Biomimetic Hydroxyapatite Coating on Metal Implants
TLDR
In this paper, a biomimetic coating was applied on titanium and porous-tantalum implants to facilitate rapid bone formation around the implant, reducing therewith the patient's recovery time after surgery.Abstract:
The combination of the high mechanical strength of metals with the osteoconductive properties of calcium phosphates make hydroxyapatite coatings on titanium implants widely used in orthopedic surgery However, the most popular coating method, plasma spraying, exhibits some important drawbacks: the inability to cover porous implants and to incorporate biologically active agents, delamination, and particle release The aim of this study was to elaborate a dense, strong, and thick calcium-phosphate coating on titanium and porous-tantalum implants using a two-step biomimetic procedure In the first step, the implants were soaked in a solution that was 5 times more concentrated than regular simulated body fluid (SBF-A solution) A thin but uniform amorphous calcium-phosphate coating was deposited on the metal Then, the implants were immersed in the SBF-B solution, which had a similar composition as the SBF-A solution, but with decreased contents of crystal growth inhibitors (ie, Mg2+ and HCO3−) This resulted in the fast precipitation of a 30 μm thick crystalline calcium-phosphate coating The pH of the SBF-B solution and the thickness of the crystalline coating layer were studied as a function of time The Fourier transform infrared spectra and X-ray diffraction patterns showed that this new coating closely resembles bone mineral Our biomimetic coating should facilitate rapid bone formation around the implant, reducing therewith the patient's recovery time after surgeryread more
Citations
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Journal ArticleDOI
Biomimetic Process in Metals
TL;DR: In this paper, a biomimetic process has been used to simulate a simulated body fluid (SBF) with ionic concentration close to human blood plasma or in a simulated human body fluid with an ionic level 1.5 times that of the SBF (1.5SBF).
Dissertation
Synthèse et consolidation à basse température de biocéramiques en apatite phosphocalcique carbonatée
TL;DR: In this paper, a coeur de nanocristaux d'apatite d'amorphes is defined, where the poudres sont consolidees par frittage flash or Spark Plasma Sintering (SPS) a basse temperature.
Journal ArticleDOI
Controlling the Biodegradation Rate of AZ31with Biomimetic Apatite Coating
TL;DR: In this article, the samples of AZ31 were ultrasonically cleaned using distilled water, and then the coating was formed on the surfaces of the samples by biomimetic process.
Journal ArticleDOI
In Situ Formation of Copper Phosphate on Hydroxyapatite for Wastewater Treatment
TL;DR: In this paper , the surface activity of hydroxyapatite (HAp) in wastewater treatment which undergoes peroxodisulfate (PDS) activation is controlled by loading the catalytically active Cu species on HAp forms a copper phosphate in the outer layer of HAp.
Journal ArticleDOI
Solvothermal Growth of Ultralong Hydroxyapatite Nanowire Coating on Glass Substrate
Tuan-Wei Sun,Ying-Jie Zhu +1 more
TL;DR: In this paper, the authors developed a simple method to grow an ultralong hydroxyapatite nanowire coating on a substrate and applied it to a glass substrate.
References
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Journal ArticleDOI
Solutions able to reproduce in vivo surface-structure changes in bioactive glass-ceramic A-W.
TL;DR: The results support the concept that the apatite phase on the surface of glass-ceramic A-W is formed by a chemical reaction of the glass- Aceramic with the Ca2+, HPO4(2-), and OH- ions in the body fluid.
Book
Structure and chemistry of the apatites and other calcium orthophosphates
TL;DR: In this paper, the authors describe the structure of carbonate apatites and the properties of apatite powders, including their properties in terms of their nucleation and crystal growth.
Journal ArticleDOI
Preparation of bioactive Ti and its alloys via simple chemical surface treatment.
TL;DR: The present chemical surface modification is expected to allow the use the bioactive Ti and its alloys as artificial bones even under load-bearing conditions.
Journal ArticleDOI
The Norwegian Arthroplasty Register: 11 years and 73,000 arthroplasties.
Leif Ivar Havelin,Lars B. Engesæter,Birgitte Espehaug,Ove Furnes,Stein Atle Lie,Stein Emil Vollset +5 more
TL;DR: Compared the results of primary cemented and uncemented hip pros theses in patients less than 60 years of age, with 0-11 years' follow-up, it is found that cemented cups had better survival than uncements porous-coated cups, mainly because of higher rates of revision from wear and osteolysis among the latter.
Journal ArticleDOI
Structural analysis of hydroxyapatite coatings on titanium.
TL;DR: Depending upon the deposition conditions various changes in the structure of the ceramic were identified and Hydroxyapatite oxygenated to various degrees and tetracalcium phosphate were reproducibly formed in the coating.