510(k) · Cleared
ClearedModular Hip System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Richards Medical Co., Inc. · LZO Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Polymer, Cemented Or Non-Porous, Uncemented
Cleared on May 9, 1990 after a 90-day review. FDA has not posted a summary or statement for it, so its predicates are not known. 16 later devices descend from it.
- Decided
- May 9, 1990
- Review
- 90 days
- Class
- Class II
- Product code
- LZO
- Recalls
- None
- Predicates
- 0
16 later devices descend from it, 2 citing it directly.
- This deviceK900628 Modular Hip SystemRichards Medical Co., Inc. · 1990
- Descendant · cites it directly · 11 of its ownK935921 Zirconia Ceramic Femoral HeadSmith & Nephew Richards, Inc. · 1994
- Descendant · 2 generations on · 10 of its ownK965002 Zirconia Ceramic Femoral Heads with Foundation Forged, Textured and…Encore Orthopedics, Inc. · 1997
- Descendant · 3 generations on · 9 of its ownK990261 Plus Ceramic Head Prostheses (Alumina and Zirkonia)Plus Orthopedics · 1999
- Descendant · 4 generations on · 7 of its ownK012918 Apex Modular Alumina Femoral HeadApex Surgical, LLC · 2001
- Descendant · 5 generations on · 4 of its ownK101451 Apex Module Hip System Biolox Delta Femoral HeadOmni Life Science, Inc. · 2010
Showing 5 of 16 descendants. See all descendants
Descendants cleared per year
Most influential descendants
Showing 5 of 16 · See all- K935921Zirconia Ceramic Femoral HeadSmith & Nephew Richards, Inc. · 1994 · cites it directly11descendants
- K965002Zirconia Ceramic Femoral Heads with Foundation Forged, Textured and Porous Stems, the…Encore Orthopedics, Inc. · 1997 · 2 generations on10descendants
- K990261Plus Ceramic Head Prostheses (Alumina and Zirkonia)Plus Orthopedics · 1999 · 3 generations on9descendants
- K012918Apex Modular Alumina Femoral HeadApex Surgical, LLC · 2001 · 4 generations on7descendants
- K101451Apex Module Hip System Biolox Delta Femoral HeadOmni Life Science, Inc. · 2010 · 5 generations on4descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| 0 (this device) | K900628 | Modular Hip System | Richards Medical Co., Inc. | 1990 | — |
| +1 | K935921 | Zirconia Ceramic Femoral Head | Smith & Nephew Richards, Inc. | 1994 | — |
| +2 | K965002 | Zirconia Ceramic Femoral Heads with Foundation Forged, Textured and Porous… | Encore Orthopedics, Inc. | 1997 | — |
| +3 | K990261 | Plus Ceramic Head Prostheses (Alumina and Zirkonia) | Plus Orthopedics | 1999 | — |
| +4 | K012918 | Apex Modular Alumina Femoral Head | Apex Surgical, LLC | 2001 | — |
| +5 | K101451 | Apex Module Hip System Biolox Delta Femoral Head | Omni Life Science, Inc. | 2010 | — |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1994 | 1 | 0 |
| 1997 | 1 | 0 |
| 1999 | 1 | 0 |
| 2001 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2010 | 1 | 0 |
| 2013 | 1 | 0 |
| 2017 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
| 2024 | 3 | 0 |
| 2026 | 1 | 0 |
Sources: FDA 510(k) database (decision fields), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in LZO? 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 LZO device
- #1 K192827 Quadra-Pscore 19.3 · 10 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against?
FDA has not posted a summary or statement for it, so its predicates are not known.
What descends from it? (16)
See all 162 later devices cite it directly; ranked here by how many devices descend from each in turn.
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?
- Of its descendants, K935921 (Smith & Nephew Richards, Inc., 1994) has gone furthest, with 11 descendants of its own.
How does its category compare?
All LZO devicesLZO Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Polymer, Cemented Or Non-Porous, Uncemented: FDA decisions, review times, recalls and adverse event reports over 20 years.
FDA decisions per year · LZO
14in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · LZO
119in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · LZO
1in 2025
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · LZO
3,244in 2025
MAUDE reports naming product code LZO, 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 | 87 | 2 | 138 |
| 2008 | 11 | 63 | 13 | 125 |
| 2009 | 7 | 83 | 42 | 189 |
| 2010 | 15 | 78 | 0 | 394 |
| 2011 | 13 | 87 | 10 | 544 |
| 2012 | 14 | 98 | 14 | 963 |
| 2013 | 26 | 100 | 0 | 1,370 |
| 2014 | 13 | 85 | 1 | 1,477 |
| 2015 | 12 | 115 | 1 | 1,348 |
| 2016 | 10 | 177 | 9 | 1,728 |
| 2017 | 16 | 257 | 5 | 2,165 |
| 2018 | 18 | 163 | 2 | 3,133 |
| 2019 | 28 | 109 | 4 | 3,066 |
| 2020 | 18 | 112 | 3 | 1,963 |
| 2021 | 12 | 170 | 0 | 2,199 |
| 2022 | 11 | 279 | 4 | 1,985 |
| 2023 | 10 | 122 | 2 | 2,066 |
| 2024 | 11 | 111 | 1 | 2,586 |
| 2025 | 14 | 119 | 1 | 3,244 |
| 2026 | 9 | 102 | 0 | — |
https://510kreport.com/device/K900628 · printed Nov 6, 2026
Cite this page
510(k) Report. “K900628: Modular Hip System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K900628
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Record history
- FDA decision record loaded May 2, 2026
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026