The Apex Hip System is intended for primary or revision total hip replacement. The femoral hip stems and acetabular cup are intended for uncemented fixation and single use implantation. These prostheses may be used for the following conditions, as appropriate: Non-inflammatory degenerative joint disease, including osteoarthritis and avascular necrosis; Rheumatoid arthritis; Correction of functional deformity; Congenital dislocation; Revision procedures where other treatments or devices have failed; Femoral neck and trochanteric fractures of the proximal femur.
Device Story
Apex Modular Head is a prosthetic component for total hip replacement systems; provides +10.5mm offset option for 28, 32, 36, and 40 mm head diameters. Manufactured from wrought cobalt chromium; utilizes standard taper design. Intended for uncemented fixation in primary or revision hip arthroplasty. Implanted by orthopedic surgeons in clinical/hospital settings. Device restores joint function and stability in patients with degenerative joint disease, fractures, or deformities. Benefits include improved anatomical fit and joint mechanics via increased offset options.
Clinical Evidence
No clinical studies were performed. Evidence is based on bench testing: ROM analysis (ISO-21565-2007), finite element analysis (ISO-7206-4), and fatigue strength testing (ISO 7206-6, ASTM F2068-09).
Technological Characteristics
Wrought cobalt chromium per ASTM F1537. Size N taper bore per ASTM F1636-95. Head diameters: 28, 32, 36, 40 mm. Offset: +10.5 mm. Sterilization: Ethylene oxide (SAL 10^-6).
Indications for Use
Indicated for patients requiring primary or revision total hip replacement due to non-inflammatory degenerative joint disease (osteoarthritis, avascular necrosis), rheumatoid arthritis, functional deformity, congenital dislocation, failed prior treatments, or femoral neck/trochanteric fractures.
Regulatory Classification
Identification
A hip joint metal/polymer/metal semi-constrained porous-coated uncemented prosthesis is a device intended to be implanted to replace a hip joint. The device limits translation and rotation in one or more planes via the geometry of its articulating surfaces. It has no linkage across the joint. This generic type of device has a femoral component made of a cobalt-chromium-molybdenum (Co-Cr-Mo) alloy or a titanium-aluminum-vanadium (Ti-6Al-4V) alloy and an acetabular component composed of an ultra-high molecular weight polyethylene articulating bearing surface fixed in a metal shell made of Co-Cr-Mo or Ti-6Al-4V. The femoral stem and acetabular shell have a porous coating made of, in the case of Co-Cr-Mo substrates, beads of the same alloy, and in the case of Ti-6Al-4V substrates, fibers of commercially pure titanium or Ti-6Al-4V alloy. The porous coating has a volume porosity between 30 and 70 percent, an average pore size between 100 and 1,000 microns, interconnecting porosity, and a porous coating thickness between 500 and 1,500 microns. The generic type of device has a design to achieve biological fixation to bone without the use of bone cement.
ApeX-LNK Poly Acetabular Cup Liners and 36 mm Heads (K073150)
ApeX-LNK Poly Acetabular Liners and Apex Modular Head, 40mm (K100555)
Submission Summary (Full Text)
{0}------------------------------------------------
K101575 (pg 1/2)
# JUN 3 0 2010
### Apex Modular Heads, +10.5mm offset
### 04June, 2010
Submitter OMNI life science, Inc. Contact 50 O'Connell Way E. Taunton MA 02718
Radhika Pondicherry Regulatory Affairs 774-226-1852 (508) 822-6030 (fax)
| Preparation Date | 04 June 2010 |
|--------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Device Name | APEX Modular Head, +10.5mm offset |
| Trade Name | APEX Modular Head, +10.5mm offset |
| Common/Classification Name | Hip joint metal/polymer/metal semi-constrained porous-coated uncemented prosthesis |
| Regulatory Class | Class II per 21 CFR §888.3358 |
| Product Code | LPH |
| Legally Marketed Predicate Device(s) | K000788 Apex Modular Hip Stem, 28 and 32 mm heads, August 02.2000 K073150 ApeX-LNK Poly™ Acetabular Cup Liners and 36 mm Heads, February 27, 2008) K100555 ApeX-LNK Poly Acetabular Liners and Apex Modular Head, 40mm, March 29, 2010) |
| Device Description | Apex Modular Head sizes 28, 32, 36, and 40 mm with a + 10.5mm offset |
