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The device history record (dhr) review confirmed that the device met all material, assembly and performance specifications.Analysis of the returned device found that the ptfe (polytetrafluoroethylene) coating was peeled; no other anomalies were noted.The ptfe coating appeared to have peeled from an insecurely tightened torque device, however, this cannot be conclusively determined as the torque device used in this procedure was not returned for analysis.Based on the information available and investigation results, an assignable cause could not be definitively determined.
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