510(k) · Cleared
ClearedZenius™, Iliad™ and Kora™ Spinal Fixation Systems
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Medyssey USA, Inc. · NKB Thoracolumbosacral Pedicle Screw System
Cleared on Aug 13, 2018 as substantially equivalent to K171526 (Medyssey USA, Inc., 2017) and 1 other predicate after a 20-day review. Its family tree reaches back 13 generations to 1985. 1 of the 157 devices in its family, counting itself, has a Class I recall.
- Decided
- Aug 13, 2018
- Review
- 20 days
- Class
- Class II
- Product code
- NKB
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 13 generations to K853033 (1985). 156 ancestors in all. No later device cites it as a predicate yet. 1 of the 157 devices in this family, counting this one, has a Class I recall.
- Root · 13 generations backK853033 Hartshill Rect & Wires, Spinal Fixation SystemA.W. Showell (Surgicraft), Ltd. · 1985
- 9 generations between
- 3 generations backK102249 Expedium Spine SystemDepuy Spine, A Johnson & Johnson Company · 2010
- 2 generations backK142835 Iliad Pedicle Screw System and Zenius Pedicle Screw SystemMedyssey USA, Inc. · 2015
- 1 generation backK171509 Iliad® Pedicle Screw System and Zenius® Pedicle Screw SystemMedyssey USA, Inc. · 2017
- This deviceK181978 Zenius™, Iliad™ and Kora™ Spinal Fixation SystemsMedyssey USA, Inc. · 2018
Show all 13 generations
- Root · 13 generations backK853033 Hartshill Rect & Wires, Spinal Fixation SystemA.W. Showell (Surgicraft), Ltd. · 1985
- 12 generations backK965221 Ransford Cervical Fixation SystemSurgicraft, Ltd. · 1997
- 11 generations backK982322 Synthes Spine Occipital-Cervical Plate/Rod and Hook SystemSynthes (Usa) · 1998
- 10 generations backK002733 Summit Occipito-Cervico-Thoracic (Oct) Spinal SystemDepuyacromed · 2000
- 9 generations backK013222 Summit Occipito-Cervico- Thoracic (Oct) Spinal SystemDepuyacromed · 2001
- 8 generations backK022190 Modification to Summit Occipito-Cervico-Thoracic (Oct) Spinal SystemDepuyacromed · 2002
- 7 generations backK030103 Summit Oct Spinal System Minipolyaxial ScrewsDepuyacromed · 2003
- 6 generations backK041203 Summit Oct Spinal SystemDepuy Spine, Inc. · 2004
- 5 generations backK062174 Modification to Expedium Spine SystemDepuy Spine, Inc. · 2006
- 4 generations backK070387 Expedium Spine SystemDepuy Spine, Inc. · 2007
- 3 generations backK102249 Expedium Spine SystemDepuy Spine, A Johnson & Johnson Company · 2010
- 2 generations backK142835 Iliad Pedicle Screw System and Zenius Pedicle Screw SystemMedyssey USA, Inc. · 2015
- 1 generation backK171509 Iliad® Pedicle Screw System and Zenius® Pedicle Screw SystemMedyssey USA, Inc. · 2017
- This deviceK181978 Zenius™, Iliad™ and Kora™ Spinal Fixation SystemsMedyssey USA, Inc. · 2018
Class I recalls in this family
- K100952 Modification to Synthes Matrix System3 generations back · 2010
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −13 | K853033 | Hartshill Rect & Wires, Spinal Fixation System | A.W. Showell (Surgicraft), Ltd. | 1985 | — |
| −12 | K965221 | Ransford Cervical Fixation System | Surgicraft, Ltd. | 1997 | — |
| −11 | K982322 | Synthes Spine Occipital-Cervical Plate/Rod and Hook System | Synthes (Usa) | 1998 | — |
| −10 | K002733 | Summit Occipito-Cervico-Thoracic (Oct) Spinal System | Depuyacromed | 2000 | — |
| −9 | K013222 | Summit Occipito-Cervico- Thoracic (Oct) Spinal System | Depuyacromed | 2001 | — |
| −8 | K022190 | Modification to Summit Occipito-Cervico-Thoracic (Oct) Spinal System | Depuyacromed | 2002 | — |
| −7 | K030103 | Summit Oct Spinal System Minipolyaxial Screws | Depuyacromed | 2003 | — |
| −6 | K041203 | Summit Oct Spinal System | Depuy Spine, Inc. | 2004 | — |
| −5 | K062174 | Modification to Expedium Spine System | Depuy Spine, Inc. | 2006 | — |
| −4 | K070387 | Expedium Spine System | Depuy Spine, Inc. | 2007 | — |
| −3 | K102249 | Expedium Spine System | Depuy Spine, A Johnson & Johnson Company | 2010 | — |
| −2 | K142835 | Iliad Pedicle Screw System and Zenius Pedicle Screw System | Medyssey USA, Inc. | 2015 | — |
| −1 | K171509 | Iliad® Pedicle Screw System and Zenius® Pedicle Screw System | Medyssey USA, Inc. | 2017 | — |
| 0 (this device) | K181978 | Zenius™, Iliad™ and Kora™ Spinal Fixation Systems | Medyssey USA, Inc. | 2018 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 13 | 0 |
| 2001 | 11 | 0 |
| 2002 | 11 | 0 |
| 2003 | 13 | 0 |
| 2004 | 11 | 0 |
| 2005 | 15 | 0 |
| 2006 | 7 | 0 |
| 2007 | 8 | 0 |
| 2008 | 8 | 0 |
| 2009 | 8 | 0 |
| 2010 | 8 | 1 |
| 2011 | 2 | 0 |
| 2013 | 2 | 0 |
| 2017 | 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.
