The Stryker CMF MEDPOR Customized Implant is indicated for the augmentation and/or restoration of bony and/or soft tissue deformities in post-traumatic, post-surgical, or congenital craniofacial defects, including, but not limited to, the correction and prevention of persistent temporal hollowing (PTH).
Device Story
Device consists of customized craniofacial implants molded from high-density polyethylene (HDPE) based on patient CT data and surgeon specifications. Implants fill bony voids, defects, and contour irregularities in non-load bearing craniofacial regions. Used in clinical settings by surgeons; fixated to native bone using self-drilling screws. This kit modification offers the implant without a previously included Host Bone Model (HBM) subcomponent. Device provides structural augmentation to restore anatomy; benefits patients by correcting craniofacial deformities.
Clinical Evidence
No clinical data required. Substantial equivalence supported by sterilization and biocompatibility bench testing (EO residual analysis and sterilization cycle adoption).
Indicated for patients requiring augmentation or restoration of bony/soft tissue deformities resulting from post-traumatic, post-surgical, or congenital craniofacial defects, including correction and prevention of persistent temporal hollowing (PTH).
Regulatory Classification
Identification
A chin prosthesis is a silicone rubber solid device intended to be implanted to augment or reconstruct the chin.
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August 15, 2019
Stryker Leibinger GmbH & Co. KG Gregory Gohl Sr. Regulatory Affairs Specialist Boetzinger Strasse 41 Freiburg, D-79111 De
Re: K191916
Trade/Device Name: Stryker CMF MEDPOR Priority Customized Implant Kit Regulation Number: 21 CFR 878.3550 Regulation Name: Chin Prosthesis Regulatory Class: Class II Product Code: FWP Dated: July 16, 2019 Received: July 17, 2019
# Dear Gregory Gohl:
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. 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 located 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.
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
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801); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 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-device-safety/medical-device-reportingmdr-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/medicaldevices/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-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
For Nina Mezu-Nwaba. PharmD.. MPH.. MSc. CAPT., United States Public Health Service Assistant Director (Acting), Plastic Surgery Implant Devices Team Division of Infection Control and Plastic Surgery Devices Office of Surgical and Infection Control Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K191916
Device Name
Stryker CMF MEDPOR Priority Customized Implant Kit
Indications for Use (Describe)
The Stryker CMF MEDPOR Customized Implant is indicated for the augmentation of bony and/or soft tissue deformities in post-traumatic, post-surgical, or congenital craniofacial defects, including, but not limited to, the correction and prevention of persistent temporal hollowing (PTH).
Type of Use (Select one or both, as applicable)
| <span style="font-size: 12px;">☑</span> Prescription Use (Part 21 CFR 801 Subpart D) | <span style="font-size: 12px;">☐</span> Over-The-Counter Use (21 CFR 801 Subpart C) |
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# 510(k) Summary
This section provides a summary of 510(k) information in accordance with the requirements of 21 CFR 807.92.
#### I. SUBMITTER [§807.92(a)(1)]
| 510(k) Owner: | Stryker Leibinger GmbH& Co. KG<br>Boetzinger Strasse 41<br>D-79111 Freiburg, Germany |
|-------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Submitter/ Contact<br>Person: | Gregory Gohl<br>Sr. Regulatory Affairs Specialist<br>Stryker Craniomaxillofacial (CMF)<br>750 Trade Centre Way<br>Portage, MI 49002<br>Phone: 269-389-4319 |
Fax: 877-648-7114
Date prepared: July 16, 2019
#### DEVICE [§807.92(a)(2)] II.
| Trade Name: | Stryker CMF MEDPOR Priority Customized Implant Kit |
|-------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------|
| Abbreviated Name: | MEDPOR Priority CI Kit |
| Common or Usual Name: | Customized Implant |
| Device: | Prosthesis, Chin, Internal; per 21 CFR §878.3550 |
| Classification Name &<br>Regulation Description: | Chin prosthesis; per 21 CFR §878.3550 |
| Regulation Medical<br>Specialty & Review Panel: | General & Plastic Surgery |
| Product Code: | FWP |
| Regulatory Device Class: | Class II |
| *Note the company Stryker or legacy name Stryker Leibinger precedes the<br>product/trade name and predicate device in some documentation. | |
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#### PREDICATE DEVICE [§807.92(a)(3)] III.
## 510(k) Number: K191916
Predicate Device: Stryker CMF MEDPOR Customized Implant (also referred to as MEDPOR CIs or MEDPOR CI Kits) - K153508
Reference Device: PEEK Customized Cranial Implant (CCI) Priority - K152076
#### DEVICE DESCRIPTION [§807.92(a)(4)] IV.
The Stryker CMF MEDPOR Customized Implant, also referred to as MEDPOR CIs, product offerings provide customized cranial or craniofacial patient specific implants based on CT data and surgeon input. These MEDPOR CIs are currently packaged into MEDPOR CI Kits witha patient-specific Host Bone Model (HBM) that represents the 3D patient's anatomy surrounding the defect location. This Special 510(k) is submitted specifically to include the customer option to sell new Stryker CMF MEDPOR Priority Customized Implant Kits without the Host Bone Model subcomponent.
