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Thonai S, Kataki R, Das L, Begum F, Deka A, Borah DK. Comparative evaluation of calcium ion release, pH change, and dentinal tubule penetration of four different formulations of calcium hydroxide-based intracanal medicaments - An in vitro study. JOURNAL OF CONSERVATIVE DENTISTRY AND ENDODONTICS 2023; 26:657-662. [PMID: 38292750 PMCID: PMC10823981 DOI: 10.4103/jcde.jcde_39_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/10/2023] [Accepted: 09/18/2023] [Indexed: 02/01/2024]
Abstract
Aim The aim of the study was to evaluate and compare the release of calcium ion, pH change, and dentinal penetration depth of four different formulations of calcium hydroxide-based intracanal medicaments. Materials and Methods Eighty mandibular single-rooted premolar teeth were divided into four groups (n = 20): Group 1 - calcium hydroxide (CH) + distilled water (DW), Group 2 - nanocalcium hydroxide + DW, Group 3 - calcium hydroxide + chitosan, and Group 4 - calcium hydroxide + 2% chlorhexidine gluconate. Biomechanical preparation was done till the F2 rotary ProTaper system and intracanal medicaments were placed. Calcium ions and pH were assessed at 24 h, 7 days, 15 days, and 30 days using an ultraviolet spectrophotometer and pH meter, respectively. The evaluation of tubule penetration was scanned under a field emission scanning electron microscope. Results A significant difference was seen in calcium ion release and pH change among the four groups at 24 h, 7 days, 15 days, and 30 days as well as depth of dentinal penetration. Conclusion Calcium hydroxide mixed with 2% chlorhexidine gel showed alkaline pH and the highest calcium ion release as well as significant dentinal tubule penetration among all the four groups under observation. Both combinations can enhance antimicrobial effectiveness as intracanal medicaments. Further clinical study should be carried out to optimize its use as an alternative treatment modality.
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Affiliation(s)
- Salouno Thonai
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - Rubi Kataki
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - Lima Das
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - Firdushi Begum
- Department of Biochemistry, Guwahati Medical College and Hospital, Guwahati, Assam, India
| | - Adrija Deka
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
| | - Diganta Kumar Borah
- Department of Conservative Dentistry and Endodontics, Regional Dental College, Guwahati, Assam, India
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Sy K, Chevalier C, Maton M, Mokbel I, Mahieux S, Houcke I, Neut C, Grosgogeat B, Deveaux E, Gritsch K, Agossa K. Therapeutic Potential of Chlorhexidine-Loaded Calcium Hydroxide-Based Intracanal Medications in Endo-Periodontal Lesions: An Ex Vivo and In Vitro Study. Antibiotics (Basel) 2023; 12:1416. [PMID: 37760713 PMCID: PMC10525524 DOI: 10.3390/antibiotics12091416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/21/2023] [Accepted: 08/31/2023] [Indexed: 09/29/2023] Open
Abstract
Endo-periodontal lesions are challenging clinical situations where both the supporting tissues and the root canal of the same tooth are infected. In the present study, chlorhexidine (CHX)-loaded calcium hydroxide (CH) pastes were used as intracanal medications (ICMs). They were prepared and tested on pathogens found in both the root canal and the periodontal pocket. Exposure to 0.5% and 1% CHX-loaded ICMs decreased the growth of Porphyromonas gingivalis and was effective in eradicating or inhibiting an Enterococcus faecalis biofilm. CH was injected into the root canal of extracted human teeth immersed in deionized water. CHX-loaded ICMs resulted in the transradicular diffusion of active components outside the tooth through the apex and the lateral dentinal tubules, as shown by the release of CHX (from 3.99 µg/mL to 51.28 µg/mL) and changes in pH (from 6.63 to 8.18) and calcium concentrations (from 2.42 ppm to 14.67 ppm) after 7 days. The 0.5% CHX-loaded ICM was non-toxic and reduced the release of IL-6 by periodontal cells stimulated by P. gingivalis lipopolysaccharides. Results indicate that the root canal may serve as a reservoir for periodontal drug delivery and that CHX-based ICMs can be an adjuvant for the control of infections and inflammation in endo-periodontal lesions.
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Affiliation(s)
- Kadiatou Sy
- U1008, Controlled Drug Delivery Systems and Biomaterials, Inserm, CHU Lille, Université de Lille, 59000 Lille, France; (M.M.); (E.D.); (K.A.)
- Faculté d’Odontologie, Hospices Civils de Lyon, Pôle d′Odontologie, Université Lyon 1, Université de Lyon, 69372 Lyon Cedex 08, France; (B.G.); (K.G.)
| | - Charlène Chevalier
- UMR CNRS 5615 Laboratoire des Multimatériaux et Interfaces, Université Lyon 1, 69100 Villeurbanne, France; (C.C.); (I.M.)
| | - Mickaël Maton
- U1008, Controlled Drug Delivery Systems and Biomaterials, Inserm, CHU Lille, Université de Lille, 59000 Lille, France; (M.M.); (E.D.); (K.A.)
| | - Ilham Mokbel
- UMR CNRS 5615 Laboratoire des Multimatériaux et Interfaces, Université Lyon 1, 69100 Villeurbanne, France; (C.C.); (I.M.)
| | - Séverine Mahieux
- U1286 Infinite, Institute for Translational Research in Inflammation, Inserm, CHU Lille, Université de Lille, 59000 Lille, France; (S.M.); (I.H.); (C.N.)
| | - Isabelle Houcke
- U1286 Infinite, Institute for Translational Research in Inflammation, Inserm, CHU Lille, Université de Lille, 59000 Lille, France; (S.M.); (I.H.); (C.N.)
| | - Christel Neut
- U1286 Infinite, Institute for Translational Research in Inflammation, Inserm, CHU Lille, Université de Lille, 59000 Lille, France; (S.M.); (I.H.); (C.N.)
| | - Brigitte Grosgogeat
- Faculté d’Odontologie, Hospices Civils de Lyon, Pôle d′Odontologie, Université Lyon 1, Université de Lyon, 69372 Lyon Cedex 08, France; (B.G.); (K.G.)
| | - Etienne Deveaux
- U1008, Controlled Drug Delivery Systems and Biomaterials, Inserm, CHU Lille, Université de Lille, 59000 Lille, France; (M.M.); (E.D.); (K.A.)
| | - Kerstin Gritsch
- Faculté d’Odontologie, Hospices Civils de Lyon, Pôle d′Odontologie, Université Lyon 1, Université de Lyon, 69372 Lyon Cedex 08, France; (B.G.); (K.G.)
| | - Kevimy Agossa
- U1008, Controlled Drug Delivery Systems and Biomaterials, Inserm, CHU Lille, Université de Lille, 59000 Lille, France; (M.M.); (E.D.); (K.A.)
