The VariAx 2 Mini Fragment System is indicated for fracture fixation, replantation, stabilization, reduction, fusions, osteotomies, mal-unions of small bones and small bone fragments including normal and osteopenic bones in adult and adolescent (12 - 21 years) patients. The system is also indicated for non-load bearing stabilization and reduction of bone fragments in long bones. The VariAx 2 System is indicated for adult and pediatric patients, where the implant would not cross open growth plates, for the treatment of normal or osteopenic bone for the following conditions or procedures: Fracture fixation, including single, segmental, and comminuted fractures; Revision, including nonunion and malunion; Intra- and extra-articular fractures; Compression fracture; Displaced fracture; Reconstruction; Replantation; Arthrodesis; Osteotomy.
Device Story
VariAx 2 System and VariAx 2 Mini Fragment System are orthopedic internal fixation devices; components include plates, screws, and washers. Devices are manufactured from commercially pure titanium and titanium alloy with Type III anodization. Used by surgeons in clinical settings for bone stabilization, fracture fixation, and reconstruction. Implants are provided in locking and non-locking configurations. Devices are MR conditional. Clinical benefit derived from mechanical stabilization of bone fragments to facilitate healing. No software or algorithmic components.
Clinical Evidence
No clinical data. Substantial equivalence established via non-clinical bench testing, including torsion, insertion torque, pull-out, and four-point bending tests, alongside MR compatibility assessments.
Technological Characteristics
Materials: Commercially pure titanium and titanium alloy with Type III anodization. Components: Plates, screws, washers. Locking and non-locking options. MR conditional. No software or electronic components.
Indications for Use
Indicated for adult and adolescent (12-21 years) patients for small bone/fragment fracture fixation, replantation, stabilization, reduction, fusions, osteotomies, mal-unions, and non-unions; non-load bearing stabilization of long bone fragments. Also indicated for adult and pediatric patients (excluding open growth plates) for fracture fixation (single, segmental, comminuted), revision (nonunion/malunion), intra/extra-articular fractures, compression/displaced fractures, reconstruction, replantation, arthrodesis, and osteotomy in normal or osteopenic bone.
Regulatory Classification
Identification
Single/multiple component metallic bone fixation appliances and accessories are devices intended to be implanted consisting of one or more metallic components and their metallic fasteners. The devices contain a plate, a nail/plate combination, or a blade/plate combination that are made of alloys, such as cobalt-chromium-molybdenum, stainless steel, and titanium, that are intended to be held in position with fasteners, such as screws and nails, or bolts, nuts, and washers. These devices are used for fixation of fractures of the proximal or distal end of long bones, such as intracapsular, intertrochanteric, intercervical, supracondylar, or condylar fractures of the femur; for fusion of a joint; or for surgical procedures that involve cutting a bone. The devices may be implanted or attached through the skin so that a pulling force (traction) may be applied to the skeletal system.
Predicate Devices
Smith & Nephew Variable-Angle Locking Mini-Fragment Plating System (K132886)
Synthes (USA) Modular Mini Fragment LCP System (K063049)
Submission Summary (Full Text)
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August 23, 2019
Stryker GmbH Sanja Jahr Senior Regulatory Affairs Specialist 325 Corporate Drive Mahwah, New Jersey 07430
Re: K191412
Trade/Device Name: VariAx 2 System, VariAx 2 Mini Fragment System Regulation Number: 21 CFR 888.3040 Regulation Name: Smooth Or Threaded Metallic Bone Fixation Fastener Regulatory Class: Class II Product Code: HWC, HRS Dated: May 24, 2019 Received: May 28, 2019
Dear Sanja Jahr:
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. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. 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
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statutes and regulations administered by other Federal agencies. You must 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 of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS)
regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Shumaya Ali. MPH Assistant Director DHT6C: Division of Restorative, Repair and Trauma Devices OHT6: Office of Orthopedic Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
List of Cleared Devices in K191412
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## List of Cleared Devices in K191412
- 1. VariAx 2 Mini Fragment System
- 2. VariAx 2 System
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# Indications for Use
510(k) Number (if known) K191412
Device Name VariAx 2 Mini Fragment System
#### Indications for Use (Describe)
The VariAx 2 Mini Fragment System is indicated for fracture fixation, replantation, stabilization, reduction, fusions, osteotomies, mal-unions of small bones and small bone fragments including normal and osteopenic bones in adult and adolescent (12 - 21 years) patients. The system is also indicated for non-load bearing stabilization and reduction of bone fragments in long bones.