#### V. INDICATIONS FOR USE [§807.92(a)(5)]
| | Subject Device | Predicate Device – K153508 |
|------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Indications for<br>Use | The Stryker CMF MEDPOR<br>Customized Implant is indicated for<br>the augmentation and/or restoration<br>of bony and/or soft tissue deformities<br>in post-traumatic, post-surgical, or<br>congenital craniofacial defects,<br>including, but not limited to, the<br>correction and prevention of<br>persistent temporal hollowing<br>(PTH). | The Stryker CMF MEDPOR<br>Customized Implant is indicated for<br>the augmentation and/or restoration of<br>bony and/or soft tissue deformities in<br>post-traumatic, post-surgical, or<br>congenital craniofacial defects,<br>including, but not limited to, the<br>correction and prevention of persistent<br>temporal hollowing (PTH). |
### TABLE 5-1: COMPARISON OF INDICATIONS FOR USE
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### VI. COMPARISON OF TECHNOLOGICAL CHARACTERISTICS WITH THE PREDICATE DEVICE [§807.92(a)(6)]
The subject device is compared to its predicate device for substantial equivalence of technological characteristics based on the following criteria:
- A. Principles of Operation
- B. Technological Characteristics
# A. Principles of Operation / Operating Principle
The basic operational principle of the Stryker CMF MEDPOR Customized Implant remains the same as the predicate: The MEDPOR CIs are intended to be used to fill bony voids, defects, and contour irregularities in non-load bearing regions of the craniofacial skeleton.
# B. Technological Characteristics
The technological characteristics remain the same as the predicate:
- Same Intended Use: The Stryker CMF MEDPOR Customized Implant is indicated for the augmentation and/or restoration of bony and/or soft tissue deformities in posttraumatic, post-surgical, or congenital craniofacial defects, including, but not limited to, the correction and prevention of persistent temporal hollowing (PTH).
- -Same Operating Principle: to fill bony voids, defects, and contour irregularities in nonload bearing regions of the cranial skeleton.
- Same Mode of Fixation: fixated to the native bone with Stryker Neuro. Midface, and/or -Upperface self-drilling screws.
- Same Materials of Construction: Implants are made from high density polyethylene -(HDPE).
- Same Design: the customized craniofacial implants are molded from HDPE to the specific reconstruction boundaries indicated by the surgeon via submission of CT scans and a customized implant request.
# VII. PERFORMANCE DATA [§807.92(b)(7)]
The modifications described in this submission is the optional removal of the Host Bone Model subcomponent from the Stryker CMF MEDPOR Customized Implant Kit. This introduces a new product offering called the Stryker CMF MEDPOR Priority Customized Implant Kit, also referred to as the MEDPOR Priority CI Kit. There are no changes to the MEDPOR CI device itself.
Without the Host Bone Model in the MEDPOR Priority CI Kit, the necessity to gamma sterilize a subcomponent no longer exists. Therefore, Stryker Sustainability Solutions (SSS)
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Incorporated was identified and evaluated as an additional Ethylene Oxide (EO) sterilization location for MEDPOR CIs due to the location's ability to achieve a quicker turnaround time to the end-user. SSS was proven to be as safe and effective for sterilization as the predicate location (see Section 14 for sterilization evaluation and adoption).
A risk analysis was performed, and sterilization testing was performed in support of the substantial equivalence determination.
There is no change in the design, material, manufacturing process, or duration/location of contact. The only change necessary to evaluate by testing is the additional sterilization location for MEDPOR Cls. The tests were performed to adopt the MEDPOR Priority CI Kit into existing Cycle 51 at Stryker Sustainability Solutions.
# Sterilization and Biocompatibility Testing
| Characteristic | Test | Result |
|-------------------------------------|------------------|--------|
| Sterilization | Product Adoption | Passed |
| Sterilization /<br>Biocompatibility | EO Residual | Passed |
# Performance Bench Testing
Performance bench testing was not required as a basis for substantial equivalence.
# Animal Testing
Animal testing was not required as a basis for substantial equivalence.
# Clinical Testing [§807.92(b)(2)]
Clinical testing was not required as a basis for substantial equivalence.
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### VIII. CONCLUSIONS [§807.92(b)(3)]
In summary, the Stryker CMF MEDPOR Priority Customized Implant Kit is substantially equivalent to its predicate device. The fundamental scientific technology has not changed from the predicate device since the design of the Stryker CMF Customized Implant subcomponent has not changed. The only addition is to provide a MEDPOR Priority CI Kit with two identical sterile implants and no Host Bone Model in a suitable packaging system. The intended use, technological characteristics, and materials of construction have not changed as discussed in detail above and other sections of the submission. The modifications do not raise new questions of safety or effectiveness. According to the comparison based on the requirements of 21 CFR 807.87 and the information provided herein, it is concluded that the information included in this submission supports substantial equivalence.
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.