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Ribeiro MRG, Guilherme HG, Braga AN, Abreu AG, Pereira ÉM, Rodrigues V, Bauer J, de Fátima Carvalho Souza S. Physicochemical and histological analysis of an experimental endodontic repair material containing 45S5 bioactive glass. Biotechnol Lett 2023:10.1007/s10529-023-03391-x. [PMID: 37148343 DOI: 10.1007/s10529-023-03391-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/26/2023] [Accepted: 04/27/2023] [Indexed: 05/08/2023]
Abstract
This study aimed to evaluate the maximum compressive strength, the modulus of elasticity, pH variation, ionic release, radiopacity and biological response of an experimental endodontic repair cement based on 45S5 Bioglass®. An in vitro and in vivo study with an experimental endodontic repair cement containing 45S5 bioactive glass was conducted. There were three endodontic repair cement groups: 45S5 bioactive glass-based (BioG), zinc oxide-based (ZnO), and mineral trioxide aggregate (MTA). In vitro tests were used to evaluate their physicochemical properties: compressive strength, modulus of elasticity, radiopacity, pH variation, and the ionic release of Ca+ and PO4. An animal model was used to evaluate the bone tissue response to endodontic repair cement. Statistical analysis included the unpaired t-test, one-way ANOVA and Tukey's test. BioG showed the lowest compressive strength and ZnO showed the highest radiopacity among the groups, respectively (p < 0.05). There were no significant differences in the modulus of elasticity among the groups. BioG and MTA maintained an alkaline pH during the 7 days of evaluation, both at pH 4 and in a pH 7 buffered solutions. PO4 was elevated in BioG, peaking at 7 days (p < 0.05). Histological analysis showed less intense inflammatory reactions and new bone formation in MTA. BioG showed inflammatory reactions that decreased over time. These findings suggest that the BioG experimental cement had good physicochemical characteristics and biocompatibility required for bioactive endodontic repair cement.
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Affiliation(s)
- Michael Ranniery Garcia Ribeiro
- School of Dentistry, CEUMA University, Imperatriz, Brazil
- Dentistry Graduate Program, Federal University of Maranhão, Avenida dos Portugueses, 1966, Campus Universitário do Bacanga, São Luís, MA, 65085-580, Brazil
| | | | - Alina Neres Braga
- School of Dentistry, Federal University of Maranhão, São Luís, Brazil
| | - Afonso Gomes Abreu
- Graduate Program in Microbial Biology, CEUMA University, São Luis, Brazil
| | | | - Vandilson Rodrigues
- Dentistry Graduate Program, Federal University of Maranhão, Avenida dos Portugueses, 1966, Campus Universitário do Bacanga, São Luís, MA, 65085-580, Brazil.
| | - José Bauer
- Dentistry Graduate Program, Federal University of Maranhão, Avenida dos Portugueses, 1966, Campus Universitário do Bacanga, São Luís, MA, 65085-580, Brazil
| | - Soraia de Fátima Carvalho Souza
- Dentistry Graduate Program, Federal University of Maranhão, Avenida dos Portugueses, 1966, Campus Universitário do Bacanga, São Luís, MA, 65085-580, Brazil
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Matsuzaki E, Hirose H, Matsumoto K, Matsumoto N, Fujimasa S, Hatakeyama J, Anan H. Effects of root-end filling materials on vascular endothelial cell proliferation and tube formation. J Dent Sci 2022; 17:1232-1237. [PMID: 35784111 PMCID: PMC9236890 DOI: 10.1016/j.jds.2021.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/04/2021] [Indexed: 11/25/2022] Open
Abstract
Background/purpose Regarding root-end filling materials in apical surgery, sealing ability and biocompatibility are useful for treatment. Angiogenesis, which occurs in the process of periapical wound healing, is closely related to bone formation. In this study, we investigated the effects of root-end filling materials on vascular endothelial cell proliferation and angiogenesis. Materials and methods Mineral trioxide aggregate (MTA), 4-methacryloxyethyl trimellitate anhydride/methyl methacrylate-tri-n-butyl borane (4-META/MMA-TBB) resin, Super EBA, and CS-BG-multi, bioactive glass-related materials, were used. After curing, each material was soaked in a medium for 1 or 7 days, and then cultured for 1-7 days to investigate the effects on human umbilical vein endothelial cell (HUVEC) proliferation, angiogenesis, and vascular endothelial growth factor receptors (VEGFRs) mRNA expression. Results In the 1-day soaked sample, there was significantly less proliferation in MTA and Super EBA on day 7 of culture. In the 7-day soaked sample, there was significantly less proliferation in Super EBA and CS-BG-multi on day 7 of culture. Tube formation was significantly high in MTA in both the 1-day and 7-day soaked samples, significantly high in SB in the 1-day soaked sample, and significantly low in Super EBA in both the 1-day and 7-day soaked samples. CS-BG-multi was comparable to the control. VEGFR-1 and VEGFR-2 mRNA expressions showed an upward trend in MTA, and a trend similar to the control in SB. Conclusion MTA and 4-META/MMA-TBB resin had a higher pro-angiogenic effect while Super EBA had a less pro-angiogenic effect. CS-BG-multi had low toxicity on tube formation of HUVEC.