Type of Use (Select one or both, as applicable)
| <label><input checked="checked" type="checkbox"/> Prescription Use (Part 21 CFR 801 Subpart D)</label> |
|--------------------------------------------------------------------------------------------------------|
| <label><input type="checkbox"/> Over-The-Counter Use (21 CFR 801 Subpart C)</label> |
### CONTINUE ON A SEPARATE PAGE IF NEEDED.
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# Indications for Use
510(k) Number (if known)
#### K191412
Device Name VariAx 2 System
Indications for Use (Describe)
The VariAx 2 System is indicated for adult and pediatric patients, where the implant would not cross open growth plates, for the treatment of normal or osteopenic bone for the following conditions or procedures:
- · Fracture fixation, including single, segmental, and comminuted fractures
- · Revision, including nonunion and malunion
- · Intra- and extra-articular fractures
- · Compression fracture
- Displaced fracture
- · Reconstruction
- · Replantation
- Arthrodesis
- · Osteotomy
| Type of Use (Select one or both, as applicable) | |
|-------------------------------------------------|--|
| | |
|× | Prescription Use (Part 21 CFR 801 Subpart D)
| | Over-The-Counter Use (21 CFR 801 Subpart C)
### CONTINUE ON A SEPARATE PAGE IF NEEDED.
This section applies only to requirements of the Paperwork Reduction Act of 1995.
### *DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW.*
The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to:
> Department of Health and Human Services Food and Drug Administration Office of Chief Information Officer Paperwork Reduction Act (PRA) Staff PRAStaff(@fda.hhs.gov
"An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number."
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| Proprietary Name: | VariAx 2 Mini Fragment System |
|-------------------------|----------------------------------------------------------------|
| | VariAx 2 System |
| Common Name: | Bone screw |
| | Bone plate |
| Regulation Description: | Single/multiple component metallic bone fixation appliances |
| | and accessories. |
| | Smooth or threaded metallic bone fixation fastener. |
| Regulation Number: | 21 CFR 888.3030 |
| | 21 CFR 888.3040 |
| Product Code: | HRS |
| | HWC |
| Device Class: | Class II |
| Sponsor: | Stryker GmbH |
| | Bohnackerweg l |
| | 2545 Selzach / Switzerland |
| Contact Person: | Sanja Jahr |
| | Senior Regulatory Affairs Specialist |
| | 325 Corporate Drive |
| | Mahwah, NJ 07430 |
| | Phone: 201-831-6797 |
| | Fax: 201-831-6020 |
| Date Prepared: | May 24, 2019 |
| Predicate Device: | VariAx 2 Mini Fragment System |
| | Primary Predicate: Smith & Nephew Variable-Angle Locking |
| | Mini-Fragment Plating System (K132886) |
| | Reference Device: Synthes (USA) Modular Mini Fragment LCP |
| | System (K063049) |
| | VariAx 2 System<br>Primary Predicate: VariAx 2 System (180500) |
| | |
## 510(k) Summary
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### Description
The VariAx 2 Mini Fragment System is used for internal fixations and is composed of sterile and nonsterile plates. Additionally, the plates are provided in locking and non-locking options, as well as various lengths, thicknesses, and configurations.
The VariAx 2 System is used for internal fixation applications and is composed of sterile and nonsterile screws, washers, and instruments. In addition to independent use, screws of this system are also used with compatible, internal fixation systems. These devices are made of commercially pure titanium and titanium alloy with Type III anodization, and are available in a variety of sizes and diameters, as well as locking and non-locking types.
### Indications for Use
### VariAx 2 Mini Fragment System
The VariAx 2 Mini Fragment System is indicated for fracture fixation, replantation, stabilization, reduction, fusions, osteotomies, mal-unions, and non-unions of small bones and small bone fragments including normal and osteopenic bones in adult and adolescent (12 – 21 years) patients. The system is also indicated for non-load bearing stabilization and reduction of bone fragments in long bones.
### VariAx 2 System
The VariAx 2 System is indicated for adult and pediatric patients, where the implant would not cross open growth plates, for the treatment of normal or osteopenic bone for the following conditions or procedures:
- · Fracture fixation, including single, segmental, and comminuted fractures
- · Revision, including nonunion and malunion
- Intra- and extra-articular fractures
- · Compression fracture
- Displaced fracture
- · Reconstruction
- · Replantation
- · Arthrodesis
- Osteotomy
### Summary of Technologies
A comparison of the systems demonstrated that the VariAx 2 Mini Fragment System and the VariAx 2 System are substantially equivalent to the previously cleared Synthes (USA) Modular Mini Fragment LCP System (K063049), Smith & Nephew Variable-Angle Locking Mini-Fragment Plating System (K132886), and VariAx 2 System (K180500) in regard to intended use, material, design, and operational principles.
### Non-Clinical Testing
Comparative mechanical testing to the predicate system demonstrated substantial equivalence. The following tests were performed:
- Torsion
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VariAx 2 Mini Fragment System & VariAx 2 System Stryker GmbH
- . Insertion Torque
- . Pull-out
- . Four-point bending
The aforementioned testing demonstrated that the VariAx 2 Mini Fragment System and the VariAx 2 System are substantially equivalent to the predicate devices. Additionally, MR assessments of magnetically-induced displacement force, magnetically-induced torque, RF-induced heating, and image artifacts demonstrate that the VariAx 2 Mini Fragment System and the VariAx 2 System are MR conditional.
### Clinical Testing
This submission does not require clinical testing.
### Conclusion
The VariAx 2 Mini Fragment System and the VariAx 2 System described in this submission have the same indications, intended use, target patient population, technological characteristics, and materials as the predicate devices. The mechanical testing demonstrates the performance of the proposed devices is equivalent to the predicate devices.
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
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.