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EXACTECH, INC. LOGIC CR TIB INSERT SLOPE++, SZ 3, 9MM; PROSTHESIS, KNEE, PATELLOFEMOROTIBIAL, SEMI-CONSTRAINED, CEMENTED, POLYMER/METAL
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| Model Number |
02-012-49-3009 |
| Medical Device Problem Code |
Naturally Worn (2988)
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| Health Effect - Clinical Codes |
Failure of Implant (1924); Pain (1994); Scar Tissue (2060); Swelling/ Edema (4577)
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| Date of Event |
09/09/2022
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Type of Reportable Event
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Serious Injury
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Additional Manufacturer Narrative
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Pending evaluation.Concomitant device(s): 4876820, 02-010-03-0230 - logic cr femoral cem, left, sz 3; 4799531, 02-012-45-3030 - lgc tibial fit tray cem sz 3f / 3t; 4920867, 200-05-26 - inset patella 26mm.
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Event or Problem Description
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Approximately 5 yrs postop the initial implant, the 77 y/o female patient presented to the surgeon's office with complaints of pain, stiffness, and swelling in left knee.After examination and x-ray of the left tka, there is evidence of poly wear and poor alignment on the radiograph.The poly implant that is currently in was searched in the recall database and is a part of the knee poly implant recall.The original poly is also the slope ++ style.The patient was scheduled for a revision of left tka, a possible poly swap for (b)(6) 2022.The surgeon opened the knee, performed a synovectomy, examined the implants and had questions on if the patella or any of the exactech patellae are a part of the recall.As the representative, i replied no, the knee, ankle, ad old hip polys are involved in the recall.The surgeon explained that the patella implant looked poor or weird and abnormally worn for the length of time that it has been implanted.The surgeon said he is not confident that it is only a packaging issue for the cause of poly failures, but potentially an issue with the manufacturing process itself.The surgeon then paid attention to the tibial insert polyethylene.It was removed with a 1/4" curved osteotome.The poly presented with severe posterior wear, delamination, and pitting throughout the articular surface.There was pieces or fragments of the poly insert that were floating in the joint space that were removed.The joint was washed out, a further synovectomy was performed and then the metal implants were examined.There was evidence of osteolysis and there was obvious tibial baseplate wear according to the surgeon.He explained that a poly swap would not be in the patient¿s best interest due to this.The surgeon decided to covert the exactech cr tka to a zimmer persona revision tka.The exactech implants that were removed were requested to be saved and returned to exactech for examination.
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Additional Manufacturer Narrative
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(h3) the revision reported was likely the result of high in-vivo forces and instability of the knee that allowed for excessive posterior and medial contact leading to full-thickness wear of the polyethylene tibial insert and subsequent wear of the tibial tray.A contributing factor to the wear seen on the returned tibial insert may have been result of being packaged in a non-conforming vacuum bag for more than five years.Section h11: *the following sections have corrected information: (h6) component code: 734, bearings.
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Additional Manufacturer Narrative
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This follow-up report is being submitted to relay corrected information.The following sections were corrected: b1, b2, b5, d8, d9, h3, h6: clinical codes, investigation findings, investigation conclusion.If any further information is obtained that would change or alter any information provided, a supplemental report will be filed accordingly.
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Event or Problem Description
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Report #1 of 2.It was reported a patient underwent a left total knee arthroplasty.Subsequently, the patient experienced pain, stiffness, and swelling.As a result, approximately five (5) later the patient underwent a left total knee revision procedure due to prosthesis wear.An operative report was provided.Intraoperatively, scar tissue was observed and was debrided.The tibial insert was noted to be significantly worn with full thickness loss of polyethylene substance.The tibial and femoral components were noted to be well fixed.The patella component was noted to be worn of the polyethylene.The patient was reported to have tolerated the procedure well.No further patient impact was reported.Pre-operative x-rays were provided.The explants were received for evaluation.No additional information is available.
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