510(k) · Cleared
Recalled · Class II · 2016Itotal Cruciate Retaining (CR) Knee Replacement System, Itotal Posterior Stabilized (PS) Knee Replacement System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Conformis, Inc. · JWH Prosthesis, Knee, Patellofemorotibial, Semi-Constrained, Cemented, Polymer/Metal/Polymer
Cleared on Nov 14, 2014 as substantially equivalent to K140423 (Conformis, Inc., 2014) and 1 other predicate after a 100-day review. Its family tree reaches back 11 generations to 1981. 24 later devices descend from it. It has been recalled 6 times.
- Decided
- Nov 14, 2014
- Review
- 100 days
- Class
- Class II
- Product code
- JWH
- Recalls
- 6
- Predicates
- 2
Its longest line of descent runs back 11 generations to K810258 (1981). 107 ancestors in all. 24 later devices descend from it, 4 citing it directly.
- Root · 11 generations backK810258 Proximal Fermoral Hip ReplacementBiomet, Inc. · 1981
- 7 generations between
- 3 generations backK122870 Itotal Cruciate Retaining (CR) Knee Replacement SystemConformis, Inc. · 2013
- 2 generations backK131019 Itotal Cruciate Retaining (C) Knee Replacement SystemConformis, Inc. · 2013
- 1 generation backK140423 Itotal Cruciate Retaining (CR) Knee Replacement SystemConformis, Inc. · 2014 · Recalled
- This deviceK142161 Itotal Cruciate Retaining (CR) Knee Replacement System, Itotal…Conformis, Inc. · 2014
- Descendant · cites it directly · 23 of its ownK152704 iTotal Posterior Stabilized Knee Replacement System, iTotal Cruciate…Conformis, Inc. · 2015
- Descendant · cites it directly · 20 of its ownK160025 iTotal Posterior Stabilized (PS) Knee Replacement System, iTotal…Conformis, Inc. · 2016 · Recalled
- Descendant · 2 generations on · 18 of its ownK161366 ConfoMIS iTotal Cruciate Retaining (CR) Knee Replacement System…Conformis, Inc. · 2016
- Descendant · cites it directly · 18 of its ownK153217 ConforMIS iTotal Posterior Stabilized Knee Replacement SystemConformis, Inc. · 2016
- Descendant · 3 generations on · 17 of its ownK180906 Conformis iTotal Cruciate Retaining (CR) Knee Replacement SystemConformis, Inc. · 2018 · Recalled
Show all 11 generations
- Root · 11 generations backK810258 Proximal Fermoral Hip ReplacementBiomet, Inc. · 1981
- 10 generations backK974558 Salvage/Onocology Hip and Total Femur SystemBiomet, Inc. · 1998
- 9 generations backK032396 Ringloc 36MM Line and Modular Femoral HeadsBiomet, Inc. · 2003 · Recalled
- 8 generations backK050327 E-Poly (Vitamin E) Acetabular LinersBiomet, Inc. · 2005
- 7 generations backK070364 100KGY E-Poly Maxrom Acetabular LinersBiomet, Inc. · 2007
- 6 generations backK080528 E-Poly Tibial BearingsBiomet Orthopedics, Inc. · 2008
- 5 generations backK091956 Highly Cross-Linked Vitamin E Uhmwpe Tibial Inserts, Model…Encore Medical L.P. · 2010 · Recalled
- 4 generations backK103223 Highly Cross-Linked Vitamin E Uhmwpe Tibial InsertsEncore Medical L.P. · 2010
- 3 generations backK122870 Itotal Cruciate Retaining (CR) Knee Replacement SystemConformis, Inc. · 2013
- 2 generations backK131019 Itotal Cruciate Retaining (C) Knee Replacement SystemConformis, Inc. · 2013
- 1 generation backK140423 Itotal Cruciate Retaining (CR) Knee Replacement SystemConformis, Inc. · 2014 · Recalled
- This deviceK142161 Itotal Cruciate Retaining (CR) Knee Replacement System, Itotal…Conformis, Inc. · 2014
Showing 5 of 24 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 24 · See all- K152704iTotal Posterior Stabilized Knee Replacement System, iTotal Cruciate Retaining Knee…Conformis, Inc. · 2015 · cites it directly23descendants
- K160025iTotal Posterior Stabilized (PS) Knee Replacement System, iTotal Cruciate Retaining (CR)…Conformis, Inc. · 2016 · cites it directly20descendants
- K161366ConfoMIS iTotal Cruciate Retaining (CR) Knee Replacement System (iTotal CR KRS)Conformis, Inc. · 2016 · 2 generations on18descendants
