510(k) · Cleared
ClearedFitbone Taa
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Wittenstein Intens GmbH · HSB Rod, Fixation, Intramedullary And Accessories
Cleared on Jan 26, 2017 as substantially equivalent to K131677 (Ellipse Technologies, Inc., 2013) and 1 other predicate after a 57-day review. Its family tree reaches back 7 generations to 1983. 10 later devices descend from it.
- Decided
- Jan 26, 2017
- Review
- 57 days
- Class
- Class II
- Product code
- HSB
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 7 generations to K831576 (1983). 9 ancestors in all. 10 later devices descend from it, 1 citing it directly.
- Root · 7 generations backK831576 OrthofixElectro-Biology, Inc. · 1983
- 6 generations backK955848 Orthofix ModulsystemOrthofix, Inc. · 1996 · Recalled
- 5 generations backK010322 Iskd (Intramedullary Skeletal Kinetic Distractor)Orthodyne, Inc. · 2001 · Recalled
- 4 generations backK031219 Modification to Iskd (Intramedullary Skeletal Kinetic Distractor)Orthofix, Inc. · 2003 · Recalled
- 3 generations backK101997 Ellipse Intramedullary Limb Lengthening SystemEllipse Technologies, Inc. · 2011 · Recalled
- 2 generations backK113219 Ellipse Precice Intramedullary Limb Lengthening SystemEllipse Technologies, Inc. · 2012
- 1 generation backK131490 Ellipse Precice Intramedullary Limb Lengthening SystemEllipse Technologies, Inc. · 2014
- This deviceK163368 Fitbone TaaWittenstein Intens GmbH · 2017
- Descendant · cites it directly · 9 of its ownK203399 Fitbone (R) TaaWittenstein Intens GmbH · 2021
- Descendant · 2 generations on · 3 of its ownK220234 Precice Intramedullary Limb Lengthening SystemNuvasive Specialized Orthopedics, Inc. · 2023
- Descendant · 2 generations on · 2 of its ownK233867 Fitbone TrochantericOrthofix Srl · 2024 · Recalled
- Descendant · 2 generations on · 2 of its ownK232169 FITBONE® Transport and Lengthening SystemOrthofix Srl · 2024
- Descendant · 3 generations on · 1 of its ownK232267 Precice Max SystemNuvasive Specialized Orthopedics, Incorporated · 2023 · Recalled
Showing 5 of 10 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 10 · See all- K203399Fitbone (R) TaaWittenstein Intens GmbH · 2021 · cites it directly9descendants
- K220234Precice Intramedullary Limb Lengthening SystemNuvasive Specialized Orthopedics, Inc. · 2023 · 2 generations on3descendants
- K233867Fitbone TrochantericOrthofix Srl · 2024 · 2 generations on2descendants
- K232169FITBONE® Transport and Lengthening SystemOrthofix Srl · 2024 · 2 generations on2descendants
- K232267Precice Max SystemNuvasive Specialized Orthopedics, Incorporated · 2023 · 3 generations on1descendant
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −7 | K831576 | Orthofix | Electro-Biology, Inc. | 1983 | — |
| −6 | K955848 | Orthofix Modulsystem | Orthofix, Inc. | 1996 | 23 |
| −5 | K010322 | Iskd (Intramedullary Skeletal Kinetic Distractor) | Orthodyne, Inc. | 2001 | 1 |
| −4 | K031219 | Modification to Iskd (Intramedullary Skeletal Kinetic Distractor) | Orthofix, Inc. | 2003 | 1 |
| −3 | K101997 | Ellipse Intramedullary Limb Lengthening System | Ellipse Technologies, Inc. | 2011 | 2 |
| −2 | K113219 | Ellipse Precice Intramedullary Limb Lengthening System | Ellipse Technologies, Inc. | 2012 | — |
| −1 | K131490 | Ellipse Precice Intramedullary Limb Lengthening System | Ellipse Technologies, Inc. | 2014 | — |
| 0 (this device) | K163368 | Fitbone Taa | Wittenstein Intens GmbH | 2017 | — |
| +1 | K203399 | Fitbone (R) Taa | Wittenstein Intens GmbH | 2021 | — |
