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Atzei class 1
- isolated peripheral TFCC tear of the distal (styloid) attachment
Atzei class 2
- peripheral TFCC tear of both attachments the styloid and foveal insertion
Atzei class 3
- isolated peripheral TFCC tear of the proximal (foveal) attachment
- avulsion fracture of the TFCC insertion
Atzei class 4
- extensive TFCC tear, which can not be repaired by common capsular repair or foveal fixation
- degenerative or frayed tear edges which do not hold sutures and show poor healing properties
Atzei class 5
- peripheral tear and associated distal radioulnar joint (DRUJ) arthritis or osteochondral injury