed alkali metaphosphate glasses based on K-Na, Rb-Na, Rb-Li, Cs-Na and Cs-Li combinations were studied by differential scanning calorimetry (DSC), complex impedance spectroscopy, and Raman spectroscopy. DSC analyses show that both the glass transition (Tg) and melting temperatures (Tm) exhibit a clear mixed-ion effect. The ionic conductivity shows a strong mixed-ion effect and decreases by more than six orders of magnitude at room temperature for Rb-Na or Cs-Li alkali pairs. This study confirms that the mixed-ion effect may be explained as a natural consequence of random ion mixing because ion transport is favoured between well-matched energy sites and is impeded due to the structural mismatch between neighbouring sites for dissimilar ions.
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Affiliation(s)
- Jefferson Esquina Tsuchida
- Universidade Federal de Lavras (UFLA), Departamento de Física (DFI), Campus Universitário, Caixa Postal 3037, CEP: 37200-000, Lavras, MG, Brazil.
| | - Fabio Aparecido Ferri
- Departamento de Física (DF), Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil
| | - Paulo Sergio Pizani
- Departamento de Física (DF), Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil and Center for Research, Technology and Education in Vitreous Materials (CeRTEV), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil
| | - Ana Candida Martins Rodrigues
- Center for Research, Technology and Education in Vitreous Materials (CeRTEV), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil and Departamento de Engenharia de Materiais (DEMa) Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil
| | - Swarup Kundu
- Center for Research, Technology and Education in Vitreous Materials (CeRTEV), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil and Departamento de Engenharia de Materiais (DEMa) Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil
| | - José Fabián Schneider
- Center for Research, Technology and Education in Vitreous Materials (CeRTEV), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil and Instituto de Física de São Carlos (IFSC), Universidade de São Paulo (USP), Av. Trabalhador São-Carlense, 400, CEP: 13566-590, São Carlos, SP, Brazil
| | - Edgar Dutra Zanotto
- Center for Research, Technology and Education in Vitreous Materials (CeRTEV), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil and Departamento de Engenharia de Materiais (DEMa) Universidade Federal de São Carlos (UFSCar), Rodovia Washington Luís, Km 235, CEP: 13565-905, São Carlos, SP, Brazil
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Prado Ferraz E, Pereira Freitas G, Camuri Crovace M, Peitl O, Dutra Zanotto E, de Oliveira PT, Mateus Beloti M, Luiz Rosa A. Bioactive-glass ceramic with two crystalline phases (BioS-2P) for bone tissue engineering. ACTA ACUST UNITED AC 2017; 12:045018. [PMID: 28573977 DOI: 10.1088/1748-605x/aa768e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We aimed to evaluate the in vitro osteogenic and osteoinductive potentials of BioS-2P and its ability to promote in vivo bone repair. To investigate osteogenic potential, UMR-106 osteoblastic cells were cultured on BioS-2P and Bioglass 45S5 discs in osteogenic medium. The osteoinductive potential was evaluated using mesenchymal stem cells (MSCs) cultured on BioS-2P, Bioglass 45S5 and polystyrene in non-osteogenic medium. Rat bone calvarial defects were implanted with BioS-2P scaffolds alone or seeded with MSCs. UMR-106 proliferation was similar for both materials, while alkaline phosphatase (ALP) activity and mineralization were higher for BioS-2P. Bone sialoprotein (BSP), RUNX2 and osteopontin (OPN) gene expression and BSP, OPN, ALP and RUNX2 protein expression were higher on BioS-2P. For MSCs, ALP activity was higher on Bioglass 45S5 than on BioS-2P and was lower on polystyrene. All genes were highly expressed on bioactive glasses compared to polystyrene. BioS-2P scaffolds promoted in vivo bone formation without differences in the morphometric parameters at 4, 8 and 12 weeks. After 8 weeks, the combination of BioS-2P with MSCs did not increase the quantity of new bone compared to the BioS-2P alone. To stimulate osteoblast activity, drive MSC differentiation and promote bone formation, BioS-2P is a good choice as a scaffold for bone tissue engineering.
