American Academy of Orthopedic Surgeons Classification of Periprosthetic Hip Fractures

The American Academy of Orthopedic Surgeons classification of periprosthetic hip fractures divides the femur into three separate regions: level I: proximal femur distally to the lower extent of the lesser trochanter. level II: 10 cm of femur distal to level I. level III: femur distal to level II. There are several types of fracture managing methods for classifying, investigating the fracture pattern, severity, degree, location, type, angulation, shortening – lengthening, comminution, rotation, displacement, the status of the femoral implant, the quality of surrounding femoral soft tissue injury and fracture angle are universally and widely accepted by orthopedic surgeons to assess the initial injury, plan management, and predict prognosis, to manage decision making, in determining whether a fracture requires an intramedullary nail or open reduction with internal fixation with steel screws, rods, plates, pins, or K-wires to hold the broken bones in the correct position even external fixation attaches a metal framework outside the limb and includes the Ilizarov method and an X-frame.

 

The American Academy of Orthopedic Surgeons classification of periprosthetic hip fractures divides the femur into three separate regions:

• level I: proximal femur distally to the lower extent of the lesser trochanter
• level II: 10 cm of femur distal to level I
• level III: femur distal to level II

Fractures are classified accordingly:

• type I: fractures proximal to the intertrochanteric line; usually occur during dislocation of the hip
• type II: vertical or spiral fractures that do not extend past lower extent of the lesser trochanter
• type III: vertical or spiral fractures that extend past lower extent of lesser trochanter, but not beyond level II; usually at the junction of middle and distal thirds of the femoral stem
• type IV: fractures that traverse femoral stem in level III or lie within that area
  • type IV-A: spiral fractures around the tip of the stem
  • type IV-B: simple transverse or short oblique fractures
• type V: severely comminuted fractures around the stem in level III
• type VI: fractures distal to the tip of the stem in level III

or

American Academy of Orthopedic Surgeons (AAOS) classification
Type I	fractures proximal to the intertrochanteric line; usually occur during dislocation of the hip
Type II	vertical or spiral fractures that do not extend past the lower extent of the lesser trochanter
Type III	vertical or spiral fractures that extend past the lower extent of the lesser trochanter, but not beyond level II; usually at the junction of middle and distal thirds of the femoral stem
Type IV	fractures that traverse femoral stem in level III or lie within that area type IV-A: spiral fractures around the tip of the stem type IV-B: simple transverse or short oblique fractures
Type V	severely comminuted fractures around the stem in level III
Type VI	fractures distal to the tip of the stem in level III

References

Show More