V-STEADY and V-FAST bone cements are indicated for the treatment of pathological fractures of the vertebral body due to osteoporosis, cancer, or benign lesions using a vertebroplasty or balloon kyphoplasty procedure.
Device Story
V-STEADY and V-FAST are PMMA-based bone cements for percutaneous vertebral augmentation; vertebroplasty or balloon kyphoplasty. Self-curing system; powder component (PMMA beads, benzoyl peroxide initiator, zirconium dioxide radiopacifier) mixed with liquid component (methylmethacrylate monomer, DMPT accelerator, hydroquinone stabilizer). V-STEADY provides high viscosity with immediate development; V-FAST provides low initial viscosity with longer working time. Used in clinical settings by physicians. Cements injected into vertebral body to stabilize fractures; radiopacifier allows visualization under fluoroscopy. Benefits include structural support for fractured vertebrae. Components supplied sterile; ethylene oxide sterilization used for packaging.
Clinical Evidence
Bench testing only. No clinical data provided. Performance characterized via biocompatibility testing (ISO 10993), sterilization validation (ISO 11135, 11138, 11737, 13408, 14161, 14937), and mechanical/chemical testing (ASTM F451-08, ISO 5833:2002, ASTM F2118-14, ASTM D2990-09, ASTM D638, ASTM E399-12).
Technological Characteristics
PMMA-based bone cement. Powder: PMMA, ZrO2, Benzoyl Peroxide. Liquid: MMA, DMPT, Hydroquinone. Sterilization: Ethylene oxide. Standards: ASTM F451-08, ISO 5833:2002, ASTM F2118-14, ASTM D2990-09, ASTM D638, ASTM E399-12, ISO 10993, ISO 11135:2014.
Indications for Use
Indicated for patients with pathological vertebral body fractures caused by osteoporosis, cancer, or benign lesions requiring vertebroplasty or balloon kyphoplasty.
Regulatory Classification
Identification
Polymethylmethacrylate (PMMA) bone cement is a device intended to be implanted that is made from methylmethacrylate, polymethylmethacrylate, esters of methacrylic acid, or copolymers containing polymethylmethacrylate and polystyrene. The device is intended for use in arthroplastic procedures of the hip, knee, and other joints for the fixation of polymer or metallic prosthetic implants to living bone.
Special Controls
*Classification.* Class II (special controls). The special control for this device is the FDA guidance document entitled “Class II Special Controls Guidance Document: Polymethylmethacrylate (PMMA) Bone Cement.”
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Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter. Inside the circle is a stylized graphic of three human profiles facing to the right, stacked one on top of the other.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
December 14, 2015
G21 S.r.l. Mr. Maurizio Foroni President Via Sandro Pertini, 8 41039 San Possidonio (MO) ITALY
Re: K150408
Trade/Device Name: V-STEADY and V-FAST Regulation Number: 21 CFR 888.3027 Regulation Name: Polymethylmethacrylate (PMMA) bone cement Regulatory Class: Class II Product Code: LOD, NDN Dated: October 30, 2015 Received: November 2, 2015
Dear Mr. Foroni:
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 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
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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 contact the Division of Industry and Consumer Education 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. 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/ReportaProblem/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 Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours,
# Mark N. Melkerson -S
Mark N. Melkerson Director Division of Orthopedic Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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| DEPARTMENT OF HEALTH AND HUMAN SERVICES | Form Approved: OMB No. 0910-0120 |
|-----------------------------------------|-----------------------------------|
| Food and Drug Administration | Expiration Date: January 31, 2017 |
| Indications for Use | See PRA Statement below. |
| 510(k) Number (if known)<br>K150408 | |
Device Name V-STEADY and V-FAST
#### Indications for Use (Describe)
V-STEADY and V-FAST bone cements are indicated for the treatment of pathological fractures of the vertebral body due to osteoporosis, cancer, or benign lesions using a vertebroplasty or balloon kyphoplasty procedure.
