510(k) · Cleared
ClearedU2 Total Knee System - Psa Type, Offset Stem Adapter
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
United Orthopedic Corporation · JWH Prosthesis, Knee, Patellofemorotibial, Semi-Constrained, Cemented, Polymer/Metal/Polymer
Cleared on Oct 30, 2013 as substantially equivalent to K082424 (United Orthopedic Corp., 2008) and 2 other predicates after a 191-day review. Its family tree reaches back 10 generations to 1994.
- Decided
- Oct 30, 2013
- Review
- 191 days
- Class
- Class II
- Product code
- JWH
- Recalls
- None
- Predicates
- 3
Its longest line of descent runs back 10 generations to K941847 (1994). 94 ancestors in all, the oldest K840643 (1984). No later device cites it as a predicate yet.
- Root · 10 generations backK941847 5/8 Porocoat Aml Hip Porocoat Porous CoatingDepuy, Inc. · 1994
- 6 generations between
- 3 generations backK081023 Evolis Total Knee SystemMedacta International S.A. · 2008 · Recalled
- 2 generations backK090988 GMK Total Knee SystemMedacta International S.A. · 2009 · Recalled
- 1 generation backK102437 GMK Revision Knee SystemMedacta International S.A. · 2010
- This deviceK131116 U2 Total Knee System - Psa Type, Offset Stem AdapterUnited Orthopedic Corporation · 2013
Show all 10 generations
- Root · 10 generations backK941847 5/8 Porocoat Aml Hip Porocoat Porous CoatingDepuy, Inc. · 1994
- 9 generations backK964650 TCP-Coated Porocoat Aml Femoral Hip ProsthesisDepuy, Inc. · 1997
- 8 generations backK980711 Harris/Galante Porous (HGP) Hip Prosthesis with Calcicoat Ceramic…Zimmer, Inc. · 1998 · Recalled
- 7 generations backK001277 Triflange Acetabular Cup SystemDePuy Orthopaedics, Inc. · 2000
- 6 generations backK031495 Pinnacle Duofix HA Acetabular Cup ProsthesisDePuy Orthopaedics, Inc. · 2003
- 5 generations backK042344 Excia Total Hip SystemAesculap, Inc. · 2005 · Recalled
- 4 generations backK070981 Search Evolution (LC) Total Knee System (Plasmapore)Aesculap Implant Systems, Inc. · 2007
- 3 generations backK081023 Evolis Total Knee SystemMedacta International S.A. · 2008 · Recalled
- 2 generations backK090988 GMK Total Knee SystemMedacta International S.A. · 2009 · Recalled
- 1 generation backK102437 GMK Revision Knee SystemMedacta International S.A. · 2010
- This deviceK131116 U2 Total Knee System - Psa Type, Offset Stem AdapterUnited Orthopedic Corporation · 2013
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −10 | K941847 | 5/8 Porocoat Aml Hip Porocoat Porous Coating | Depuy, Inc. | 1994 | — |
| −9 | K964650 | TCP-Coated Porocoat Aml Femoral Hip Prosthesis | Depuy, Inc. | 1997 | — |
| −8 | K980711 | Harris/Galante Porous (HGP) Hip Prosthesis with Calcicoat Ceramic Coating | Zimmer, Inc. | 1998 | 1 |
| −7 | K001277 | Triflange Acetabular Cup System | DePuy Orthopaedics, Inc. | 2000 | — |
| −6 | K031495 | Pinnacle Duofix HA Acetabular Cup Prosthesis | DePuy Orthopaedics, Inc. | 2003 | — |
| −5 | K042344 | Excia Total Hip System | Aesculap, Inc. | 2005 | 10 |
| −4 | K070981 | Search Evolution (LC) Total Knee System (Plasmapore) | Aesculap Implant Systems, Inc. | 2007 | — |
| −3 | K081023 | Evolis Total Knee System | Medacta International S.A. | 2008 | 1 |
| −2 | K090988 | GMK Total Knee System | Medacta International S.A. | 2009 | 1 |
| −1 | K102437 | GMK Revision Knee System | Medacta International S.A. | 2010 | — |
| 0 (this device) | K131116 | U2 Total Knee System - Psa Type, Offset Stem Adapter | United Orthopedic Corporation | 2013 | — |
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 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 8 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 0 |
| 2002 | 8 | 0 |
| 2003 | 5 | 0 |
| 2004 | 3 | 0 |
| 2005 | 2 | 0 |
| 2006 | 3 | 0 |
| 2007 | 3 | 0 |
| 2008 | 1 | 0 |
| 2010 | 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? (3)
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 |
|---|---|---|---|
| * | K082424 | United U2 Total Knee SystemSummary page 1…rained cemented prosthesis per 21CFR 888.3560. This falls under the Orthopedics panel. Class II Orthopaedics Device JWH 1. “UNITED” U2 Total Knee System — PSA Type (K082424) 2. “BIOMET” Vanguard™ 360 Revision Knee System (K093293) ' 3. “MEDACTA” GMK® Total Knee System- Revision (K102437) “UNITED” U… | 2008 |
| * | K093293 | Vanguard 360 Revision Knee SystemSummary page 1…under the Orthopedics panel. Class II Orthopaedics Device JWH 1. “UNITED” U2 Total Knee System — PSA Type (K082424) 2. “BIOMET” Vanguard™ 360 Revision Knee System (K093293) ' 3. “MEDACTA” GMK® Total Knee System- Revision (K102437) “UNITED” U2 Total Knee System — PSA Type, Offset Stem Adapter is a m… | 2010 |
| * | K102437 | GMK Revision Knee SystemSummary page 1…e JWH 1. “UNITED” U2 Total Knee System — PSA Type (K082424) 2. “BIOMET” Vanguard™ 360 Revision Knee System (K093293) ' 3. “MEDACTA” GMK® Total Knee System- Revision (K102437) “UNITED” U2 Total Knee System — PSA Type, Offset Stem Adapter is a modification of cleared Offset Stem Adapter (K082424). This… | 2010 |
What descends from it?
No later submission names this one as a predicate yet.
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 19 years and passes through 7 companies; a new generation was cleared every 1.8 years on median.
- 44 of the 93 ancestors have a recall of any class.
- 8 other devices also cite its predicate K082424.
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. 2013, 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?
This device is indicated in knee arthroplasty for reduction or relief of pain and/or improved knee function in skeletally mature patients with severe knee pain and disability due to rheumatoid arthritis, ostcoarthritis, primary and secondary traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral condyle or pseudogout, posttraumatic loss of joint configuration, particularly when there is patellofemoral erosion…
Read the full statement (100 words)
This device is indicated in knee arthroplasty for reduction or relief of pain and/or improved knee function in skeletally mature patients with severe knee pain and disability due to rheumatoid arthritis, ostcoarthritis, primary and secondary traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral condyle or pseudogout, posttraumatic loss of joint configuration, particularly when there is patellofemoral erosion, dysfunction or prior patellectomy, moderate valgus, varus, or flexion contraction. This device is intended for use in patients who require augmentation and/or stem extensions due to inadequate bone stock and/or require constrained stabilization for tibiofemoral joint due to soft tissue imbalance.
Indications for use read by OCR from a scanned FDA summary, so letters may be misread. Check the PDF before quoting it.
https://510kreport.com/device/K131116 · printed Nov 6, 2026
Cite this page
510(k) Report. “K131116: U2 Total Knee System - Psa Type, Offset Stem Adapter.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K131116
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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