510(k) · Cleared
ClearedGMK-SPHERE Tibial inserts FLEX Tibial Insert CR and Resurfacing Patella made of E-CROSS (Vitamin E Highly Crosslinked UHMWPE)
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Medacta International S.A. · JWH Prosthesis, Knee, Patellofemorotibial, Semi-Constrained, Cemented, Polymer/Metal/Polymer
Cleared on Sep 18, 2020 as substantially equivalent to K121416 (Medacta International, 2012) and 5 other predicates after a 58-day review. Its family tree reaches back 16 generations to 1994. 1 later device descends from it.
- Decided
- Sep 18, 2020
- Review
- 58 days
- Class
- Class II
- Product code
- JWH
- Recalls
- None
- Predicates
- 6
Its longest line of descent runs back 16 generations to K941847 (1994). 97 ancestors in all, the oldest K840643 (1984). 1 later device descends from it, 1 citing it directly.
- Root · 16 generations backK941847 5/8 Porocoat Aml Hip Porocoat Porous CoatingDepuy, Inc. · 1994
- 12 generations between
- 3 generations backK140826 GMK Sphere ExtensionMedacta International · 2014
- 2 generations backK162035 GMK SphereMedacta International S.A. · 2017
- 1 generation backK181635 GMK Sphere CR Tibial InsertsMedacta International S.A. · 2018
- This deviceK202022 GMK-SPHERE Tibial inserts FLEX Tibial Insert CR and Resurfacing…Medacta International S.A. · 2020
- Descendant · cites it directly · 0 of its ownK262057 GMK ExtensionMedacta International SA · 2026
Show all 16 generations
- Root · 16 generations backK941847 5/8 Porocoat Aml Hip Porocoat Porous CoatingDepuy, Inc. · 1994
- 15 generations backK964650 TCP-Coated Porocoat Aml Femoral Hip ProsthesisDepuy, Inc. · 1997
- 14 generations backK980711 Harris/Galante Porous (HGP) Hip Prosthesis with Calcicoat Ceramic…Zimmer, Inc. · 1998 · Recalled
- 13 generations backK001277 Triflange Acetabular Cup SystemDePuy Orthopaedics, Inc. · 2000
- 12 generations backK031495 Pinnacle Duofix HA Acetabular Cup ProsthesisDePuy Orthopaedics, Inc. · 2003
- 11 generations backK042344 Excia Total Hip SystemAesculap, Inc. · 2005 · Recalled
- 10 generations backK070981 Search Evolution (LC) Total Knee System (Plasmapore)Aesculap Implant Systems, Inc. · 2007
- 9 generations backK081023 Evolis Total Knee SystemMedacta International S.A. · 2008 · Recalled
- 8 generations backK090988 GMK Total Knee SystemMedacta International S.A. · 2009 · Recalled
- 7 generations backK102437 GMK Revision Knee SystemMedacta International S.A. · 2010
- 6 generations backK103170 GMK Revision Knee SC LinersMedacta International S.A. · 2011
- 5 generations backK113571 GMK Resufacing Patella Size 4Medacta International · 2012
- 4 generations backK121416 GMK SphereMedacta International · 2012
- 3 generations backK140826 GMK Sphere ExtensionMedacta International · 2014
- 2 generations backK162035 GMK SphereMedacta International S.A. · 2017
- 1 generation backK181635 GMK Sphere CR Tibial InsertsMedacta International S.A. · 2018
- This deviceK202022 GMK-SPHERE Tibial inserts FLEX Tibial Insert CR and Resurfacing…Medacta International S.A. · 2020
Most influential descendants
Showing 1 of 1 · See all- K262057GMK ExtensionMedacta International SA · 2026 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −16 | K941847 | 5/8 Porocoat Aml Hip Porocoat Porous Coating | Depuy, Inc. | 1994 | — |
| −15 | K964650 | TCP-Coated Porocoat Aml Femoral Hip Prosthesis | Depuy, Inc. | 1997 | — |
| −14 | K980711 | Harris/Galante Porous (HGP) Hip Prosthesis with Calcicoat Ceramic Coating | Zimmer, Inc. | 1998 | 1 |
| −13 | K001277 | Triflange Acetabular Cup System | DePuy Orthopaedics, Inc. | 2000 | — |
| −12 | K031495 | Pinnacle Duofix HA Acetabular Cup Prosthesis | DePuy Orthopaedics, Inc. | 2003 | — |
