Tower and Beals listed a classification for femoral fracture after a total hip replacement. The authors are Oregon Health Sciences University in Portland.
Fracture Location
Features
Type
proximal femur
often avulsion of the lesser or greater trochanter
I
diaphysis of the femur
about the prosthesis but not at the stem tip
II
diaphysis of the femur
fracture about stem tip, fracture does not propagate proximally with less than 25% of the bone-prosthesis interface disrupted
IIIA
diaphysis of the femur
fracture about stem tip, fracture propagate proximally with more 25% of the bone-prosthesis interface disrupted
IIIB
supracondylar fracture
adjacent to the tip of a long-stemmed femoral component
IIIC
supracondylar fracture
distal and distant to the tip of the prosthesis
IV
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