Radiographs received confirmed the event.Images depicted the left bone screw backing out of c7 and fractured post operatively during the four years.The upper half of two broken screws were returned, measured and met dimensional specifications.Review of dhr cannot be completed as the lot number cannot be read (surface damage).Unknown factors include: patient activity at the time or prior to the event, patient bone quality, the degree of spinal instability, the longevity the degree of post lateral pseudarthrosis or patient compliance with post-operative care instructions or if the patient sustained a fall/impact of any sort (no trauma was reported).Root cause is likely the four year duration and patient's pseudarthrosis.
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On (b)(6) 2016, patient underwent anterior cervical fusion (acdf) surgery with a two level anterior cervical plate (acp) c5-c7.Patient had pseudoarthrosis/non-fusion.Reportedly on (b)(6) 2022, radiographs depicted the left c7 bone screw on the acp had backed out and then fractured.On (b)(6) 2022 revision surgery was performed to replace the construct.
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