510(k) · Cleared
ClearedDuo Expandable Interbody Fusion System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Spineology, Inc. · MAX Intervertebral Fusion Device With Bone Graft, Lumbar
Cleared on Feb 19, 2021 as substantially equivalent to K190055 (Spineology, Inc., 2019) and 1 other predicate after a 29-day review. Its family tree reaches back 25 generations to 1984. 1 of the 434 devices in its family, counting itself, has a Class I recall.
- Decided
- Feb 19, 2021
- Review
- 29 days
- Class
- Class II
- Product code
- MAX
- Recalls
- None
- Predicates
- 2
Its longest line of descent runs back 25 generations to K841189 (1984). 433 ancestors in all, the oldest K792352 (1979). No later device cites it as a predicate yet. 1 of the 434 devices in this family, counting this one, has a Class I recall.
- Root · 25 generations backK841189 Oec/Rezaian Spinal FixatorOrthopedic Equipment Co., Inc. · 1984
- 21 generations between
- 3 generations backK181453 ATEC ALIF Spacer SystemAlphatec Spine, Inc. · 2018
- 2 generations backK182746 ATEC ALIF and LLIF Spacer SystemAlphatec Spine, Inc. · 2018
- 1 generation backK183705 IdentiTi Porous Ti Interbody SystemAlphatec Spine, Inc. · 2019
- This deviceK210155 Duo Expandable Interbody Fusion SystemSpineology, Inc. · 2021
Show all 25 generations
- Root · 25 generations backK841189 Oec/Rezaian Spinal FixatorOrthopedic Equipment Co., Inc. · 1984
- 24 generations backK990148 Stackable Cage SystemDepuy Motech Acromed · 1999
- 23 generations backK003043 Surgical Titanium Mesh SystemDepuyacromed · 2001
- 22 generations backK022793 Tetris Spinal ImplantSignus Medical, LLC · 2003
- 21 generations backK031757 Peek Tetris Spinal ImplantSignus Medical, LLC · 2003
- 20 generations backK041888 Curved Peek Tetris Spinal ImplantSignus Medizintechnik GmbH · 2004
- 19 generations backK042930 Spacevision Cage SystemSpine Vision, Inc. · 2004
- 18 generations backK062759 Paramount VBR SystemInnovative Spinal Technologies, Inc. · 2007
- 17 generations backK072120 Paramount Intervertebral Body Fusion DeviceInnovative Spinal Technologies, Inc. · 2007
- 16 generations backK073291 Capstone Spinal SystemMedtronic Sofamor Danek USA, Inc. · 2008
- 15 generations backK094025 Crescent Spinal SystemMedtronic Sofamor Danek · 2010
- 14 generations backK110543 Crescent (R) Spinal System TitaniumMedtronic Sofamor Danek USA, Inc. · 2011
- 13 generations backK121683 Acculif TL CageCoalign Innovations, Inc. · 2012
- 12 generations backK123752 Acculif TL and PL CageCoalign Innovations, Inc. · 2013
- 11 generations backK132505 Acculif TL and PL CageCoalign Innovations, Inc. · 2013 · Recalled
- 10 generations backK141217 Acculif TL and PL CageStryker Corporation · 2014 · Recalled
- 9 generations backK143163 AVS® AL and ALign PEEK Spacers, AVS® PL and UniLIF PEEK Spacers…Stryker Corporation · 2015
- 8 generations backK153782 NuVasive® Lumbar Interbody ImplantsNu Vasive, Incorporated · 2016
- 7 generations backK161230 NuVasive Lumbar Interbody ImplantsNu Vasive, Incorporated · 2016
- 6 generations backK170962 NuVasive® CoRoent® Thoracolumbar SystemNu Vasive, Incorporated · 2017
- 5 generations backK171633 NuVasive TLX Interbody SystemNu Vasive, Incorporated · 2017
- 4 generations backK180480 ATEC Universal Spacer SystemAlphatec Spine, Inc. · 2018
- 3 generations backK181453 ATEC ALIF Spacer SystemAlphatec Spine, Inc. · 2018
- 2 generations backK182746 ATEC ALIF and LLIF Spacer SystemAlphatec Spine, Inc. · 2018
- 1 generation backK183705 IdentiTi Porous Ti Interbody SystemAlphatec Spine, Inc. · 2019
- This deviceK210155 Duo Expandable Interbody Fusion SystemSpineology, Inc. · 2021
Class I recalls in this family
