TITAN Nail: APTUS Cannulated Compression Screws and headed Cannulated Compression Screws, including TITAN Nails, are indicated for the treatment of fractures, osteotomies and arthrodesis of bones with the appropriate screw size. APTUS K-Wire System: APTUS K-Wire System is intended for use in fixation of bone fractures, for bone reconstruction, and as guide pins for insertion of other implants.
Device Story
TITAN Nail and APTUS K-Wire System are metallic bone fixation implants. TITAN Nails are cannulated, headless, fully threaded titanium alloy screws (ASTM F136) used for fracture treatment, osteotomies, and arthrodesis. APTUS K-Wires are double-ended trocar stainless steel wires (ASTM F138) used for fracture fixation, bone reconstruction, and as guide pins. Both devices are provided sterile via X-ray beam sterilization. Used by surgeons in clinical settings for orthopedic procedures. Output is physical stabilization of bone segments; clinical decision-making relies on surgeon assessment of fracture type and appropriate implant sizing.
Clinical Evidence
No clinical data provided. Substantial equivalence supported by design-control impact assessment and existing non-clinical verification and validation data from predicate devices.
Indicated for adults requiring treatment of bone fractures, osteotomies, and arthrodesis (TITAN Nail) or bone fixation, reconstruction, and guide pin placement (APTUS K-Wire System).
Regulatory Classification
Identification
A smooth or threaded metallic bone fixation fastener is a device intended to be implanted that consists of a stiff wire segment or rod made of alloys, such as cobalt-chromium-molybdenum and stainless steel, and that may be smooth on the outside, fully or partially threaded, straight or U-shaped; and may be either blunt pointed, sharp pointed, or have a formed, slotted head on the end. It may be used for fixation of bone fractures, for bone reconstructions, as a guide pin for insertion of other implants, or it may be implanted through the skin so that a pulling force (traction) may be applied to the skeletal system.
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FDA U.S. FOOD & DRUG ADMINISTRATION
April 17, 2026
Medartis AG
Salvatore Risoli
Hochbergerstrasse 60E
Basel, 4057
Switzerland
Re: K260934
Trade/Device Name: TITAN Nail and APTUS K-Wire System
Regulation Number: 21 CFR 888.3040
Regulation Name: Smooth Or Threaded Metallic Bone Fixation Fastener
Regulatory Class: Class II
Product Code: HWC, HTY
Dated: March 16, 2026
Received: March 20, 2026
Dear Mr. Risoli:
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 (the 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 available 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.
Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device" (https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download).
U.S. Food & Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993
www.fda.gov
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K260934 - Salvatore Risoli
Page 2
Your device is also subject to, among other requirements, the Quality Management System Regulation (QMSR) (21 CFR Part 820), which includes, but is not limited to, ISO 13485 clause 7.3 (Design controls), ISO 13485 clause 8.3 (Nonconforming product), ISO 13485 clause 8.5.2 (Corrective action), and ISO 13485 clause 8.5.3 (Preventative action). Please note that regardless of whether a change requires premarket review, the QMSR requires device manufacturers to review and approve changes to device design and production (ISO 13485 clause 7.3 and ISO 13485 clause 7.5) and document changes and approvals in the Medical Device File (ISO 13485 clause 4.2.3).
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 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 Part 803) for devices or postmarketing safety reporting (21 CFR Part 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reporting-combination-products); good manufacturing practice requirements as set forth in the Quality Management System Regulation (QMSR) (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050.
All medical devices, including Class I and unclassified devices and combination product device constituent parts are required to be in compliance with the final Unique Device Identification System rule ("UDI Rule"). The UDI Rule requires, among other things, that a device bear a unique device identifier (UDI) on its label and package (21 CFR 801.20(a)) unless an exception or alternative applies (21 CFR 801.20(b)) and that the dates on the device label be formatted in accordance with 21 CFR 801.18. The UDI Rule (21 CFR 830.300(a) and 830.320(b)) also requires that certain information be submitted to the Global Unique Device Identification Database (GUDID) (21 CFR Part 830 Subpart E). For additional information on these requirements, please see the UDI System webpage at https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory-assistance/unique-device-identification-system-udi-system.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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-devices/medical-device-safety/medical-device-reporting-mdr-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/medical-devices/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-devices/device-advice-comprehensive-regulatory-assistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE
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K260934 - Salvatore Risoli
Page 3
by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Shumaya Ali -S
Shumaya Ali, M.P.H.
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
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| Indications for Use | | |
| --- | --- | --- |
| Please type in the marketing application/submission number, if it is known. This textbox will be left blank for original applications/submissions. | K260934 | ? |
| Please provide the device trade name(s). | | ? |
| TITAN Nail;
APTUS K-Wire System | | |
| Please provide your Indications for Use below. | | ? |
| TITAN Nail:
APTUS Cannulated Compression Screws and headed Cannulated Compression Screws, including TITAN Nails, are indicated for the treatment of fractures, osteotomies and arthrodesis of bones with the appropriate screw size.
