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The associated complaint devices were not returned.A clinical evaluation was conducted and based on the documentation provided, currently unable to rule out the neutral and vertical version of the primary socket/acetabular component as a possible contributing factor to the known potential complications of femoral stem loosening, osteolysis and pain.Probable micro-motion and the heterotopic ossification also most likely contributed to the reported pain.(b)(6)).In addition to the violation of the posterior hip precautions/traumatic event at approximately 6 weeks of the 1st revision, the previously identified neutral/vertical version along with off-label use/mixed components could have also been a contributing factor to the reported recurrent instability (b)(6).The patient impact beyond the reported symptoms and revisions cannot be determined.No further medical assessment can be rendered at this time.A review of complaint history on the listed parts revealed no prior complaints for the listed batches with the same failure mode.A review of the manufacturing records did not reveal a manufacturing abnormality that could have caused or contributed to the reported incident.Without the actual product involved and/or device information, our investigation cannot proceed.If the device or new information is received in the future, this complaint can be re-opened.No further actions are being taken at this time.
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