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- Detached Deltoid:
    - deltoid tendon & muscle that are reattached to raw acromial bone edge can pull away if they are improperly attached
    - if deltoid detachment occurs, it should be repaired as soon as possible, because if fixed contracture of deltoid develops little can be done;
- Axillary Nerve Injury:
    - if deltoid muscle is split anteriorly for more than 5 cm, branches of axillary nerve will be damaged, rendering corresponding portion of deltoid muscle ineffective;
    - smallest split possible should be made in deltoid to permit sufficient exposure of Rotator cuff