(b)(4).Initial reporter occupation: lawyer.During the investigation, a fractured threaded tip of an inserter and/or extractor tool was found retained within the insertion/extraction feature of (b)(4) (stem).The fractured inserter was not included on the initial report.Investigation summary: a fractured tip of an unknown instrument was returned for examination.Per a depuy metallurgist, no material or manufacturing defects that could have contributed to the failure of this instrument were observed.The information received will be retained for potential series investigations if triggered by trend analysis, post market surveillance, or other events within the quality system.Depuy considers the investigation closed.Should additional information be received, the information will be reviewed, and the investigation will be re-opened as necessary.
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