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Affiliation(s)
- Etsuko Matsuzaki
- Section of Operative Dentistry and Endodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
- Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan
| | - Haruna Hirose
- Section of Operative Dentistry and Endodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Kazuma Matsumoto
- Section of Operative Dentistry and Endodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Noriyoshi Matsumoto
- Section of Operative Dentistry and Endodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Seishiro Fujimasa
- Section of Operative Dentistry and Endodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
| | - Junko Hatakeyama
- Section of General Dentistry, Department of General Dentistry, Fukuoka Dental College, Fukuoka, Japan
| | - Hisashi Anan
- Section of Operative Dentistry and Endodontology, Department of Odontology, Fukuoka Dental College, Fukuoka, Japan
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de Freitas SAA, Ferreira PVC, Carvalho EM, Aldaz MAN, Loguercio AD, Grazziotin-Soares R, Carvalho CN, Pereira ADFV, Bauer J. Experimental pastes containing niobophosphate and 45S5 bioactive glasses for treatment of dentin hypersensitivity: dentin permeability and tubule obliteration. Clin Oral Investig 2022; 26:6397-6407. [PMID: 35767044 DOI: 10.1007/s00784-022-04595-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 06/21/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES This study tested the ability of bioactive pastes containing niobophosphate and 45S5 glasses to reduce dentin permeability and to obliterate dentinal tubules, as a mean of reducing human dentin hypersensitivity. MATERIALS AND METHODS Experimental pastes with concentrations of 10, 20, and 30 wt% of two bioactive glasses (45S5 or niobophosphate [NbG]) were formulated. A paste without bioactive glass (placebo) and a commercial paste (Nano P, FGM) were used as controls. Forty dentin disc specimens were obtained from caries-free extracted third human molars and divided in 8 groups (n = 5). Percentage of permeability (%Lp) was assessed in a dental permeability machine considering hydraulic conductance, immediately after pastes application and at day 7, day 14, and day 21. The precipitates formed on the surface of the dentin discs (and dentinal tubules) were analyzed by SEM/EDS and micro-Raman spectra. Data of dentin permeability (%) 2-way repeated-measures (ANOVA) and Holm-Sidak post-tests (α = 0.05). Dentinal tubule obliteration was visually (and elemental) evaluated and descriptively reported. RESULTS The experimental bioactive glass pastes containing NbG and 45S5, regardless of the concentration, reduced dentin permeability in comparison with pastes without bioactive glasses (P < 0.05). The formulated placebo and commercial paste did not reduce permeability over time (P < 0.05). SEM/EDS and micro-Raman analyses showed that both type of bioactive pastes (NbG or 45S5-based) presented mineral precipitates obliterating the dentinal tubules at day 21. NbG seems to offer a better initial effect than 45S5, while at 21 days there is no difference between both glasses. CONCLUSION Experimental bioactive pastes containing NbG and 45S5 (at concentrations of 10%, 20%, or 30%) have potential to reduce dentin permeability (over time) in comparison with pastes without bioactive glasses; and this occurs on behalf of obliteration of dentinal tubules by microparticle and precipitate formation. CLINICAL RELEVANCE Bioactive pastes containing NbG and 45S5 may benefit patients presenting dentin hypersensitivity, because these pastes can start acting fast after application and maintain their action up to 21 days.
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Affiliation(s)
- Samantha Ariadne Alves de Freitas
- Dentistry Biomaterials Laboratory (Biomma), School of Dentistry, Federal University of Maranhão (UFMA), Av. dos Portugueses, 1966, São Luís, Maranhão, 65080-805, Brazil
| | - Paulo Vitor Campos Ferreira
- Department of Restorative Dentistry, Dental Materials Division, School of Dentistry, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba, São Paulo, 13414-903, Brazil
| | - Edilausson Moreno Carvalho
- University Ceuma (UNICEUMA), School of Dentistry, R. Josué Montello, 1, Renascença II, São Luis, , MA, 65075-120, Brazil
| | - Mayra Alejandra Nuñez Aldaz
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa (UEPG), Rua Carlos Cavalcanti, 4748, Campus Uvaranas, Ponta GrossaParaná, 84030-900, Brazil
| | - Alessandro Dourado Loguercio
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa (UEPG), Rua Carlos Cavalcanti, 4748, Campus Uvaranas, Ponta GrossaParaná, 84030-900, Brazil
| | - Renata Grazziotin-Soares
- College of Dentistry, University of Saskatchewan, 105 Wiggins Road, Saskatoon, Saskatchewan, S7N 5E4, Canada
| | - Ceci Nunes Carvalho
- University Ceuma (UNICEUMA), School of Dentistry, R. Josué Montello, 1, Renascença II, São Luis, , MA, 65075-120, Brazil
| | - Adriana de Fátima Vasconcelos Pereira
- Dentistry Biomaterials Laboratory (Biomma), School of Dentistry, Federal University of Maranhão (UFMA), Av. dos Portugueses, 1966, São Luís, Maranhão, 65080-805, Brazil
| | - José Bauer
- Dentistry Biomaterials Laboratory (Biomma), School of Dentistry, Federal University of Maranhão (UFMA), Av. dos Portugueses, 1966, São Luís, Maranhão, 65080-805, Brazil.
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Stuart B, Stan G, Popa A, Carrington M, Zgura I, Necsulescu M, Grant D. New solutions for combatting implant bacterial infection based on silver nano-dispersed and gallium incorporated phosphate bioactive glass sputtered films: A preliminary study. Bioact Mater 2022; 8:325-340. [PMID: 34541404 PMCID: PMC8427212 DOI: 10.1016/j.bioactmat.2021.05.055] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 05/29/2021] [Accepted: 05/29/2021] [Indexed: 12/26/2022] Open
Abstract
Ag/Ga were incorporated into resorbable orthopaedic phosphate bioactive glasses (PBG, containing P, Ca, Mg, Na, and Fe) thin films to demonstrate their potential to limit growth of Staphylococcus aureus and Escherichia coli in post-operative prosthetic implantation. Dual target consecutive co-sputtering was uniquely employed to produce a 46 nm Ag:PBG composite observed by high resolution TEM to consist of uniformly dispersed ~5 nm metallic Ag nano-particles in a glass matrix. Ga3+ was integrated into a phosphate glass preform target which was magnetron sputtered to film thicknesses of ~400 or 1400 nm. All coatings exhibited high surface energy of 75.4-77.3 mN/m, attributed to the presence of hydrolytic P-O-P structural surface bonds. Degradation profiles obtained in deionized water, nutrient broth and cell culture medium showed varying ion release profiles, whereby Ga release was measured in 1400 nm coating by ICP-MS to be ~6, 27, and 4 ppm respectively, fully dissolving by 24 h. Solubility of Ag nanoparticles was only observed in nutrient broth (~9 ppm by 24 h). Quantification of colony forming units after 24 h showed encouraging antibacterial efficacy towards both S. aureus (4-log reduction for Ag:PBG and 6-log reduction for Ga-PBG≈1400 nm) and E. coli (5-log reduction for all physical vapour deposited layers) strains. Human Hs27 fibroblast and mesenchymal stem cell line in vitro tests indicated good cytocompatibility for all sputtered layers, with a marginal cell proliferation inertia in the case of the Ag:PBG composite thin film. The study therefore highlights the (i) significant manufacturing development via the controlled inclusion of metallic nanoparticles into a PBG glass matrix by dual consecutive target co-sputtering and (ii) potential of PBG resorbable thin-film structures to incorporate and release cytocompatible/antibacterial oxides. Both architectures showed prospective bio-functional performance for a future generation of endo-osseous implant-type coatings.
