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Reported event: an event regarding crack/fracture involving an exeter stem was reported.The event was confirmed via evaluation of the returned device.Method & results: -product evaluation and results: visual inspection: visual inspection & material analysis: review of the exeter stem, catalogue # 0580-1-044, lot code g8373911 confirmed fracture through the mid-stem region.Characterisation using stereo microscopy and scanning electron microscopy confirmed fracture to have propagated in fatigue.No manufacturing or material related defects were observed on the device surfaces examined.-clinician review: a review of the provided medical records by a clinical consultant indicated: "confirmation of event: i can confirm that the patient underwent a cemented exeter femoral prosthesis implantation along with a screw type cementless cup with a ceramic head since i was able to review xrays with the implant in place.I cannot confirm the date because no information is given other than the implantation and explanation dates in the product inquiry.Similarly i can only confirm that the patient had a revision procedure since i was able to review x-rays with a revision implant in place but i cannot confirm the date or any other details.Root cause analysis: the root cause of this event cannot be determined with certainty.The causes of femoral prosthesis fracture are multifactorial including surgical technique factors and patient factors including activity level, lifestyle and bmi.In this case i believe this primary implant was used in a revision fashion and was inserted penetrating the femoral cortex.This can contribute to the event.With the information provided i would not necessarily assign any causality to the implant itself unless the implant was examined by stryker engineers and found to be defective.The distal cement was grade a and the proximal cement was grade b which could lead to a stress riser." -product history review: review of the product history records indicate the reported device was manufactured with no reported relevant discrepancies.-complaint history review: there have been no other similar events for the lot referenced.Conclusions: it was reported that the patient was revised due to fracture of the exeter stem.A review of the provided medical records by a clinical consultant indicated: "confirmation of event: i can confirm that the patient underwent a cemented exeter femoral prosthesis implantation along with a screw type cementless cup with a ceramic head since i was able to review xrays with the implant in place.I cannot confirm the date because no information is given other than the implantation and explanation dates in the product inquiry.Similarly i can only confirm that the patient had a revision procedure since i was able to review x-rays with a revision implant in place but i cannot confirm the date or any other details.Root cause analysis: the root cause of this event cannot be determined with certainty.The causes of femoral prosthesis fracture are multifactorial including surgical technique factors and patient factors including activity level, lifestyle and bmi.In this case i believe this primary implant was used in a revision fashion and was inserted penetrating the femoral cortex.This can contribute to the event.With the information provided i would not necessarily assign any causality to the implant itself unless the implant was examined by stryker engineers and found to be defective.The distal cement was grade a and the proximal cement was grade b which could lead to a stress riser." visual inspection & material analysis: review of the exeter stem, catalogue # 0580-1-044, lot code g8373911 confirmed fracture through the mid-stem region.Characterisation using stereo microscopy and scanning electron microscopy confirmed fracture to have propagated in fatigue.No manufacturing or material related defects were observed on the device surfaces examined.No further investigation for this event is possible at this time.If additional information becomes available to indicate further evaluation is warranted, this record will be reopened.
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