Pulsed laser deposition of hydroxyapatite thin films

Koch, Christopher F.; Johnson, S.; Kumar, Dhananjay; Jelínek, M.; Chrisey, Douglas B.; Doraiswamy, Anand; Jin, Chunming; Narayan, Roger J.; Mihăilescu, I. N.

doi:10.1016/j.msec.2006.05.025

Cited by 118 publications

(56 citation statements)

References 53 publications

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“…Plasma spray which involves spraying of molten (extremely heated) CaP/HA on the substrate is the most commonly used and commercially available technique. Besides the high deposition rates of this method, issues like the need for very high temperature (>10,000 ∘ C) and formation of the amorphous coating limit its application [70,75]. The benefits and drawbacks of different CaP/HA coating methods are summarized in Table 5.…”

Section: Deposition Of Ha/cap-based Compoundsmentioning

confidence: 99%

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

Aliyu

Rani

Ginta

et al. 2017

Advances in Materials Science and Engineering

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Surface treatment remained a key solution to numerous problems of synthetic hard tissues. The basic methods of implant surface modification include various physical and chemical deposition techniques. However, most of these techniques have several drawbacks such as excessive cost and surface cracks and require very high sintering temperature. Additive mixed-electric discharge machining (AM-EDM) is an emerging technology which simultaneously acts as a machining and surface modification technique. Aside from the mere molds, dies, and tool fabrication, AM-EDM is materializing to finishing of automobiles and aerospace, nuclear, and biomedical components, through the concept of material migrations. The mechanism of material transfer by AM-EDM resembles electrophoretic deposition, whereby the additives in the AM-EDM dielectric fluids are melted and migrate to the machined surface, forming a mirror-like finishing characterized by extremely hard, nanostructured, and nanoporous layers. These layers promote the bone in-growth and strengthen the cell adhesion. Implant shaping and surface treatment through AM-EDM are becoming a key research focus in recent years. This paper reports and summarizes the current advancement of AM-EDM as a potential tool for orthopedic and dental implant fabrication. Towards the end of this paper, the current challenges and future research trends are highlighted.

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Section: Deposition Of Ha/cap-based Compoundsmentioning

confidence: 99%

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

Aliyu

Rani

Ginta

et al. 2017

Advances in Materials Science and Engineering

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“…Poisson's ratios of mineral and collagen phases are reported as 0.28 (Gilmore and Katz 1982, deduced from the measurements of elastic wave velocities) and 0.25 (Akiva et al 1998;Jäger and Fratzl 2000, the "effective" value that simplifies nonlinear and anisotropic properties of collagen), respectively. For Young's modulus of the mineral phase, values are typically cited within the range between 100 and 150 GPa (Gilmore and Katz 1982;Koch et al 2007). It is noted that all these values are measured from artificial bulk crystalline hydroxyapatite samples.…”

Section: Materials Parametersmentioning

confidence: 99%

“…It is noted that all these values are measured from artificial bulk crystalline hydroxyapatite samples. The difference between these values (Gilmore and Katz 1982;Koch et al 2007;Vincent 1990) and the modulus value for the natural mineral nanoplates in bone will be discussed later. For the Young's modulus of collagen phase, literature reports a range from 0.8 to 1.5 GPa (Gupta et al 2005b;Heim et al 2006;Meyers et al 2008).…”

Section: Materials Parametersmentioning

confidence: 99%

“…The existence of amorphous hydroxyapatite may lower the average modulus of the mineral plate, because the Young's modulus of amorphous hydroxyapatite is significantly less than that of the fully crystalline phase; one study measured a value of 80 GPa for amorphous hydroxyapatite (Koch et al 2007). Employing the rule of mixtures (isostrain condition) to simply evaluate the modulus of such a core-shell structured mineral phase, the overall modulus for the mineral plate would be lowered to 95 GPa.…”

Section: Mineral Modulus Effectmentioning

confidence: 99%

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A new model to simulate the elastic properties of mineralized collagen fibril

Fang

Stock

Haeffner

et al. 2010

Biomech Model Mechanobiol

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Bone, because of its hierarchical composite structure, exhibits an excellent combination of stiffness and toughness, which is due substantially to the structural order and deformation at the smaller length scales. Here, we focus on the mineralized collagen fibril, consisting of hydroxyapatite plates with nanometric dimensions aligned within a protein matrix, and emphasize the relationship between the structure and elastic properties of a mineralized collagen fibril. We create two- and three-dimensional representative volume elements to represent the structure of the fibril and evaluate the importance of the parameters defining its structure and properties of the constituent mineral and collagen phase. Elastic stiffnesses are calculated by the finite element method and compared with experimental data obtained by synchrotron X-ray diffraction. The computational results match the experimental data well, and provide insight into the role of the phases and morphology on the elastic deformation characteristics. Also, the effects of water, imperfections in the mineral phase and mineral content outside the mineralized collagen fibril upon its elastic properties are discussed.

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“…This plasma cloud expands, either in vacuum or in a gaseous environment, and deposits on a substrate, typically with a temperature in the range of 350-600 °C, producing a thin adherent film onto the target [192]. An alternative set-up called matrix assisted pulsed laser evaporation (MAPLE) was developed for delicate and accurate deposition of both organic and inorganic materials [133]. Ion beam assisted deposition (IBAD) is a vacuum technique that has also been used to deposit very thin ceramic coating layers on metals, polymers or ceramics.…”

Section: Dry Deposition Techniquesmentioning

confidence: 99%

Surface Engineering for Bone Implants: A Trend from Passive to Active Surfaces

et al. 2012

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Abstract:The mechanical and biological properties of bone implants need to be optimal to form a quick and firm connection with the surrounding environment in load bearing applications. Bone is a connective tissue composed of an organic collagenous matrix, a fine dispersion of reinforcing inorganic (calcium phosphate) nanocrystals, and bone-forming and -degrading cells. These different components have a synergistic and hierarchical structure that renders bone tissue properties unique in terms of hardness, flexibility and regenerative capacity. Metallic and polymeric materials offer mechanical strength and/or resilience that are required to simulate bone tissue in load-bearing applications in terms of maximum load, bending and fatigue strength. Nevertheless, the interaction between devices and the surrounding tissue at the implant interface is essential for success or failure of implants. In that respect, coatings can be applied to facilitate the process of bone healing and obtain a continuous transition from living tissue to the synthetic implant. Compounds that are inspired by inorganic (e.g., hydroxyapatite crystals) or organic (e.g., collagen, extracellular matrix components, enzymes) components of bone tissue, are the most obvious candidates for application as implant coating to improve the performance of bone implants. This review provides an overview of recent trends and strategies in surface engineering that are currently investigated to improve the biological performance of bone implants in terms of functionality and biological efficacy. OPEN ACCESSCoatings 2012, 2 96

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Pulsed laser deposition of hydroxyapatite thin films

Cited by 118 publications

References 53 publications

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

A Review of Additive Mixed-Electric Discharge Machining: Current Status and Future Perspectives for Surface Modification of Biomedical Implants

A new model to simulate the elastic properties of mineralized collagen fibril

Surface Engineering for Bone Implants: A Trend from Passive to Active Surfaces

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