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Affiliation(s)
- Emanuela Prado Ferraz
- Cell Culture Laboratory, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
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25
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Chinelatti MA, Tirapelli C, Corona SAM, Jasinevicius RG, Peitl O, Zanotto ED, Pires-de-Souza FDCP. Effect of a Bioactive Glass Ceramic on the Control of Enamel and Dentin Erosion Lesions. Braz Dent J 2017; 28:489-497. [DOI: 10.1590/0103-6440201601524] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 04/06/2017] [Indexed: 11/21/2022] Open
Abstract
Abstract This study evaluated the effect of a bioactive glass ceramic for the control of erosion and caries lesions. Fragments (n=10) of bovine enamel and root dentin received daily application of different treatments (Biosilicate; Acidulated Phosphate Fluoride- APF; Untreated - control) during the performance of erosive cycles. Surfaces were analyzed with 3D optical profilometry to quantify the superficial loss in four periods (1, 7, 14 and 21 days), as well as the lesion depth with confocal laser scanning microscopy. For caries progression assessment, initial Knoop microhardness was measured on enamel bovine fragments. Initial carious lesions were developed and specimens were divided into three groups (n=10), according to the daily topical application (Biosilicate; APF; no application - control), during the de-remineralization cycles for 14 days. Final microhardness was obtained to calculate the change of surface microhardness. Subsurface demineralization was analyzed using cross-sectional microhardness (depths 10, 30, 50, 70, 90, 110 and 220 µm). Data were tested using ANOVA and Tukey’s test (a=5%). Results of erosive evaluation showed that Biosilicate promoted the lowest (p<0.05) values of surface loss, regardless of time, for both enamel and dentin; APF promoted lower (p<0.05) surface loss than control; analyzing different periods of time, APF did not show difference (p>0.05) between 14 and 21 days of demineralization. Results of enamel caries assessment showed that Biosilicate resulted in higher (p<0.05) surface and subsurface microhardness than both APF and control-applications. It may be concluded that Biosilicate application showed a higher potential to reduce surface loss and development of erosion and caries lesions.
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26
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Pintado-Palomino K, Filho OP, Zanotto ED, Tirapelli C. Corrigendum to “A clinical, randomized, controlled study on the use of desensitizing agents during tooth bleaching” [J. Dent. 43 (9) (2015) 1099–1105]. J Dent 2017; 62:98. [DOI: 10.1016/j.jdent.2017.05.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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27
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Souza MT, Rennó ACM, Peitl O, Zanotto ED. New highly bioactive crystallization-resistant glass for tissue engineering applications. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/2053-1613/aa53b5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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28
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Souza MT, Tansaz S, Zanotto ED, Boccaccini AR. Bioactive Glass Fiber-Reinforced PGS Matrix Composites for Cartilage Regeneration. Materials (Basel) 2017; 10:ma10010083. [PMID: 28772442 PMCID: PMC5344602 DOI: 10.3390/ma10010083] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 01/12/2017] [Accepted: 01/13/2017] [Indexed: 01/25/2023]
Abstract
Poly(glycerol sebacate) (PGS) is an elastomeric polymer which is attracting increasing interest for biomedical applications, including cartilage regeneration. However, its limited mechanical properties and possible negative effects of its degradation byproducts restrict PGS for in vivo application. In this study, a novel PGS–bioactive glass fiber (F18)-reinforced composite was developed and characterized. PGS-based reinforced scaffolds were fabricated via salt leaching and characterized regarding their mechanical properties, degradation, and bioactivity in contact with simulated body fluid. Results indicated that the incorporation of silicate-based bioactive glass fibers could double the composite tensile strength, tailor the polymer degradability, and improve the scaffold bioactivity.
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Affiliation(s)
- Marina Trevelin Souza
- CeRTEV-Center for Research, Technology and Education in Vitreous Materials, Vitreous Material Laboratory, Department of Materials Engineering, Universidade Federal de São Carlos-UFSCar, 13565905 São Carlos, SP, Brazil.
| | - Samira Tansaz
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany.
| | - Edgar Dutra Zanotto
- CeRTEV-Center for Research, Technology and Education in Vitreous Materials, Vitreous Material Laboratory, Department of Materials Engineering, Universidade Federal de São Carlos-UFSCar, 13565905 São Carlos, SP, Brazil.
| | - Aldo R Boccaccini
- Institute of Biomaterials, University of Erlangen-Nuremberg, 91058 Erlangen, Germany.
