An event regarding subsidence involving a tritanium baseplate was reported; the event was not confirmed.Method & results: device evaluation and results: not performed as no product was returned for evaluation.Medical records received and evaluation: a review of the provided x-rays by a clinical consultant was rejected stating "need operative reports, need patient histopathology reports, serial x-rays, office/clinical notes and examination of the explanted components." device history review: not performed as lot details are unknown.Complaint history review: not performed as lot details are unknown.Conclusions: the event could not be confirmed nor the root cause determined because the devices were not returned for evaluation and insufficient information was provided.Further information such as return of device, pre- and post-op xrays, patient history, histopathology report & follow-up notes are needed to investigate this event further.If additional information and/or device becomes available, this investigation will be reopened.
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