rect violence——low energy damage?Young adults: indirect violence——high energy damage?nonunion10%-20%( shear force greater ),AVN20%-40%(Blood supply)Рfemoral neck anteversionРThe axis of the femoral neck and femoral coronary forming Angle,12°~15°РAnatomyР① Small artery :Femoral head round ligament ,1/20?②shaft of the femur;nutrient artery?③ the artery ring on the fundus of neck of femur : medial femoral circumflex artery; lateral femoral circumflex artery?;The main source , 2/3 - 4/5РAnatomyРBlood supplyРBlood supplyРAnatomyРmedial femoral circumflex artery---AVN the main factorРthe artery ring on the fundus of neck of femurРAccording to the locationРclassificationРfracture lines closer to the femoral head?Rich blood supply?Poor blood supply---rate of the necrosisРFracture end;Contact area
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