By Saverio Affatato
Total hip arthroplasty, the main usually played orthopedic technique, is used to exchange or reconstruct the hip with a synthetic joint. Perspectives in overall Hip Arthroplasty outlines advancements in applied sciences and biomaterials used for this method, with a spotlight at the tribological interactions of the fabrics used.
Part one outlines the historical past of overall hip arthroplasty and is going directly to discover advances in thoughts and biomaterials. half specializes in the tribology of fabrics used to accomplish this technique, explaining the impression of damage at the load-bearing floor, a huge reason for failure in hip prostheses. Chapters evaluation quite a number fabrics, together with sleek biomaterials, hybrid fabrics, steel, ceramic, and polyethylene. The ebook additionally discusses the tribological interactions of those fabrics whilst utilized in overall hip arthroplasty.
Perspectives in overall Hip Arthroplasty is a key source for clinicians, researchers, and teachers drawn to the tribology of overall hip arthroplasty, in addition to fabrics researchers, engineers, and lecturers desirous about the tribology of biomaterials.
- Covers ideas from leading edge surgeons and designs from multinational brands, in addition to info on advancements in applied sciences and biomaterials
- Discusses the tribology of the entire significant fabrics utilized in overall hip arthroplasty
Read or Download Perspectives in Total Hip Arthroplasty: Advances in Biomaterials and their Tribological Interactions (Woodhead Publishing Series in Biomaterials) PDF
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Additional info for Perspectives in Total Hip Arthroplasty: Advances in Biomaterials and their Tribological Interactions (Woodhead Publishing Series in Biomaterials)
5, have been taken into consideration again after the development of new designs and surface finishing techniques, which reduce the wear problem that caused them to be discontinued in the 1970s. 4 Typical configuration of a MOP hip bearing system. 5 MOM hip bearing system configuration. 6 COC hip bearing system configuration. , 2011). In addition, the reduced brittleness of the materials allows the creation of femoral heads with a larger diameter, which increases joint stability. , 2011). COC bearings show high levels of hardness and scratch resistance and have excellent lubrication properties.
It has a tensile strength of 900 to 1000 MPa and its fatigue resistance at 107 cycles is 600 to 700 MPa. The lower elastic modulus (110 GPa), compared to stainless steels and Co-Cr alloys, allows less incisive stress distribution in the surrounding peri-implant bone. For this reason, cement fixation is less important when a titanium alloy implant is used. In addition, to ensure fixation by micro-mechanical interlocking due to bone in-growth, porous-coated implants are often used. TiAl6V4 offers better corrosion resistance than the other metals used in hip joint replacements.
Another trial was carried out by Barber et al. (1996), where 28 THRs done via the posterior approach were compared with 21 that were operated on using a direct lateral approach (cemented and uncemented implants were used for various proportions of each group). On the second day after the operation, protected weight bearing was introduced to patients in both groups. The data collected related to the internal rotation of the extended hip joint and showed substantial differences between the two approaches.