| −11 | K042344 | Excia Total Hip System | Aesculap, Inc. | 2005 | 10 |
| −10 | K070981 | Search Evolution (LC) Total Knee System (Plasmapore) | Aesculap Implant Systems, Inc. | 2007 | — |
| −9 | K081023 | Evolis Total Knee System | Medacta International S.A. | 2008 | 1 |
| −8 | K090988 | GMK Total Knee System | Medacta International S.A. | 2009 | 1 |
| −7 | K102437 | GMK Revision Knee System | Medacta International S.A. | 2010 | — |
| −6 | K103170 | GMK Revision Knee SC Liners | Medacta International S.A. | 2011 | — |
| −5 | K113571 | GMK Resufacing Patella Size 4 | Medacta International | 2012 | — |
| −4 | K121416 | GMK Sphere | Medacta International | 2012 | — |
| −3 | K140826 | GMK Sphere Extension | Medacta International | 2014 | — |
| −2 | K162035 | GMK Sphere | Medacta International S.A. | 2017 | — |
| −1 | K181635 | GMK Sphere CR Tibial Inserts | Medacta International S.A. | 2018 | — |
| 0 (this device) | K202022 | GMK-SPHERE Tibial inserts FLEX Tibial Insert CR and Resurfacing Patella made… | Medacta International S.A. | 2020 | — |
| +1 | K262057 | GMK Extension | Medacta International SA | 2026 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1987 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 8 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 7 | 0 |
| 2002 | 8 | 0 |
| 2003 | 4 | 0 |
| 2004 | 3 | 0 |
| 2005 | 1 | 0 |
| 2006 | 2 | 0 |
| 2007 | 3 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2026 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in JWH? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new JWH device
- #1 K221479 Persona Personalized Knee Systemscore 22.4 · 11 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (6)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K121416 | GMK SphereSummary page 4…ce Classification II III. Predicate Device Substantial equivalence is claimed to the following device: • Medacta International SA, GMK Sphere K121416 • Medacta International SA, GMK Sphere Extension, Kl 40826 • Medacta International SA, GMK Knee Prosthesis- GMK… | 2012 |
| * | K140826 | GMK Sphere ExtensionSummary page 5…tricompartmental replacement of the natural knee joint. They are a line extension to Medacta previously cleared implants: GMK Sphere (K121416), GMK Sphere Extension, (K140826), GMK Knee Prosthesis- GMK Sphere Tibial Insert Flex (K162035), GMK Sphere CR Tibial Inserts (K181635) and GMK Total Knee System… | 2014 |
| * | K162035 | GMK SphereSummary page 4…6 • Medacta International SA, GMK Sphere Extension, Kl 40826 • Medacta International SA, GMK Knee Prosthesis- GMK Sphere Tibial Insert Flex, K162035 • Medacta International SA, GMK Sphere CR Tibial Inserts, K181635 • Medacta International SA, GMK Total Knee Sy… | 2017 |
| * | K181635 | GMK Sphere CR Tibial InsertsSummary page 4…• Medacta International SA, GMK Knee Prosthesis- GMK Sphere Tibial Insert Flex, K162035 • Medacta International SA, GMK Sphere CR Tibial Inserts, K181635 • Medacta International SA, GMK Total Knee System, K090988 • Medacta International SA, GMK Resurfacing Patella… | 2018 |
| * | K090988 | GMK Total Knee SystemSummary page 4…al Insert Flex, K162035 • Medacta International SA, GMK Sphere CR Tibial Inserts, K181635 • Medacta International SA, GMK Total Knee System, K090988 • Medacta International SA, GMK Resurfacing Patella Size 4, Kl 13571 GMK Sphere E-CROSS CR Tibial Insert… | 2009 |
| * | K113571 | GMK Resufacing Patella Size 4 | 2012 |
| † | K120370 | Vivacit-E Vitamin E Highly Crosslinked Polyethylene Liners | 2012 |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K262057 | GMK Extension | 2026 | 0 |
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 26 years and passes through 7 companies; a new generation was cleared every 1.6 years on median.
