510(k) · Cleared
ClearedKasm Knee Articulating Spacer Molds
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Ortho Development Corp. · JWH Prosthesis, Knee, Patellofemorotibial, Semi-Constrained, Cemented, Polymer/Metal/Polymer
Cleared on Feb 18, 2014 as substantially equivalent to K050210 (Biomet, Inc., 2005) after a 98-day review. Its family tree reaches back 3 generations to 1995.
- Decided
- Feb 18, 2014
- Review
- 98 days
- Class
- Class II
- Product code
- JWH
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 3 generations to K936159 (1995). No later device cites it as a predicate yet.
- Root · 3 generations backK936159 Natural-Knee II SystemIntermedics Orthopedics · 1995 · Recalled
- 2 generations backK032522 Tecres Spacer-K Temporary Knee ProsthesisExactech, Inc. · 2004
- 1 generation backK050210 Disposable Cement Spacer Molds for Temporary Knee ProsthesesBiomet, Inc. · 2005 · Recalled
- This deviceK133449 Kasm Knee Articulating Spacer MoldsOrtho Development Corp. · 2014
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −3 | K936159 | Natural-Knee II System | Intermedics Orthopedics | 1995 | 6 |
| −2 | K032522 | Tecres Spacer-K Temporary Knee Prosthesis | Exactech, Inc. | 2004 | — |
| −1 | K050210 | Disposable Cement Spacer Molds for Temporary Knee Prostheses | Biomet, Inc. | 2005 | 8 |
| 0 (this device) | K133449 | Kasm Knee Articulating Spacer Molds | Ortho Development Corp. | 2014 | — |
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? (1)
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 |
|---|---|---|---|
| * | K050210 | Disposable Cement Spacer Molds for Temporary Knee ProsthesesSummary page 1…polymer/metal/polymer semi-constrained cemented prosthesis DEVICE PRODUCT CODES: JWH, MBB PREDICATE DEVICES: StageOne m Knee Cement Spacer Molds, Biomet (K0502 10) KASM® 510(k) Section 5, 510(k) Summary… | 2005 |
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 4 companies; a new generation was cleared every 8.6 years on median.
- 2 of the 3 ancestors have a recall of any class.
- 2 other devices also cite its predicate K050210.
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?
KASM® is intended for use in temporary total knee arthroplasty procedures with the following indications:
1. Active sepsis which requires a two-stage revision arthroplasty procedure
2. Skeletally mature patients who will consistently use limited mobility assistive devices such as a walker, canes, crutches, etc., for the entire implantation period
3. Implantation period of 180 days or less
Use only with polymethylmethacrylate/gentamicin bone cement.
The articulating cement spacer prosthesis fashioned using the KASM® mold is intended for cemented fixation only.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K133449 · printed Nov 6, 2026
Cite this page
510(k) Report. “K133449: Kasm Knee Articulating Spacer Molds.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K133449
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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