1) Adhesion of metal posts, metal inlays, onlays, crown and bridges. 2) Repair of fractures resin-based facing crowns and porcelain-fused metal crowns 3) Fabrication of removable dentures with metal base, clasp or attachment. Repair of dentures
Device Story
ALLOY PRIMER is a dental adhesive primer used by dental practitioners or technicians to bond dental metal alloys to resin-based materials. The device consists of methacrylate monomers and solvent. It is applied to metal surfaces to facilitate adhesion during the placement of metal restorations (posts, inlays, onlays, crowns, bridges), the repair of resin-based or porcelain-fused metal crowns, and the fabrication or repair of removable dentures. By improving the bond between metal and resin, the primer enhances the structural integrity of dental restorations and prosthetics, potentially increasing the longevity of the repair or device.
Clinical Evidence
No clinical data. The submission relies on the determination of substantial equivalence to the predicate device based on identical composition and intended use.
Technological Characteristics
Resin tooth bonding agent (21 CFR 872.3200). Composition: methacrylate monomers and solvent. Liquid form factor for topical application. Standalone chemical product.
Indications for Use
Indicated for dental practitioners or technicians requiring adhesion of metal posts, inlays, onlays, crowns, and bridges; repair of fractured resin-based facing crowns and porcelain-fused metal crowns; and fabrication or repair of removable dentures with metal bases, clasps, or attachments.
Regulatory Classification
Identification
A resin tooth bonding agent is a device material, such as methylmethacrylate, intended to be painted on the interior of a prepared cavity of a tooth to improve retention of a restoration, such as a filling.
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## INC. I Material Department , 1-Chome, Umeda, Kita-ku, Osaka 530-8611, JAPAN 81-6-348-2603
K012436
# SEP - 4 2001
# 510(k) SUMMARY
### 1. Submitter
| 1) Name | KURARAY MEDICAL INC. |
|-----------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2) Address | 1621 Sakazu, Kurashiki, Okayama 710-8622, Japan |
| 3) Contact person | Koji Nishida<br>DENTAL MATERIAL DEPARTMENT |
| 4) Date | July 23, 2001 |
| 5) Contact person in U.S.A. | Masaya Sasaki<br>30th Fl. Metlife Building, 200 Park Avenue, New York<br>NY 10166<br>Telephone : (212)-986-2230<br>1(800)-879-1676<br>Facsimile : (212)-867-3543 |
#### 2. Name of Device
| 1) Proprietary Name | ALLOY PRIMER |
|------------------------|--------------------------------------------|
| 2) Classification Name | Resin tooth bonding agent (21CFR 872.3200) |
| 3) Common/Usual Name | Metal adhesive primer |
### 3. Predicate device:
Kuraray Co., Ltd. will transfer the medical device business and the relevant functions including manufacturing facilities to its subsidiary company named Kuraray Medical Inc. on October 1st 2001. The aim of 510(k) submission is to alter the name and address of manufacturer, and not to intend other changes.
The predicate device is as follow.
1. ALLOY PRIMER by Kuraray Co., Ltd. (K974089)
### 4. Description for the premarket notification
ALLOY PRIMER is an adhesion primer between dental metal alloy and resin-based material for dental practitioner or dental technician, and comprises methacrylate monomers and solvent. It is used a kind of bonding agent between metal and/or tooth substrate using resin-based materials for the intended uses. Therefore this product is classified into the resin tooth bonding agent, CFR 21 Section 872.3200.
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#### 5. Statement of the intended use
The intended uses of this device are as follows. They are completely the same as ALLOY PRIMER manufactured by Kuraray Co., Ltd. (K974089).
- 1) Adhesion of metal posts, metal inlays, onlays, crown and bridges.
- 2) Repair of fractures resin-based facing crowns and porcelain-fused metal crowns
- 3) Fabrication of removable dentures with metal base, clasp or attachment. Repair of dentures
#### 6. Statement of the technological characteristics and safety
This device is essentially the same as ALLOY PRIMER manufactured by Kuraray Co., Ltd. Therefore the technological characteristics, chemical ingredients and safety of this (K974089). device are completely the same as ALLOY PRIMER.
