Changed Of Proximal Femur Geometry In The Intertrochanteric Fracture Of Elderly Osteoporos Treated By PFNA

ObjectiveTo study whether the upper femur geometrical parameters have changed in the intertrochanteric fracture of elderly osteoporosis after healing treated by proximal femoral nail anti-rotation. Moreover, exploring the reasons for this change and mechanism of fracture healing.Methods30 patients with intertrochanteric fracture of elderly osteoporosis were followed up, including13 male,17 female.proximal femur geometrical parameters and singh index were measured on pelvic plain film after operation and fracture healing (0.5-2 years later). The results were given comprehensive analysis and statistical processing.ResultsAll the patients, who had the below grade IV in Singh value, were followed up. There were statistically significant differences between after operation and fracture healing with all proximal femur geometrical parameters, including top-high-pitch, neck-shaft angle, proximal length. There was statistical signi-ficant of top-high-pitch in difference of Singh values and age. meanwhile, the correlation analysis between the geometric parameters had no noticeable statistically significance.ConclusionThe proximal femoral bone density and geometry were constantly changing or redistribution in healing process of intertrochanteric fracture of elderly osteoporosis by proximal femoral nail anti-rotation. The proximal femur geometrical parameters,which can help to promote fracture healing in the acceptable range. Moreover, this therapy achieved the TCM of relatively static fixation and dynamic healing. For the treatment of intertrochanteric fracture of elderly osteoporosis, The theory of combination of static and dynamic may be a better way in treating this fracture.