Download Advanced materials for joint implants by Giuseppe Pezzotti PDF

By Giuseppe Pezzotti

Based on an interdisciplinary strategy that at once bridges orthopedic thoughts to floor technology, this ebook info state of the art study in bioceramics technology, actual chemistry, biomedical optics, and nanomechanics. The ebook cites many of the extra traditional spectroscopic characterization techniques—including Raman and cathodoluminescence spectroscopy. those suggestions were used to unveil molecular scale phenomena of either chemical and mechanical beginning taking place on the sliding surfaces of bioceramic joints. those innovations are of serious value to researchers as they're correct to the improvement of latest biomaterials.

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Additionally, the axiom “a chain is as strong as its weakest link” may explain in what it might consist the striking vulnerability of the overall artificial joint implant to the brittleness of its ceramic parts or to the proneness to oxidation (and subsequent wear) of internal polyethylene surfaces. In other words, the macroscopic performance (and lifetime) of the overall artificial joint ultimately depends on phenomena occurring on the molecular scale and no substantial improvement is possible without understanding the microscopic mechanisms governing the physical, mechanical, and chemical interactions between the biomaterial and the human body environment.

These latter two characterization methods are important because they provide direct outputs about the intrinsic structural resistance of joint biomaterials when loaded under extreme environmental conditions. 2 Atomic Force Microscopy The AFM device can be considered a modern and highly technological update of the more traditional stylus profilometer. In its original version, the stylus profilometer employs a sharp cantilever-mounted probe affixed with a mirror to magnify surface profile features onto photographic paper.

Benninghoff introduced the partition of articular cartilage into different layers or zones and used polarized light microscopy to examine the orientation of collagen fibers in human articular cartilage. The most external zone, which represents up to 10~20% of the full thickness of articular cartilage, also experiences a strong degree of orientation in the plane of articulation sliding and a highly interconnected (crosslinked) structure. , fully vertical to the 13 14 General Introduction plane of sliding) orientation in the bulk zone.

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