Reported Reactions

Devices › Prosthesis, knee, patellofemorotibial, semi-constrained, cemented, polymer/metal/polymer

Device brand name · Tibial tray fix cemented s 2r

GMK Primary Total Knee System: medical device reports filed with FDA

182 reports name it, 2011–2026. Manufacturer given most often on reports: Medacta International. Product code JWH.

182
device reports naming the brand
0% of all MAUDE reports · about 12 a year
83
reports, 12 months to August 2026
96 in the 12 months before
1.1%
classified as malfunction
14.7% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

182 medical device reports received by FDA name the brand "GMK Primary Total Knee System" (tibial tray fix cemented s 2r); the manufacturer given most often on reports is Medacta International; received from January 2011 to August 2026. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

83 reports arrived in the 12 months to August 2026, down 14% from 96 in the 12 months before. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases. The event types recorded are injury (98.9%) and malfunction (1.1%); across all prosthesis, knee, patellofemorotibial, semi-constrained, cemented, polymer/metal/polymer reports (product code JWH) death is recorded in 0.2% and malfunction in 14.7%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are device appears to trigger rejection (31.9%), loosening of implant not related to bone-ingrowth (22.5%) and implant subsidence (4.4%). The patient problems coded most often are medical device site infection, joint laxity and aseptic loosening. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Reports by month, five years

0815Sep 2021: 0Oct 2021: 0Nov 2021: 0Dec 2021: 02022Jan 2022: 0Feb 2022: 0Mar 2022: 0Apr 2022: 0May 2022: 0Jun 2022: 0Jul 2022: 0Aug 2022: 0Sep 2022: 0Oct 2022: 0Nov 2022: 0Dec 2022: 02023Jan 2023: 0Feb 2023: 0Mar 2023: 0Apr 2023: 0May 2023: 0Jun 2023: 0Jul 2023: 0Aug 2023: 0Sep 2023: 0Oct 2023: 0Nov 2023: 0Dec 2023: 02024Jan 2024: 0Feb 2024: 0Mar 2024: 0Apr 2024: 0May 2024: 0Jun 2024: 0Jul 2024: 0Aug 2024: 0Sep 2024: 0Oct 2024: 10Nov 2024: 6Dec 2024: 72025Jan 2025: 1Feb 2025: 10Mar 2025: 9Apr 2025: 11May 2025: 15Jun 2025: 6Jul 2025: 14Aug 2025: 7Sep 2025: 4Oct 2025: 6Nov 2025: 5Dec 2025: 92026Jan 2026: 4Feb 2026: 6Mar 2026: 13Apr 2026: 4May 2026: 11Jun 2026: 5Jul 2026: 9Aug 2026: 7

Reports by the month FDA received them. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases.

By year received

049972011: 320112024: 2320242025: 9720252026: 592026

Event type and report source

Event type, as classified on the report

Death0%0
Injury98.9%180
Malfunction1.1%2
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%182
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 158,133 reports carrying product code JWH. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Device appears to trigger rejection5831.9%0.5%
Loosening of implant not related to bone-ingrowth4122.5%4%
Implant subsidence84.4%0%
Migrationthe device moved from where it was placed63.3%0.8%
Fracturea broken bone31.6%7.3%
Malposition of device31.6%0.9%
Osseointegration problem21.1%0.3%
Device dislodged or dislocated10.5%1.7%
Material integrity problema problem with the device material10.5%0.2%
Naturally worn10.5%6.8%
Positioning problem10.5%0.2%

FDA's device problem codes as entered on the report; one report can carry several. Generic codes such as "no apparent adverse event" are left out.

Patient problems coded

Patient problem (FDA code)ReportsShare
Medical device site infectioninfection at the device site5731.3%
Joint laxity3418.7%
Aseptic loosening2915.9%
Implant pain2714.8%
Appropriate clinical signs, symptoms and conditions term/code not available94.9%
Painpain, site not specified94.9%
Inadequate osseointegration84.4%
Loss of range of motion84.4%
Hypersensitivity/allergic reaction73.8%
Bone fracture(s)31.6%
Inflammationinflammation21.1%
Metal related pathology21.1%
Damage to ligament(s)10.5%
Joint dislocationa dislocated joint10.5%

Patient problem codes are present mainly in reports filed since 2019 and are often blank.

In context

MeasureGMK Primary Total Knee SystemProduct code JWHAll MAUDE reports
Reports182158,13326,136,888
Share of that pool—0.1%0%
Classified as death, per 1,000 reports029
Classified as injury98.9%84.1%36.2%
Classified as malfunction1.1%14.7%62.3%
Filed by the manufacturer100%98.4%94.9%

Shares are of reports, not of devices in use. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Other brands with product code JWH

BrandReportsLatest 12 monthsClassified as death
Unknown Knee Tibial Insert2,2471300.2%
Unknown Knee Femoral1,897650.2%
Unknown Knee Tibial Tray1,958570.2%
Persona Tibial Articular Surface Provisional1,58400%
Itotal G21,25000%
Specific Device Not Reported1,462200.2%
Apex Knee System1,001490%
Djo Surgical4,7132,4480%
Unknown Knee1,847181.5%
Attune Fb Tib Base Sz 5 Cem863180%
Attune Fb Tib Base Sz 4 Cem797140%
Pfc Sigma/Ov/Dome Pat 3peg 3880630.4%
Unknown Knee Patella791260.4%
Unknown Reconstructive Product2,57900.4%
UNK Attune Knee Tibial Insert8951020.1%

Ordered by report count for navigation only. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA also states that "common products may have a higher number of adverse events due to the higher total number of people using the product."

Questions about GMK Primary Total Knee System reports

How many FDA reports name GMK Primary Total Knee System?

182 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 83 in the latest 12 months.

What kinds of events are reported?

injury (98.9%) and malfunction (1.1%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

device appears to trigger rejection (31.9%), loosening of implant not related to bone-ingrowth (22.5%), implant subsidence (4.4%), migration (3.3%) and fracture (1.6%). These are FDA's device problem codes as entered on the report.

Who files these reports?

manufacturer reports (100%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.

Do these reports show that GMK Primary Total Knee System was at fault?

No. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA adds that "a causal relationship cannot be established between product and reactions listed in a report."

How do I report a problem with a medical device?

Through FDA MedWatch (Form FDA 3500 for health professionals and consumers), or to the manufacturer. See the guide on how to report.

Where this comes from. Counts are built from the openFDA Device Adverse Event (MAUDE) bulk export released 28 Sep 2026, which holds reports FDA received through 31 Aug 2026. Brand, generic and manufacturer names are as written on the reports; product code names come from FDA's device classification. A report counts here when any device it lists carries this brand name after punctuation and capitalisation are normalised. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.