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Affiliation(s)
- B.W. Stuart
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK
| | - G.E. Stan
- National Institute of Materials Physics, Magurele, RO, 077125, Romania
| | - A.C. Popa
- National Institute of Materials Physics, Magurele, RO, 077125, Romania
- Army Centre for Medical Research, Bucharest, RO, 010195, Romania
| | - M.J. Carrington
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK
| | - I. Zgura
- National Institute of Materials Physics, Magurele, RO, 077125, Romania
| | - M. Necsulescu
- Army Centre for Medical Research, Bucharest, RO, 010195, Romania
| | - D.M. Grant
- Advanced Materials Research Group, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, UK
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Wang S, Niu Y, Jia P, Liao Z, Guo W, Chaves RC, Tran-Ba KH, He L, Bai H, Sia S, Kaufman LJ, Wang X, Zhou Y, Dong Y, Mao JJ. Alkaline activation of endogenous latent TGFβ1 by an injectable hydrogel directs cell homing for in situ complex tissue regeneration. Bioact Mater 2021; 15:316-329. [PMID: 35356816 PMCID: PMC8935088 DOI: 10.1016/j.bioactmat.2021.12.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 12/14/2021] [Accepted: 12/14/2021] [Indexed: 12/20/2022] Open
Abstract
Utilization of the body's regenerative potential for tissue repair is known as in situ tissue regeneration. However, the use of exogenous growth factors requires delicate control of the dose and delivery strategies and may be accompanied by safety, efficacy and cost concerns. In this study, we developed, for the first time, a biomaterial-based strategy to activate endogenous transforming growth factor beta 1 (TGFβ1) under alkaline conditions for effective in situ tissue regeneration. We demonstrated that alkaline-activated TGFβ1 from blood serum, bone marrow fluids and soaking solutions of meniscus and tooth dentin was capable of increasing cell recruitment and early differentiation, implying its broad practicability. Furthermore, we engineered an injectable hydrogel (MS-Gel) consisting of gelatin microspheres for loading strong alkaline substances and a modified gelatin matrix for hydrogel click crosslinking. In vitro models showed that alkaline MS-Gel controllably and sustainably activated endogenous TGFβ1 from tooth dentin for robust bone marrow stem cell migration. More importantly, infusion of in vivo porcine prepared root canals with alkaline MS-Gel promoted significant pulp-dentin regeneration with neurovascular stroma and mineralized tissue by endogenous proliferative cells. Therefore, this work offers a new bench-to-beside translation strategy using biomaterial-activated endogenous biomolecules to achieve in situ tissue regeneration without the need for cell or protein delivery. Nonphysiological pH activates latent TGFβ1 in various tissue sources. Alkaline activation of endogenous TGFβ1 directs cell homing. Biomaterial-activated endogenous TGFβ1 induces regeneration of complex tissues.
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Penha KJDS, Roma FRVDO, Torres CRG, Bauer JRO, Firoozmand LM. Effect of bioactive glasses and neodymium:yttrium-aluminum-garnet laser on dentin permeability. J Conserv Dent 2021; 23:583-588. [PMID: 34083913 PMCID: PMC8095690 DOI: 10.4103/jcd.jcd_453_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/08/2020] [Accepted: 12/19/2020] [Indexed: 11/23/2022] Open
Abstract
Context: Dental hypersensitivity and loss of dental tissues are commonly observed in patients, and most of the problems are caused due to total or partial exposure of dentinal tubules. Aims: The purpose of this study is to evaluate the performance of 45S5 bioactive glass and niobophosphate (NbG) associated with neodymium: yttrium-aluminum-garnet (Nd:YAG) laser for the reduction of dentin permeability. Materials and Methods: Fifty bovine dentin discs were made and distributed randomly into five groups (n = 10). The Nd:YAG laser was applied with the bioactive glasses using the energy parameters (60 and 80 mJ), forming the groups; NbG_60: NbG + Nd:YAG (60 mJ); NbG_80: NbG + Nd:YAG (80 mJ), 45S5_60: 45S5 + Nd:YAG (60 mJ); 45S5_80: 45S5 + Nd:YAG (80 mJ) and C: control (untreated dentin). The permeability was measured with a split chamber device. The samples were subjected to the erosive challenge and a new permeability measurement was done. Furthermore, the dentin was analyzed by scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS). Statistical Analysis Used: The data were analyzed using Kruskal–Wallis and Dunn's tests (α = 0.05). Results: Greater reduction in dentinal permeability was observed for 45S5 bioactive glasses (45S5_60 and 45S5_80) followed by NbG_80 and NbG_60 (P < 0.05). The SEM/EDS analysis showed the formation of a barrier after the dentin treatment. Conclusions: Bioactive glasses with Nd:YAG laser on the dentin surface may be a promising alternative for the reduction of dentin permeability.
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Affiliation(s)
| | | | - Carlos Rocha Gomes Torres
- Department of Restorative Dentistry, Institute of Science and Technology of São José dos Campos (UNESP) - São Paulo State University, SP, Brazil
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Carvalho EM, Ferreira PVC, Gutiérrez MF, Sampaio RF, Carvalho CN, Menezes ASD, Loguercio AD, Bauer J. Development and characterization of self-etching adhesives doped with 45S5 and niobophosphate bioactive glasses: Physicochemical, mechanical, bioactivity and interface properties. Dent Mater 2021; 37:1030-1045. [PMID: 33846019 DOI: 10.1016/j.dental.2021.03.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 03/05/2021] [Accepted: 05/28/2021] [Indexed: 12/16/2022]
Abstract
OBJECTIVE The aim of study was to develop and characterize experimental bioactive glasses (45S5 and niobophosphate bioactive glass (NbG)) and evaluate the effects of their addition in self-etching adhesive systems on physicochemical, mechanical, and bioactive properties, microtensile bond strength (μTBS), and nanoleakage (NL). METHODS Two-step self-etching adhesive systems containing 5, 10, and 20 wt.% of 45S5 and NbG bioactive glasses were developed. An experimental adhesive without microparticles and a commercial adhesive (Clearfil SE Bond) were used as control groups. The materials were evaluated for their degree of conversion (DC%), ultimate tensile strength (UTS), softening in solvent, radiopacity, sorption and solubility, alkalizing activity (pH), ionic release, and bioactivity. μTBS and NL were evaluated after 24 h and 1 year of storage. The data were subjected to analysis of variance and post-Holm-Sidak tests (α = 0.05). RESULTS The addition of the two bioactive glasses did not change the values of the degree of conversion, ultimate tensile strength, and softening in solvent. The adhesive system containing 20% NbG showed the highest radiopacity. The incorporation of 45S5 increased water sorption and solubility, raised the pH, and allowed the release of large amounts of calcium. After 28 days of immersion in simulated body fluid, the 45S5 adhesive precipitated hydroxyapatite and calcium carbonate (SEM/EDX, ATR/FTIR, and XDR). The addition of 45S5 and NbG to the adhesives improved the stability of the resin-dentin interface after 1 year. SIGNIFICANCE The incorporation of microparticles from 45S5 bioactive glass in self-etching adhesive systems is considered an excellent alternative for the development of a bioactive adhesive that improves the integrity of the hybrid layer on sound dentin.
