510(k) · Cleared
ClearedWristore Distal Radius Fracture Fixator, 4600 Series
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Zimmer, Inc. · KTT Appliance, Fixation, Nail/Blade/Plate Combination, Multiple Component
Cleared on Nov 17, 2004 as substantially equivalent to K012294 (Millennium Medical Technologies, Inc., 2002) and 1 other predicate after a 43-day review. Its family tree reaches back 3 generations to 1994. 1 later device descends from it.
- Decided
- Nov 17, 2004
- Review
- 43 days
- Class
- Class II
- Product code
- KTT
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 3 generations to K942906 (1994). 7 ancestors in all. 1 later device descends from it, 1 citing it directly.
- Root · 3 generations backK942906 Agee-Wristjack Pre-Drill KitHand Biomechanics Lab, Inc. · 1994
- 2 generations backK984498 Synthes (Usa) Articulating Distal Radius (Adrf) SystemSynthes (Usa) · 1999
- 1 generation backK012294 Wristore FixatorMillennium Medical Technologies, Inc. · 2002
- This deviceK042761 Wristore Distal Radius Fracture Fixator, 4600 SeriesZimmer, Inc. · 2004
- Descendant · cites it directly · 0 of its ownK052498 Fragment Specific FixatorDavid J. Slutsky MD · 2005
Most influential descendants
Showing 1 of 1 · See all- K052498Fragment Specific FixatorDavid J. Slutsky MD · 2005 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −3 | K942906 | Agee-Wristjack Pre-Drill Kit | Hand Biomechanics Lab, Inc. | 1994 | — |
| −2 | K984498 | Synthes (Usa) Articulating Distal Radius (Adrf) System | Synthes (Usa) | 1999 | — |
| −1 | K012294 | Wristore Fixator | Millennium Medical Technologies, Inc. | 2002 | — |
| 0 (this device) | K042761 | Wristore Distal Radius Fracture Fixator, 4600 Series | Zimmer, Inc. | 2004 | — |
| +1 | K052498 | Fragment Specific Fixator | David J. Slutsky MD | 2005 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1996 | 1 | 0 |
| 1998 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2005 | 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 KTT? 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 KTT device
- #1 K242861 TrueLok Elevatescore 21.3 · 14 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.
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 |
|---|---|---|---|
| K052498 | Fragment Specific Fixator | 2005 | 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 10 years and passes through 4 companies; a new generation was cleared every 3.0 years on median.
- 1 of the 7 ancestors has a recall of any class.
- Of its descendants, K052498 (David J. Slutsky MD, 2005) has gone furthest, with 0 descendants of its own.
- 1 other device also cites its predicate K012294.
How does its category compare?
All KTT devicesKTT Appliance, Fixation, Nail/Blade/Plate Combination, Multiple Component: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · KTT
10in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · KTT
88in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · KTT
2in 2021
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · KTT
673in 2025
MAUDE reports naming product code KTT, 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 | 9 | 55 | 2 | 45 |
| 2008 | 11 | 73 | 1 | 66 |
| 2009 | 11 | 94 | 2 | 45 |
| 2010 | 12 | 148 | 1 | 121 |
| 2011 | 10 | 157 | 0 | 196 |
| 2012 | 9 | 140 | 4 | 527 |
| 2013 | 7 | 87 | 7 | 898 |
| 2014 | 14 | 129 | 0 | 445 |
| 2015 | 12 | 60 | 0 | 401 |
| 2016 | 10 | 142 | 0 | 400 |
| 2017 | 11 | 184 | 1 | 485 |
| 2018 | 6 | 149 | 14 | 597 |
| 2019 | 8 | 110 | 3 | 800 |
| 2020 | 9 | 200 | 0 | 942 |
| 2021 | 10 | 83 | 2 | 961 |
| 2022 | 3 | 25 | 0 | 627 |
| 2023 | 7 | 29 | 0 | 554 |
| 2024 | 5 | 90 | 0 | 523 |
| 2025 | 10 | 88 | 0 | 673 |
| 2026 | 5 | 68 | 11 | — |
What is it indicated for?
The WristoreTM* Distal Radius Fracture Fixator is indicated for external fixation of the upper extremity.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K042761 · printed Nov 6, 2026
Cite this page
510(k) Report. “K042761: Wristore Distal Radius Fracture Fixator, 4600 Series.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K042761
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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