Endoprosthetic implants

Gas detonation spraying of hydroxyapatite yielded thick coatings with remarkable properties (Klyui et al., 2011). The coating thickness reached during only 20 s of spraying was 280 pm. Adhesion strength to a titanium substrate was up to 80 MPa, and no decomposition phases were observed by XRD. The stems of hip endoprosthetic implants and acetabular cups as well as dental implants... 

The properties and functions of biomaterials-and in particular of bioceramics - are frequently discussed in the context of hip endoprosthetic implants. Hence, this chapter will focus on the most commonly utilized bioceramic materials such as alumina, stabiHzed zirconia (Y-stabiHzed Tetragonal Zirconia Polycrystal Y-TZP), and calcium phosphates (notably hydroxyapatite), all of which are compo-... 

Previously, attempts have been made to reduce the stiffness differences between the implant and bone by using isoelastic implants. In this case, a sheath of polymer surrounds the metallic shaft of a hip endoprosthetic implant, the aim being to provide a smooth gradient of the modulus of elasticity. Unfortunately,... 

The efficient sterilization of metallic and ceramic femoral heads before surgical implantation is an important requirement to guarantee a successful integration of an endoprosthetic implant (Kowalski and Morrisey, 1997). Since the hydrolytic... 

The number of patients receiving biomedical endoprosthetic, dental and other implants to correct skeletal defects and heal diseases are constantly on the rise worldwide. A rough estimate of metallic, ceramic and polymeric implants of all kinds delivered worldwide to patients are in the range of 10 million annually. Consequently, the number of orthopaedic surgeries worldwide is growing by 10-12% per year (Tomsia et al., 2005). 

The mechanical performance of femoral heads and acetabular cups made from alumina have been the subject of intense research and development effort as it is crucial for the longevity of the endoprosthetic hip implant. Hence, the failure probability of these ceramic construction parts has been investigated and expressed by the Weibull probability density function. As safe design of... 

Calcium (Titanium, Zirconium) Orthophosphate Coatings Calcium (titanium, zirconium) orthophosphate ceramics display solubility in SBF at least 1 order of magnitude lower than that of other calcium orthophosphates including hydroxyapatite and, in particular [3-TCP and TTCP (Figure 4.20). Such very stable implant coatings may be utilised in special cases when during an endoprosthetic... 

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