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Dual Energy X-ray Absorptiometry (DXA) is a tool that allows the assessment of bone
density. It was first presented by Cameron and Sorenson in 1963 and was approved by the Food
and Drug Administration. Misplacing the femoral neck box, placing a trochanteric line below the
midland and improper placement of boundary lines are the most common errors made during a DXA
diagnostic test made by auto analysis. Hydroxyapatite is the most important inorganic component
of teeth and bone tissue. It is estimated to constitute up to 70% of human bone weight and up to
50% of its volume. Calcium phosphate comes in many forms; however, studies have shown that
only tricalcium phosphate and hydroxyapatite have the characteristics that allow their use as bone-
substituted materials. The purpose of this study is aimed at analyzing the results of hip densitometry
and hydorxyapatite distribution in order to better assess the structure and mineral density of the
femoral neck. However, a detailed analysis of the individual density curves shows some qualitative
differences that may be important in assessing bone strength in the area under study. To draw more
specific conclusions on the therapy applied for individual patients, we need to determine the correct
orientation of the bone from the resulting density and document the trends in the density distribution
change. The average results presented with the DXA method are insufficient.