Method: device inspection, material analysis and device history review.Results: device history indicated all devices accepted into final stock met specifications.Visual inspection indicated the returned anchors were confirmed to be jammed inside the returned inserter guide.Materials analysis results indicate that the deformation damage and cracking were observed in the anterior region of the 1st jammed anchor.The directionality of these damages would be consistent with the anchor hitting something while being inserted, stopping the anchor.These damages are likely related to the root cause of the 1st anchor jamming.Conclusion: the exact cause of these damages could not be determined.With anchor a jammed in the channel, anchor b could not be inserted past anchor a¿s location.Further loading to attempt anchor b¿s insertion exacerbated the jammed condition.
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