- K073202 Ardis Spacer7 generations back · 2008
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −25 | K841189 | Oec/Rezaian Spinal Fixator | Orthopedic Equipment Co., Inc. | 1984 | — |
| −24 | K990148 | Stackable Cage System | Depuy Motech Acromed | 1999 | — |
| −23 | K003043 | Surgical Titanium Mesh System | Depuyacromed | 2001 | — |
| −22 | K022793 | Tetris Spinal Implant | Signus Medical, LLC | 2003 | — |
| −21 | K031757 | Peek Tetris Spinal Implant | Signus Medical, LLC | 2003 | — |
| −20 | K041888 | Curved Peek Tetris Spinal Implant | Signus Medizintechnik GmbH | 2004 | — |
| −19 | K042930 | Spacevision Cage System | Spine Vision, Inc. | 2004 | — |
| −18 | K062759 | Paramount VBR System | Innovative Spinal Technologies, Inc. | 2007 | — |
| −17 | K072120 | Paramount Intervertebral Body Fusion Device | Innovative Spinal Technologies, Inc. | 2007 | — |
| −16 | K073291 | Capstone Spinal System | Medtronic Sofamor Danek USA, Inc. | 2008 | — |
| −15 | K094025 | Crescent Spinal System | Medtronic Sofamor Danek | 2010 | — |
| −14 | K110543 | Crescent (R) Spinal System Titanium | Medtronic Sofamor Danek USA, Inc. | 2011 | — |
| −13 | K121683 | Acculif TL Cage | Coalign Innovations, Inc. | 2012 | — |
| −12 | K123752 | Acculif TL and PL Cage | Coalign Innovations, Inc. | 2013 | — |
| −11 | K132505 | Acculif TL and PL Cage | Coalign Innovations, Inc. | 2013 | 3 |
| −10 | K141217 | Acculif TL and PL Cage | Stryker Corporation | 2014 | 3 |
| −9 | K143163 | AVS® AL and ALign PEEK Spacers, AVS® PL and UniLIF PEEK Spacers, AVS® TL PEEK… | Stryker Corporation | 2015 | — |
| −8 | K153782 | NuVasive® Lumbar Interbody Implants | Nu Vasive, Incorporated | 2016 | — |
| −7 | K161230 | NuVasive Lumbar Interbody Implants | Nu Vasive, Incorporated | 2016 | — |
| −6 | K170962 | NuVasive® CoRoent® Thoracolumbar System | Nu Vasive, Incorporated | 2017 | — |
| −5 | K171633 | NuVasive TLX Interbody System | Nu Vasive, Incorporated | 2017 | — |
| −4 | K180480 | ATEC Universal Spacer System | Alphatec Spine, Inc. | 2018 | — |
| −3 | K181453 | ATEC ALIF Spacer System | Alphatec Spine, Inc. | 2018 | — |
| −2 | K182746 | ATEC ALIF and LLIF Spacer System | Alphatec Spine, Inc. | 2018 | — |
| −1 | K183705 | IdentiTi Porous Ti Interbody System | Alphatec Spine, Inc. | 2019 | — |
| 0 (this device) | K210155 | Duo Expandable Interbody Fusion System | Spineology, Inc. | 2021 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1990 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 9 | 0 |
| 2001 | 15 | 0 |
| 2002 | 13 | 0 |
| 2003 | 19 | 0 |
| 2004 | 30 | 0 |
| 2005 | 23 | 0 |
| 2006 | 16 | 0 |
| 2007 | 18 | 0 |
| 2008 | 50 | 1 |
| 2009 | 31 | 0 |
| 2010 | 19 | 0 |
| 2011 | 27 | 0 |
| 2012 | 19 | 0 |
| 2013 | 25 | 0 |
| 2014 | 22 | 0 |
| 2015 | 13 | 0 |
| 2016 | 7 | 0 |
| 2017 | 6 | 0 |
| 2018 | 4 | 0 |
| 2019 | 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 MAX device
- #1 K203714 NuVasive Thoracolumbar Interbody Systems…score 102.5 · 24 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 |
|---|---|---|---|
| * | K190055 | Duo Lumbar Interbody Fusion DeviceSummary page 4…MAX Regulatory Class: Class II Regulation Number: 21 CFR 888.3080 Panel: Orthopedic Predicate Devices Primary: K190055 Duo™ Lumbar Interbody Fusion Device Additional: K183705 IdentiTi™ Porous Ti Interbody System 1. P… | 2019 |
| * | K183705 | IdentiTi Porous Ti Interbody SystemSummary page 4…21 CFR 888.3080 Panel: Orthopedic Predicate Devices Primary: K190055 Duo™ Lumbar Interbody Fusion Device Additional: K183705 IdentiTi™ Porous Ti Interbody System 1. Purpose The purpose of this premarket notification is to obtain FDA clearan… | 2019 |
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.
