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Reported event: an event regarding loosening involving a trident shell was reported.The event was not confirmed.Method & results: device evaluation and results: visual inspection: the reported device was not returned however a photograph was provided for review.The photograph shows a recently explanted trident shell with the presence of biological matter.Material analysis, functional and dimensional inspections could not be performed as the device was not returned.Medical records received and evaluation: a review of the provided medical records by a clinical consultant stated the following comment: rejected, need clinical, past medical history, follow-ups, revision op report, serial x-ray images and examination of components.Device history review: all devices were manufactured and accepted into final stock with no relevant reported discrepancies.Complaint history review: there have been no other similar events for the reported lot.Conclusion: the exact cause of the event could not be determined because insufficient information was provided.Additional information including 'clinical, past medical history, follow-ups, revision op report, serial x-ray images and examination of components' are needed to fully investigate the event.If further information becomes available or the product is returned, this investigation will be re-opened.
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