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The purpose of this study is to develop a new ultrasound diagnostic system for non-invasive and quantitative assessment of mechanical properties of the bone or bone healing. In the previous papers, we reported that we had developed a new ultrasound system to measure a minute bone deformation using a multi-point echo-tracking (ET) and that it had a great potential for non-invasive and quantitative...
For femoral fracture reduction, we have developed a surgical robotic system. Indirect traction is employed in our system. Indirect traction in fracture reduction is a generally used surgical method for preventing complications such as bone splits caused by high stress on bones. For traction, a patientpsilas foot is gripped by a jig and pulled to the distal side. Indirect traction has the advantage...
In the previous paper, we reported that an ultrasound system using multi-point echo-tracking (ET) could have a great potential for non-invasive and quantitative diagnosis of bone healing. In this study, the results of a clinical evaluation of the previous method were reviewed and we further improved the ET system to obtain the higher accuracy. The objective of this study was to develop a new ultrasound...
In medical diagnostic imaging, an X-ray CT scanner or a MRI system have been widely used to examine 3D shapes or internal structures of living organisms or bones. However, these apparatuses are generally very expensive and of large size. A prior arrangement is also required before an examination, and thus, it is not suitable for an urgent fracture diagnosis in emergency treatment. This paper proposes...
To evaluate bone strength, it is significant to measure the degree of deformation or strain of bone under a certain load. However no method has been available to non-invasively measure bone deformation. To obtain bone mechanical properties such as elasticity, viscoelasticity and plasticity, we need to externally apply a load to a bone and to accurately measure the small displacement of a specific...
Automatic immediate fitting socket (AIFS) system was developed to shorten the long length of time for making an artificial leg, by applying powder technology. AIFS is constructed of an outer shell, a particle containing bag, which the rigidity can be controlled by the application of negative air pressure and three airbags between the outer shell and the particle bag to adjust the shape by controlling...
Based on the fact that the klotho-deficient mouse exhibits multiple aging phenotypes, including osteopenia and subchondral sclerosis of joints, we explored the possibility of whether human klotho gene polymorphism is associated with two major age-related skeletal disorders: osteoporosis and spondylosis. Analysis of the CA repeat sequence downstream of the final exon of the klotho gene identified ten...
The present study was undertaken to evaluate the effects of combined treatment with intermittent cyclical etidronate and daily alfacalcidol on the mass and the mechanical properties of bone in ovariectomized rats, and to compare the effects with those of single treatments. Seventy 14-week-old female rats underwent ovariectomy (ovx) or sham operation, and were assigned to seven groups (n = 10 each):...
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