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Review of the device history records indicate that devices were manufactured and accepted into final stock with no reported discrepancies.There have been no other events for the lot referenced.It was noted that the device is not available for evaluation.If additional information is received, it will be provided in a supplemental report upon completion of the investigation.The following devices were also listed in this report: triathlon cr fem comp #8 r-cem; cat#5510f802; lot# spsxx, triathlon prim cem fxd bplt #7; cat#5520b700; lot# ssf8s, triathlon asymmetric x3 patella; cat#5551-g-381; lot#0x01, it cannot be determined which, if any of these devices may have caused or contributed to the patient's experience.
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Event regarding crack/fracture involving a triathlon insert was reported.The event was confirmed by medical review.Method & results: product evaluation and results: not performed as the device was not returned for evaluation.Clinician review: a review of the provided medical records and/or x-rays by a clinical consultant indicated: "on (b)(6) 2017 the note states, ¿complains of one-month history of right knee pain, locking something loose in the knee.No complaints regarding the surgery prior to one month ago.Physical examination: 0° to 100°, no joint line tenderness, stable to varus and valgus.X-ray shows a stable total knee without acute findings.Plan: surgical intervention.¿.On (b)(6) 2018 a right knee arthroscopic removal of loose bodies (poly component) was performed for a diagnosis of right knee loose body status-post total knee arthroplasty.The operative report describes general anesthesia and the use of a tourniquet.The report notes, ¿patellar poly intact, femoral component stable, two loose poly pieces, one 1 x 2-centimeters and one 1 x 1-centimeters originating from the posteromedial tibial poly.A small third piece was also removed.¿ uncomplicated surgery was described, seven arthroscopic spot films of poor resolution labeled, ¿removing pieces of poly¿ and ¿posteromedial missing poly¿ are reviewed x-ray printouts of the right knee include x-rays dated (b)(6) 2011 and (b)(6) 2017, which are ap, lateral and patellar views of the right knee demonstrating a cemented total knee arthroplasty with all components well-fixed with no evidence of loosening.The knee is in approximately 5° of varus in both sets of films.After seven-and-a-half years in situ with a slight varus alignment, some fragmentation of the posteromedial tibial poly occurred in this large, obese male patient.Fatigue failure of the poly likely due to repeated overload was the suggested mechanism.Examination of the poly fragments and/or the explanted insert if revision surgery is performed would rule out manufacturing or material factors as contributing to this clinical situation." product history review: all devices in the reported lot were manufactured and accepted into final stock with no reported discrepancies.Complaint history review: there have been no other similar events for the lot referenced.Conclusions: it was reported that patient was experiencing pain and knee was locking and bearing was shattered.A review of the provided medical records and/or x-rays by a clinical consultant indicated that after seven-and-a-half years in situ with a slight varus alignment, some fragmentation of the posteromedial tibial poly occurred in this large, obese male patient.Fatigue failure of the poly likely due to repeated overload was the suggested mechanism.Examination of the poly fragments and/or the explanted insert if revision surgery is performed would rule out manufacturing or material factors as contributing to this clinical situation.The exact root cause couldn't be determined due to insufficient information.No further investigation for this event is possible at this time.If additional information/ device becomes available to indicate further evaluation is warranted, this record will be reopened.
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