MAUDE Adverse Event Report: STRYKER ORTHOPAEDICS-MAHWAH TRIATHLON STEM EXTENDER 50MM; PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, C

Catalog Number	5571-S-050
Medical Device Problem Code	Insufficient Device Problem Information (3190)
Health Effect - Clinical Code	Injury (2348)
Date of Event	05/14/2012
Type of Reportable Event	Serious Injury
Additional Manufacturer Narrative
The information in this report was provided by stryker orthopaedics legal affairs department.No additional information is available at this time due to the ongoing litigation.Should additional information become available, the evaluation summary will be submitted in a supplemental report.Device not returned to manufacturer.
Event or Problem Description
Letter received regarding a patient; advising the stryker ts triathlon knee replacement is "defective and materially contributed to.Ongoing left lower limb problems including the development of a pseudo-tumour".Patient is reporting left knee problems following surgery on "the" (b)(6) 2012.Please see communication log for details regarding additional information.As per op report: comments: triathlon ts cemented revision knee from an (b)(6) male revised after 4 years due to osteolysis and alval (pseudotumour) is presented for analysis.High activity level and medial bone loss around the tibial component are considered contributory factor to failure of the device.Femoral component: a combination of bone and fibrous tissue onto cement mantle indicating a well fixed components - numerous longitudinal scratches on bearing surface.Threaded boss covered with organic material and showing wear on the surface in contact with stem extender (fig.1).Femoral stem extender: corrosion and wear in the base of threaded trunnion from uneven engagement with femoral component boss covered with organic material (fig.2).Femoral stem: wear in the base of threaded trunnion from uneven engagement with femoral extender tibia baseplate: polished cement surface, indicative of micromotion, postero-medially.Bone tissue still attached to the cement mantle, anteriorly.Severe fretting corrosion of the surface of the boss as well as corrosion deposits in the threaded boss in contact with stem trunnion.Tibial stem: component was loose and removed from the baseplate manually.Gross fretting and corrosion in the trunnion: stem surface (inset, fig.4), and in the trunnion threads (fig.5).Polyethylene (pe) insert: slight wear on the bearing surface, mostly scratching and burnishing.Burnishing around the ps post, posteriorly and media-lateral regions from contact with the femoral component.
Additional Manufacturer Narrative
An event regarding altr(adverse local tissue reaction) involving a triathlon extension piece was reported.Conclusion: a full investigation was completed for the ts knee construct and stems within this pi.The provided implant sheet contains a note on the patient label for this device which indicates that the product was opened in error and not used in the surgery.Based on the information provided there is no indication or allegation that device reported in this investigation may have contributed to the event.No further investigation is required at this time.If additional information becomes available to indicate further evaluation is warranted, this record will be reopened.
Event or Problem Description
Letter received regarding a patient; advising the stryker ts triathlon knee replacement is "defective and materially contributed to.On going left lower limb problems including the development of a pseudo-tumour".Patient is reporting left knee problems following surgery on the (b)(6) 2012.Please see communication log for details regarding additional information.As per op report: comments: triathlon ts cemented revision knee from an 63 year old male revised after 4 years due to osteolysis and alval (pseudotumour) is presented for analysis.High activity level and medial bone loss around the tibial component are considered contributory factor to failure of the device.Femoral component: a combination of bone and fibrous tissue onto cement mantle indicating a well fixed components - numerous longitudinal scratches on bearing surface threaded boss covered with organic material and showing wear on the surface in contact with stem extender (fig.1).Femoral stem extender: corrosion and wear in the base of threaded trunnion from uneven engagement with femoral component boss covered with organic material (fig.2).Femoral stem: wear in the base of threaded trunnion from uneven engagement with femoral extender tibia baseplate: polished cement surface, indicative of micromotion, postero-medially, bone tissue still attached to the cement mantle, anteriorly, severe fretting corrosion of the surface of the boss as well as corrosion deposits in the threaded boss in contact with stem trunnion.Tibial stem: component was loose and removed from the baseplate manually.Gross fretting and corrosion in the trunnion: stem surface (inset, fig.4), and in the trunnion threads (fig.5) polyethylene (pe) insert: slight wear on the bearing surface, mostly scratching and burnishing around the ps post, posteriorly and media-lateral regions from contact with the femoral component.

• Brand Name: TRIATHLON STEM EXTENDER 50MM
• Common Device Name: PROSTHESIS, KNEE, PATELLO/FEMOROTIBIAL, SEMI-CONSTRAINED, UNCEMENTED, POROUS, C
• Manufacturer (Section D): STRYKER ORTHOPAEDICS-MAHWAH; 325 corporate drive; mahwah NJ 07430
• MDR Report Key: 8226157
• Report Number: 0002249697-2019-00065
• Device Sequence Number: 16643661
• Product Code: MBH
• UDI-Device Identifier: 07613327014983
• UDI-Public: 07613327014983
• Combination Product (Y/N): N
• Initial Reporter Country: AU
• PMA/510(K) Number: K141056
• Number of Events Summarized: 1
• Summary Report (Y/N): N
• Device Implanted Year: 2012
• Device Explanted Year: 2016
• Reporter Type: Manufacturer
• Report Source: company representative,other
• Initial Reporter Occupation: Other
• Type of Report: Initial,Followup
• Report Date (Section B): 06/11/2019

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: 03/31/2013
• Device Catalogue Number: 5571-S-050
• Device Lot Number: N3A63AD
• Was Device Available for Evaluation?: No
• Initial Date Received by Manufacturer: 12/11/2018
• Supplement Date Received by Manufacturer: 05/14/2019
• Initial Report FDA Received Date: 01/08/2019
• Supplement Report FDA Received Date: 06/11/2019
• Is This a Single-Use Device that was Reprocessed and Reused on a Patient? (Y/N): No
• Patient Sequence Number: 1
• Outcome Attributed to Adverse Event: Hospitalization; Required Intervention
• Patient Age: 58 YR