Open Access
Table 1.
Describes the arthroscopic morphological classification of the acromion spur with the arthroscopic picture for each type.
| Acromion spur type | Description | Picture |
|---|---|---|
| 1. Flat | Spur less than 2 mm from the inferior edge of the distal clavicle. |  |
| 2. Bump | Bump shape spur more than 2 mm from the inferior edge of the distal clavicle. |  |
| 3. Heel | Quadrangular shape spur more than 2 mm from the level of the distal clavicle (like the heel of the shoe). |  |
| 4. Keel | Sharp spur more than 2 mm from the level of the distal clavicle with central-downward facing like a sailboat’s keel. |  |
| 5. Irregular | Spur of the acromial side protruding more than 2 mm from the level of the distal clavicle with an irregular shape. |  |
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