APTUS K-Wire System:
APTUS K-Wire System is intended for use in fixation of bone fractures, for bone reconstruction, and as guide pins for insertion of other implants. | | |
| Please select the types of uses (select one or both, as applicable). | ☑ Prescription Use (21 CFR 801 Subpart D)
☐ Over-The-Counter Use (21 CFR 801 Subpart C) | ? |
| Please select the age group(s) for which the device(s) is to be used. | ☐ Neonates/Newborns (Birth to < 29 days old)
☐ Infants (29 days old to < 2 years old)
☐ Children (2 years old to < 12 years old)
☐ Adolescents (12 years old to < 22 years old)
☑ Adults (22 years old and greater) | ? |
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K260934
Page 1 of 2
| 510(k) #: K260934 | 510(k) Summary | Prepared on: 2026-04-13 |
| --- | --- | --- |
| Contact Details | | 21 CFR 807.92(a)(1) |
| Applicant Name | Medartis AG | |
| Applicant Address | Hochbergerstrasse 60E Basel 4057 Switzerland | |
| Applicant Contact Telephone | +41797728067 | |
| Applicant Contact | Mr. Salvatore Risoli | |
| Applicant Contact Email | Salvatore.Risoli@medartis.com | |
| Device Name | | 21 CFR 807.92(a)(2) |
| Device Trade Name | TITAN Nail;APTUS K-Wire System | |
| Common Name | Smooth or threaded metallic bone fixation fastener | |
| Classification Name | Screw, Fixation, Bone | |
| Regulation Number | 888.3040 | |
| Product Code(s) | HWC, HTY | |
| Legally Marketed Predicate Devices | | 21 CFR 807.92(a)(3) |
| Predicate # | Predicate Trade Name (Primary Predicate is listed first) | Product Code |
| K232251 | APTUS Cannulated Compression Screws | HWC |
| K202589 | APTUS K-Wire System | HTY |
| Device Description Summary | | 21 CFR 807.92(a)(4) |
| The purpose of this submission is to obtain marketing clearance for the subject device TITAN Nail and APTUS K-Wire System to expand the range of the Medartis APTUS fixation devices, previously cleared K232251, K133460, K110658 and K202589. The sterile TITAN Nail is available in three different system sizes for treatment of fractures, osteotomies and arthrodesis of bones. The sterile APTUS K-Wire System is available in two different diameters for fixation of bone fractures, for bone reconstruction, and as guide pins for insertion of other implants.The subject device TITAN Nail is manufactured from titanium alloy conforming to ASTM F136, using the same manufacturing process as the predicate device and are cannulated, headless and fully threaded in design. They are available in lengths from 12mm to 80mm and diameters ranging from 2.2 to 4.0mm. TITAN Nail implants are offered sterile (X-ray beam sterilization).The subject device APTUS K-Wire System is manufactured from stainless steel conforming to ASTM F138, using the same manufacturing process as the predicate device. They are available in length of 100mm and diameters of 0.8mm and 1.1mm and have a double-ended trocar. APTUS K-Wires are offered sterile (X-ray beam sterilization). | | |
| Intended Use/Indications for Use | | 21 CFR 807.92(a)(5) |
| TITAN Nail:APTUS Cannulated Compression Screws and headed Cannulated Compression Screws, including TITAN Nails, are indicated for the treatment of fractures, osteotomies and arthrodesis of bones with the appropriate screw size.APTUS K-Wire System: | | |
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K260934
Page 2 of 2
APTUS K-Wire System is intended for use in fixation of bone fractures, for bone reconstruction, and as guide pins for insertion of other implants.
**Indications for Use Comparison** 21 CFR 807.92(a)(5)
The TITAN Nail has the same intended use and the same indications for use as the predicate device APTUS Cannulated Compression Screws cleared under K232251.
The APTUS K-Wire System has the same intended use and the same indications for use as the predicate device APTUS K-Wire System cleared under K202589.
**Technological Comparison** 21 CFR 807.92(a)(6)
TITAN Nail is substantially equivalent to the predicate device K232251 APTUS Cannulated Compression Screws. They share the same or similar technological characteristics, materials and dimensions.
APTUS K-Wire System is substantially equivalent to the predicate device K202589 APTUS K-Wire System. They share the same or similar technological characteristics, materials and dimensions.
Any differences do not raise new questions regarding safety or effectiveness. Overall, the TITAN Nail and APTUS K-Wire System have the following similarities to the predicate devices:
- have the same intended use,
- use the same operating principles,
- incorporate the same basic designs,
- incorporate similar materials, and
- are to be sterilized using the same materials and processes.
**Non-Clinical and/or Clinical Tests Summary & Conclusions** 21 CFR 807.92(b)
An analysis of the risk documentation was performed. This determined that the original testing of the predicate devices K232251 and K202589 is not adversely affected by the modification described in this Special 510(k). Such modification does not introduce changes that affect the device's performance, safety, or effectiveness. A comprehensive design review determined that the modification is adequately evaluated by existing verification and validation (V&V) data. Because the modification does not impact the technological characteristics, performance specifications, or materials that form the basis for substantial equivalence to the predicate device, the existing non-clinical performance data remain applicable. Therefore, no additional non-clinical testing was required.
All design verification and validation activities were performed and confirm that the modified device continues to meet its design inputs and performance specifications.
The devices remain in conformity with all previously declared consensus standards within K232251 and K202589, as the modification does not impact performance attributes covered by these standards.
Clinical data is not provided in this submission.
**Conclusion:**
Based on the design-control impact assessment, existing verification and validation data, and unchanged compliance with applicable standards, no new non-clinical testing was required to support this Special 510(k) submission. The existing data continue to demonstrate that the modified device is substantially equivalent to the predicate device.
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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.
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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.
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7. Product codes and the regulations tree
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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.