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Affiliation(s)
- Edilausson Moreno Carvalho
- University Ceuma (UNICEUMA), School of Dentistry, R. Josué Montello, 1, Renascença II, 65075-120 São Luis, Maranhão, Brazil.
| | - Paulo Vitor Campos Ferreira
- Department of Restorative Dentistry, Dental Materials Division, School of Dentistry, University of Campinas (UNICAMP), Av. Limeira, 901, 13414-903 Piracicaba, São Paulo, Brazil.
| | - Mario Felipe Gutiérrez
- Department of Biomaterials, School of Dentistry, Universidad de los Andes, Av. Monseñor Álvaro del Portillo 12455, 7550000 Las Condes, Santiago, Chile; Institute for Research in Dental Sciences, Faculty of Dentistry, University of Chile, Av. Olivos 943, 8380544 Independencia, Santiago, Chile.
| | - Ruan Ferreira Sampaio
- University Ceuma (UNICEUMA), School of Dentistry, R. Josué Montello, 1, Renascença II, 65075-120 São Luis, Maranhão, Brazil.
| | - Ceci Nunes Carvalho
- University Ceuma (UNICEUMA), School of Dentistry, R. Josué Montello, 1, Renascença II, 65075-120 São Luis, Maranhão, Brazil.
| | - Alan Silva de Menezes
- Department of Physics, Federal University of Maranhão (UFMA), Av. dos Portugueses, 1966, 65080-805 São Luís, Maranhão, Brazil.
| | - Alessandro Dourado Loguercio
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa (UEPG), Rua Carlos Cavalcanti, 4748, Campus Uvaranas, 84030-900 Ponta Grossa, Paraná, Brazil.
| | - José Bauer
- Discipline of Dental Materials, School of Dentistry, Federal University of Maranhão (UFMA), Av. dos Portugueses, 1966, 65080-805 São Luís, Maranhão, Brazil.
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Mocquot C, Attik N, Pradelle-Plasse N, Grosgogeat B, Colon P. Bioactivity assessment of bioactive glasses for dental applications: A critical review. Dent Mater 2020; 36:1116-1143. [PMID: 32605848 DOI: 10.1016/j.dental.2020.03.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/19/2020] [Accepted: 03/19/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVE In the context of minimally invasive dentistry and tissue conservation, bioactive products are valuable. The aim of this review was to identify, clarify, and classify the methodologies used to quantify the bioactive glasses bioactivity. METHODS Specific search strategies were performed in electronic databases: PubMed, Embase, Cochrane Library, and Scopus. Papers were selected after a review of their title, abstract, and full text. The following data were then examined for final selection: BAG investigated, objectives, criteria, methods, and outcomes. RESULTS Sixty-one studies published from 2001 to 2019, were included. The bioactivity of BAG can be evaluated in vitro in contact with solutions, enamel, dentin, or cells. Other studies have conducted in vivo evaluation by BAG contact with dentin and dental pulp. Studies have used various analysis techniques: evaluation of apatite with or without characterization or assessment of mechanical properties. Reprecipitation mechanisms and pulp cell stimulation are treated together through the term 'bioactivity'. SIGNIFICANCE Based on these results, we suggested a classification of methodologies for a better understanding of the bioactive properties of BAG. According to all in vitro studies, BAG appear to be bioactive materials. No consensus has been reached on the results of in vivo studies, and no comparison has been conducted between protocols to assess the bioactivity of other bioactive competitor products.
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Affiliation(s)
- Caroline Mocquot
- Université de Lyon - Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, 69372 Lyon Cedex 08, France; Assistance Publique-Hôpitaux de Paris, Hôpital Rothschild, Service d'Odontologie, Université de Paris, Faculté dentaire, France.
| | - Nina Attik
- Université de Lyon - Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, 69372 Lyon Cedex 08, France; Université de Lyon, Université Claude Bernard Lyon 1, Faculté d'Odontologie, 69008 Lyon, France.
