文档介绍：Femoral Neck Fractures---a changing paradigm
Department of Orthopaedics---Mangmang Chen
Definition
1 one of the monly treated orthopaedic injuries,%
2 increasing number of femoral neck fractures.
Longer lifespan of patients
Increased activity of patients
Osteoporosis
3(这里可以放一些图片)
Demographics:
Most >75y
Over 1 million femoral neck fractures were treated in the
>65 year old population in the US
Between 1991-2008.
(有一张图片最好,地图分布图)
Hip Fractures:Demographics
Very heterogeneous patient population
Can ranger from independent mobile,healthy elderly patients
Vary degress of dementia(1分38的时候看不懂)
110°~140°,average 127° 。
>140 ° coxa valgus
<110 ° coxa vara
Anatomy
Collodiaphysial angle
Axis…
Anatomy
Collodiaphysial angle
Axis…
Elderly people:indirect violence——low energy damage
Young adults: indirect violence——high energy damage
nonunion10%-20%( shear force greater ),AVN20%-40%(Blood supply)
femoral neck anteversion
The axis of the femoral neck and femoral coronary forming Angle,12°~15°
Anatomy
① 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 - 4/5
Anatomy
Blood supply
Blood supply
Anatomy
medial femoral circumflex artery---AVN the main factor
the artery ring on the fundus of neck of femur
According to the location
classification
fracture lines  closer to the femoral head
Rich blood supply
Poor blood supply---rate of the necrosis
Fracture end;Contact area