On (b)(6) 2016 it was identified to the company that a set screw ((b)(4)) had possibly backed out of the construct for the tiger mis spine system.It was later reported that further x-ray imaging during post-op review identified the set screw had cross-threaded.It is apparent through this information that user error upon implantation lead to this occurence.No adverse event was reported along with this instance, and no plans for revision surgery have been identified to the manufacturer at this time.
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