Welcome to Classifications and Online Calculators in Radiology
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Dislocation in acromioclavicular joint - Tossy classification of AC dislocation
Tossy classification divides dislocations in AC joint into three grades. It was later extended by Rockwood et al. by another three types. Normal width of AC joint is considered 1-3mm, widened AC joint has >7mm in men or >6mm in women.
| Grade | Description |
|---|---|
| Grade I | no deformity visible on x-ray - strain and contusion of the AC joint |
| Grade II | one half separation in the AC joint - the clavicle is displaced cranially by one half of the height of the AC joint, coraco-clavicular distance is increased |
| Grade III | complete AC joint separation more than one half of the height of the AC joint, coraco-clavicular distance is significantly increased |
References:
1. Tossy JD, Mead NC, Sigmond HM. Acromioclavicular separations: useful and practical classification for treatment. Clinical orthopaedics and related research, 1963, 28: 111.
Updated 1/12/2013 16:08 by Lambert