| | - Nelly Pradelle-Plasse
- Université de Lyon - Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, 69372 Lyon Cedex 08, France; Assistance Publique-Hôpitaux de Paris, Hôpital Rothschild, Service d'Odontologie, Université de Paris, Faculté dentaire, France
| | - Brigitte Grosgogeat
- Université de Lyon - Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, 69372 Lyon Cedex 08, France; Université de Lyon, Université Claude Bernard Lyon 1, Faculté d'Odontologie, 69008 Lyon, France; Hospices civils de Lyon, Service d'Odontologie, 69007 Lyon, France
| | - Pierre Colon
- Université de Lyon - Université Claude Bernard Lyon 1, UMR CNRS 5615, Laboratoire des Multimatériaux et Interfaces, 69372 Lyon Cedex 08, France; Assistance Publique-Hôpitaux de Paris, Hôpital Rothschild, Service d'Odontologie, Université de Paris, Faculté dentaire, France
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Mahmoud O, Al-Meeri WA, Farook MS, Al-Afifi NA. Calcium Silicate-Based Cements as Root Canal Medicament. Clin Cosmet Investig Dent 2020; 12:49-60. [PMID: 32158275 PMCID: PMC7047992 DOI: 10.2147/ccide.s241015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 01/29/2020] [Indexed: 11/23/2022] Open
Abstract
Purpose This study aims to retard the setting reaction of CSC by mixing it with 2% chlorhexidine gel (CHX) which will be used as an intracanal medicament, and to evaluate the removal of the experimental medicaments from the root canal. Materials and Methods White Portland cement, white ProRoot MTA and Biodentine were mixed with 2% CHX. The setting time, flowability and film thickness of the CSC/CHX mixture (experimental medicaments) were assessed and measured following the standards of ISO specification. Calcium ion release was measured using ICP-OES, while pH was tested using a pH meter. Moreover, twenty single-rooted teeth were filled with the experimental medicaments for seven days, then the medicaments were removed and the samples analyzed using SEM. Calcium hydroxide paste was used as a control. Results The setting time of the experimental medicaments was inhibited until 84 days. The calcium ion release of the experimental medicaments was significantly higher compared to the control over the period of 14 days (P<0.001). The mean pH value was above 11.45 for all tested materials over a period of 14 days, with no significant difference between them (P<0.05). There was no significant difference in film thickness of the experimental medicaments compared to the control (P> 0.05). However, the flowability of the experimental medicaments was significantly higher than the control (P<0.05). SEM showed no significant differences in the removal of the intracanal medicaments between all the tested groups. Conclusion The addition of 2% CHX to CSCs retarded or inhibited its setting reaction over a period of 84 days. The calcium ion release and flowability of these experimental medicaments was found to be better than calcium hydroxide. Removal of the intracanal medicaments from the root canal was successfully achieved in all groups. Therefore, these experimental medicaments have the potential to be used as an enhanced root canal medicament.
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Affiliation(s)
- Okba Mahmoud
- Department of Restorative Dentistry, College of Dentistry, Ajman University, Ajman, United Arab Emirates.,Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Walid Ali Al-Meeri
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Mohideen Salihu Farook
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Nashwan Abdullah Al-Afifi
- Department of Restorative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia
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Grazziotin-Soares R, Dourado LG, Gonçalves BLL, Ardenghi DM, Ferreira MC, Bauer J, Carvalho CN. Dentin Microhardness and Sealer Bond Strength to Root Dentin are Affected by Using Bioactive Glasses as Intracanal Medication. MATERIALS 2020; 13:ma13030721. [PMID: 32033430 PMCID: PMC7040687 DOI: 10.3390/ma13030721] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 11/12/2019] [Accepted: 11/19/2019] [Indexed: 01/29/2023]
Abstract
This study investigated the human dentin microhardness (MH) and the MTA Fillapex® (Fillapex) and AH Plus®(AH) bond strength (BS) to dentin after using calcium hydroxide (Ca(OH)2) and bioactive glasses (45S5 and an experimental niobium phosphate bioactive glass (NbG)) as intracanal medications. For the MH test dentin slices were filled with medications and were submitted to Knoop MH (KHN) test (at day-0 (baseline data/without medication) and at day-15 (after using medication)). For the BS test, after medications had remained for 15 days in the roots, dentin slices were obtained and filled with the sealers. Seven days later, sealer BS to dentin was measured by push-out test (MPa). Data were statistically analyzed. Failure mode was visually assessed. The use of NbG, 45S5 for 15 days, increased the dentin MH and reduced the BS between AH sealer and dentin, but did not interfere with the Fillapex BS.
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Affiliation(s)
- Renata Grazziotin-Soares
- Department of Restorative Dental Sciences, College of Dentistry, University of Florida, Gainesville, FL 32610, USA (D.M.A.)
| | - Letícia Gomes Dourado
- School of Dentistry, CEUMA University, São Luís, 65065-470, Brazil; (L.G.D.); (B.L.L.G.); (M.C.F.)
| | | | - Diego Machado Ardenghi
- Department of Restorative Dental Sciences, College of Dentistry, University of Florida, Gainesville, FL 32610, USA (D.M.A.)
| | - Meire Coelho Ferreira
- School of Dentistry, CEUMA University, São Luís, 65065-470, Brazil; (L.G.D.); (B.L.L.G.); (M.C.F.)
| | - José Bauer
- Discipline of Dental Materials, School of Dentistry, University Federal of Maranhão (UFMA), São Luis 5085-582, Brazil
- Correspondence: (C.N.C.); (J.B.); Tel.: +55-98-98117-0078 (C.N.C.)
| | - Ceci Nunes Carvalho
- School of Dentistry, CEUMA University, São Luís, 65065-470, Brazil; (L.G.D.); (B.L.L.G.); (M.C.F.)
- Correspondence: (C.N.C.); (J.B.); Tel.: +55-98-98117-0078 (C.N.C.)
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Fernández-Yagüe M, Antoñanzas RP, Roa JJ, Biggs M, Gil FJ, Pegueroles M. Enhanced osteoconductivity on electrically charged titanium implants treated by physicochemical surface modifications methods. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2019; 18:1-10. [PMID: 30822556 DOI: 10.1016/j.nano.2019.02.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 02/05/2019] [Accepted: 02/08/2019] [Indexed: 12/11/2022]
Abstract
Biomimetic design is a key tenet of orthopedic device technology, and in particular the development of responsive surfaces that promote ion exchange with interfacing tissues, facilitating the ionic events that occur naturally during bone repair, hold promise in orthopedic fixation strategies. Non-bioactive nanostructured titanium implants treated by shot-blasting and acid-etching (AE) induced higher bone implant contact (BIC=52% and 65%) compared to shot-blasted treated (SB) implants (BIC=46% and 47%) at weeks 4 and 8, respectively. However, bioactive charged implants produced by plasma (PL) or thermochemical (BIO) processes exhibited enhanced osteoconductivity through specific ionic surface-tissue exchange (PL, BIC= 69% and 77% and BIO, BIC= 85% and 87% at weeks 4 and 8 respectively). Furthermore, bioactive surfaces (PL and BIO) showed functional mechanical stability (resonance frequency analyses) as early as 4 weeks post implantation via increased total bone area (BAT=56% and 59%) ingrowth compared to SB (BAT=35%) and AE (BAT=35%) surfaces.
