The RetroMTA-OrthoMTA II is indicated for use as: - Orthograde root canal filling material - -Repair of root perforations during root canal therapy(endodontic therapy), or as a consequence of internal and external resorption. - -Repair of root canals as an apical plug during apexification - Root end filling - Pulp capping -
Device Story
RetroMTA-OrthoMTA II is a dental material composed of dicalcium silicate, tricalcium silicate, and tricalcium aluminate; formulated as a powder mixed into a putty for clinical application. Used by dentists/endodontists in clinical settings for root canal therapy, perforation repair, apexification, root end filling, and pulp capping. Material hardens in the oral environment to provide sealing and biocompatibility. Zirconium oxide is used as a radiopacifier, replacing bismuth oxide found in the predicate device, resulting in a shorter setting time. Device provides a physical barrier for endodontic applications, aiding in tooth preservation and healing.
Clinical Evidence
Bench testing only. Testing included ISO 6876 (setting time, solubility, radiopacity) and ISO 10993 (cytotoxicity, oral mucous irritation, sensitization, acute systemic toxicity). All results met preset criteria.
Technological Characteristics
Composition: dicalcium silicate, tricalcium silicate, tricalcium aluminate, zirconium oxide. Form: powder-to-putty mixture. Setting time: 2m 30s. Solubility: 1.4%. Radiopacity: >= 3mm aluminum. Standards: ISO 6876, ISO 10993-5, ISO 10993-10, ISO 10993-11.
Indications for Use
Indicated for patients requiring endodontic procedures including orthograde root canal filling, repair of root perforations (internal/external resorption), apical plugs for apexification, root end filling, and pulp capping.
Regulatory Classification
Identification
A root canal filling resin is a device composed of material, such as methylmethacrylate, intended for use during endodontic therapy to fill the root canal of a tooth.
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# 510(k) Summary (K132825)
This summary of 510(k) is being submitted in accordance with requirements of 21 CFR Part 807.92.
04/08/2014 Date: ________________________________________________________________________________________________________________________________________________________________________
#### 1. Submission Applicant / Submitter:
BioMTA 41, Techno 8-ro, Yuseong-gu, Daejeon, · Republic of Korea 305-500
Tel: +82-42-935-8926~9 . Fax: +82-42-936-8927
#### 2. Submission Correspondent:
Priscilla Chung LK Consulting Group USA, Inc. 2651 E Chapman Ave. Ste 110, Fullerton, CA 92831 Fax: 714-409-3357 Phone: 714-202-5789 Email: juhee.c@lkconsultinggroup.com ·
#### 3. Device:
| Proprietary Name: | RetroMTA-OrthoMTA II |
|------------------------------|---------------------------|
| Common Name: | Root Filling Material |
| Classification Name: | Root Canal Filling Resin |
| Classification: | Class II, 21 CFR 872.3820 |
| Classification Product Code: | KIF |
1
#### 4. Predicate Device:
OrthoMTA(K102575) by BioMTA
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#### 5. Device Description:
The major compositions of the RetroMTA-OrthoMTA II are dicalcium silicate, tricalcium silicate and tricalcium aluminate, and it has been showing good sealing ability and biocompatibility. It is prepared as a mixture of powder and is used in a putty form which gradually hardens in the oral environment. RetroMTA-OrthoMTA II is ideal for orthograde root canal filling. It is compositionally formulated to have the physical properties, setting requirements and characteristics necessary for a clinically effective root canal filling material.
#### 6. Intended Use:
The RetroMTA-OrthoMTA II is indicated for use as:
- Orthograde root canal filling material -
- -Repair of root perforations during root canal therapy(endodontic therapy), or as a consequence of internal and external resorption.
- -Repair of root canals as an apical plug during apexification
- Root end filling -
- Pulp capping -
#### 7. Performance Data(Non-Clinical):
The following properties were tested based on the referenced standards. All the test results met the preset test criteria.
