Physico-chemical characterization of zirconia–titania composites coated with an apatite layer for dental implants

Marchi, Juliana; Amorim, Eric M.; Lazar, Dolores Ribeiro Ricci; Ussui, Valter; Bressiani, Ana Helena A.; César, Paulo Francisco

doi:10.1016/j.dental.2013.07.002

Cited by 27 publications

(13 citation statements)

References 29 publications

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“…Ohko et al [ 98 ] stated that the effectiveness of the UV-based disinfection of catheters is three times higher if they were covered by a thin layer of nano-TiO 2 . A similar result of the TiO 2 /UV application was observed with infected dental implants [ 143 , 144 ]. High bactericidal efficiency of the TiO 2 /UV process was also reported in orthopaedics and cosmetic surgery in the case of S. aureus on implants coated by a thin layer of nano-TiO 2 [ 94 ].…”

Section: Reviewsupporting

confidence: 76%

Chances and limitations of nanosized titanium dioxide practical application in view of its physicochemical properties

et al. 2015

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Nanotechnology is a field of science that is nowadays developing in a dynamic way. It seems to offer almost endless opportunities of contribution to many areas of economy and human activity, in general. Thanks to nanotechnology, the so-called nanomaterials can be designed. They present structurally altered materials, with their physical, chemical and biological properties entirely differing from properties of the same materials manufactured in microtechnology. Nanotechnology creates a unique opportunity to modify the matter at the level of atoms and particles. Therefore, it has become possible to obtain items displaying new, useful properties, i.e. self-disinfecting and self-cleaning surfaces. Those surfaces are usually covered by a thin layer of a photocatalyst. The role of the photocatalyst is most of the time performed by the nanosized titanium dioxide (nano-TiO2). Excitation of nano-TiO2 by ultraviolet radiation initiates advanced oxidation processes and reactions leading to the creation of oxygen vacancies that bind water particles. As a result, photocatalytic surfaces are given new properties. Those properties can then be applied in a variety of disciplines, such as medicine, food hygiene, environmental protection or building industry. Practically, the applications include inactivation of microorganisms, degradation of toxins, removing pollutants from buildings and manufacturing of fog-free windows or mirrors.

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Section: Reviewsupporting

confidence: 76%

Chances and limitations of nanosized titanium dioxide practical application in view of its physicochemical properties

et al. 2015

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“…To further prevent bacterial adhesion antimicrobial coatings on the implant surfaces were introduced [35,36]. Zirconium oxide-based composites in terms of implant surface modification have a low surface free energy and were suggested for coating zirconia to increase osteosynthesis by reducing bioinactivity [1].…”

Section: Resultsmentioning

confidence: 99%

Initial Bacterial Adhesion on Different Yttria-Stabilized Tetragonal Zirconia Implant Surfaces in Vitro

et al. 2013

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Bacterial adhesion to implant biomaterials constitutes a virulence factor leading to biofilm formation, infection and treatment failure. The aim of this study was to examine the initial bacterial adhesion on different implant materials in vitro. Four implant biomaterials were incubated with Enterococcus faecalis, Staphylococcus aureus and Candida albicans for 2 h: 3 mol % yttria-stabilized tetragonal zirconia polycrystal surface (B1a), B1a with zirconium oxide (ZrO2) coating (B2a), B1a with zirconia-based composite coating (B1b) and B1a with zirconia-based composite and ZrO2 coatings (B2b). Bovine enamel slabs (BES) served as control. The adherent microorganisms were quantified and visualized using scanning electron microscopy (SEM); DAPI and live/dead staining. The lowest bacterial count of E. faecalis was detected on BES and the highest on B1a. The fewest vital C. albicans strains (42.22%) were detected on B2a surfaces, while most E. faecalis and S. aureus strains (approximately 80%) were vital overall. Compared to BES; coated and uncoated zirconia substrata exhibited no anti-adhesive properties. Further improvement of the material surface characteristics is essential.

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“…Titania (TiO 2 ) is a bioactive material and a preferred reinforcement to improve bioactivity of composite materials. It is also used for surface treatment of metallic and ceramic implants to improve bioactivity [ 13 ]. It has high mechanical resistance, biocompatibility, chemical stability in aqueous environments, chemical inertness and comes at low cost [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Primary Processing Techniques and Significance of Hall-Petch Strengthening on the Mechanical Response of Magnesium Matrix Composites Containing TiO2 Nanoparticulates

2015

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In the present study, Mg (1.98 and 2.5) vol % TiO2 nanocomposites are primarily synthesized utilizing solid-phase blend-press-sinter powder metallurgy (PM) technique and liquid-phase disintegrated melt deposition technique (DMD) followed by hot extrusion. Microstructural characterization of the synthesized Mg-TiO2 nanocomposites indicated significant grain refinement with DMD synthesized Mg nanocomposites exhibiting as high as ~47% for 2.5 vol % TiO2 NPs addition. X-ray diffraction studies indicated that texture randomization of pure Mg depends not only on the critical amount of TiO2 NPs added to the Mg matrix but also on the adopted synthesis methodology. Irrespective of the processing technique, theoretically predicted tensile yield strength of Mg-TiO2 nanocomposites was found to be primarily governed by Hall-Petch mechanism. Among the synthesized Mg materials, solid-phase synthesized Mg 1.98 vol % TiO2 nanocomposite exhibited a maximum tensile fracture strain of ~14.5%. Further, the liquid-phase synthesized Mg-TiO2 nanocomposites exhibited higher tensile and compression properties than those primarily processed by solid-phase synthesis. The tensile-compression asymmetry values of the synthesized Mg-TiO2 nanocomposite was found to be lower than that of pure Mg with solid-phase synthesized Mg 1.98 vol % TiO2 nanocomposite exhibiting as low as 1.06.

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Physico-chemical characterization of zirconia–titania composites coated with an apatite layer for dental implants

Cited by 27 publications

References 29 publications

Chances and limitations of nanosized titanium dioxide practical application in view of its physicochemical properties

Chances and limitations of nanosized titanium dioxide practical application in view of its physicochemical properties

Initial Bacterial Adhesion on Different Yttria-Stabilized Tetragonal Zirconia Implant Surfaces in Vitro

Effects of Primary Processing Techniques and Significance of Hall-Petch Strengthening on the Mechanical Response of Magnesium Matrix Composites Containing TiO2 Nanoparticulates

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