2 | TROCHANTERIC FRACTURE CLASSIFICATION
There are many different classifications of the trochanteric fractures,
where we use the AO or Muller classification, which most studies have
used.
Type A1: Pertrochanteric fractures are simple with 2
fragments. (Figure 1)
- Type A1.1:
Pertrochanteric
fractures, small displaced.
- Type A1.2: Pertrochanteric fractures, with wide displacement at
greater trochanter.
- Type A1.2: The fracture line has spread to lesser trochanter.
Fracture type A2 : Pertrochanteric fractures are
multi-fragmentary. (Figure 1)
- Type A2.1: Detachment of the lesser trochanter.
- Type A2.2: Several intermediate fragments including detachment of the
lesser trochanter.
- Type A2.3: Several intermediate fragments extending more than 1 cm
distal to the lesser trochanter.
Type A3: Intertrochanteric fractures all have a fracture
line through the lateral femoral wall. (Figue 3)
- Type A3.1: simple fracture, reverse oblique fracture line.
- Type A3.2: Simple fracture, transverse line.
- Type A3.3: Simple transverve line with medial detached fragment.