1 device in this family has a Class I recall. 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 NKB device
- #1 K223494 CD Horizon Spinal Systemscore 40.4 · 30 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 |
|---|---|---|---|
| * | K171526 | Zenius™, lliad™ and Kora™ Spinal Fixation SystemsSummary page 4…Class II Product Codes: NKB Primary Predicate Device: Zenius™, Iliad ™ and Kora™ Spinal Fixation Systems (K171526, K171509) Indications for Use: The Medyssey Co, Ltd. Zenius™, Iliad™ and Kora™ Spinal Fixation Systems are intended for posterio… | 2017 |
| * | K171509 | Iliad® Pedicle Screw System and Zenius® Pedicle Screw SystemSummary page 4…Class II Product Codes: NKB Primary Predicate Device: Zenius™, Iliad ™ and Kora™ Spinal Fixation Systems (K171526, K171509) Indications for Use: The Medyssey Co, Ltd. Zenius™, Iliad™ and Kora™ Spinal Fixation Systems are intended for posterior, noncer… | 2017 |
What descends from it?
No later submission names this one as a predicate yet.
Has anything in its family been recalled? (1 Class I)
No FDA recall names this device.
Relatives with a Class I recall
Class I is FDA’s most serious recall class. A recall in the family tree is context for this device, not evidence about it.
- K100952Modification to Synthes Matrix SystemSynthes Spine · 2010 · 3 generations back · ◆ in the 2010 ancestors bar of FIG. 11 Class I recall
What does this lineage say?
- The line of descent spans 33 years and passes through 7 companies; a new generation was cleared every 1.3 years on median.
- 15 of the 156 ancestors have a recall of any class; 1 has a Class I recall.
- 1 other device also cites its predicate K171526.
How does its category compare?
All NKB devicesNKB Thoracolumbosacral Pedicle Screw System: FDA decisions, review times, recalls and adverse event reports over 20 years. 2018, this device’s year, is highlighted.
FDA decisions per year · NKB
24in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · NKB
61in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · NKB
1in 2025
Class I (1 since 2007) Class II/III not classified
Adverse event reports per year · NKB
1,171in 2025
MAUDE reports naming product code NKB, 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 | 38 | 87 | 4 | 34 |
| 2008 | 36 | 59 | 5 | 82 |
| 2009 | 44 | 71 | 33 | 171 |
| 2010 | 37 | 111 | 4 | 462 |
| 2011 | 48 | 84 | 3 | 577 |
| 2012 | 60 | 79 | 13 | 1,747 |
| 2013 | 35 | 73 | 0 | 1,962 |
| 2014 | 46 | 90 | 3 (1) | 1,671 |
| 2015 | 55 | 90 | 3 | 1,446 |
| 2016 | 50 | 84 | 1 | 1,585 |
| 2017 | 63 | 69 | 1 | 1,618 |
| 2018 | 56 | 61 | 3 | 1,684 |
| 2019 | 39 | 84 | 1 | 1,915 |
| 2020 | 48 | 68 | 1 | 2,076 |
| 2021 | 32 | 61 | 0 | 1,745 |
| 2022 | 34 | 88 | 5 | 1,339 |
| 2023 | 44 | 72 | 2 | 919 |
| 2024 | 39 | 57 | 3 | 1,614 |
| 2025 | 24 | 61 | 1 | 1,171 |
| 2026 | 30 | 91 | 3 | — |
What is it indicated for?
The Medyssey Co, Ltd. Zenius™, Iliad™ and Kora™ Spinal Fixation Systems are intended for posterior, noncervical pedicle fixation as an adjunct to fusion in skeletally mature patients using autograft and/ or allograft for the following indications: degenerative disc disease (DDD) (defined as back pain of discogenic origin with degeneration of the disc confirmed by history and radiographic studies); spondylolisthesis; trauma (i.e., fracture or dislocation): spinal stenosis; curvatures (i.e., scoliosis, kyphosis, and/or lordosis); tumor; pseudoarthrosis; and failed previous fusion.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K181978 · printed Nov 6, 2026
Cite this page
510(k) Report. “K181978: Zenius™, Iliad™ and Kora™ Spinal Fixation Systems.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K181978
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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