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29
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30
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Montazerian M, Zanotto ED. Bioactive and inert dental glass-ceramics. J Biomed Mater Res A 2016; 105:619-639. [PMID: 27701809 DOI: 10.1002/jbm.a.35923] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [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: 08/10/2016] [Revised: 09/14/2016] [Accepted: 10/03/2016] [Indexed: 02/07/2023]
Abstract
The global market for dental materials is predicted to exceed 10 billion dollars by 2020. The main drivers for this growth are easing the workflow of dentists and increasing the comfort of patients. Therefore, remarkable research projects have been conducted and are currently underway to develop improved or new dental materials with enhanced properties or that can be processed using advanced technologies, such as CAD/CAM or 3D printing. Among these materials, zirconia, glass or polymer-infiltrated ceramics, and glass-ceramics (GCs) are of great importance. Dental glass-ceramics are highly attractive because they are easy to process and have outstanding esthetics, translucency, low thermal conductivity, high strength, chemical durability, biocompatibility, wear resistance, and hardness similar to that of natural teeth, and, in certain cases, these materials are bioactive. In this review article, we divide dental GCs into the following two groups: restorative and bioactive. Most restorative dental glass-ceramics (RDGCs) are inert and biocompatible and are used in the restoration and reconstruction of teeth. Bioactive dental glass-ceramics (BDGCs) display bone-bonding ability and stimulate positive biological reactions at the material/tissue interface. BDGCs are suggested for dentin hypersensitivity treatment, implant coating, bone regeneration and periodontal therapy. Throughout this paper, we elaborate on the history, processing, properties and applications of RDGCs and BDGCs. We also report on selected papers that address promising types of dental glass-ceramics. Finally, we include trends and guidance on relevant open issues and research possibilities. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 619-639, 2017.
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Affiliation(s)
- Maziar Montazerian
- Department of Materials Engineering (DEMa), Center for Research, Technology and Education in Vitreous Materials (CeRTEV), Federal University of São Carlos (UFSCar), São Carlos, SP, 13.565-905, Brazil
| | - Edgar Dutra Zanotto
- Department of Materials Engineering (DEMa), Center for Research, Technology and Education in Vitreous Materials (CeRTEV), Federal University of São Carlos (UFSCar), São Carlos, SP, 13.565-905, Brazil
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31
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Montazerian M, Dutra Zanotto E. History and trends of bioactive glass-ceramics. J Biomed Mater Res A 2016; 104:1231-49. [DOI: 10.1002/jbm.a.35639] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/27/2015] [Accepted: 12/22/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Maziar Montazerian
- Department of Materials Engineering (DEMa); Center for Research, Technology and Education in Vitreous Materials (CeRTEV), Federal University of São Carlos (UFSCar); São Carlos SP 13.565-905 Brazil
| | - Edgar Dutra Zanotto
- Department of Materials Engineering (DEMa); Center for Research, Technology and Education in Vitreous Materials (CeRTEV), Federal University of São Carlos (UFSCar); São Carlos SP 13.565-905 Brazil
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32
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Gabbai-Armelin PR, Souza MT, Kido HW, Tim CR, Bossini PS, Magri AMP, Fernandes KR, Pastor FAC, Zanotto ED, Parizotto NA, Peitl O, Renno ACM. Effect of a new bioactive fibrous glassy scaffold on bone repair. J Mater Sci Mater Med 2015; 26:177. [PMID: 25893392 DOI: 10.1007/s10856-015-5516-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 03/11/2015] [Indexed: 06/04/2023]
Abstract
Researchers have investigated several therapeutic approaches to treat non-union fractures. Among these, bioactive glasses and glass ceramics have been widely used as grafts. This class of biomaterial has the ability to integrate with living bone. Nevertheless, bioglass and bioactive materials have been used mainly as powder and blocks, compromising the filling of irregular bone defects. Considering this matter, our research group has developed a new bioactive glass composition that can originate malleable fibers, which can offer a more suitable material to be used as bone graft substitutes. Thus, the aim of this study was to assess the morphological structure (via scanning electron microscope) of these fibers upon incubation in phosphate buffered saline (PBS) after 1, 7 and 14 days and, also, evaluate the in vivo tissue response to the new biomaterial using implantation in rat tibial defects. The histopathological, immunohistochemistry and biomechanical analyzes after 15, 30 and 60 days of implantation were performed to investigate the effects of the material on bone repair. The PBS incubation indicated that the fibers of the glassy scaffold degraded over time. The histological analysis revealed a progressive degradation of the material with increasing implantation time and also its substitution by granulation tissue and woven bone. Histomorphometry showed a higher amount of newly formed bone area in the control group (CG) compared to the biomaterial group (BG) 15 days post-surgery. After 30 and 60 days, CG and BG showed a similar amount of newly formed bone. The novel biomaterial enhanced the expression of RUNX-2 and RANK-L, and also improved the mechanical properties of the tibial callus at day 15 after surgery. These results indicated a promising use of the new biomaterial for bone engineering. However, further long-term studies should be carried out to provide additional information concerning the material degradation in the later stages and the bone regeneration induced by the fibrous material.
