510(k) · Cleared

Cleared

22.2/+4MM CO CR & Zirconia Femoral Head

K970846510(k) TraditionalCleared Jun 5, 199790-day reviewClass II21 CFR 888.3353

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

Landos, Inc. · LZO Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Polymer, Cemented Or Non-Porous, Uncemented

Cleared on Jun 5, 1997 as substantially equivalent to K935185 (Landos, Inc., 1994) after a 90-day review. Its family tree reaches back 1 generation to 1994.

Decided: Jun 5, 1997
Review: 90 days
Class: Class II
Product code: LZO
Recalls: None
Predicates: 1

Its longest line of descent runs back 1 generation to K935185 (1994). No later device cites it as a predicate yet.

By dateBy generation

Root · 1 generation backK935185 Morphometric Total Hip ProsthesisLandos, Inc. · 1994
This deviceK970846 22.2/+4MM CO CR & Zirconia Femoral HeadLandos, Inc. · 1997

View FIG. 1 as a table

Line of descent and top descendants

Generation	Number	Device	Applicant	Decided	Recalls
−1	K935185	Morphometric Total Hip Prosthesis	Landos, Inc.	1994	—
0 (this device)	K970846	22.2/+4MM CO CR & Zirconia Femoral Head	Landos, Inc.	1997	—

FIG. 1 — Lineage of K970846, 1994–1997Source: FDA 510(k) summaries, read by 510(k) Report · How lineage is built

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 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

Get a 510(k) Report

What was it cleared against? (1)

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	Applicant	Decided	Recalls
*	K935185	Morphometric Total Hip Prosthesis Summary page 1 …ger, Clinical Affairs DePuy Orthopaedics, Inc. P.O.Box 988 ‘ Warsaw, IN 46581-0988 1818910 22 2/+4mm Femoral Heads 87LZ0 " ClassIT Morphometric Total Hip Prosthesis (K935185) The 22.2/+4 Femora! Head is dmguedwﬁtona 9/11 taper. Itis 22 2mm in diameter and has a neck length of +4. It is available in Zi…	Landos, Inc.	1994	—

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?

Its one ancestor has no recall.

How does its category compare?

All LZO devices

LZO 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

2007high 28 (2019) · low 7 (2009)2026

2026 to Oct 25, outlined.

Median 510(k) review, days · LZO

119in 2025

2007high 279 (2022) · low 63 (2008)2026

Receipt to decision; years with fewer than 3 clearances left blank.

Recalls per year · LZO

1in 2025

2007high 42 (2009) · low 0 (2010)2026

Class I (0 since 2007) Class II/III not classified

Adverse event reports per year · LZO

3,244in 2025

2007high 3,244 (2025) · low 125 (2008)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	—

What is it indicated for?

The intended use for the 22.2/+4 Femoral Head is to complete the assembly of a Ti-6Al-4V semi-constrained femoral hip stem with a 9/11 Morse-like taper, identical to the taper of the Morphometric Hip, manufactured by Medinov-AMP. The indications for use are arthritis, arthrosis or any joint disease at the hip level, osteosynthesis, failed previous surgery or joint reconstruction.

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/K970846 · printed Nov 4, 2026

Cite this page

510(k) Report. “K970846: 22.2/+4MM CO CR & Zirconia Femoral Head.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K970846

Report an extraction error

Are you the manufacturer?

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