𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Features of calcium phosphate plasma-sprayed coatings: Anin vitro study

✍ Scribed by Klein, C. P. A. T. ;Wolke, J. G. C. ;de Blieck-Hogervorst, J. M. A. ;De Groot, K.

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
654 KB
Volume
28
Category
Article
ISSN
0021-9304

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Factors involved with the plasma‐spray coating procedure, such as starting powder compound (fluorapatite, hydroxylapatite, magnesium‐whitlockite, or tetra‐calcium phosphate), powder particle distribution 1–45 or 1–125 (μm), powder port gun (port 2 or 6), and post–heat treatment of 1 h at 600°C, were examined for their effects on crystallinity and solubility/stability of the coating. From solubility tests, X‐ray diffractometry, and scanning microscopy studies, the solubility and crystallinity were found to be dependent on Ca/P ratio, particle distribution, and post‐heat treatment. The post‐heat treatment influenced the degree of both crystallinity and solubility. The plasma‐spray powder port factor for the hydroxylapatite coatings was not significant. Incubation in buffer of the coatings introduced precipitation at the surfaces of all non–heat‐treated coatings except fluorapatite. No precipitation could be observed in any of the heat‐treated coatings. © 1994 John Wiley & Sons, Inc.

📜 SIMILAR VOLUMES

Calcium phosphate plasma-sprayed coating
Calcium phosphate plasma-sprayed coatings and their stability: Anin vivo study
✍ Klein, C. P. A. T. ;Wolke, J. G. C. ;De Blieck-Hogervorst, J. M. A. ;de Groot, K 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 882 KB

Several factors playing a possible role in determining coating stability and bone tissue response were studied in in vivo experiments. These factors involving the plasmaspray coating procedure were as follows: 1) plasmaspray powder port 2 or 6; 2) particle size distribution; 3) hydroxylapatite versu

X-ray diffraction studies on plasma-spra
X-ray diffraction studies on plasma-sprayed calcium phosphate-coated implants
✍ Koch, B. ;Wolke, J. G. C. ;de Groot, K. 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 782 KB

Calcium phosphate coatings on steel, obtained by the plasma-spray technique, were examined by x-ray diffraction in order to get some information on their crystallographic structure and crystallinity. Surface roughness values were also determined. These coatings are of interest for hip-prosthesis mat

Analytical and mechanical testing of hig
Analytical and mechanical testing of high velocity oxy-fuel thermal sprayed and plasma sprayed calcium phosphate coatings
✍ Haman, Jeannie D. ;Chittur, Krishnan K. ;Crawmer, Daryl E. ;Lucas, Linda C. 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 67 KB

Plasma spraying (PS) is the most frequently used coating technique for implants; however, in other industries a cheaper, more efficient process, high-velocity oxy-fuel thermal spraying (HVOF), is in use. This process provides higher purity, denser, more adherent coatings than plasma spraying. The pr

X-ray determination of crystalline hydro
X-ray determination of crystalline hydroxyapatite to amorphous calcium-phosphate ratio in plasma sprayed coatings
✍ Keller, Ludwig ;Dollase, W. A. 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 188 KB 👁 2 views

A method to measure the amorphous calcium phosphate (ACP) content of plasma sprayed hydroxyapatite (HA) coatings is presented. The areas of the crystalline peaks and the broad amorphous "hump" in an X-ray diffraction scan of a mixture of crystalline and amorphous HA can be fitted using conventional

Biological activities of sustained polym
Biological activities of sustained polymyxin B release from calcium phosphate biomaterial prepared by dynamic compaction: Anin vitro study
✍ Kimakhe, Sa�d ;Bohic, Sylvain ;Larrose, Catherine ;Reynaud, Alain ;Pilet, Paul ; 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 326 KB

Calcium phosphate ceramics (CaP) have recently been proposed as a potential matrix for a bioactive drug delivery system (DDS) in which the effect in situ of a released therapeutic agent is favored by the biocompatibility, osteoconductivity, and bioresorption of the ceramic material. Polymyxin B (PMB