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Objective:To evaluate the influence of osteoporotic hip fractures on geometric structure of the proximal femur,to study the influence of hip geometry on bone mineral density and its value in predicting osteoporotic hip fractures.Material and methods: the 233 cases had been examined by dual energy X-ray absorptiometry(DXA) and their measurements were collected. There are 46 cases in the group of hip fresh osteoporotic fracture , 19 men,27 women, age 67.9±8.4,height 161.2±8.3cm,weight 55.3±7.6kg; the control group,187 cases, 73 men,114 women, age 65.9±8.9,height 159.4±9.1cm,weight 56.1±9.3kg. The control group are divided into three group: normal, osteopenia and osteoporosis. Measure the uninjured hip of fracture group and left of control group by Osteocore 3 DXA(made in France) and senior orthopaedic special analysis tool, obtain the bone mineral density(BMD) and geometric structure of proximal femur, include femoral neck axis length(FNAL), femoral neck angle(FNA), medial offset(MO), neck length(NL).Results: The length of femoral neck axis , neck and medial offset in the hip fracture group are longer (p<0.05)than the control ones, but the femoral neck angle is smaller(p<0.05).There are significantly difference between the two groups.Conclusions: The geometric structure difference of FNAL、FNA、MO、NL may add the load to proximal femoral, which can increase the risk of the hip fracture. Screening the osteoporosis patients with anomalous PFG and taking preventive measures and treatment are important to reduce the risk of hip fractures.
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