- K073202Ardis SpacerAbbott Spine, Inc. · 2008 · 7 generations back · ◆ in the 2008 ancestors bar of FIG. 11 Class I recall
What does this lineage say?
- The line of descent spans 37 years and passes through 14 companies; a new generation was cleared every 9 months on median.
- 46 of the 433 ancestors have a recall of any class; 1 has a Class I recall.
How does its category compare?
All MAX devicesMAX Intervertebral Fusion Device With Bone Graft, Lumbar: FDA decisions, review times, recalls and adverse event reports over 20 years. 2021, this device’s year, is highlighted.
FDA decisions per year · MAX
29in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · MAX
85in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · MAX
5in 2025
Class I (1 since 2007) Class II/III not classified
Adverse event reports per year · MAX
811in 2025
MAUDE reports naming product code MAX, 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 | 7 | 86 | 0 | 12 |
| 2008 | 35 | 88 | 2 | 19 |
| 2009 | 31 | 102 | 9 | 90 |
| 2010 | 29 | 137 | 0 | 154 |
| 2011 | 49 | 98 | 3 | 201 |
| 2012 | 48 | 69 | 11 (1) | 327 |
| 2013 | 58 | 102 | 0 | 380 |
| 2014 | 58 | 115 | 3 | 366 |
| 2015 | 53 | 113 | 1 | 524 |
| 2016 | 64 | 124 | 6 | 647 |
| 2017 | 76 | 116 | 1 | 596 |
| 2018 | 64 | 114 | 4 | 616 |
| 2019 | 60 | 131 | 1 | 699 |
| 2020 | 56 | 106 | 0 | 640 |
| 2021 | 53 | 109 | 0 | 622 |
| 2022 | 41 | 95 | 1 | 618 |
| 2023 | 30 | 87 | 0 | 576 |
| 2024 | 38 | 91 | 1 | 729 |
| 2025 | 29 | 85 | 5 | 811 |
| 2026 | 18 | 95 | 0 | — |
What is it indicated for?
The Duo™ Expandable Interbody Fusion System is indicated for intervertebral body fusion at one level or two contiguous levels in the lumbar spine from L2 to L5 in patients with degenerative disc disease (DDD) with up to Grade I spondylolisthesis at the involved level(s). DDD is defined as back pain of discogenic origin with degeneration of the disc confirmed by patient history and radiographic studies. These patients should be skeletally mature and have…
Read the full statement (121 words)
The Duo™ Expandable Interbody Fusion System is indicated for intervertebral body fusion at one level or two contiguous levels in the lumbar spine from L2 to L5 in patients with degenerative disc disease (DDD) with up to Grade I spondylolisthesis at the involved level(s). DDD is defined as back pain of discogenic origin with degeneration of the disc confirmed by patient history and radiographic studies. These patients should be skeletally mature and have had six months of non-operative treatment. The Duo device is designed for use with autograft and/or allograft comprised of cancellous and/or corticocancellous bone graft as an adjunct to fusion and is intended for use with supplemental fixation systems cleared by the FDA for use in the lumbar spine.
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/K210155 · printed Nov 6, 2026
Cite this page
510(k) Report. “K210155: Duo Expandable Interbody Fusion System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K210155
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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