Abstract
Fifty two patients with dysplastic coxarthrosis, aged 14-23, were examined using dual photon X-ray absorptiometry. Changes in bone mineral density had fluctuating pattern. On the base of experimental data a calculating experiment was performed. It showed that coincidence of trend direction obtained at random with true tendency defined by approximation of all dynamic row was only 58% in reiterated examination, 63% - in thrice-repeated examination and 69% - in five -times examination. Hence, even five-times examination is not enough for the exact diagnosis of metabolic disturbances of bone tissue and objective control of the effective treatment and more examinations are required.
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