510(k) Report

510(k) · Cleared

Cleared

ELEOS™ Limb Salvage System with NanoCept® Technology

K252920510(k) SpecialCleared Oct 15, 202533-day reviewClass II21 CFR 888.3900

Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly, last Nov 3, 2026

Onkos Surgical, Inc. · QZZ Limb And Joint Salvage Device With Coating For Bacteria Reduction

Cleared on Oct 15, 2025 as substantially equivalent to DEN210058 (Onkos Surgical, 2024) and 1 other predicate after a 33-day review. Its family tree reaches back 2 generations to 1994.

Decided
Oct 15, 2025
Review
33 days
Class
Class II
Product code
QZZ
Recalls
None
Predicates
2

Its longest line of descent runs back 2 generations to K932222 (1994). 6 ancestors in all. No later device cites it as a predicate yet.

Other ancestors, by year cleared 2024: 1 other ancestor2001: 1 other ancestor2000: 1 other ancestor1997: 1 other ancestorK932222 · SLT Femoral Head · Dow Corning Wright · 1994K161520 · ELEOS Limb Salvage System · Onkos Surgical, Inc. · 2016 · recalled1990200020102020
Other ancestors, by generation 1 generation back: 1 other ancestor2 generations back: 3 other ancestors K161520 · ELEOS Limb Salvage System · Onkos Surgical, Inc. · 2016 · recalledK932222 · SLT Femoral Head · Dow Corning Wright · 19940
  1. Root · 2 generations backK932222 SLT Femoral HeadDow Corning Wright · 1994
  2. 1 generation backK161520 ELEOS Limb Salvage SystemOnkos Surgical, Inc. · 2016 · Recalled
  3. This deviceK252920 ELEOS™ Limb Salvage System with NanoCept® TechnologyOnkos Surgical, Inc. · 2025
View FIG. 1 as a table

Line of descent and top descendants

GenerationNumberDeviceApplicantDecidedRecalls
−2K932222SLT Femoral HeadDow Corning Wright1994—
−1K161520ELEOS Limb Salvage SystemOnkos Surgical, Inc.201611
0 (this device)K252920ELEOS™ Limb Salvage System with NanoCept® TechnologyOnkos Surgical, Inc.2025—

Other ancestors by year cleared

Year clearedDevicesWith a Class I recall
199710
200010
200110
202410
FIG. 1 — Lineage of K252920, 1994–2025Source: FDA 510(k) summaries, read by 510(k) Report · How lineage is built

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Notable FDA decisions, review times and new Class I recalls. See an issue.

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 QZZ? 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 QZZ device

  1. #1 K253066 ELEOS™ with NanoCept® Technology Limb Salvage…score 11.8 · 2 generations · no Class I recall
Get a 510(k) 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.

TypeNumberDeviceApplicantDecidedRecalls
*DEN210058ELEOSx™ Limb Salvage System
Summary page 5
…888.3900 Product Code: QZZ, KRO Primary Predicate: ELEOSx™ Limb Salvage System Submission Number: DEN210058 Additional Predicate: ELEOS™ Limb Salvage System Submission Number: K161520 Device D…
Onkos Surgical2024—
*K161520ELEOS Limb Salvage System
Summary page 5
…e System Submission Number: DEN210058 Additional Predicate: ELEOS™ Limb Salvage System Submission Number: K161520 Device Description The Onkos Surgical ELEOS™ Limb Salvage System, a reconstruction implant system intended for joint replaceme…
Onkos Surgical, Inc.201611

Also cleared against DEN210058: 1 other device →

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 31 years and passes through 2 companies; a new generation was cleared every 22.4 years on median.
  • 3 of the 6 ancestors have a recall of any class.
  • 1 other device also cites its predicate DEN210058.

How does its category compare?

All QZZ devices

QZZ Limb And Joint Salvage Device With Coating For Bacteria Reduction: FDA decisions, review times, recalls and adverse event reports over 20 years. 2025, this device’s year, is highlighted.

FDA decisions per year · QZZ

1in 2025

2024: 12025: 12026 (partial year): 1
2007high 1 (2024) · low 0 (2007)2026

2026 to Oct 25, outlined.

Median 510(k) review, days · QZZ

Too few QZZ 510(k)s in any year since 2007 to give a median.

Recalls per year · QZZ

No recall names QZZ since 2007.

Adverse event reports per year · QZZ

30in 2025

2025: 30
2007high 30 (2025) · low 0 (2007)2025

MAUDE reports naming product code QZZ, not matched to any one device; reports are not rates.

View these four charts as a table
YearDecisionsMedian 510(k) review, daysRecalls (Class I)MAUDE reports
20070—00
20080—00
20090—00
20100—00
20110—00
20120—00
20130—00
20140—00
20150—00
20160—00
20170—00
20180—00
20190—00
20200—00
20210—00
20220—00
20230—00
20241—00
20251—030
20261—0—

What is it indicated for?

The ELEOS™ and ELEOS™ Limb Salvage System with NanoCept® Technology is indicated for resection and replacement of the proximal femur, intercalary portion of the femur, total femur, distal femur, and proximal tibia in skeletally mature patients with the following conditions: 1) Non-inflammatory degenerative joint disease such as osteoarthritis, traumatic arthritis, avascular necrosis, ankylosis, protrusion acetabuli, and painful hip dysplasia; 2)…

Read the full statement (257 words)

The ELEOS™ and ELEOS™ Limb Salvage System with NanoCept® Technology is indicated for resection and replacement of the proximal femur, intercalary portion of the femur, total femur, distal femur, and proximal tibia in skeletally mature patients with the following conditions:

1) Non-inflammatory degenerative joint disease such as osteoarthritis, traumatic arthritis, avascular necrosis, ankylosis, protrusion acetabuli, and painful hip dysplasia;

2) Inflammatory degenerative joint disease such as rheumatoid arthritis;

3) Correction of functional deformity;

4) Revision procedures where other treatments or devices have failed; and,

5) Treatment of fractures that are unmanageable using other techniques.

The ELEOS™ and ELEOS™ Limb Salvage System with NanoCept® Technology is also indicated for procedures where resection and replacement of the proximal femur, intercalary portion of the femur, total femur, distal femur, and proximal tibia is required with the following conditions:

1) Patients suffering from severe arthropathy of the hip and/or knee that does not respond to any conservative therapy or better alternative surgical treatment;

2) Surgical intervention for severe trauma, revision hip or knee arthroplasties, and/or Oncology indications;

3) Metastatic diseases

The ELEOS™ Limb Salvage System with NanoCept® Technology MDPB coating, where applied, is intended to reduce bacterial contamination prior to implantation resulting from deposition in the operating room on the surface of the device components. The clinical impact associated with the MDPB coating, including prevention of infection or reduction of infection risk in patients, has not been evaluated in human clinical trials. The MDPB coating is not intended to treat existing infections and does not act within or on the body.

Indications for use as stated in the FDA summary.

Cite this page

510(k) Report. “K252920: ELEOS™ Limb Salvage System with NanoCept® Technology.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 5, 2026. https://510kreport.com/device/K252920

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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