This report is being resubmitted for an incident that occurred earlier.The implant was returned for evaluation.The surgical procedure involved l5-s1 fusion using two rise cages with bilateral cortical screw posterior fixation.It was reported one of the spacers had a loss of height.No pre-operative images, or post operative images were provided, therefore any difference in cage height cannot be confirmed without pre-op and post-op images.Both returned spacers show abundant scratching on the anterior sides of the spacers consistent with tools used in the removal of the device.No determination can be made as to the possible loss of height in one of the devices.The initial surgery occurred in (b)(6) 2017, the exact date is unknown.The following sections have been updated in this report: a1, a2, a3, a5, a6, b1, b2, b3.B4, d4, d6b, d10, e1, e3, g2, g3, g4, g6, g7, h2, h3, h6, h8, h10.
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