- K153217ConforMIS iTotal Posterior Stabilized Knee Replacement SystemConformis, Inc. · 2016 · cites it directly18descendants
- K180906Conformis iTotal Cruciate Retaining (CR) Knee Replacement SystemConformis, Inc. · 2018 · 3 generations on17descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −11 | K810258 | Proximal Fermoral Hip Replacement | Biomet, Inc. | 1981 | — |
| −10 | K974558 | Salvage/Onocology Hip and Total Femur System | Biomet, Inc. | 1998 | — |
| −9 | K032396 | Ringloc 36MM Line and Modular Femoral Heads | Biomet, Inc. | 2003 | 3 |
| −8 | K050327 | E-Poly (Vitamin E) Acetabular Liners | Biomet, Inc. | 2005 | — |
| −7 | K070364 | 100KGY E-Poly Maxrom Acetabular Liners | Biomet, Inc. | 2007 | — |
| −6 | K080528 | E-Poly Tibial Bearings | Biomet Orthopedics, Inc. | 2008 | — |
| −5 | K091956 | Highly Cross-Linked Vitamin E Uhmwpe Tibial Inserts, Model 391/392-09_19-702_712 | Encore Medical L.P. | 2010 | 4 |
| −4 | K103223 | Highly Cross-Linked Vitamin E Uhmwpe Tibial Inserts | Encore Medical L.P. | 2010 | — |
| −3 | K122870 | Itotal Cruciate Retaining (CR) Knee Replacement System | Conformis, Inc. | 2013 | — |
| −2 | K131019 | Itotal Cruciate Retaining (C) Knee Replacement System | Conformis, Inc. | 2013 | — |
| −1 | K140423 | Itotal Cruciate Retaining (CR) Knee Replacement System | Conformis, Inc. | 2014 | 1 |
| 0 (this device) | K142161 | Itotal Cruciate Retaining (CR) Knee Replacement System, Itotal Posterior… | Conformis, Inc. | 2014 | — |
| +1 | K152704 | iTotal Posterior Stabilized Knee Replacement System, iTotal Cruciate Retaining… | Conformis, Inc. | 2015 | — |
| +1 | K160025 | iTotal Posterior Stabilized (PS) Knee Replacement System, iTotal Cruciate… | Conformis, Inc. | 2016 | 1 |
| +2 | K161366 | ConfoMIS iTotal Cruciate Retaining (CR) Knee Replacement System (iTotal CR KRS) | Conformis, Inc. | 2016 | — |
| +1 | K153217 | ConforMIS iTotal Posterior Stabilized Knee Replacement System | Conformis, Inc. | 2016 | — |
| +3 | K180906 | Conformis iTotal Cruciate Retaining (CR) Knee Replacement System | Conformis, Inc. | 2018 | 4 |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1981 | 1 | 0 |
| 1984 | 1 | 0 |
| 1988 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 9 | 0 |
| 1995 | 11 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 0 |
| 2002 | 5 | 0 |
| 2003 | 4 | 0 |
| 2004 | 6 | 0 |
| 2005 | 4 | 0 |
| 2006 | 2 | 0 |
| 2007 | 2 | 0 |
| 2008 | 3 | 0 |
| 2010 | 3 | 0 |
| 2011 | 3 | 0 |
| 2012 | 7 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2015 | 1 | 0 |
| 2016 | 5 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 3 | 0 |
| 2021 | 5 | 0 |
| 2022 | 2 | 0 |
| 2023 | 5 | 0 |
| 2025 | 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? (2)
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 |
|---|---|---|---|
| * | K140423 | Itotal Cruciate Retaining (CR) Knee Replacement SystemSummary page 7…Product Code: JWH, OOG, OIY Regulation Number: 21 CFR 888.3560 510(k) Number: K140423 and K140833 Device Class: II ® Device Desc… | 2014 |
| * | K140833 | Itotal Posterior Stabilized (PS) Knee Replacement SystemSummary page 7…Product Code: JWH, OOG, OIY Regulation Number: 21 CFR 888.3560 510(k) Number: K140423 and K140833 Device Class: II ® Device Description:… | 2014 |
What descends from it? (24)
See all 244 later devices cite it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K152704 | iTotal Posterior Stabilized Knee Replacement System, iTotal Cruciate Retaining Knee… | 2015 | 23 |
| K160025 | iTotal Posterior Stabilized (PS) Knee Replacement System, iTotal Cruciate Retaining (CR)… | 2016 | 20 |
| K153217 | ConforMIS iTotal Posterior Stabilized Knee Replacement System | 2016 | 18 |
| K153721 | iTotal Cruciate Retaining (CR) Knee Replacement System | 2016 | 0 |
Has anything in its family been recalled? (0 Class I)
Recalls of this device
| Date | Class | Recall | Root cause | Reason |
|---|---|---|---|---|
