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The paper presents the design and construction of an experimental stand for in vitro testing of total hip and knee prosthetics. It is composed of a pneumatic circuit (two pneumatic cylinders, a rack-piston oscillating motor), an electric circuit (an electric motor of 24 V DC, a power source, a command and control circuit), a device for cycles number counting, sensors for acceleration, rotational speed...
The paper presents a study in vitro concerning the deviation from sphericity of some components of total hip prosthesis (acetabular cups and femoral heads). Prosthesis have been tested on an experimental stand, on which were simulated the loads and movements from coxo-femoral articulation. Deviation from sphericity was determined in accordance with ASTM standards and specifications from the ISO on...
Biomechanical measurements of anticipatory postural adjustments (APAs) at gait initiation were performed in subjects affected by Parkinson's disease and in medication-off condition. Patients were compared with a selected group of healthy control subjects matched by velocity of the first step and comparable initial feet position. The obtained results evidenced alterations in the unloading phase, when...
Very strong recent researches offer details about pelvic asymmetry and its pattern of growth. Asymmetric growth of the ilium bone from birth to adolescence and its statistical incidence besides asymmetric growing of other bodies' parts incidence impose the necessity to design a simple test for the risk of scoliosis due to pelvic or sacroiliac asymmetric disorders. The pelvis area is the base support...
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