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)
PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON A SEPARATE PAGE IF NEEDED.
FOR FDA USE ONLY
Concurrence of Center for Devices and Radiological Health (CDRH) (Signature)
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."
FORM FDA 3881 (1/14)
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# 510(k) Summary
This 510(k) Summary has being submitted in accordance with the requirements of 21 CFR 807.92 and the FDA's guidance The 510(k) Program: Evaluating Substantial Equivalence in Premarket Notification [510(k)].
| 1. General Information | |
|---------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Submitter: | G21 srl<br>via S. Pertini, 8<br>41039 San Possidonio (MO)- ITALY<br>Phone: +39 0535 30312<br>Fax: +39 0535 417332 |
| Contact Person in Italy: | Maurizio Foroni<br>Via S. Pertini, 8<br>41039 San Possidonio (MO)-ITALY<br>Phone: +39 0535 30312<br>Fax: +39 0535 417332<br>Email: info@g-21.it |
| Contact Person in USA: | M Squared Associates, Inc.<br>575 8th Avenue, Suite 1212<br>New York, NY 10018<br>Marie Marlow<br>Telephone 703-562-9800 x201<br>Deborah Lavoie Grayeski<br>Telephone 703-562-9800 x250<br>Email:<br>dgrayeski@msquaredassociates.com |
| Summary Preparation Date: | December 4, 2015 |
| 2. Device | |
| Device Name: | V-STEADY and V-FAST |
| Classification name: | Polymethylmethacrylate (PMMA)<br>bone cement |
| Product Code: | LOD<br>NDN |
| Regulation number: | 888.3027 |
| Class: | II |
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## 3. Predicate Device
The subject devices family (V-STEADY and V-FAST) is substantially equivalent to the following legally marketed predicate device:
| Applicant | Device name | 510(k) Number | Product code |
|---------------------|-------------|---------------|--------------|
| HERAEUS KULZER GMBH | OSTEOPAL®V | K050085 | LOD<br>NDN |
Additionally, reference devices, as listed below, were selected only to provide scientific or technical information to support the subject devices.
| Applicant | Device name | 510(k) Number | Product code |
|---------------------|----------------------|---------------|--------------|
| TECRES SPA | MENDEC SPINE | K042415 | LOD<br>NDN |
| STRYKER CORPORATION | STRYKER VERTAPLEX HV | K091606 | LOD<br>NDN |
## 4. Device Description
V-STEADY and V-FAST are polymethylmethacrylate (PMMA) based bone cements formulated to perform percutaneous vertebral augmentation procedures, such as vertebroplasty . Bone cements are self-curing systems consisting of liquid and powder components:
- the powder component is constituted of PMMA beads shaped particles containing the initiator benzoyl peroxide required for starting initiating the cement curing. The radiopacifier agent, zirconium dioxide, is necessary for the cement visibility under radiographs but it does not take part of the curing process (radical polymerization).
- The liquid component comprises the monomer, methylmethacrylate (MMA); dimethyl-para-toluidine (DMPT) as polymerization accelerator and hydroquinone (HQ) as stabilizer to prevent polymerization of the liquid during storage.
The specific content of PMMA and benzoyl peroxide is slightly different between the two cements conferring upon them specific properties. V-STEADY bone cement has an immediate development of viscosity and thus it is a high viscosity cement that maintains its properties throughout the useful working time. The V-FAST has a low initial viscosity and a long working time allowing to work extremely carefully when a good time margin before polymerization is required. Both the liquid and powder components are supplied sterile-filtered monomer component is supplied in an amber glass ampoule (10 ml) and comes in a blister pack sterilized by ethylene oxide. The polymer powder component is supplied in a double sterile packaging.
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## G-21 S.R.L. 510(K) PREMARKET NOTIFICATION
The sterilization process is ethylene oxide and it has been properly validated.
Preparation and application procedures of the subject devices are detailed within the labeling as Mixing Phase, Waiting Phase, Application Phase, Setting/Hardening Phase.
