Morphological studies of pseudowollastonite for biomedical application

Aza, Piedad N. De; Luklinska, Z. B.; Anseau, M. R.; Guitián, Francisco; Aza, S. De

doi:10.1111/j.1365-2818.1996.tb04794.x

Cited by 99 publications

(73 citation statements)

References 18 publications

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“…In addition, Ohura et al (15) showed that a calcium silicate binary glass, called CS and containing 48.3 wt% CaO and 51.7 wt% SiO 2 , it joins firmly to bone tissue. Subsequently, De Aza et al (16)(17)(18)(19) showed, for the first time, that a crystalline compound other than hydroxyapatite and containing no phosphate (viz. wollastonite, CaSiO 3 ) not only exhibits a high bioactivity in both simulated body fluid (SBF) and parotid saliva, but also bonds strongly to bone tissue (20,21).…”

Section: Reactivity In Physiological Mediamentioning

confidence: 99%

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Vidrios y Vitrocerámicos Bioactivos

Aza¹,

Aza²,

Peña³

et al. 2007

Bol. Soc. Esp. Ceram. Vidr.

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Since the late 1960´s, a great interest in the use of bioceramic materials for biomedical applications has been developed. In a previous paper, the authors reviewed crystalline bioceramic materials "sensus stricto", it is to say, those ceramic materials, constituted for non-metallic inorganic compounds, crystallines and consolidates by thermal treatment of powders at high temperature. In the present review, the authors deal with those called bioactive glasses and glassceramics. Although all of them are also obtained by thermal treatment at high temperature, the first are amorphous and the second are obtained by devitrification of a glass, although the vitreous phase normally prevails on the crystalline phases.After an introduction to the concept of bioactive materials, a short historical review of the bioactive glasses development is made. Its preparation, reactivity in physiological media, mechanism of bonding to living tissues and mechanical strength of the bone-implant interface is also reported. Next, the concept of glass-ceramic and the way of its preparation are exposed. The composition, physicochemical properties and biological behaviour of the principal types of bioactive glasses and glass-ceramic materials: Bioglass Vidrios y Vitrocerámicos BioactivosDesde finales de los años sesenta, se ha despertado un gran interés por el uso de los materiales biocerámicos para aplicaciones biomédicas. En un trabajo previo, los autores hicieron una revisión de los denominados materiales biocerámicos cristalinos en sentido estricto, es decir, de aquellos materiales, constituidos por compuestos inorgánicos no metálicos, cristalinos y consolidados mediante tratamientos térmicos a altas temperaturas. En el presente trabajo, los autores revisan el desarrollo de los vidrios bioactivos (biovidrios) y de las vitrocerámicas bioactivas. Si bien todos ellos son obtenidos también por tratamiento térmico a altas temperaturas, los primeros son amorfos y los segundos son obtenidos por desvitrificación de un vidrio, si bien la fase vítrea normalmente predomina sobre las fases cristalinas. Después de una introducción al concepto de material bioactivo, se expone una breve revisión histórica del desarrollo de los vidrios bioactivos. A continuación se describe su obtención, reactividad en suero fisiológico artificial, mecanismo de unión al tejido vivo y resistencia mecánica de la interfaz hueso-implante. Posteriormente, se expone el concepto de material vitrocerámico y el proceso de su obtención así como también se describen los principales tipos de vidrios y vitrocerámicos bioactivos (Bioglass ® , Ceravital ® , Cerabone ® , Ilmaplant ® and Bioverit ® ), sus composiciones, sus propiedades físico-químicas y sus comportamientos biológicos. Finalmente, se lleva a cabo también una corta revisión de los recubrimientos con vidrios bioactivos y de los materiales compuestos (composites) bioactivos así como de los usos más comunes de los vidrios y vitrocerámicos bioactivos.

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Section: Reactivity In Physiological Mediamentioning

confidence: 99%

“…Especially after Ohura et al (15) and De Aza et al (16)(17)(18)(19) demonstrated the formation of a CHA layer on Ca-SiO 2 glasses and wollastonite (CaSiO 3 ) respectively, both of which contain no phosphate ions and bond to bone tissue (20, 21. 26 -27).…”

Section: Reactivity In Physiological Mediamentioning

confidence: 99%

Vidrios y Vitrocerámicos Bioactivos

Aza¹,

Aza²,

Peña³

et al. 2007

Bol. Soc. Esp. Ceram. Vidr.

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“…Kokubo et al [258,259] and Ohtsuki et al [260] showed that the CaO-SiO 2 components contributed mainly to the bioactivity of the CaOÁSiO 2 -based glass and ceramics. De Aza et al [261][262][263][264] pointed out that wollastonite ceramics (CaSiO 3 ) were bioactive and Nonami and Tsutsumi [265] working with diopside (CaO-MgO-2SiO 2 ) ceramics found that an apatite layer was formed on the surface of diopside ceramics implanted into the bone of rabbits and monkeys. However, clinical applications have been sparse on account of their relatively poor mechanical properties.…”

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confidence: 99%

Surface modification of titanium, titanium alloys, and related materials for biomedical applications

