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Controlled release of theophylline through semi-interpenetrating network microspheres of chitosan-(dextran-g-acrylamide)
Springer Science and Business Media LLC - Tập 20 - Trang 1437-1445 - 2009
Semi-interpenetrating network microspheres of chitosan-(dextran-g-acrylamide) were prepared by emulsion-crosslinking method using glutaraldehyde (GA) as a crosslinking agent. Graft copolymerization of dextran with acrylamide (Dx-g-AAm) was carried out by aqueous free-radical polymerization using ceric ammonium nitrate (CAN) as initiator. The grafting efficiency was found to be 92%. Theophylline (T...... hiện toàn bộ
Effects of negatively and positively charged Ti metal surfaces on ceramic coating adhesion and cell response
Springer Science and Business Media LLC - Tập 28 - Trang 1-9 - 2017
This manuscript reports an evaluation of the effects of simple chemical-heat treatments on the deposition of different ceramic coatings, i.e., TiO2, CaTiO3 and CaP, on commercially pure titanium (cp-Ti) and Ti6Al4V and the influence of the coatings on cells interaction with the surfaces. The ceramic materials were prepared by the sol-gel method and the coating adhesion was analyzed by pull-off ben...... hiện toàn bộ
Histological study on sinus lift grafting by Fisiograft and Bio-Oss
Springer Science and Business Media LLC - Tập 16 - Trang 789-793 - 2005
The work aims to provide a histological investigation of Fisiograft®, a PLA/PGA copolymer, used as filler for bone defects in humans. The study was performed on biopsies of sinus lifts where Bio-Oss® and Fisiograft® gel were applied as graft material. Bone regeneration was satisfactory in all sinus lifts, even when Fisiograft® was applied alone. Due to remarkable osteoclast activity, Bio-Oss® gran...... hiện toàn bộ
The antibacterial effects of zinc ion migration from zinc-based glass polyalkenoate cements
Springer Science and Business Media LLC - Tập 17 - Trang 489-494 - 2006
Zinc-based glass polyalkenoate cements have been synthesised and their potential use in orthopaedic applications investigated. Zinc ions were released from the materials in a rapid burst over the first 24 h after synthesis, with the release rate falling below detectable levels after 7 days. Cement-implanted bone samples were prepared and the released zinc was shown, using energy dispersive X-ray a...... hiện toàn bộ
The crystallization of Hydroxyapatite in the presence of sodium alginate
Springer Science and Business Media LLC - Tập 16 - Trang 733-737 - 2005
The effect of sodium alginate on the crystal growth of hydroxyapatite (HAP) was investigated at sustained supersaturation by the constant composition technique. Sodium alginate was found to inhibit HAP crystal growth at low concentrations and reduced the crystal growth rates by 42–86% for inhibitor concentrations of 2.1 × 10− 7–12.6 × 10− 7 mol/l. The inhibition effect on the crystal growth rate m...... hiện toàn bộ
The influence of crosslinking agents and diamines on the pore size, morphology and the biological stability of collagen sponges and their effect on cell penetration through the sponge matrix
Springer Science and Business Media LLC - Tập 12 - Trang 833-844 - 2001
Artificial skin substitutes based on autologous keratinocytes cultured on collagen substrata are being developed for treating patients with severe burns. The properties of the collagen substrate can be manipulated, for example, by crosslinking, to optimize desirable properties such as cell growth and penetration into the substrate, biological stability and mechanical strength. Collagen sponges cro...... hiện toàn bộ
Effect of silver nanoparticle geometry on methicillin susceptible and resistant Staphylococcus aureus, and osteoblast viability
Springer Science and Business Media LLC - Tập 26 - Trang 1-7 - 2015
Orthopedic implant failure as a result of bacterial infection affects approximately 0.5–5 % of patients. These infections are often caused by Staphylococcus aureus which is capable of attaching and subsequently forming a biofilm on the implant surface, making it difficult to eradicate with systemic antibiotics. Further, with the emergence of antibiotic-resistant bacteria, alternative treatments a...... hiện toàn bộ
Preparation and characterization of an electrodeposited calcium phosphate coating associated with a calcium alginate matrix
Springer Science and Business Media LLC - Tập 16 Số 1 - Trang 9-13 - 2005
A new way of optimizing osteoconduction of biomaterials is to bring to them biological properties. In this work, we associated a novel release system with an electrodeposited calcium phosphate (CaP) coated titanium alloy Ti6Al4V. The characterization of this material was performed by means of light microscopy, scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM) and...... hiện toàn bộ
Surface characteristics and bioactivity of oxide film on titanium metal formed by thermal oxidation
Springer Science and Business Media LLC - Tập 18 - Trang 565-575 - 2007
In this study, we characterized the surface of oxide film formed on titanium metal through the use of thermal treatment and investigated the effect of surface characteristics on the bioactivity of titanium. The as-received sample group was prepared by polishing and cleaning CP-Ti as a control group, and thermally oxidized sample groups were prepared by heat treating at 530, 600, 700, 800, 900, and...... hiện toàn bộ
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