Osteonecrosis Staging Systems
Total Knee Tips & Pearls From Dr. Adam Rosen (A Virtual Total Knee Fellowship Podcast)
English - January 23, 2021 08:00 - 9 minutes - 6.28 MB - ★★★★★ - 4 ratingsMedicine Health & Fitness knee total knee total knee arthroplasty total knee replacement ortho virtual fellowship tka surgery fellowship adam rosen Homepage Download Apple Podcasts Google Podcasts Overcast Castro Pocket Casts RSS feed
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Here I review the two common classifications for ON of the hip, Ficat and Steinberg.
The modified Ficat, Idiopathic bone necrosis of the femoral head, was published in 1985 JBJS-Br
0 - Preclinical and pre-radiographic
I - Xray is normal but hip is symptomatic
II - sclerosis and cysts on xray
III - Crescent sign
IV - OA with a deformed head
Steinberg, A quantitative system for staging avascular necrosis, JBJS-Br 1995
0 - Normal
1 - Xray normal, BS +, MRI +
2 - sclerosis and cysts on x-ray
3 - crescent sign
4 - flattening of the femoral head
5 - joint space narrowed without acetabular involvement
6 - advanced DJD
for stages 1 - 5 he further describes volume of involvement
mild <15%
moderate 15% - 30%
severe > 30%