Thursday, October 15, 2020

Reverse total shoulder - baseplate screw failure

A woman in her late 50s had shoulder pain and weakness of her left shoulder after a failed cuff repair.

She desired a reverse total shoulder. At surgery there was an intact subscapularis but absent supraspinatus and infraspinatus.

Her sequential Grashey views are shown here

1.4 months post op

3 months post op

5.9 months post op. At this time she complained of some left shoulder pain after lifting her grandchild.

7.4 months post op. The left shoulder pain remained.

33 months post op The left shoulder pain abruptly increased.

Comment: The post operative views suggest incomplete seating of the base plate, which may have subjected the screws to bending forces leading to their failure from fatigue.

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