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Affiliation(s)
- Marc Fernández-Yagüe
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC), EEBE, Barcelona, Spain; CURAM, Centre for Medical Devices. National University of Ireland, Galway, Galway, Ireland
| | - Roman Perez Antoñanzas
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC), EEBE, Barcelona, Spain; Bioengineering Institute of Technology, School of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Joan Josep Roa
- Structural Integrity, Micromechanics and Materials Reliability, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC), EEBE, Barcelona, Spain
| | - Manus Biggs
- CURAM, Centre for Medical Devices. National University of Ireland, Galway, Galway, Ireland
| | - F Javier Gil
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC), EEBE, Barcelona, Spain; Bioengineering Institute of Technology, School of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain.
| | - Marta Pegueroles
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC), EEBE, Barcelona, Spain
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Bauer J, Silva E Silva A, Carvalho EM, Ferreira PVC, Carvalho CN, Manso AP, Carvalho RM. Dentin pretreatment with 45S5 and niobophosphate bioactive glass: Effects on pH, antibacterial, mechanical properties of the interface and microtensile bond strength. J Mech Behav Biomed Mater 2018; 90:374-380. [PMID: 30408756 DOI: 10.1016/j.jmbbm.2018.10.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/22/2018] [Accepted: 10/23/2018] [Indexed: 01/29/2023]
Abstract
OBJECTIVES The aim of the study was to evaluate the effect of bioactive glass (45S5 and NbG) suspensions on bond strength (µTBS), hardness, modulus of elasticity, pH and antibacterial activity of the resin-dentin interfaces after 3 months. METHODS Groups with different concentrations (5% and 20%) of two types of glass (45S5 and NbG), and a control group (distilled water) were studied. Twenty-five extracted human third molars were etched with phosphoric acid. The data from µTBS, hardness and modulus of elasticity data were submitted to two-way ANOVA (suspension vs. time) and Holm-Sidak tests (=0.05). The antimicrobial activity data were analyzed by the Kruskal-Wallis test (α = 5%). RESULTS The interactions were significant among groups for µTBS (p = 0.033). Significant reductions in µTBS were observed after 3 months storage in PBS for the Control and 5% NbG Groups. Suspensions with 5% and 20% 45S5 glass and 20% NbG resulted in stable µTBS values and increased hardness after 3 months. Both 20% suspensions (45S5 and NbG) increased the elastic modulus. A significant greater reduction in bacterial growth was observed with the use of 20% 45S5. CONCLUSION Rewetting dentin with the suspension of 20% 45S5 glass prevented the reduction in bond strength; increased hardness; modulus of elasticity of the resin-dentin interface, and demonstrated antibacterial activity against Streptococcus mutans.
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Affiliation(s)
- José Bauer
- Discipline of Dental Materials, School of Dentistry, University Federal of Maranhão (UFMA), Av. dos Portugueses, 1966, Zip Code 65080-805, São Luis, Maranhão, Brazil.
| | - Allana Silva E Silva
- Discipline of Dental Materials, School of Dentistry, University Federal of Maranhão (UFMA), Av. dos Portugueses, 1966, Zip Code 65080-805, São Luis, Maranhão, Brazil
| | - Edilausson Moreno Carvalho
- Discipline of Dental Materials, School of Dentistry, University Federal of Maranhão (UFMA), Av. dos Portugueses, 1966, Zip Code 65080-805, São Luis, Maranhão, Brazil
| | - Paulo Vitor Campos Ferreira
- Department of Restorative Dentistry, Dental Materials Division, School of Dentistry, University of Campinas (UNICAMP), Av. Limeira, 901, Piracicaba 13414-903, SP, Brazil
| | - Ceci Nunes Carvalho
- Department of Restorative Dentistry, School of Dentistry, University Ceuma (UNICEUMA), R. Josué Montello, 1, Renascença II, Zip Code 65075-120 São Luis, Maranhão, Brazil
| | - Adriana Pigozzo Manso
- Department of Oral Health Sciences, Faculty of Dentistry, University of British Columbia (UBC), 368-2199 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 1Z3
| | - Ricardo Marins Carvalho
- Department of Oral Biology and Medical Sciences, Division of Biomaterials, Faculty of Dentistry, University of British Columbia (UBC), 368-2199 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 1Z3
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Santos Cardoso O, Coelho Ferreira M, Moreno Carvalho E, Campos Ferreira PV, Bauer J, Carvalho CN. Effect of Root Repair Materials and Bioactive Glasses on Microhardness of Dentin. IRANIAN ENDODONTIC JOURNAL 2018; 13:337-341. [PMID: 30083203 PMCID: PMC6064030 DOI: 10.22037/iej.v13i3.20565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Introduction: The use of bioactive glasses to re-establish or increase mechanical properties of the root dentin may be an interesting alternative. The aim of this study was to evaluate the effect of root repair materials and bioactive glasses on the microhardness of human root dentin. Methods and Materials: Sixty-four sectioned palatal roots of human molars were prepared and two slices were obtained of the middle third of each root (one corresponding to the control group, without treatment, and the other to the experimental group). The pairs of slices were randomly divided into four groups (n=16). The root canal of experimental slices were filled with one of the following materials: mineral trioxide aggregate (Angelus MTA, Angelus, Londrina, Paraná, Brazil), EndoSequence Root Repair Material (ERRM, Brassler, Savannah, GA, USA), Bioglass (45S5) and an experimental niobophosphate glass (NbG). The specimens were stored in an oven at 37ºC, in an environment with 100% humidity for 60 days. The specimens were subjected to a microhardness test. Four indentations were made at a distance of 20 µm from the root canal lumen. For microhardness analysis, comparing the experimental groups and their respective controls, the Student’s-t test was applied. For comparison of the percentage increase in microhardness between the groups, the data were statistically analyzed by using One-way ANOVA and Tukey’s test. The level of significance was set at 0.05. Results: All the materials significantly increased the dentin microhardness values (P<0.05). MTA showed a higher increase in microhardness (94.8±42.7%), similar to that of EndoSequence (62.3±39.9%). The 45S5 (46.5±30.0%) and NbG (53.8±31.3%) showed the lowest percentages of increase in microhardness, but were statistically similar to those of EndoSequence. Conclusion: All the materials tested were capable of increasing root dentin microhardness.
