Synthes chronOS is intended to fill, augment, or reconstruct periodontal or bony defects of the oral and maxillofacial region. Specifically, for the augmentation of deficient maxillary and mandibular alveolar ridges and the treatment of oral, maxillofacial and dental intraosseous defects including: ridge augmentation; sinus lifts; craniofacial augmentation; filling of defects of endodontic origin; filling of cystic defects; filling of extraction sites; filling of lesions of periodontal origin; repair of traumatic defects of the alveolar ridge; filling resection defects in bone tumors, cysts or other osseous defects; and substitute for autogenous or allogenic bone grafts. Synthes chronOS is intended to be gently packed or placed into the site and may be combined with autogenous blood, bone marrow or saline. chronOS resorbs and is replaced with bone during the healing process.
Device Story
Synthes chronOS is a porous, osteoconductive, resorbable bone grafting material composed of beta-tricalcium phosphate (β-TCP). Provided in sterile granules or preformed shapes (blocks, cylinders, wedges); used by clinicians in oral and maxillofacial surgery. Material is packed or placed into surgical sites; may be mixed with patient blood, bone marrow, or saline using an optional perfusion syringe. Device acts as a scaffold for bone growth; resorbs over time and is replaced by natural bone during healing. Benefits include providing a synthetic alternative to autogenous or allogenic bone grafts for defect repair.
Clinical Evidence
No clinical data provided; substantial equivalence based on bench testing and material characteristics.
Technological Characteristics
Material: β-Tricalcium Phosphate (β-TCP). Structure: Uniform 3D porous structure with pore diameters 100–500 µm. Form factor: Granules, blocks, cylinders, wedges. Sterilization: Sterile. Connectivity: None. Software: None.
Indications for Use
Indicated for patients requiring filling, augmentation, or reconstruction of periodontal or bony defects in the oral and maxillofacial region, including alveolar ridge augmentation, sinus lifts, and treatment of intraosseous defects.
Regulatory Classification
Identification
Bone grafting material is a material such as hydroxyapatite, tricalcium phosphate, polylactic and polyglycolic acids, or collagen, that is intended to fill, augment, or reconstruct periodontal or bony defects of the oral and maxillofacial region.
Special Controls
*Classification.* (1) Class II (special controls) for bone grafting materials that do not contain a drug that is a therapeutic biologic. The special control is FDA's “Class II Special Controls Guidance Document: Dental Bone Grafting Material Devices.” (See § 872.1(e) for the availability of this guidance document.)(2) Class III (premarket approval) for bone grafting materials that contain a drug that is a therapeutic biologic. Bone grafting materials that contain a drug that is a therapeutic biologic, such as biological response modifiers, require premarket approval.
(c)
*Date premarket approval application (PMA) or notice of product development protocol (PDP) is required.* Devices described in paragraph (b)(2) of this section shall have an approved PMA or a declared completed PDP in effect before being placed in commercial distribution.
Predicate Devices
Interpore IP 200 Coralline Hydroxyapatite Granules and Blocks
Submission Summary (Full Text)
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Image /page/0/Picture/0 description: The image shows the word "SYNTHES" in bold, black letters. To the left of the word is a logo that appears to be a circle with a design inside. To the right of the word is a small circle with an R inside, which is a registered trademark symbol. The word "SYNTHES" is likely the name of a company or product.
## JAN 2 3 2006
## 3.0 510(k) Summary
Page Page 1 of of 2
- Sponsor: Synthes (USA) 1302 Wrights Lane East West Chester, PA 19380 (610) 719-5000 Device Name: Synthes (USA) chronOS™ - B-TCP Classification: Class II, 21 CFR 8872.3930 Bone grafting material, synthetic Class II, 21 CFR §880.5600 Piston Syringe Predicate Device: Interpore IP 200 Coralline Hydroxyapatite Granules and Blocks chronOS, Craniofacial Applications, GXP Device Description: Synthes chronOS is a porous, osteoconductive, resorbable dental bone grafting material made from ß-Tricalcium Phosphate (TCP). chronOS features a uniform three dimensional pore structure. Pore diameters within the material range from 100 to 500 µm. chronOS is provided sterile in granules and preformed shapes (e.g. blocks, cylinders, wedges). chronOS may be packaged with a perfusion syringe that is used to mix the bone grafting material with the patient's blood, bone marrow or saline. Intended Use: Synthes chronOS is intended to fill, augment, or reconstruct periodontal or bony defects of the oral and maxillofacial region. Specifically, for the augmentation of deficient maxillary and mandibular alveolar ridges and the treatment of oral, maxillofacial and dental intraosscous defects including: ridge augmentation; sinus lifts; craniofacial augmentation; filling of defects of endodontic origin; filling of cystic defects; filling of extraction sites; filling of lesions of periodontal origin; repair of traumatic defects of the alveolar ridge; filling resection defects in bone tumors, cysts or other osseous defects; and substitute for autogenous or allogenic bone grafts. Synthes chronOS is intended to be gently packed or placed into the site and may be combined with autogenous blood, bone marrow or saline.
chronOS resorbs and is replaced with bone during the healing process.
