Characterization of calcium phosphates precipitated from simulated body fluid of different buffering capacities

Li, Jianguo; Liao, H.; Sjöström, Malena

doi:10.1016/s0142-9612(96)00206-2

Cited by 67 publications

(52 citation statements)

References 16 publications

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“…Several studies have been carried out and the results demonstrated that HA can accelerate initial biological response with host tissues at the implanted site in the body and improves the bone-implant adhesion [3,4]. Evidence of rapid bone formation and subsequently healing around damaged sites in the body were also observed [5,6]. Due to these excellent biocompatibility properties, HA ceramics have been widely used in many medical, orthopaedic and dental applications including the augmentation of the jaw, dental implants, spinal surgery, maxillofacial surgery and artificial middle ear implants [1,2].…”

Section: Introductionmentioning

confidence: 99%

Consolidation of nanocrystalline hydroxyapatite powder

Ramesh

Tan

Sopyan

et al. 2007

Science and Technology of Advanced Materials

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The effect of sintering temperature on the sinterability of synthesized nanocrystalline hydroxyapatite (HA) was investigated. The starting powder was synthesized via a novel wet chemical route. HA green compacts were prepared and sintered in atmospheric condition at various temperatures ranging from 900-1300 1C. The results revealed that the thermal stability of HA phase was not disrupted throughout the sintering regime employed. In general, the results showed that above 98% of theoretical density coupled with hardness of 7.21 GPa, fracture toughness of 1.17 MPa m 1/2 and Young's modulus of above 110 GPa were obtained for HA sintered at temperature as low as 1050 1C. Although the Young's modulus increased with increasing bulk density, the hardness and fracture toughness of the sintered material started to decline when the temperature was increased beyond 1000-1050 1C despite exhibiting high densities 498% of theoretical value. The occurrence of this phenomenon is believed to be associated with a thermal-activated grain growth process. r

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Section: Introductionmentioning

confidence: 99%

Consolidation of nanocrystalline hydroxyapatite powder

Ramesh

Tan

Sopyan

et al. 2007

Science and Technology of Advanced Materials

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“…After the immersion in SBF, the surface of both types of coatings (with and without the glass topcoat) was covered by dome-like structures which are typical of hydroxy-carbonate-apatite (HCA) deposits grown in vitro [45,46]. However, a direct comparison between the two types of samples ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Functional bioactive glass topcoats on hydroxyapatite coatings: Analysis of microstructure and in-vitro bioactivity

Cattini

Bellucci

Sola

et al. 2014

Surface and Coatings Technology

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glass topcoats on hydroxyapatite coatings: Analysis of microstructure and in-vitro bioactivity. Surface and Coatings Technology, Elsevier, 2014, 240, pp.110-117. 10.1016/j.surfcoat.2013 Functional bioactive glass topcoats on hydroxyapatite coatings: Analysis of microstructure and in-vitro bioactivity A bioactive glass topcoat was introduced to modify the surface morphology and in-vitro reactivity of hydroxyapatite (HA) coatings for biomedical applications. With this aim, a CaO-rich bioactive glass, termed BG_Ca (wt.%: 4.7 Na 2 O, 42.3 CaO, 6.1 P 2 O 5 , and 46.9 SiO 2 ), was selected due to its good bioactivity and low tendency to crystallize at high temperature. The standard HA coatings were sprayed through atmospheric plasma spray (APS) on steel substrates starting from commercial powders ("APS-HA" samples). The HA coatings, in turn, were subsequently coated with a thin layer of bioactive glass by suspension plasma spray (SPS), thus obtaining the duplex systems ("APS-HA/SPS-BG_Ca" samples). The samples with and without the BG_Ca layer were analysed by microstructural characterization and by in vitro tests in simulated body fluid (SBF). The analysis revealed an increased reactivity of the APS-HA/SPS-BG_Ca samples compared to the glass-free APS-HA coatings.

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“…Li et al reported that Ca/P molar ratios and chemical compositions of the calcium phosphate precipitates were affected by the pH of the SBF, and an apatite with Ca/P molar ratio close to the HA was obtained if the pH of the solution was continuously adjusted to 7.26 during calcium phosphate precipitated from SBF(J.G. Li, et al, 1997). Chou et al used two-step immersion process to investigate the influence of solution pH of initial SBF×5 solution on micro-structural evolution and final apatite structure.…”

Section: Effects Of Ion Concentration and Type In Simulated Body Fluimentioning

confidence: 99%