Analysis of Retrieved Hydroxyapatite-Coated Hip Prostheses

摘要: Hydroxyapatite (HAp) coatings are used extensively on orthopaedic devices to improve the adhesion of bone prosthesis. This approach increases integrity and longevity implanted Four HAp-coated hip components recovered from patients during revision surgery were investigated for attachment coating modification after storage in ethanol or formaldehyde. Orthopedic displayed preferable microtextured areas little smoother areas. The microstructure differed between three that remained prosthesis surface, ranging completely crystalline made by vacuum plasma spraying less manufactured air spraying. Coating failure lower crystallinity was observed a crack at interface possibly caused dissolution an amorphous phase. While higher degraded delamination, produced loose particulate outer surface. morphology as scanning electron microscopy (SEM) lamellae fracture, chemical dissolution, osteoclastic resorption, precipitation agreement with previously identified in-vitro events. appeared be extended those subject levels stress more coverage.