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DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/2/Picture/1 description: The image is a logo for the U.S. Department of Health & Human Services. The logo consists of a stylized caduceus symbol, which is a staff with two snakes coiled around it, and the words "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" arranged in a circular fashion around the symbol. The logo is black and white.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
SEP = 4 2001
Kuraray Medical, Incorporated C/O Ms. Masaya Sasaki Kuraray America, Incorporated 30th Floor Metlife Building 200 Park Avenue 10166 New York, New York
K012436 Re : Modification To Alloy Primer Trade/Device Name: 872.3200 Requlation Number: Regulatory Class: II Product Code: KLE Dated: July 23, 2001 Received: July 31, 2001
Dear Ms. Sasaki:
We have reviewed your Section 510(k) notification of intent to we have levice your boosed above and we have determined the market the device force enouvalent (for the indications for use stated in the enclosure) to legally marketed predicate use stated in the cholobase, commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to the chactment acco on reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act). provisions of the reachar robe, subject to the general The general controls controls provisions of the Act. provisions of the Act include requirements for annual provisions of the not includes, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (Premarket Approval), it may (operai ochorsuch additional controls. Existing major be subject to back acabour device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 895. ਉ rederal &chartially eroses mination assumes compliance with Bubbeancially oqualizaturing Practice requirements, as set Enc Current Souality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic QS inspections, the Food and Drug Administration (FDA) will verify such assumptions. Failure to Aomilitocracion (CMP regulation may result in regulatory In addition, FDA may publish further announcements action.
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Page 2- Ms. Sasaki
concerning your device in the Federal Register. Please note: concerning your device in ence innotification submission does this response to your premarker needbase under sections 531
not affect any obligation you might have under the Electronic not allect any obligation you mages under the Electronic through 542 of the Act for acvices ander of other Federal laws or regulations.
This letter will allow you to begin marketing your device as Inis recei will arrow your of the motification. The FDA described in your 510 kr premaince of your device to a legally finding of substancial equivalence of polassification for your marketed predicate device rebares in opened to the market.
If you desire specific advice for your device on our labeling II you desire specific advice is do and additionally 809.10 for in regulation (21 crk Fare Son and Son and the Office of Compliance at (301) 594-4613. Additionally, for questions on Compliance at (501) 331 issing of your device, please contact the promocion and advercibing on Journal (301) Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR 807.97). Other general premarket notification - (2rch Joies under the Act may be Informacion on your rision of Small Manufacturers, obtained from the Division of Email - Bilained at its tollefreeddress International and Consumer-ABB-ABB-Aits Internet address (800) 636-2041 Szvirgdrh/dsma/dsmamain.html.
Sincerely yours,
Timothy A. Ulatowski
Tim Director Division of Dental, Infection Control and General Hospital Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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[ALLOY PRIMER, Kuraray Medical Inc.]
Image /page/4/Picture/1 description: The image shows a sequence of handwritten digits and a letter. The sequence starts with the letter 'K', followed by the digits '0', '1', '2', '4', '3', and '6'. The digits are written in a clear, legible style, with consistent spacing between them. The image appears to be a close-up of the handwritten sequence.
510(k) Number (if known): ____________________________________________________________________________________________________________________________________________________
Device Name: ALLOY PRIMER
## Indications for Use
Statement of the intended use
ALLOY PRIMER is indicated for the following applications:
1) Adhesion of metal posts, metal inlays, onlays, crown and bridges
2) Repair of fractures resin-based facing crowns and porcelain-fused metal crowns
3) Fabrication of removable dentures with metal base, clasp or attachment. Repair of dentures
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use_ (Part 21 CFR 801.109) OR
Over-The-Counter Use__________________________________________________________________________________________________________________________________________________________
(Optional Format 1-2-96)
(Division Sign-Off) Division of Dental, Infection Control, and General Hospital Devices 510(k) Number _
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Learn the FDA Browser
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.