- 39 of the 96 ancestors have a recall of any class.
- Of its descendants, K262057 (Medacta International SA, 2026) has gone furthest, with 0 descendants of its own.
- 11 other devices also cite its predicate K121416.
How does its category compare?
All JWH devicesJWH Prosthesis, Knee, Patellofemorotibial, Semi-Constrained, Cemented, Polymer/Metal/Polymer: FDA decisions, review times, recalls and adverse event reports over 20 years. 2020, this device’s year, is highlighted.
FDA decisions per year · JWH
20in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · JWH
55in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · JWH
2in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · JWH
9,306in 2025
MAUDE reports naming product code JWH, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 18 | 74 | 14 | 1,305 |
| 2008 | 17 | 81 | 10 | 1,483 |
| 2009 | 11 | 168 | 109 | 1,870 |
| 2010 | 19 | 85 | 32 | 3,286 |
| 2011 | 25 | 87 | 27 | 5,133 |
| 2012 | 33 | 85 | 85 | 5,203 |
| 2013 | 31 | 128 | 31 | 6,135 |
| 2014 | 33 | 98 | 13 | 6,722 |
| 2015 | 27 | 87 | 11 | 6,881 |
| 2016 | 18 | 88 | 17 | 7,586 |
| 2017 | 25 | 118 | 61 | 12,263 |
| 2018 | 25 | 90 | 14 | 14,071 |
| 2019 | 28 | 133 | 5 | 14,987 |
| 2020 | 22 | 59 | 2 | 12,592 |
| 2021 | 24 | 61 | 8 | 9,408 |
| 2022 | 17 | 56 | 12 | 8,364 |
| 2023 | 20 | 57 | 67 | 8,947 |
| 2024 | 19 | 89 | 7 | 10,828 |
| 2025 | 20 | 55 | 2 | 9,306 |
| 2026 | 12 | 63 | 4 | — |
What is it indicated for?
GMK knee prosthesis is designed for cemented use in total knee arthroplasty, if there is evidence of sufficient sound bone to seat and support the components. This knee replacement system is indicated in the following cases: • Severely painful and/or disabled joint as a result of arthritis, traumatic arthritis, rheumatoid arthritis or polyarthritis. • Avascular necrosis of femoral condyle. • Post traumatic loss of joint configuration. • Primary…
Read the full statement (199 words)
GMK knee prosthesis is designed for cemented use in total knee arthroplasty, if there is evidence of sufficient sound bone to seat and support the components.
This knee replacement system is indicated in the following cases:
• Severely painful and/or disabled joint as a result of arthritis, traumatic arthritis, rheumatoid arthritis or polyarthritis.
• Avascular necrosis of femoral condyle.
• Post traumatic loss of joint configuration.
• Primary implantation failure.
GMK Sphere can be implanted using a kinematic alignment approach. When a kinematic alignment approach is utilized, this knee replacement system is indicated in the following cases:
• Severely painful and/or disabled joint as a result of arthritis, traumatic arthritis, rheumatoid arthritis or polyarthritis.
• Collagen disorders, and/or avascular necrosis of the femoral condyle.
• Moderate valgus, varus, or flexion deformities.
Tibial wedges cemented are to be attached to the tibial baseplate with both the fixing cylinders and bone cement.
The screwed tibial augments are for screwed fixation to the tibial baseplate.
In case a semi-constrained liner is used, an extension stem must be implanted both on the tibial and on the femoral components. In case a GMK Revision tibial tray is used, an extension stem must be implanted.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K202022 · printed Nov 6, 2026
Cite this page
510(k) Report. “K202022: GMK-SPHERE Tibial inserts FLEX Tibial Insert CR and Resurfacing Patella made of E-CROSS (Vitamin E Highly Crosslinked UHMWPE).” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K202022
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026