(b)(4).Complaint sample was returned for evaluation.Reported event was confirmed.Risk management file review was deemed appropriate.The root cause of the reported bolt seizure was found to be the application of off-axis loading during bolt assembly which leads to a bending moment across the threaded junction.This bending moment results in increased and non-uniform loading within the threads, leading to damage and adhesion between the components.Concomitant devices proximal targeting guide adolescent nail: item number; 01-1503-0002, lot number; 201906-c; guide rod obturator: item number; 01-1501-0014, lot number; 1417101-a; 9mm x 360mm adolescent nail, left: item number; 00-1503-0936, lot number; 1785726-b.
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It was reported that during surgery, the proximal targeting guide, adolescent nail attachment bolt and adolescent nail, left became stuck and were unable to be disconnected.No adverse events have been reported as a result of the malfunction.
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