| +2 | K220234 | Precice Intramedullary Limb Lengthening System | Nuvasive Specialized Orthopedics, Inc. | 2023 | — |
| +2 | K233867 | Fitbone Trochanteric | Orthofix Srl | 2024 | 1 |
| +2 | K232169 | FITBONE® Transport and Lengthening System | Orthofix Srl | 2024 | — |
| +3 | K232267 | Precice Max System | Nuvasive Specialized Orthopedics, Incorporated | 2023 | 1 |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1998 | 1 | 0 |
| 2013 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2021 | 1 | 0 |
| 2023 | 3 | 0 |
| 2024 | 2 | 0 |
| 2025 | 1 | 0 |
| 2026 | 3 | 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 HSB? 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 HSB device
- #1 K200869 Gamma3 Systemscore 19.8 · 8 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 |
|---|---|---|---|
| * | K131677 | Precice Intramedullary Limb Lengthening SystemSummary page 4…8.3020) Regulatory Class: II Panel: Orthopedic Devices Product Code: HSB E. Predicate Devices Ellipse Technologies; Ellipse PRECICE® System, K131677 (primary) Ellipse Technologies; Ellipse PRECICE® System, K131490… | 2013 |
| * | K131490 | Ellipse Precice Intramedullary Limb Lengthening SystemSummary page 4…evices Product Code: HSB E. Predicate Devices Ellipse Technologies; Ellipse PRECICE® System, K131677 (primary) Ellipse Technologies; Ellipse PRECICE® System, K131490 K163368 Page 2 of 5 F. Product Description T… | 2014 |
What descends from it? (10)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K203399 | Fitbone (R) Taa | 2021 | 9 |
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 34 years and passes through 5 companies; a new generation was cleared every 3.0 years on median.
- 4 of the 9 ancestors have a recall of any class.
- Of its descendants, K203399 (Wittenstein Intens GmbH, 2021) has gone furthest, with 9 descendants of its own.
- 5 other devices also cite its predicate K131677.
How does its category compare?
All HSB devicesHSB Rod, Fixation, Intramedullary And Accessories: FDA decisions, review times, recalls and adverse event reports over 20 years. 2017, this device’s year, is highlighted.
FDA decisions per year · HSB
15in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · HSB
106in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · HSB
18in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · HSB
2,911in 2025
MAUDE reports naming product code HSB, 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 | 8 | 68 | 0 | 162 |
| 2008 | 11 | 57 | 9 | 184 |
| 2009 | 18 | 86 | 81 | 334 |
| 2010 | 14 | 117 | 18 | 454 |
| 2011 | 16 | 78 | 2 | 662 |
| 2012 | 17 | 112 | 7 | 1,079 |
| 2013 | 18 | 105 | 14 | 1,773 |
| 2014 | 19 | 147 | 3 | 1,474 |
| 2015 | 22 | 111 | 3 | 1,671 |
| 2016 | 8 | 124 | 6 | 1,920 |
| 2017 | 23 | 119 | 66 | 1,447 |
| 2018 | 17 | 134 | 56 | 3,526 |
| 2019 | 13 | 132 | 6 | 2,517 |
| 2020 | 17 | 112 | 6 | 3,299 |
| 2021 | 10 | 94 | 2 | 4,111 |
| 2022 | 12 | 172 | 1 | 2,733 |
| 2023 | 11 | 162 | 1 | 2,219 |
| 2024 | 13 | 195 | 1 | 2,869 |
| 2025 | 15 | 106 | 18 | 2,911 |
| 2026 | 18 | 151 | 1 | — |
What is it indicated for?
The WITTENSTEIN intens GmbH FITBONE® TAA intramedullary lengthening system is intended for limb lengthening of the femur and tibia.
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/K163368 · printed Nov 5, 2026
Cite this page
510(k) Report. “K163368: Fitbone Taa.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 5, 2026. https://510kreport.com/device/K163368
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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