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Affiliation(s)
- Olinto Santos Cardoso
- School of Dentistry, CEUMA University, São Luis, Maranhão, Brazil.,Discipline of Dental Materials, School of Dentistry, Federal University of Maranhão, Maranhão, Brazil
| | | | | | | | - José Bauer
- Discipline of Dental Materials, School of Dentistry, Federal University of Maranhão, Maranhão, Brazil
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MELO MCDS, CAVALCANTE LC, OLIVEIRA LVD, CARVALHO CMRS. Avaliação da dissociação iônica do hidróxido de cálcio associado ao Aloe vera como veículo. REVISTA DE ODONTOLOGIA DA UNESP 2018. [DOI: 10.1590/1807-2577.02018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Resumo Introdução O hidróxido de cálcio é considerado uma medicação intracanal padrão ouro e diferentes substâncias podem ser empregadas como veículo para melhorar suas propriedades. O Aloe vera é um fitoterápico popularmente conhecido por babosa e que se destaca pela sua capacidade imunorreguladora, antimicrobiana, cicatrizante e pela biocompatibilidade celular. Objetivo Avaliar a dissociação iônica do hidróxido de cálcio, tendo o Aloe vera como veículo. Material e método O extrato de Aloe vera foi obtido diretamente da folha, submetido à filtração e armazenado em tubo Falcon estéril. Foram preparados dois grupos de medicação intracanal: o grupo controle, com hidróxido de cálcio e soro fisiológico, e o grupo experimental, com hidróxido de cálcio e Aloe vera como veículo. Resultado Não foi verificada uma diferença estatisticamente significativa entre as médias de liberação de cálcio dos grupos (p=0,944). Quando comparados os valores de forma pareada, considerando as diferentes avaliações ao longo do tempo, foi identificada uma diferença estatisticamente significativa (p=0,015) para o grupo experimental, de modo que os valores médios da liberação de cálcio foram superiores até o 21º dia do estudo. Conclusão O hidróxido de cálcio, quando associado ao Aloe vera, apresentou maior dissociação iônica que quando utilizado com água destilada. Tal resultado, associado às propriedades inerentes deste fitoterápico, sugerem que a pasta de hidróxido de cálcio e Aloe vera pode ser uma alternativa viável e promissora como medicação intracanal, e melhorar o reparo apical e periapical.
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Bioactivity and properties of an adhesive system functionalized with an experimental niobium-based glass. J Mech Behav Biomed Mater 2017; 78:188-195. [PMID: 29169095 DOI: 10.1016/j.jmbbm.2017.11.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 11/06/2017] [Accepted: 11/09/2017] [Indexed: 11/22/2022]
Abstract
OBJECTIVE This study evaluated the incorporation of niobophosphate bioactive glass (NbG) fillers into a commercial adhesive resin. MATERIALS AND METHODS The silanized (NbGs) or non-silanized (NbG) NbG was added to the commercial adhesive system One Step (OS) at 30% by weight; unfilled adhesive served as control. The bioactivity of adhesives was analyzed by SEM and FTIR/ATR after 28 days in PBS. The adhesives were evaluated as regards microtensile bond strength immediately and after six months (n = 6); degree of conversion (n = 3), microhardness (n = 5); and radiopacity (n = 3). Data from each test were submitted to ANOVA and Tukey tests (P <0.05). RESULTS FTIR/ATR analysis showed phosphate and carbonate precipitates on the NbG adhesive specimen surface. Statistical analysis of microtensile bond strength values showed that material x time interaction was not significant, but NbG group values were similar to those of unfilled adhesive (p <0.05). Addition of NbG did not alter the degree of conversion, but did increase microhardness and radiopacity values of the adhesive systems compared with those of the control group (OS). Incorporation of NbG into the adhesive system did not compromise the properties of the adhesive. CONCLUSION A smart adhesive system with bioactive properties, high radiopacity, microhardness, and similar bond strength and degree of conversion was obtained by incorporating 30% by weight of NbG.
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CAMARGO RVD, SILVA-SOUSA YTC, ROSA RPFD, MAZZI-CHAVES JF, LOPES FC, STEIER L, SOUSA-NETO MD. Evaluation of the physicochemical properties of silicone- and epoxy resin-based root canal sealers. Braz Oral Res 2017; 31:e72. [DOI: 10.1590/1807-3107bor-2017.vol31.0072] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/09/2017] [Indexed: 11/22/2022] Open
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Carneiro KK, Meier MM, Santos CCD, Maciel AP, Carvalho CN, Bauer J. Adhesives Doped with Bioactive Niobophosphate Micro-Filler: Degree of Conversion and Microtensile Bond Strength. Braz Dent J 2016; 27:705-711. [PMID: 27982183 DOI: 10.1590/0103-6440201601110] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 09/15/2016] [Indexed: 11/22/2022] Open
Abstract
To evaluate the effect of incorporating niobium phosphate bioactive glass (NbG) into commercial etch-and-rinse adhesive systems, with and without silane, on their degree of conversion (DC) (%) and microtensile bond strength (μTBS). The NbG micro-filler was added to two etch-and-rinse adhesive systems: One Step (OS) and Prime & Bond (PB) at 40% concentration. The following groups were formed: control without glass addition OS; addition of unsilanized NbG (OSNbG); addition of silanized NbG (OSNbGS); control without glass PB; addition of unsilanized NbG (PBNbG); addition of silanized NbG (PBNbGS). The DC was determined using total Fourier spectroscopy reflection (FTIR/ATR). For μTBS testing, 48 human third molars (n=8) were restored and sliced to obtain specimens (0.8 mm2) and they were tested at two different time intervals: immediately and after 6 months. The fracture mode was evaluated with a stereoscopic loupe (40×) and by scanning electron microscopy (SEM). The data were subjected to ANOVA and Tukey tests (a=0.05). NbG addition did not compromise the adhesive system DC values (p>0.05). Furthermore, the NbG added to the adhesive systems did not affect μTBS values (p>0.05). Fracture occurred predominantly at the dentin-adhesive interface. NbG bioactive glass did not affect the DC or microtensile bond strength results.
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Affiliation(s)
- Karina Kato Carneiro
- Department of Restorative Dentistry, Dental School, Universidade CEUMA, São Luís, MA, Brazil
| | - Marcia Margarete Meier
- Department of Chemistry, CCT, UDESC - Universidade do Estado de Santa Catarina, Joinville, SC, Brazil
| | - Clenilton Costa Dos Santos
- Materials Research Group, Physics Department, UFMA - Universidade Federal do Maranhão, São Luís, MA, Brazil
| | - Adeilton Pereira Maciel
- Department of Chemistry, CCET, UFMA - Universidade Federal do Maranhão, São Luís, MA, Brazil
| | - Ceci Nunes Carvalho
- Department of Endodontics, Dental School, Universidade CEUMA, São Luís, MA, Brazil
| | - José Bauer
- Discipline of Dental Materials, Dental School, UFMA - Universidade Federal do Maranhão, São Luís, MA, Brazil
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