### 5. Indications for use
V-STEADY and V-FAST bone cements are indicated for the treatment of pathological fractures of the vertebral body due to osteoporosis, cancer, or benign lesions using a vertebroplasty or balloon kyphoplasty procedure.
#### 6. Comparison of technological characteristics with the predicate devices.
V-STEADY and V-FAST bone cements share many of the same technological characteristics compared to the predicate device, OSTEOPAL V, including fundamental features such as chemical formulation, packaging configuration, sterilization methods, mechanical performances and handling phases. There are however few differences in shelf life, presence of coloured pigment in the predicate only, as detailed in the table below:
| | G21 device family | | Predicate Device |
|-----------------------|-------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------|
| | V-STEADY | V-FAST | OSTEOPAL V (K050085) |
| | Chemical composition | | |
| Powder<br>Component | Polymethylmethacrylate (PMMA)<br>Zirconium Dioxide (ZrO2)<br>Benzoyl Peroxide (BPO) | Polymethylmethacrylate<br>(PMMA)<br>Zirconium Dioxide (ZrO2)<br>Benzoyl Peroxide (BPO) | Polymethylmethacrylate<br>(PMMA)<br>Zirconium Dioxide (ZrO2)<br>Benzoyl Peroxide (BPO) |
| Liquid<br>Component | Metylmethacrylate (MMA)<br>N,N-dymethyl-p-toluidine (DMPT)<br>Hydroquinone (HQ) | Metylmethacrylate (MMA)<br>N,N-dymethyl-p-toluidine<br>(DMPT)<br>Hydroquinone (HQ) | Metylmethacrylate (MMA)<br>N,N-dymethyl-p-toluidine<br>(DMPT)<br>Hydroquinone (HQ) |
| Other<br>constituents | None | None | Chlorophyll |
| Shelf Life | 1 year | 1 year | 5 years |
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## 7. Performance Data
The following performance data are provided in support of the substantial equivalence determination:
#### ● Biocompatibility
As recommended by the FDA's Guidance "Use of International Standard ISO-10993, "Biological Evaluation of Medical Devices Part 1: Evaluation and Testing' (Replaces #G87-1 #8294) (blue book memo), the subject devices comply with ISO 10993.
#### . Sterilization
The sterilization process (including both the ethylene oxide method (powder component and aseptically processed, filled glass vials) as well as the filter-sterilization (liquid component)) has been validated and the sterility of the subject devices has been verified according to ISO 11135:2014, ISO 11138-1:2006, ISO 10993-7:2009, ISO 14161:2009, ISO 14937:2009, ISO 11737-1:2006, ISO 11737-2:2009, ISO 13408-1:2008 and ISO 13408-2:2003.
#### ● Material, Mechanical and Performance Characterization
A comprehensive set of performance testing was conducted to characterize V-STEADY and V-FAST bone cements as compared to the predicate, according to the FDA's Guide "Class II Special Controls Guidance Document: polymethylmethacrylate (PMMA) Bone Cement; Guidance for Industry and FDA".
Results show comparable performances to the predicate and reference devices, and are in compliance with ASTM F451-08, ISO 5833:2002, ASTM F2118-14, ASTM D2990-09, ASTM D638, and ASTM E399-12.
#### 8. Conclusions
The subject device family has the same classification and intended use as the predicate device. Also, several tests were conducted as recommended by the FDA's Guide "Class II Special Controls Guidance Document: polymethylmethacrylate (PMMA) Bone Cement; Guidance for Industry and FDA" to address safety and performance characteristics (e.g. biocompatibility, sterilization, shelf life, chemical and mechanical tests). The obtained results demonstrate that the subject devices perform as intended in the specific use conditions and comply with applicable standards, similarly to the predicate device. Thus, on the basis of evidence discussed above, the V-STEADY and V-FAST can be deemed substantially equivalent to the predicate device K050085.
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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.