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  • 1
    ISSN: 0003-2697
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archives of orthopaedic and trauma surgery 105 (1986), S. 55-61 
    ISSN: 1434-3916
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The Bateman hip prosthesis was applied in reconstruction of secondary osteoarthritis and rheumatoid arthritis. Forty-five joints that could be followed up for 45–18 months (mean 26 months) were clinically and roentgenographically re-examined. Forty joints (90.0%) were painless. The clinical score improved from the preoperative mean of 44.8 to the postoperative mean of 87. In 34 patients with secondary osteoarthritis, postoperative protrusion of the outer head into the acetabulum reconstructed by excavation of the previous shallow, steep architecture was only 0.8 mm (mean). Postoperative protrusion of the outer head into the acetabulum reconstructed by bone grafting was only 2.0 mm (mean) in 11 patients with rheumatoid arthritis. Roentgenograms revealed the appearance of sclerosis supermedially in the excavated acetabulum 4–6 months after the operation. This sclerotic change expanded in the entire area of contact with the outer head in 36 of 45 joints within about 1 year. Once the sclerosis had spread completely, the outer head stopped protruding into the acetabulum. A computerized simulation experiment with a rigid spring model demonstrated that central displacement of the outer head can be avoided if the continuity between the sclerosis in the articular surface of the reconstructed acetabulum and the lateral wall is restored for transmission and dispersion of the resultant head force toward the lateral wall as in normal hip joints; this verified the clinical findings.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Mammalian genome 8 (1997), S. A944 
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Mammalian genome 7 (1996), S. 706-707 
    ISSN: 1432-1777
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 29 (1995), S. 19-24 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: We performed a transcortical push-out test to determine the effect of surface roughness of hydroxyapatite (HA)-coated implants on bone-implant shear strength in a canine model. Hydroxyapatite- and alumina-coated SUS316L with the same surface roughness (roughness average: Ra = 5 μm) and HA-coated Ti-6Al-4V (Ra = 8.4 μm), sintered HA (Ra = 0.9 μm), and dense alumina (Ra = 1.3 μm) were inserted into the dog's femur. The interface shear strength of the dense alumina was significantly lower than that of other implants at both 4 and 12 weeks after implantation. At 4 weeks after implantation, the interface shear strength of the alumina-coated SUS316L was significantly lower than that of other implants (P 〈 .05) except the dense alumina, but at 12 weeks, there was no significant difference between the implant types except the dense alumina. This indicates that the surface roughness of the HA coating affects the enhancement of the bone-implant interface shear strength at the early period after implantation, and that a surface roughness of several micrometers does not influence the bond strength between bone and HA. A scanning electron microscopic study indicated that in almost all cases at 12 weeks, the failure site after push-out testing was the coating-substrate interface, not the coating-bone interface. Therefore, protection of the coating-substrate interface from direct shear loading is needed. © 1995 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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