FDA product code · Orthopedic
Prosthesis, Knee, Patello/Femoral, Semi-Constrained, Cemented, Metal/Polymer
27 FDA decisions since 1996. 510(k) reviews decided 2021–2025 took a median of 67 days (half between 52 and 163). 7 recalls name this code, 0 of them Class I. The most-cited predicate is K041160, named by 5 later devices.
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly Download the data (CSV)
Twenty years of KRR at a glance: how often FDA decides these devices, how long 510(k) reviews take, how often they are recalled, and how many adverse event reports name the code.
FDA decisions per year · KRR
1in 2023
2026 to Oct 25, outlined.
Median 510(k) review, days · KRR
116in 2008
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · KRR
3in 2022
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · KRR
36in 2025
MAUDE reports naming product code KRR, 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 | 2 | — | 0 | 0 |
| 2008 | 3 | 116 | 0 | 0 |
| 2009 | 0 | — | 0 | 12 |
| 2010 | 0 | — | 0 | 6 |
| 2011 | 0 | — | 0 | 3 |
| 2012 | 1 | — | 0 | 9 |
| 2013 | 1 | — | 1 | 9 |
| 2014 | 0 | — | 0 | 26 |
| 2015 | 1 | — | 0 | 18 |
| 2016 | 1 | — | 1 | 14 |
| 2017 | 0 | — | 2 | 15 |
| 2018 | 1 | — | 0 | 14 |
| 2019 | 0 | — | 0 | 16 |
| 2020 | 1 | — | 0 | 6 |
| 2021 | 1 | — | 0 | 8 |
| 2022 | 1 | — | 3 | 9 |
| 2023 | 1 | — | 0 | 12 |
| 2024 | 0 | — | 0 | 25 |
| 2025 | 0 | — | 0 | 36 |
| 2026 | 0 | — | 0 | — |
Planning a device in KRR? A 510(k) Report ranks candidate predicates in this code by lineage, citations and recall history, with the review-time outlook.
See the 510(k) Report