| Indications for Use | The Apex Hip System is intended for primary or revision total hip replacement. The femoral hip stems and acetabular cup are intended for uncemented fixation and single use implantation. These prostheses may be used for the following conditions, as appropriate: Non-inflammatory degenerative joint disease, including osteoarthritis and avascular necrosis; Rheumatoid arthritis; Correction of functional deformity; Congenital dislocation; Revision procedures where other treatments or devices have failed; Femoral neck and trochanteric fractures of the proximal femur. |
-
{1}------------------------------------------------
## Predicate Device Comparison
| | Apex Hip System, +10.5 offset (subject device) | Apex Modular femoral heads (K000788) (K073150) (K100555) |
|--------------------------------------------|------------------------------------------------|----------------------------------------------------------|
| Intended Use | | |
| Primary and revision total hip replacement | Yes | Yes |
| Design | | |
| Taper Design | Size "N" bore in ASTM F1636-95 | Size "N" bore in ASTM F1636-95 |
| Head Diameters | 28, 32, 36, 40 mm | 28, 32, 36, 40mm |
| Offsets (mm) | +10.5 | -3.5, +0, +3.5, +7 |
| Materials | | |
| Femoral Heads | Wrought cobalt chromium | Wrought cobalt chromium |
| Standards | ASTM F1537 | ASTM F1537 |
| PACKAGING AND STERILIZATION | | |
| Sterilization | Ethylene oxide | Ethylene oxide |
| Sal | $10^{-6}$ | $10^{-6}$ |
| Packaging | Paper Board Box, Double Tyvek inner pouch | Paper Board Box, Double Tyvek inner pouch |
Non-Clinical Test The following tests were conducted: Summary
- ROM analysis per ISO-21565-2007 .
- Finite Element Analysis per ISO-7206-4 .
- Fatigue Strength Testing per ISO 7206-6,ASTM F2068-09 .
Clinical Test Summary
No clinical studies were performed.
Conclusions
The Apex Modular Head is substantially equivalent to the predicate devices.
{2}------------------------------------------------
Image /page/2/Picture/1 description: The image shows the logo for the Department of Health & Human Services - USA. The logo is a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is a stylized image of an eagle or bird-like figure with three curved lines representing its wings or feathers.
JUN 3 0 2010
Food and Drug Administration 10903 New Hampshire Avenue Document Mail Center - WO66-0609 Silver Spring, MD 20993-0002
OMNIlife science, Inc. % Radhika Pondicherry Regulatory Affairs Specialist 50 O'Connell Way E.Taunton MA 02718
Re: K101575
Trade/Device Name: Apex Modular Head Size 28, 32, 36 and 40mm +10.5 offset Regulation Number: 888.3358 Regulation Name: Hip joint metal/polymer/metal semi-constrained porqus-coated uncemented prosthesis Regulatory Class: Class II Product Code: LPH Dated: June 4, 2010 Received: June 7, 2010
Dear Ms. Pondicherry:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA), You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must
{3}------------------------------------------------
Page 2 - Ms. Radhika Pondicherry
comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportalProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm.
Sincerely yours,
Mark N. Melkerson
Director Division of Surgical. Orthopedic and Restorative Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{4}------------------------------------------------
#### Indications for Use
510(k) Number : k101575 (pg i/i)
Device Name: Apex Modular Head, +10.5mm offset
The Apex Hip System is intended for primary or revision total hip replacement. The femoral hip stems and acetabular cup are intended for uncemented fixation and single use implantation. These prostheses may be used for the following conditions, as appropriate:
- Non-inflammatory degenerative joint disease, including osteoarthritis and avascular necrosis; .
- Rheumatoid arthritis;
- Correction of functional deformity: .
- Congenital dislocation; .
- Revision procedures where other treatments or devices have failed; .
- Femoral neck and trochanteric fractures of the proximal femur.
Prescription Use × (Part 21 CFR 801 Subpart D)
AND/OR
Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Page 1 of 1
Peter D. Rummer m2 mpf
(Division Sign-Off) Division of Surgical, Orthopedic, and Restorative Devices
510(k) Number*_*_
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Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.