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The purpose of this investigation is to evaluate the reported issue of a misplaced screw.Visual and functional inspection was unable to be completed because the part was not returned, and no imaging was provided.Based on the details provided, a l4-s1 mis tlif was completed in 2021 with creo mis screws.The left l4 6.5x45mm creo amp screw was misplaced and was causing the patient pain and discomfort.A revision surgery was completed on (b)(6) 2025 to remove and replace the left l4 screw.The calculated observed risk level matches the expected risk level; therefore, the overall risk of the system has been maintained and there is no further investigation required.
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