Bond-coating in plasma-sprayed calcium-phosphate coatings

Oktar, Faik N.; Yetmez, Mehmet; Agathopoulos, Simeon; Goerne, T. M. Lopez; Göller, Gültekin; Peker, Irem; Ferreira, J.M.F.

doi:10.1007/s10856-006-0714-5

Cited by 5 publications

(6 citation statements)

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“…As reported very recently, cell culture 34 and some in vivo 32 and in vitro 33,20 tests showed that the usability of EHA for grafting and plasma‐spraying applications were already improved. As a further complementary step, this study showed that PSZ‐reinforced EHA composites could also be a promising bioceramic material with sufficient load‐carrier capacity.…”

Section: Discussionmentioning

confidence: 74%

Microstructural and Mechanical Properties of Hydroxyapatite–Zirconia Composites

Erkmen

Genç

Oktar

2007

Journal of the American Ceramic Society

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This work focuses on the improvement of the mechanical properties of hydroxyapatite (HA) through the addition of 3 mol% yttria partially stabilized zirconia (PSZ). Enamel‐derived HA (EHA) from freshly extracted human teeth and commercial HA (CHA) were chosen as the matrix. The effects of addition up to 10 wt% of PSZ and of sintering temperature (1000°–1300°C) on the density, microhardness, and compression strength were evaluated. For EHA–PSZ composites, the density and mechanical properties were generally enhanced by adding 5 wt% PSZ, especially after sintering at 1200°C, whereas CHA–PSZ composites showed lower strength values at sintering temperatures of 1200° and 1300°C with respect to EHA–PSZ composites. This may be due to the lower stability of CHA–PSZ composites with higher amounts of calcium zirconate formed over 1100°C when compared with EHA–PSZ composites.

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Section: Discussionmentioning

confidence: 74%

Microstructural and Mechanical Properties of Hydroxyapatite–Zirconia Composites

Erkmen

Genç

Oktar

2007

Journal of the American Ceramic Society

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“…The abovementioned reaction and the decomposition of hydroxyapatite are responsible for increasing the porosity and thus decreasing both the crushing and bending strengths [8,9]. 4 were all alive, while some cells in contact with MH 1 were dead. However, when the samples were in contact with the cells for 7 and 10 days, all of the cells remained a live (Figure 8).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Calcium phosphate ceramics, which exist in different phases, are the most common materials to be used due to their bioactivity and degradability [1]. Hydroxyapatite (HA) is a member of the calcium phosphate family and has extraordinary properties that make this material compatible with bone tissues and enhance bone growth [2][3][4][5]. HA has been used for many clinical applications, such as bone repair, bone growth, and coating of metallic implants [6].…”

Section: Introductionmentioning

confidence: 99%

Forsterite/nano-biogenic hydroxyapatite composites for biomedical applications

Naga

Hassan

Awaad

et al. 2020

Journal of Asian Ceramic Societies

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Recently, silicate materials have received attention as materials with promising applications in the bioceramics field. A recent study aimed to investigate the effect of forsterite (Mg 2 SiO 4) addition to biogenic hydroxyapatite, Ca 10 (PO 4) 6 (OH) 2 , on the phase formation, physical and mechanical properties, and biocompatibility of the produced composites. Different proportions of forsterite, 10 to 40 mass%, were added to hydroxyapatite obtained from fish bones to prepare the target composites. Various techniques, such as X-ray diffraction analysis (XRD), scanning electronic microscope (SEM), transmission electronic microscope (TEM), mechanical strength measurements and in vitro studies, were carried out to evaluate the composite properties. The results indicate that the addition of 20 to 40 mass% forsterite led to the transformation of forsterite into protoenstatite and the formation of Mg-rich whitlockite at the expense of hydroxyapatite. It is concluded that 20 mass% forsterite is the optimum addition amount to enhance the physical and mechanical properties of the produced composites. The cell culture tests and in vitro studies agree with the abovementioned results.

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“…However, the benefits deriving from the presence of a bond coat are manifold, especially in biological applications, because the bond coat is expected to increase the coating durability, to hinder the release of metal ions from the metal substrate and to reduce the fatigue phenomena caused by the cyclic loading-unloading of the implant in service conditions (Goller, 2004;Heimann, 1999Heimann, , 2006Kurzweg et al, 1998;Oktar et al, 2006).…”

Section: Functionally Graded Coatingsmentioning

confidence: 99%