Abstract
Hip arthroplasty in elderly patients is the most progressive method of medical treatment. The method provides rapid recovery and rehabilitation of musculoskeletal systems at an earlier period. The aim of the present study was to analyze the structural and mechanical properties of unipolar prosthesis head surfaces made of titanium and stainless steel and coated by oxide and oxynitride nanocomposite for hemiarthroplastic hip replacement as well as clinical approbation of prostheses «BES-T Manufacturing» (Ukraine), for possibility of applying this technology in traumatology. The structure of Al2O3 (MS) and AlN/ Al2O3 (MS) magnetron sputtered films was investigated by means of XPS and XRD methods. The surface topography and roughness was estimated by profilometer Hommel T-2000 measurements and by AFM method. ElvaX spectrometer is modern analytical equipment for high-line non-destructive elemental analysis. The analysis of the results of treatment patient’s with fractures of the femoral neck under observation period from 12 months to 3 years was presented. The unipolar hip replacement operations were made in urban trauma hospital during the period from 2012 to 2014. The age of patients was in the range from 72 to 86 years. All patients had a history of intra-articular fractures of the femoral neck. The joint femoral head surfaces with nanocomposite oxide and oxinitride coatings demonstrate improved biocompatibility due to wettability increasing and fluid friction characteristics advancing. The deep understanding of the tribology of artificial joints is essential for reducing wear and corrosion of modern prostheses. Deposition of ceramic coatings on a surface of metal artificial joint’s head is an effective way to advance the functional characteristics of unipolar and bipolar prosthesis for joint arthroplasty.
Highlights
The total replacement of hip-femoral joints is a successful, safe and cost-effective clinical treatment in modern medicine practice [1,2,3]
Titanium head unipolar hip replacements are unstable to mechanical loading
In place of the maximal loads «metal-cartilage», «metal-bone» is an active transfer of the metal ions into the surrounding tissues
Summary
The total replacement of hip-femoral joints is a successful, safe and cost-effective clinical treatment in modern medicine practice [1,2,3]. Femoral neck fractures are a common insufficiency fracture in the elderly. The ageing of population requires new advancing strategies of patient’s treatment. The most common medical indication for surgery operation is advanced osteoarthritis, a degenerative joint disease, and loss of mobility functions. Other factors are various bone defects caused by accidents or diseases. At the process of the femoral head arthroplasty the most important is the evaluation of patient’s anatomical features for enhancement of tribological parameters of modular joints. The principal advantage of modular prosthesis application is the possibility of revision operation in the case of significant migration of joint femoral head to pelvis. The long-term experience of different patience group’s research demonstrates high survival parameters under medical observations above 20–30 years [4,5,6,7,8]
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