MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH MODULAR DUAL MOBILITY INSERT; PROSTHESIS, HIP, SEMI-CONSTRAINED, METAL/CERAMIC/POLYMER, CEMENTED OR NON-POROUS

Catalog Number	626-00-48G
Medical Device Problem Code	Adverse Event Without Identified Device or Use Problem (2993)
Health Effect - Clinical Codes	Pain (1994); Ambulation or Postural Difficulties (2544)
Date of Event	04/03/2024
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
An event regarding wear/metallosis involving a mdm liner was reported.The event was confirmed via clinician review of the provided medical records.Method & results: product evaluation and results: the reported device was not returned; however, photographs were provided for review.The photographs show a recently explanted metal mdm liner, poly adm liner, and 4 screws sealed inside a poly bag.Nothing remarkable can be seen on these devices in the photos.Clinician review: a review of the provided medical information by a clinical consultant indicated: "this patient underwent primary total hip arthroplasty, a revision total hip arthroplasty for polyethylene liner disassociation, with metallosis, and then another revision for acetabular loosening with metallosis.The root cause of these events cannot be determined with certainty.The causes of both acetabular loosening, polyethylene, disassociation, and metallosis, are multi factorial, including surgical technique, especially in the way preparation is made for insertion of the femoral head on the trunnion and the mdm liner into the acetabulum, as well as proper insertion of the polyethylene liner into a primary acetabular cup.Also contributing can be patient factors such as activity level and bmi, as well as implant factors." product history review: review of the device history records indicate devices were manufactured and accepted into final stock with no relevant reported 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 loosening of the acetabular component and metallosis.The reported device was not returned; however, photographs were provided for review.The photographs show a recently explanted metal mdm liner, poly adm liner, and 4 screws sealed inside a poly bag.Nothing remarkable can be seen on these devices in the photos.It was not reported what devices caused or contributed to the reported metallosis, and the stem and head in this case were competitor devices.It is possible that the metallosis generated due to motion of the loose shell against the acetabular screws or between the metal mdm liner and the shell.The event was further confirmed via clinician review of the provided medical records: "the root cause of these events cannot be determined with certainty.The causes of both acetabular loosening, polyethylene, disassociation, and metallosis, are multi factorial, including surgical technique, especially in the way preparation is made for insertion of the femoral head on the trunnion and the mdm liner into the acetabulum, as well as proper insertion of the polyethylene liner into a primary acetabular cup.Also contributing can be patient factors such as activity level and bmi, as well as implant factors." no further investigation for this event is possible at this time.If devices and/or additional information become available to indicate further evaluation is warranted, this record will be reopened.H3 other text : not returned.
Event or Problem Description
It was reported that the patient's right hip was revised.Patient originally presented with report of knee pain (patient does not have any knee implants).X-rays showed that the competitor femoral head had broken into multiple pieces.As a result, the trunnion of the competitor stem wore through the stryker adm/ mdm poly insert, and was articulating against the mdm metal liner.This caused the patient to compensate their gait, which caused the knee pain.The mdm liner, adm/ mdm poly insert, and competitor ceramic head were revised to another mdm metal liner, adm/ mdm poly insert, and competitor femoral head.Rep confirmed that no further information will be released by the hospital or surgeon.

• Brand Name: MODULAR DUAL MOBILITY INSERT
• Common Device Name: PROSTHESIS, HIP, SEMI-CONSTRAINED, METAL/CERAMIC/POLYMER, CEMENTED OR NON-POROUS
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• Manufacturer (Section G): STRYKER ORTHOPAEDICS-CORK; ida industrial estate; carrigtwohill NA ; EI NA
• Manufacturer Contact: brad curtis ; 325 corporate drive; mahwah, NJ 07430 ; 2018315000
• MDR Report Key: 19220483
• Report Number: 0002249697-2024-00676
• Device Sequence Number: 8198624
• Product Code: LZO
• UDI-Device Identifier: 04546540666031
• UDI-Public: 04546540666031
• Combination Product (Y/N): N
• Initial Reporter State: FL
• Initial Reporter Country: US
• PMA/510(K) Number: K103233
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2018
• Device Explanted Year: 2024
• Reporter Type: Manufacturer
• Report Source: Other,Health Professional
• Initial Reporter Occupation: Physician
• Type of Report: Initial
• Report Date (Section B): 05/01/2024

1 Device was Involved in the Event

1 Patient was Involved in the Event

• Is this an Adverse Event Report?: Yes
• Is this a Product Problem Report?: No
• Operator of Device: Health Professional
• Device Expiration Date: 11/30/2021
• Device Catalogue Number: 626-00-48G
• Device Lot Number: 57350002
• Was Device Available for Evaluation?: No
• Is the Reporter a Health Professional?: Yes
• Type of Report(Section G): Initial
• Initial Date Received by Manufacturer: 04/03/2024
• Initial Report FDA Received Date: 05/01/2024
• Was Device Evaluated by Manufacturer? (Y/N): Device Not Returned to Manufacturer
• Date Device Manufactured: 11/11/2016
• Is the Device Labeled for Single Use? (Y/N): Yes
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Usage of Device: Initial
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Required Intervention; Hospitalization
• Patient Age: 64 YR
• Patient Sex: Male
• Patient Weight: 70 KG