Liu

Chu

Ding

2004

Materials Science and Engineering: R: Reports

3,032

1,477

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Titanium and titanium alloys are widely used in biomedical devices and components, especially as hard tissue replacements as well as in cardiac and cardiovascular applications, because of their desirable properties, such as relatively low modulus, good fatigue strength, formability, machinability, corrosion resistance, and biocompatibility. However, titanium and its alloys cannot meet all of the clinical requirements. Therefore, in order to improve the biological, chemical, and mechanical properties, surface modification is often performed. This article reviews the various surface modification technologies pertaining to titanium and titanium alloys including mechanical treatment, thermal spraying, sol-gel, chemical and electrochemical treatment, and ion implantation from the perspective of biomedical engineering. Recent work has shown that the wear resistance, corrosion resistance, and biological properties of titanium and titanium alloys can be improved selectively using the appropriate surface treatment techniques while the desirable bulk attributes of the materials are retained. The proper surface treatment expands the use of titanium and titanium alloys in the biomedical fields. Some of the recent applications are also discussed in this paper. #

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“…Los detalles de la preparación y caracterización de la pseudowollastonita se pueden encontrar en publicaciones anteriores (9,10).…”

Section: Methodsunclassified

“…En la mayoría de los casos, se observó la formación de una capa intermedia, rica en sílice, seguida por otra capa exterior de fosfato cálcico (1)(2)(3)(4)(5)(6)(7). Estudios previos in vitro e in vivo han puesto de manifiesto que la wollastonita (CaSiO 3 ), material cerámico policritalino bioactivo, forma una capa de hidroxiapatito (HA) en su superficie al entrar en contacto con suero fisiológico artificial (SFA), saliva humana parotidea o al ser implantada, uniéndose a través de dicha capa directamente al tejido óseo (3,4,(8)(9)(10)(11)(12).…”

Section: Introduccionunclassified

Efecto de la microestructura sobre la bioactividad de dos materiales vitrocerámicos del sistema CaSiO<sub>3</sub> â ZrO<sub>2</sub>

Aza¹,

Luklinska²

2003

Bol. Soc. Esp. Ceram. Vidr.

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Se estudia la influencia de la microestructura sobre la bioactividad de dos materiales vitrocerámicos con la misma composición química (87% en peso de CaSiO 3 y 13% en peso de ZrO 2 ). Por tratamiento térmico del vidrio se obtuvo un material vitrocerámico (WZ1), formado por wollastonita-2M y circona tetragonal como fases cristalinas. Dicho material vitrocerámico no presentó bioactividad en suero fisiológico artificial (SFA). Mediante procesado cerámico del polvo de vidrio, se obtuvo un material vitrocerámico (WZ2) con las mismas fases cristalinas pero con diferente microestructura, que resultó ser bioactivo. Los estudios in vitro en SFA del vitrocerámico WZ2, demostraron la formación de una capa de hidroxiapatito (HA) en su superficie. El producto de la reacción fue examinado por microscopia electrónica de barrido y transmisión (MEB y MET), ambas con microanálisis por energías dispersivas de rayos-X (EDS). Las medidas de pH, realizadas directamente en la interfase del SFA con los respectivos materiales vitrocerámicos, fueron determinantes para entender sus diferentes comportamientos. Palabras clave: Bioactividad, Vitrocerámicos, Microestructura, Wollastonita, Microscopia Electrónica de Barrido y de Transmisión Efect of the microstructure on the bioactivity of two glass-ceramics in the system CaSiO 3 -ZrO 2The work examines the influence of the microstructure on the in vitro bioactivity of two glass-ceramics with the same chemical composition. Two routes were used to obtain two glass-ceramics composed of 87 wt% CaSiO 3 -13 wt% ZrO 2 . Heat treatment of a monolith glass produces a glass-ceramic (WZ1) containing wollastonite-2M and tetragonal zirconia as crystalline phases. The WZ1 did not display bioactivity in vitro. Ceramising the glass, via powder technology route, formed a bioactive glass-ceramic (WZ2), with the same crystalline phases but different microstructure. The in vitro studies carried out on WZ2 showed the formation of an apatite-like layer on its surface during exposure to the simulated body fluid (SBF). The interfacial reaction product was examined by Scanning and Transmission Electron Microscopy, both instruments fitted with Energy-Dispersive X-ray Analysers. pH measurements, directly made at the interface of the two glass-ceramics with the simulated body fluid, were important in understanding their different behaviour during exposure to the same physiological environment.

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Morphological studies of pseudowollastonite for biomedical application

Cited by 99 publications

References 18 publications

Vidrios y Vitrocerámicos Bioactivos

Vidrios y Vitrocerámicos Bioactivos

Surface modification of titanium, titanium alloys, and related materials for biomedical applications

Efecto de la microestructura sobre la bioactividad de dos materiales vitrocerámicos del sistema CaSiO<sub>3</sub> â ZrO<sub>2</sub>

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Morphological studies of pseudowollastonite for biomedical application

Cited by 99 publications

References 18 publications

Vidrios y Vitrocerámicos Bioactivos

Vidrios y Vitrocerámicos Bioactivos

Surface modification of titanium, titanium alloys, and related materials for biomedical applications

Efecto de la microestructura sobre la bioactividad de dos materiales vitrocerámicos del sistema CaSiO<sub>3</sub> â ZrO<sub>2</sub>

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Efecto de la microestructura sobre la bioactividad de dos materiales vitrocerámicos del sistema CaSiO<sub>3</sub> â ZrO<sub>2</sub>