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Home List of Titles Structural changes of plasma sprayed hydroxyapatite coatings during in-vitro testing
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41592
- Structural changes of plasma sprayed hydroxyapatite coatings during in-vitro testing
- Gross, Karlis A.; Berndt, C. C.
- The in-vitro behavior of hydroxyapatite (HAp) coatings depends on the thermal history of the coating after thermal spraying. As-sprayed amorphous coatings degrade in Ringer's solution. Heat treatment at 800°C for 2 hours produces a crystalline coating which upon immersion in physiological solution displays a greater stability. Coatings are characterized for surface morphology, composition, crystallinity, roughness, and weight loss. The as-sprayed coating shows changes in the coating morphology with immersion time. Individual lamellae crack and separate from the coating. Those lamellae still intact show evidence of dissolution. After a period of 8 weeks small HAp spheres cover the surface of the as-sprayed and heat treated coatings. These morphological changes are expected to influence the rate of bone bonding. Therefore post-treatment of HAp coatings is seen as a technique to alter or control implant tissue interactions.
- Publication type
- Conference paper
- Characterization and performance of calcium phosphate coatings for implants: Papers presented at a symposium sponsored by ASTM Committee F-4 on Medical and Surgical Materials and Devices, Miami, Florida, United States, 17 November 1992 / Emanuel Horowitz and Jack E. Parr (eds.), pp. 124-139
- Publication year
- Ceramic coatings; Crystalline materials; Degradation; Hydroxylapatite; Implant tissue interactions; Invitro testing; Lamellae cracks; Microstructure; Plasma spraying; Ringer solution; Surgical implants
- 9780803118546, 0803118546
- Publisher URL
- Peer reviewed