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Affiliation(s)
- P R Gabbai-Armelin
- Federal University of São Carlos (UFSCar), Rodovia Washington Luís (SP-310), km 235, São Carlos, SP, Brazil,
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33
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Gabbai-Armelin PR, Souza MT, Kido HW, Tim CR, Bossini PS, Fernandes KR, Magri AMP, Parizotto NA, Fernandes KPS, Mesquita-Ferrari RA, Ribeiro DA, Zanotto ED, Peitl O, Renno ACM. Characterization and biocompatibility of a fibrous glassy scaffold. J Tissue Eng Regen Med 2015; 11:1141-1151. [PMID: 25712803 DOI: 10.1002/term.2017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 05/21/2014] [Revised: 12/16/2014] [Accepted: 01/15/2015] [Indexed: 01/22/2023]
Abstract
Bioactive glasses (BGs) are known for their ability to bond to living bone and cartilage. In general, they are readily available in powder and monolithic forms, which are not ideal for the optimal filling of bone defects with irregular shapes. In this context, the development of BG-based scaffolds containing flexible fibres is a relevant approach to improve the performance of BGs. This study is aimed at characterizing a new, highly porous, fibrous glassy scaffold and evaluating its in vitro and in vivo biocompatibility. The developed scaffolds were characterized in terms of porosity, mineralization and morphological features. Additionally, fibroblast and osteoblast cells were seeded in contact with extracts of the scaffolds to assess cell proliferation and genotoxicity after 24, 72 and 144 h. Finally, scaffolds were placed subcutaneously in rats for 15, 30 and 60 days. The scaffolds presented interconnected porous structures, and the precursor bioglass could mineralize a hydroxyapatite (HCA) layer in simulated body fluid (SBF) after only 12 h. The biomaterial elicited increased fibroblast and osteoblast cell proliferation, and no DNA damage was observed. The in vivo experiment showed degradation of the biomaterial over time, with soft tissue ingrowth into the degraded area and the presence of multinucleated giant cells around the implant. At day 60, the scaffolds were almost completely degraded and an organized granulation tissue filled the area. The results highlight the potential of this fibrous, glassy material for bone regeneration, due to its bioactive properties, non-cytotoxicity and biocompatibility. Future investigations should focus on translating these findings to orthotopic applications. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- P R Gabbai-Armelin
- Post-Graduate Programme of Biotechnology, Federal University of São Carlos (UFSCar), SP, Brazil.,Department of Physiotherapy, Federal University of São Carlos (UFSCar), SP, Brazil
| | - M T Souza
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos (UFSCar), SP, Brazil
| | - H W Kido
- Post-Graduate Programme of Biotechnology, Federal University of São Carlos (UFSCar), SP, Brazil.,Department of Physiotherapy, Federal University of São Carlos (UFSCar), SP, Brazil
| | - C R Tim
- Post-Graduate Programme of Biotechnology, Federal University of São Carlos (UFSCar), SP, Brazil.,Department of Physiotherapy, Federal University of São Carlos (UFSCar), SP, Brazil
| | - P S Bossini
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - K R Fernandes
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - A M P Magri
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - N A Parizotto
- Department of Physiotherapy, Federal University of São Carlos (UFSCar), SP, Brazil
| | - K P S Fernandes
- Department of Rehabilitation Sciences and Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | - R A Mesquita-Ferrari
- Department of Rehabilitation Sciences and Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), São Paulo, SP, Brazil
| | - D A Ribeiro
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
| | - E D Zanotto
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos (UFSCar), SP, Brazil
| | - O Peitl
- Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos (UFSCar), SP, Brazil
| | - A C M Renno
- Department of Biosciences, Federal University of São Paulo (UNIFESP), Santos, SP, Brazil
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Kido HW, Tim CR, Bossini PS, Parizotto NA, de Castro CA, Crovace MC, Rodrigues ACM, Zanotto ED, Peitl Filho O, de Freitas Anibal F, Rennó ACM. Porous bioactive scaffolds: characterization and biological performance in a model of tibial bone defect in rats. J Mater Sci Mater Med 2015; 26:74. [PMID: 25631271 DOI: 10.1007/s10856-015-5411-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 11/06/2014] [Indexed: 06/04/2023]
Abstract