- · ISO 6876 Setting time, Solubility and Radiopacity
- ISO 10993-5 Cytotoxicity
- ISO 10993-10 Oral Mucous Irritation & Sensitization
- · ISO 10993-11 Acute systemic toxicity
- · Other bench testing Appearance, weight, and package integrity
#### 8. Substantial Equivalence
The RetroMTA-OrthoMTA II is substantially equivalent to the OrthoMTA(Mineral Trioxide Aggregate) (K102575) manufactured by BioMTA. The difference between RetroMTA-OrthoMTA II and the predicate device is that the RetroMTA-OrthoMTA II uses zirconium oxide replacing bismuth oxide which was used in the predicate device. The use of zirconium oxide allows shorter setting time.
The bench and biocompatibility testing performed demonstrates that any differences in their technological characteristics do not raise any new questions as to safety and effectiveness. Therefore, it is concluded that RetroMTA-OrthoMTA II is safe, effective and substantially equivalent to the predicate device.
The table on the following page summarizes technological characteristics of the subject device as compared to the predicate.
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| Properties | Subject Device | Predicate Device |
|------------------------|----------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 510(k) Number | K132825 | K102575 |
| Device Name | RetroMTA-OrthoMTA II | OrthoMTA(Mineral Trioxide Aggregate) |
| Physical<br>Properties | -Setting time: 2m 30s<br>-Solubility: 1.4%<br>-Radiopacity: Not less than 3mm of<br>aluminum | - Setting time: 5h 30m<br>- Solubility: 3 %<br>- Radiopacity: Not less than 3mm of<br>aluminum<br>- Flow: Not less than 20 mm<br>- Working time: Less than 30min<br>- Film thickness: 27 um<br>- Dimensional change following<br>setting : 0.08% |
### . 9. Conclusion:
Based on the testing results, BioMTA concludes that the RetroMTA-OrthoMTA II is substantially equivalent to predicate device. (
.
:
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### DEPARTMENT OF HEALTH & HUMAN SERVICES
Public Health Service
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
### April 10, 2014
BioMTA C/O Ms. Priscilla Chung Regulatory Affairs Consultant LK Consulting Group USA, Inc. 2651 E Chapman Avenue, Suite 110 Fullerton, CA 92833
Re: K132825
Trade/Device Name: RetroMTA-OrthoMTA II Regulation Number: 21 CFR 872.3820 Regulation Name: Root Canal Filling Resin Regulatory Class: II Product Code: KIF Dated: February 25, 2014 Received: March 4, 2014
Dear Ms. Chung:
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.
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Page 2 - Ms. Chung
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 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 Small Manufacturers, International and Consumer Assistance at its tollfree number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/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 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/ResourcesforYou/Industry/default.htm.
Sincerely yours.
Mary-S. Runner -S
Erin I. Keith, M.S. Acting Director Division of Anesthesiology, General Hospital, Respiratory, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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## DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration
## Indications for Use
Form Approved: OMB No. 0910-0120 Expiration Date: December 31, 2013 See PRA Statement on last page.
510{k) Number (if known) K132825
Device Name RetroMTA-OrthoMTA II
Indications for Use (Describe)
The RetroMTA-OrthoMTA II is indicated for use as:
- Orthograde root canal filling material
- Repair of root perforations during root canal therapy(endodontic therapy), or as a consequence of internal resorption.
- Repair of root canals as an apical plug during apexification
- Root end filling
- Pulp capping
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.
A SERVED LA SHORT CALL CONFOR FOR FOR FOR FOR FOR FOR FOR THE OFFICE
Concurrence of Center for Devices and Radiological Health (CDRH) (Signature)
Image /page/5/Picture/18 description: The image shows the name "Sheena A. Green-S" in bold, black font at the top. Below the name is the date and time "2014.04.10 07:38:46 -04'00'" also in bold, black font. The text appears to be extracted from a document or a form, and the date and time might indicate when the document was created or modified.
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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.