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Definition

Scaphoid non union advanced collapse

Diagnosis

Xray / CT

- non union of scaphoid

- radio-scaphoid OA

Operative Options

Definition

Scapho-lunate advanced collapse

- caused by malalignment of scaphoid on radius

- due to scapholunate disruption

Most common cause of wrist OA

Pathology

1.  Radio-scaphoid degenerative changes

- from abnormal flexion of scaphoid