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Image /page/1/Picture/0 description: The image shows the word "SYNTHES" in bold, black letters. To the left of the word is a logo that appears to be a stylized representation of a person. A small, circled "R" symbol is located to the right of the word, indicating that it is a registered trademark.
Page __________ of ___________________________________________________________________________________________________________________________________________________________
Substantial Documentation is provided which demonstrates that Synthes chronOS Equivalence: is substantially equivalent* to other legally marketed Synthes devices
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Image /page/2/Picture/1 description: The image shows the seal of the U.S. Department of Health and Human Services. The seal features a stylized eagle with its wings spread, symbolizing protection and service. Encircling the eagle is the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA", indicating the department's name and national affiliation. The seal is presented in black and white, giving it a formal and official appearance.
Public Health Service
SEP 1 3 2007
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Ms. Sheri L. Musgnung Senior Regulatory Affairs Specialist Synthes (USA) 1302 Wrights Lane East West Chester, Pennsylvania 19380
Re: K053022
Trade/Device Name: Synthes (USA) chronOS - B-TCP Regulation Number: 21 CFR 872.3930 Regulation Name: Bone Grafting Material Regulatory Class: II Product Code: LYC Dated: December 29, 2005 Received: January 3, 2006
Dear Ms. Musgnung:
This letter corrects our substantially equivalent letter of January 23, 2006.
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 (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.
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. Musgnung
Please be advised that FDA's issuance of a substantial equivalence determination does not Please be advised that I DA 3 issualled of a basetains.
mean that FDA has made a determination that your device complies with opension meall that PDA nas made a deceminations administered by other Federal agencies.
of the Act or any Federal statutes and regulations administered by other Federal agencies. of the Act of ally rederal statues and regurements, including, but not limited to: registration You must comply with an the Act 8 required (21 CFR Part 801); good manufacturing practices (200); and and listing (21 CFR Part 807), laceling (21 CFR Pat 820), and if 1 CFR Pat 820); and if requirents as set form in the quality by steams (2) steams (2) - ) - (2 of the Act);
applicable, the electronic product radiation control provisions (sections 531-542 of the 21 CFR 1000-1050.
This letter will allow you to continue marketing your device as described in your Section This letter will anow you to continue many of substantial equivalence of your device to 510(k) premarket nonfleated. In a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Office of Compliance at (240) 276-0115 (http://www.fda.gov/cdrh/organiz.html#0C for OC organization structure). Also, please (http://www.raa.gov.rounnels.gov.ding by reference to premarket notification" (21 CFR hout the regulation entitled, "There general information on your responsibilities under the r at 807.77). Tou may obtain only generers, International and Consumer Assistance at its Act from the DrAbient (800) 638-2041 or (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html
Sincerely yours,
Signature
Chiu Lin, Ph.D. Director Division of Anesthesiology, General Hospital, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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Image /page/4/Picture/0 description: The image shows the word "SYNTHES" in bold, black letters. To the left of the word is a circular logo with a stylized figure inside. A horizontal line runs beneath the word, and a small circle with a dot inside is located to the right of the letter "S".
## Indications for Use
| 510(k) Number (if known): | |
|---------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Device Name: | Synthes (USA) chronOST™ - β-TCP |
| Indications: | Synthes chronOS is intended to fill, augment, or reconstruct periodontal or bony defects of the oral and maxillofacial region. Specifically, for the augmentation of deficient maxillary and mandibular alveolar ridges and the treatment of oral, maxillofacial and dental intraosseous defects including: ridge augmentation; sinus lifts; craniofacial augmentation; filling of defects of endondontic origin; filling of cystic defects; filling of extraction sites; filling of lesions of periodontal origin; repair of traumatic defects of the alveolar ridge; filling resection defects in bone tumors, cysts or other osseous defects; and substitute for autogenous or allogenic bone grafts.<br>Synthes chronOS is intended to be gently packed or placed into the surgical site and may be combined with autogenous blood, bone marrow or saline. chronOS resorbs and is replaced with bone during the healing process. |
Prescription Use _____________________________________________________________________________________________________________________________________________________________ X ----(Per 21 CFR 801 Subpart D) AND/OR
Over-The-Counter Use_ (21 CFR 807 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODF)
ty, Ceneral Hospi
Coad, Demal Devices
K05302
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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.