Abstract：Objective To investigate the clinical features and treatment of distal femur fractures in elderly osteoporosis patients.Methods A retrospective analysis was made for 15 cases of distal femur fractures in elderly osteoporosis from March 2010 to February 2014，comprising of 6 male and 9 female with an average age of 69.6 years (ranged 65 to 77 years).According to AO classification，10 cases were of type C2 and 5 of type C3.All patients were treated by stageⅠof bone graft procedures combined double-lock plating fixation via anteriormiddle approach.After operation，they were intervened by anti-osteoporosis treatment and functional exercise and guidance.All cases were followed up regularly and performed X-rays.The function of affected knee was evaluated at the end of the follow-up.Results The distal femur fractures in elderly osteoporosis patients was displacement and comminuted.The bone cortex of distal femur was visible thin while the cancellous bone was sparse.And there was serious bone defect which was more severe than that of preoperative imaging evaluation.With follow-up time of 12～18 months (average 13.7 months )，all patients got bone-healing during 12 weeks to 28 weeks (average 18.3 weeks ).According to knee functional evaluation，6 cases were excellent，8 good and 1 fair.The total excellent and good rate was 93.3％.Conclusion The distal femur fractures in elderly osteoporosis patients were much more complex.The surgery of stageⅠof bone graft procedures combined double-lock plating fixation via anteriormiddle approach is an effective way for them，which has advantages of obvious exposure，early stable fixation and support and less complication.
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