title: Histology of tissue adjacent to an HAC-coated femoral prosthesis. A case report.
abstract: We studied the fixation of a cementless titanium femoral prosthesis partially coated with hydroxyapatite ceramic (HAC) 10.4 months after implantation. Histomorphological investigation showed extensive new bone formation between the HAC coating and the bone bed; morphometry showed bone contact indices of up to 91.60%. There were a number of resorption lacunae on the HAC coat with depths of up to 76.6 microns and widths of up to 453 microns. Our results confirmed that considerable bone remodelling had taken place and that the apatite-coated prosthesis had united with bone despite the lack of appreciable immediate press-fit. Hydroxyapatite particles which had been released did not appear to show any negative effects on the stability of the implant.
authors.affiliation: Baumgartner Höhe Institute of Pathological Bacteriology, Vienna, Austria.
authors.forename: F
authors.initials: F
authors.lastname: Lintner
authors.forename: G
authors.initials: G
authors.lastname: Böhm
authors.forename: M
authors.initials: M
authors.lastname: Huber
authors.forename: R
authors.initials: R
authors.lastname: Scholz
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D016723:Bone Remodeling; D001862:Bone Resorption / Q000209:etiology / Q000473:pathology* / Q000503:physiopathology; D002516:Ceramics; D017886:Durapatite; D005260:Female; D005265:Femoral Neck Fractures / Q000473:pathology* / Q000503:physiopathology / Q000601:surgery; D006622:Hip Prosthesis / Q000009:adverse effects / Q000295:instrumentation*; D006801:Humans; D011183:Postoperative Complications / Q000209:etiology / Q000473:pathology* / Q000503:physiopathology; D019736:Prostheses and Implants; D011474:Prosthesis Design; D013499:Surface Properties; D014025:Titanium
chemical_list: D017886:Durapatite; D014025:Titanium