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Information was received from a healthcare provider (hcp) via manufacturer representative regarding a patient spinal therapy for degenerative spondylolisthesis and stenosis occurred at l4/5/s.It was reported that after performing plif at l5/s with capstone-peek, the rod with lordosis was placed on il and s1, then set screws were attached on l3, l4 and l5 over ari using cantilever technique, after that, the x-ray image was checked and it was found that the capstone-peek on the right side has moved forward.There was no overall delay in procedure and product remains in patient.There was patient involved in the event and no further complications reported regarding the event.Additional information was received on 2020-06-25: after correction with the cantilever technique, it was confirmed that the cage on the right side of l5 was protruding by about 10 mm from the front edge of the vertebral body.The procedure was completed as it was by the dr.'s judgement.No health damage in the patient was reported.Since the position has not been confirmed after the cage was placed, it is unknown exactly whether the event occurred when the cage was placed or after correction.Doctor¿s comments: the cage might be pushed out by cantilever.In the future, the cage will be removed from the anterior side when it backed out.
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