Plasma-sprayed bovine hydroxyapatite coatings

Özyeğin, L.S.; Oktar, Faik N.; Göller, Gültekin; Kayalı, E. Sabri; Yazıcı, Tokay

doi:10.1016/j.matlet.2004.03.033

Cited by 84 publications

(55 citation statements)

References 11 publications

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“…Calcination of chlorapatite in a steam also leads to the formation of a stoichiometric HAp [59]. Non-stoichiometric HAp can be derived from natural materials such as bovine bones [60][61][62], fish bones [63], coral [64][65][66] and eggshell [67,68] after thermal treatments. By controlling the parameters of the solid-state reactions, the morphological control of the products in the nanoscale can be achieved.…”

Section: Dry Synthesismentioning

confidence: 99%

Hydroxylapatite nanoparticles: fabrication methods and medical applications

Okada

Furuzono

2012

Science and Technology of Advanced Materials

126

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Hydroxylapatite (or hydroxyapatite, HAp) exhibits excellent biocompatibility with various kinds of cells and tissues, making it an ideal candidate for tissue engineering, orthopedic and dental applications. Nanosized materials offer improved performances compared with conventional materials due to their large surface-to-volume ratios. This review summarizes existing knowledge and recent progress in fabrication methods of nanosized (or nanostructured) HAp particles, as well as their recent applications in medical and dental fields. In section 1, we provide a brief overview of HAp and nanoparticles. In section 2, fabrication methods of HAp nanoparticles are described based on the particle formation mechanisms. Recent applications of HAp nanoparticles are summarized in section 3. The future perspectives in this active research area are given in section 4.

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Section: Dry Synthesismentioning

confidence: 99%

Hydroxylapatite nanoparticles: fabrication methods and medical applications

Okada

Furuzono

2012

Science and Technology of Advanced Materials

126

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“…Natural HA types are produced from various natural sources (i.e. human bone-tooth, bovine bone, sheep bone, chicken bone) with calcination method [3][4][5][6][7][8][9]. Besides HA, there are other apatite-like materials which could be easily resorbed at orthopaedic and dental * corresponding author; e-mail: bozkurtdu@itu.edu.tr grafting procedures, like other calcium phosphates with resorable phases (α-tricalcium phosphate, β-tricalcium phosphate or whitlockite) [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Bioceramic Production from Sea Urchins

et al. 2012

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Bioceramic nanopowders, currently one of the most demanding challenges for producing new biomaterials, have been tackled only when starting from chemical reagents. There are few studies aiming at producing hydroxyapatite nanopowders from naturally derived raw materials, such as nacre shells. Natural species of sea origin, such as corals and nacres, always attract special interest in biomaterials science and technology. Nacre shells are made up of pure aragonite crystallized in an organic matrix. The most common way to transform aragonite structures to hydroxyapatite is via hydrothermal transformation under very high pressure. However, such ways can be very dangerous if the equipment is worn. Ultrasonic and hotplate methods are apparently very safe. This work proposes a new approach for developing highly bioactive fine powders of Ca-phosphates (which can be used afterwards to build up hydroxyapatite-based bioceramic bone-scaffolds) from sea urchins via the above mentioned methods. The suspended raw powders were put on a hotplate (i.e. ultrasound). The temperature was set to 80• C for 15 min and then, equivalent (to the amount of CaCO 3 in the sea urchins) amount of H 3 PO 4 was added drop by drop into the solution. The reaction continued for 2 h. Then, to evaporate the liquid part, the mixture was put into an incubator at 100• C for 24 h and the resultant dried sediment was collected. X-ray diffraction analysis identified various calcium phosphate phases, predominantly monetite, and tricalcium phosphate as a secondary phase. The worldwide availability and the low cost of all kinds of nacre and sea urchin shells, along with their biological-natural origin are attractive features conferring to them a high potential for preparing calcium phosphate materials for uses in biomedicine. Heart urchin, used in this study, can be an ideal candidate for producing bioceramic particles.

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“…HA is a nontoxic and biocompatible material which could be used with bone tissues. It is usually used as an implant material both in its bulk form at grafting areas and as a thin biocompatible coating on metal implant surfaces to promote the osseointegration process [1]. But it has poor mechanical properties especially in wet environments.…”

Section: Introductionmentioning

confidence: 99%

“…Natural bioceramics can be obtained on economic production, but they can potentially bear some unwanted fatal diseases, such as human immunodeficiency virus (HIV), or bovine spongiform encephalopathy (BSE) [4,5]. Safety issues about different infection sources from different HA sources were discussed in some recent papers [1,5]. Ozyegin et al had reported that high temperature calcination (850 • C) of HA structures could prevent disease transmission [1].…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and Microstructural Properties of Sheep Hydroxyapatite (SHA)-Niobium Oxide Composites

2012

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The aim of this study is to produce and to investigate the mechanical and microstructural properties of composite materials made of hydroxyapatite, obtained from natural sheep bone and niobium oxide (5 and 10 wt%). Sheep hydroxyapatite (SHA) matrix was reinforced with 5 and 10 wt% of niobium (Nb) oxide powder. The calcinated SHA was ball milled separately with 5% and 10% niobium oxide for 4 h. The samples were subjected to sintering at different temperatures between 1000• C and 1300• C. The mechanical properties were determined by measuring compression strength and Vickers microhardness (HV). X-ray diffraction and scanning electron microscopy studies were carried out to analyze the microstructure. With increasing sintering temperature, mechanical properties of composites increased. The SHA-composites with 10 wt% niobium oxide addition had better mechanical properties at all sintering temperatures. The highest mechanical properties were obtained in SHA-10 wt% niobium oxide composite sintered at 1300• C. Adding of niobium oxide to SHA could be a valuable method to produce rigid and high load carrying ability HA composite which is suitable for orthopedic applications.

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Plasma-sprayed bovine hydroxyapatite coatings

Cited by 84 publications

References 11 publications

Hydroxylapatite nanoparticles: fabrication methods and medical applications

Hydroxylapatite nanoparticles: fabrication methods and medical applications

Bioceramic Production from Sea Urchins

Mechanical and Microstructural Properties of Sheep Hydroxyapatite (SHA)-Niobium Oxide Composites

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