| Jan 28, 2016 | Class II | Z-1070-2016 | Packaging process control | Incorrect femoral component distributed |
| Aug 31, 2015 | Class II | Z-0144-2016 | Process design | May contain small amounts of ethylene glycol residue |
| Aug 31, 2015 | Class II | Z-0141-2016 | Process design | May contain small amounts of ethylene glycol residue |
| Aug 31, 2015 | Class II | Z-0146-2016 | Process design | May contain small amounts of ethylene glycol residue |
| Aug 31, 2015 | Class II | Z-0147-2016 | Process design | May contain small amounts of ethylene glycol residue |
| Aug 31, 2015 | Class II | Z-0145-2016 | Process design | May contain small amounts of ethylene glycol residue |
The 5 latest of 6 recalls; the web page lists all.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 33 years and passes through 4 companies; a new generation was cleared every 1.6 years on median.
- 50 of the 107 ancestors have a recall of any class.
- Of its descendants, K152704 (Conformis, Inc., 2015) has gone furthest, with 23 descendants of its own.
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. 2014, 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?
The iTotal CR Knee Replacement System (KRS) is intended for use as a total knee replacement in patients with knee joint pain and disability whose conditions cannot be solely addressed by the use of a prosthetic device that treats only one or two of the three knee compartments, such as a unicondylar, patellofemoral or bicompartmental prosthesis. The Indications for Use include: Painful joint disease due to osteoarthritis, traumatic arthritis, rheumatoid…
Read the full statement (264 words)
The iTotal CR Knee Replacement System (KRS) is intended for use as a total knee replacement in patients with knee joint pain and disability whose conditions cannot be solely addressed by the use of a prosthetic device that treats only one or two of the three knee compartments, such as a unicondylar, patellofemoral or bicompartmental prosthesis.
The Indications for Use include:
Painful joint disease due to osteoarthritis, traumatic arthritis, rheumatoid arthritis or osteonecrosis of the knee.
Post traumatic loss of joint function.
Moderate varus, valgus or flexion deformity in which the ligamentous structures can be returned to adequate function and stability.
Failed osteotomies, hemiarthroplasties, and unicondylar, patellofemoral or bicompartmental implants.
Revision procedures provided that anatomic landmarks necessary for alignment and positioning of the implant are identifiable on patient imaging scans.
This implant is intended for cemented use only.
The iTotal PS Knee Replacement System (KRS) is intended for use as a total knee replacement in patients with knee joint pain and disability whose conditions cannot be solely addressed by the use of a prosthetic device that treats only one or two of the three knee compartments, such as a unicondylar, patellofemoral or bicompartmental prosthesis.
The Indications for Use include:
Painful joint disease due to osteoarthritis, traumatic arthritis, rheumatoid arthritis, polyarthritis or osteonecrosis of the knee.
Post traumatic loss of joint function.
Moderate varus, valgus or flexion deformity.
Failed osteotomies, hemiarthroplasties, and unicondylar, patellofemoral or bicompartmental implants.
Revision procedures provided that anatomic landmarks necessary for alignment and positioning of the implant are identifiable on patient imaging scans
This implant is intended for cemented use only.
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/K142161 · printed Nov 6, 2026
Cite this page
510(k) Report. “K142161: Itotal Cruciate Retaining (CR) Knee Replacement System, Itotal Posterior Stabilized (PS) Knee Replacement System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K142161
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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