The aim of this study was to evaluate the effects of highly porous Biosilicate(®) scaffolds on bone healing in a tibial bone defect model in rats by means of histological evaluation (histopathological and immunohistochemistry analysis) of the bone callus and the systemic inflammatory response (immunoenzymatic assay). Eighty Wistar rats (12 weeks-old, weighing±300 g) were randomly divided into 2 groups (n=10 per experimental group, per time point): control group and Biosilicate® group (BG). Each group was euthanized 3, 7, 14 and 21 days post-surgery. Histological findings revealed a similar inflammatory response in both experimental groups, 3 and 7 days post-surgery. During the experimental periods (3-21 days post-surgery), it was observed that the biomaterial degradation, mainly in the periphery region, provided the development of the newly formed bone into the scaffolds. Immunohistochemistry analysis demonstrated that the Biosilicate® scaffolds stimulated cyclooxygenase-2, vascular endothelial growth factor and runt-related transcription factor 2 expression. Furthermore, in the immunoenzymatic assay, BG presented no difference in the level of tumor necrosis factor alpha in all experimental periods. Still, BG showed a higher level of interleukin 4 after 14 days post-implantation and a lower level of interleukin 10 in 21 days post-surgery. Our results demonstrated that Biosilicate® scaffolds can contribute for bone formation through a suitable architecture and by stimulating the synthesis of markers related to the bone repair.
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Affiliation(s)
- Hueliton Wilian Kido
- Department of Physiotherapy, Post-Graduate Program of Biotechnology, Federal University of São Carlos (UFSCar), São Carlos, SP, Brazil,
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Pinto KNZ, Tim CR, Crovace MC, Matsumoto MA, Parizotto NA, Zanotto ED, Peitl O, Rennó ACM. Effects of Biosilicate® Scaffolds and Low-Level Laser Therapy on the Process of Bone Healing. Photomed Laser Surg 2013; 31:252-60. [DOI: 10.1089/pho.2012.3435] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Affiliation(s)
| | - Carla Roberta Tim
- Department of Physiotherapy, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - Murilo Camuri Crovace
- Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - Mariza Akemi Matsumoto
- Department of Oral Maxillofacial Surgery, School of Dentistry, University of the Sacred Heart, Bauru, São Paulo, Brazil
| | | | - Edgar Dutra Zanotto
- Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
| | - Oscar Peitl
- Department of Materials Engineering, Federal University of São Carlos, São Carlos, São Paulo, Brazil
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Renno ACM, van de Watering FCJ, Nejadnik MR, Crovace MC, Zanotto ED, Wolke JGC, Jansen JA, van den Beucken JJJP. Incorporation of bioactive glass in calcium phosphate cement: An evaluation. Acta Biomater 2013; 9:5728-39. [PMID: 23159565 DOI: 10.1016/j.actbio.2012.11.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 11/01/2012] [Accepted: 11/05/2012] [Indexed: 01/10/2023]
Abstract
Bioactive glasses (BGs) are known for their unique ability to bond to living bone. Consequently, the incorporation of BGs into calcium phosphate cement (CPC) was hypothesized to be a feasible approach to improve the biological performance of CPC. Previously, it has been demonstrated that BGs can successfully be introduced into CPC, with or without poly(d,l-lactic-co-glycolic) acid (PLGA) microparticles. Although an in vitro physicochemical study on the introduction of BG into CPC was encouraging, the biocompatibility and in vivo bone response to these formulations are still unknown. Therefore, the present study aimed to evaluate the in vivo performance of BG supplemented CPC, either pure or supplemented with PLGA microparticles, via both ectopic and orthotopic implantation models in rats. Pre-set scaffolds in four different formulations (1: CPC; 2: CPC/BG; 3: CPC/PLGA; and 4: CPC/PLGA/BG) were implanted subcutaneously and into femoral condyle defects of rats for 2 and 6 weeks. Upon ectopic implantation, incorporation of BG into CPC improved the soft tissue response by improving capsule and interface quality. Additionally, the incorporation of BG into CPC and CPC/PLGA showed 1.8- and 4.7-fold higher degradation and 2.2- and 1.3-fold higher bone formation in a femoral condyle defect in rats compared to pure CPC and CPC/PLGA, respectively. Consequently, these results highlight the potential of BG to be used as an additive to CPC to improve the biological performance for bone regeneration applications. Nevertheless, further confirmation is necessary regarding long-term in vivo studies, which also have to be performed under compromised wound-healing conditions.
