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Forbidden positions: 1, 2, 3, 7, 8, 9.
Safe positions: 4, 5, 6, 10, 11, 12.
Reference positions: 4, 10, 11.
COMMENTS:
The application of positions 4, 10 and 11 is optimal at this level, because in this case the transosseous elements will minimally stand in the way of soft tissue displacement relative to the humerus while motions in adjacent joints.
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