Plasma-sprayed coatings of tetracalciumphosphate, hydroxyl-apatite, and ?-TCP on titanium alloy: An interface study
✍ Scribed by Klein, Christel P. A. T. ;Patka, P. ;van der Lubbe, H. B. M. ;Wolke, J. G. C. ;de Groot, K.
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 668 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0021-9304
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✦ Synopsis
In order to study the interaction of calcium phosphate coatings with bone tissue, coated titanium cylinders with a standard size were implanted in dog femora. Coatings were made by plasma spraying powders of hydroxylapatite, P-whitlockite, and tetracalciumphosphate particles. The plasma spraying process tuns P-whitlockite into a-TCP. Bone bonding and bone formation were evaluated by mechanical push-out tests and histological observations. I-lydroxylapa-tite and tetracalciumphosphate coatings show an interface strength after 3 months of implantation of 34.3 f 6.5 MPa and 26.8 2 3.9 MPa, respectively, while a-TCP and blanco titanium lead to an interface strength of 10.0 2 3.5 MPa and 9.7 +_ 1.3 MPa, respectively. Histological examinations revealed that hydroxylapatite and tetracalciumphosphate give rise to an excellent bone formation, while a-TCP and blanco titanium evoked remodeling and less bone contact.