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Affiliation(s)
- A C M Renno
- Department of Biomaterials, Radboud University Nijmegen Medical Center, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
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Siqueira RL, Zanotto ED. The influence of phosphorus precursors on the synthesis and bioactivity of SiO2-CaO-P 2O 5 sol-gel glasses and glass-ceramics. J Mater Sci Mater Med 2013; 24:365-379. [PMID: 23114636 DOI: 10.1007/s10856-012-4797-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Accepted: 10/15/2012] [Indexed: 06/01/2023]
Abstract
Bioactive glasses and glass-ceramics of the SiO(2)-CaO-P(2)O(5) system were synthesised by means of a sol-gel method using different phosphorus precursors according to their respective rates of hydrolysis-triethylphosphate (OP(OC(2)H(5))(3)), phosphoric acid (H(3)PO(4)) and a solution prepared by dissolving phosphorus oxide (P(2)O(5)) in ethanol. The resulting materials were characterised by differential scanning calorimetry and thermogravimetry, X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy coupled with energy dispersive X-ray spectroscopy and by in vitro bioactivity tests in acellular simulated body fluid. The different precursors significantly affected the main steps of the synthesis, beginning with the time required for gel formation. The most striking influence of these precursors was observed during the thermal treatments at 700-1,200 °C that were used to convert the gels into glasses and glass-ceramics. The samples exhibited very different mineralisation behaviours; especially those prepared using the phosphoric acid, which had a reduced onset temperature of crystallisation and an increased resistance to devitrification. However, all resulting materials were bioactive. The in vitro bioactivity of these materials was strongly affected by the heat treatment temperature. In general, their bioactivity decreased with increasing treatment temperature. For crystallised samples obtained above 900 °C, the bioactivity was favoured by the presence of two crystalline phases: wollastonite (CaSiO(3)) and tricalcium phosphate (α-Ca(3)(PO(4))(2)).
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Affiliation(s)
- Renato Luiz Siqueira
- Grupo de Pesquisas em Nanotecnologia e Nanomateriais, Centro Federal de Educação Tecnológica de Minas Gerais, Campus Timóteo, Av. Amazonas 1193, Vale Verde, Timóteo, MG, 35183-006, Brazil.
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Nascimento MLF, Fokin VM, Zanotto ED, Abyzov AS. Dynamic processes in a silicate liquid from above melting to below the glass transition. J Chem Phys 2012; 135:194703. [PMID: 22112093 DOI: 10.1063/1.3656696] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We collect and critically analyze extensive literature data, including our own, on three important kinetic processes--viscous flow, crystal nucleation, and growth--in lithium disilicate (Li(2)O·2SiO(2)) over a wide temperature range, from above T(m) to 0.98T(g) where T(g) ≈ 727 K is the calorimetric glass transition temperature and T(m) = 1307 K, which is the melting point. We found that crystal growth mediated by screw dislocations is the most likely growth mechanism in this system. We then calculated the diffusion coefficients controlling crystal growth, D(eff)(U), and completed the analyses by looking at the ionic diffusion coefficients of Li(+1), O(2-), and Si(4+) estimated from experiments and molecular dynamic simulations. These values were then employed to estimate the effective volume diffusion coefficients, D(eff)(V), resulting from their combination within a hypothetical Li(2)Si(2)O(5) "molecule". The similarity of the temperature dependencies of 1/η, where η is shear viscosity, and D(eff)(V) corroborates the validity of the Stokes-Einstein/Eyring equation (SEE) at high temperatures around T(m). Using the equality of D(eff)(V) and D(eff)(η), we estimated the jump distance λ ~ 2.70 Å from the SEE equation and showed that the values of D(eff)(U) have the same temperature dependence but exceed D(eff)(η) by about eightfold. The difference between D(eff)(η) and D(eff)(U) indicates that the former determines the process of mass transport in the bulk whereas the latter relates to the mobility of the structural units on the crystal/liquid interface. We then employed the values of η(T) reduced by eightfold to calculate the growth rates U(T). The resultant U(T) curve is consistent with experimental data until the temperature decreases to a decoupling temperature T(d)(U) ≈ 1.1-1.2T(g), when D(eff)(η) begins decrease with decreasing temperature faster than D(eff)(U). A similar decoupling occurs between D(eff)(η) and D(eff)(τ) (estimated from nucleation time-lags) but at a lower temperatureT(d)(τ) ≈ T(g). For T > T(g) the values of D(eff)(τ) exceed D(eff)(η) only by twofold. The different behaviors of D(eff)(τ)(T) and D(eff)(U)(T) are likely caused by differences in the mechanisms of critical nuclei formation. Therefore, we have shown that at low undercoolings, viscosity data can be employed for quantitative analyses of crystal growth rates, but in the deeply supercooled liquid state, mass transport for crystal nucleation and growth are not controlled by viscosity. The origin of decoupling is assigned to spatially dynamic heterogeneity in glass-forming melts.
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Affiliation(s)
- Marcio Luis Ferreira Nascimento
- Institute of Humanities, Arts & Sciences, Federal University of Bahia, Rua Barão de Jeremoabo s∕n, Glauber Rocha Pavilion (PAF 3), Ondina University Campus, 40170-115 Salvador-BA, Brazil
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Martins CHG, Carvalho TC, Souza MGM, Ravagnani C, Peitl O, Zanotto ED, Panzeri H, Casemiro LA. Assessment of antimicrobial effect of Biosilicate® against anaerobic, microaerophilic and facultative anaerobic microorganisms. J Mater Sci Mater Med 2011; 22:1439-1446. [PMID: 21556979 DOI: 10.1007/s10856-011-4330-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Accepted: 04/27/2011] [Indexed: 05/30/2023]
Abstract
This study assessed the antimicrobial activity of a new bioactive glass-ceramic (Biosilicate®) against anaerobic, microaerophilic, and facultative anaerobic microorganisms. Evaluation of the antimicrobial activity was carried out by three methods, namely agar diffusion, direct contact, and minimal inhibitory concentration (MIC). For the agar diffusion technique, bio glass-ceramic activity was observed against various microorganisms, with inhibition haloes ranging from 9.0 ± 1.0 to 22.3 ± 2.1 mm. For the direct contact technique, Biosilicate® displayed activity against all the microorganisms, except for S. aureus. In the first 10 min of contact between the microorganisms and Biosilicate®, there was a drastic reduction in the number of viable cells. Confirming the latter results, MIC showed that the Biosilicate® inhibited the growth of microorganisms, with variations between ≤ 2.5 and 20 mg/ml. The lowest MIC values (7.5 to ≤ 2.5 mg/ml) were obtained for oral microorganisms. In conclusion, Biosilicate® exhibits a wide spectrum of antimicrobial properties, including anaerobic bacteria.
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Tirapelli C, Panzeri H, Soares RG, Peitl O, Zanotto ED. A novel bioactive glass-ceramic for treating dentin hypersensitivity. Braz Oral Res 2010; 24:381-7. [DOI: 10.1590/s1806-83242010000400002] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Accepted: 08/07/2010] [Indexed: 01/13/2023] Open
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Nascimento MLF, Dutra Zanotto E. Does viscosity describe the kinetic barrier for crystal growth from the liquidus to the glass transition? J Chem Phys 2010; 133:174701. [DOI: 10.1063/1.3490793] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bossini PS, Muniz Rennó AC, Ribeiro DA, Fangel R, Peitl O, Zanotto ED, Parizotto NA. Biosilicate® and low-level laser therapy improve bone repair in osteoporotic rats. J Tissue Eng Regen Med 2010; 5:229-37. [DOI: 10.1002/term.309] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2010] [Accepted: 04/14/2010] [Indexed: 11/07/2022]
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Renno ACM, McDonnell PA, Crovace MC, Zanotto ED, Laakso L. Effect of 830 nm laser phototherapy on osteoblasts grown in vitro on Biosilicate scaffolds. Photomed Laser Surg 2010; 28:131-3. [PMID: 19814702 DOI: 10.1089/pho.2009.2487] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVE The purpose of this study was (i) to develop a method for successfully seeding osteoblasts onto a glass-ceramic scaffold designed for use in clinical settings, and (ii) to determine whether the application of laser phototherapy at 830 nm would result in osteoblast proliferation on the glass-ceramic scaffold. BACKGROUND The use of bioscaffolds is considered a promising strategy for a number of clinical applications where tissue healing is sub-optimal. As in vitro osteoblast growth is a slow process, laser phototherapy could be used to stimulate osteoblast proliferation on bioscaffolds. METHODS A methodology was developed to seed an osteoblastic (MC3T3) cell line onto a novel glass-ceramic scaffold. Seeded scaffolds were irradiated with a single exposure of 830 nm laser at 10 J/cm(2) (at diode). Non-irradiated seeded scaffolds acted as negative controls. Cell proliferation was assessed seven days after irradiation. RESULTS Osteoblastic MC3T3 cells were successfully grown on discs composed of a glass-ceramic composite. Laser irradiation produced a 13% decrease in MC3T3 cell proliferation on glass-ceramic discs (mean +/- SD = 0.192 +/- 0.002) compared with control (non-irradiated) discs (mean +/-SD = 0.22 +/- 0.002). CONCLUSIONS Despite successful seeding of bioscaffolds with osteoblasts, laser phototherapy resulted in a reduction in cell growth compared to non-irradiated controls. Future research combining laser phototherapy and glass-ceramic scaffolds should take into account possible interactions of the laser with matrix compounds.
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Moura J, Teixeira LN, Ravagnani C, Peitl O, Zanotto ED, Beloti MM, Panzeri H, Rosa AL, de Oliveira PT. In vitro osteogenesis on a highly bioactive glass-ceramic (Biosilicate®). J Biomed Mater Res A 2007; 82:545-57. [PMID: 17311315 DOI: 10.1002/jbm.a.31165] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
One of the strategies to improve the mechanical performance of bioactive glasses for load-bearing implant devices has been the development of glass-ceramic materials. The present study aimed to evaluate the effect of a highly bioactive, fully-crystallized glass-ceramic (Biosilicate) of the system P(2)O(5)-Na(2)O-CaO-SiO(2) on various key parameters of in vitro osteogenesis. Surface characterization was carried out by scanning electron microscopy and Fourier transform infrared spectroscopy. Osteogenic cells were obtained by enzymatic digestion of newborn rat calvarial bone and by growing on Biosilicate discs and on control bioactive glass surfaces (Biosilicate) parent glass and Bioglass(R) 45S5) for periods of up to 17 days. All materials developed an apatite layer in simulated body fluid for 24h. Additionally, as early as 12 h under culture conditions and in the absence of cells, all surfaces developed a layer of silica-gel that was gradually covered by amorphous calcium phosphate deposits, which remained amorphous up to 72 h. During the proliferative phase of osteogenic cultures, the majority of cells exhibited disassembly of the actin cytoskeleton, whereas reassembly of actin stress fibers took place only in areas of cell multilayering by day 5. Although no significant differences were detected in terms of total protein content and alkaline phosphatase activity at days 11 and 17, Biosilicate supported significantly larger areas of calcified matrix at day 17. The results indicate that full crystallization of bioactive glasses in a range of compositions of the system P(2)O(5)-Na(2)O-CaO-SiO(2) may promote enhancement of in vitro bone-like tissue formation in an osteogenic cell culture system.
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Affiliation(s)
- João Moura
- Cell Culture Laboratory, Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café, s/n, CEP 14040-904, Ribeirão Preto, São Paulo, Brazil
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Abstract
Extensive data on the viscosity, covering 15 orders of magnitude, and crystal growth rate, covering seven orders of magnitude, of liquid diopside (CaO.MgO.2SiO(2)) were collected in a wide range of undercoolings from 1.10T(g) to 0.99T(m) (T(g) is the glass transition temperature and T(m) the melting point). The raw growth rate data were corrected for the increased interfacial temperature produced by the heat released during crystallization. A detailed analysis confirms that growth mediated by screw dislocations reasonably explain the experimental data in these wide ranges of temperatures and growth rates. Effective diffusion coefficients were calculated from crystal growth rates and from viscosity, and were then compared with measured self-diffusion coefficients of silicon and oxygen in diopside melt. The results show that oxygen and silicon control the diffusion dynamics involved in crystal growth and viscous flow. This study not only unveils the transport mechanism in this complex liquid, but also validates the use of viscosity (through the Stokes-Einstein or the Eyring equations) to account for the kinetic term of the crystal growth expression in a wide range of temperatures.
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Affiliation(s)
- Marcio Luis Ferreira Nascimento
- Vitreous Materials Laboratory, Department of Materials Engineering, Federal University of São Carlos, 13.565-905, São Carlos-São Paulo, Brazil
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