ReFIX Biodegradable Pins are intended for use in the fixation and/or alignment of osteotomies and arthrodeses; and fixation and/or alignment of fragments of fractured non-load bearing bones, osteochondral fragments and cancellous/non-load bearing fragments. For example, ReFIX pins are intended for use in the following procedures: - fixation of phalangeal fusion and fracture . - repair of metacarpal fusion and fracture . - fixation of hand and wrist fractures . - fixation of metatarsal osteotomies . - correction of hallux valgus .
Device Story
ReFIX Internal Fixation Pins are biodegradable orthopedic implants; manufactured from PLLA and PLGA polymers. Pins are available in diameters of 2.0mm, 2.7mm, 3.5mm, and 4.5mm with a length of 70mm. Used by orthopedic surgeons for internal fixation of non-load bearing bone fractures, osteotomies, and arthrodeses. Pins provide mechanical stabilization of bone fragments during healing; material degrades over time, eliminating need for secondary removal surgery. Device is intended for prescription use only.
Indicated for fixation/alignment of osteotomies, arthrodeses, and fragments of fractured non-load bearing bones, osteochondral fragments, and cancellous/non-load bearing fragments in hand, wrist, and foot procedures (e.g., phalangeal/metacarpal fusion/fracture, metatarsal osteotomies, hallux valgus correction).
Regulatory Classification
Identification
A smooth or threaded metallic bone fixation fastener is a device intended to be implanted that consists of a stiff wire segment or rod made of alloys, such as cobalt-chromium-molybdenum and stainless steel, and that may be smooth on the outside, fully or partially threaded, straight or U-shaped; and may be either blunt pointed, sharp pointed, or have a formed, slotted head on the end. It may be used for fixation of bone fractures, for bone reconstructions, as a guide pin for insertion of other implants, or it may be implanted through the skin so that a pulling force (traction) may be applied to the skeletal system.
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APR 1 8 2005
### 510(K) SUMMARY
page 1 of 2
Subject 510(k) Number - K0433339
Sponsor
## Xtremi-T, LLC
3131 Princeton Pike Bldg 5, Suite 200 Lawrenceville, New Jersey 08648
### FDA Establishment Registration Number
3004613836
#### Official Contact
Shawn T. Huxel, President Xtremi-T, LLC 3131 Princeton Pike; Bldg 5, Suite 200 Lawrenceville, New Jersey 08648 Phone - (609) 896-0008 Fax - (908) 842-0310 Mobile - (908) 896-5893
#### Proprietary Name
ReFIX™ Internal Fixation Pins
#### Common Name
Biodegradable Internal Fixation Device
### Classification Name and Reference
888.3040 -- Smooth or Threaded Bone Fixation Fastener
Regulatory Class Class II
Device Product Code (Panel 87) HTY
Date Prepared 14 March, 2005
Xtremi-T, LLC
Confidential
Pg 14 of 112
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K043339
Page 2 of 2
### Brief Description of Device
Brief Desoription of Internal Fracture Fixation Devices based upon ReFIX":" Pins are comprised of themal Package Pakken Divers are widely used in the orthopaedic specialty. The ReFTX Pins are manufactured from PLLA and PLGA. The
orthopaedic specialty. The ReFTX Pins are manufactured from exch supplied i orthopaedic specialty. The ReFTX Phis are niamatacanon and 4.5mm, each supplied in a
pins are available in diameters of 2.0mm, 2.7mm, 3.5mm, and 4.5mm, the ReFIX pins are available in diameters of 2.0mm, 2.7mm, Stance, atively using the ReFIX
length of 70mm. The pins are sized and trimmed intraction and materials are de length of 70mm. The pins are sized and unimited misues and materials are designed to address the indications cited.
#### Indications for Use
midications for USC ReFIX Biodegradable Pins are intended to use in and arthrodeses; and fixation
fragments of fractured non-load bearing bones, osted broads and fixation fragments of fractured non-load ocaring bones, osteochondral fragments and cancellous/non-load bearing fragments.
For example, ReFIX pins are intended for use in the following procedures:
- fixation of phalangeal fusion and fracture .
- repair of metacarpal fusion and fracture t
- fixation of hand and wrist fractures .
- fixation of metatarsal osteotomies .
- correction of hallux valgus ●
#### Basis for Substantial Equivalence
Dasis for Oubstantial equivalence of the ReFIX Pins is based on the equivalence in intended I no substantial verational principals, and indications to:
| DEVICE | Manufacturer | Trade Name |
|---------|--------------|----------------------|
| K010983 | Bionx | PLLA Pin |
| K003659 | Bionx | PLGA Pin |
| K925098 | Bionx | Biofix Pin |
| K031712 | Inion | OTPS Pin |
| K040500 | Biomet | Lactonail |
| K011522 | Biomet | Resorbable Bone Pins |
| K990291 | Biomet | Lactosorb Bone Pin |
| K953194 | Biomet | Lactosorb Bone Pin |
| K890902 | D&G | Biofix Pin |
| K901456 | J&J | Orthosorb |
| K864912 | J&J | PDS Pin |
#### END OF 510(K) SUMMARY
Xtremi-T, LLC
Pg 15 of 112
Confidential
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Image /page/2/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo is circular, with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the perimeter of the circle. Inside the circle is a stylized image of an eagle.
APR 1 8 2005
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
Mr. Shawn T. Huxel President, GM Xtremi-T, LLC 3131 Princeton Pike Building 5, Suite 200 Lawrenceville, New Jersey 08648
Re: K043339
K043339
Trade/Device Name: ReFix Internal Fracture Fixation Pins Regulation Number: 21 CFR 888.3040 Regulation Name: Smooth or threaded metallic bone fixation fastener Regulatory Class: II Product Code: HTY Dated: March 14, 2005 Received: March 15, 2005
Dear Mr. Huxel:
We have reviewed your Section 510(k) premarket notification of intent to market the indication We have reviewed your Section 910(t) premainted instally equivalent (for the indications
referenced above and have determined the device is substantial in interests a for use stated in the enclosure) the art acted predicate devices marketed in interstate for use stated in the enclosure) to regally mancetod proce Amendments, or to commerce prior to May 28, 1970, the chacanene with the provisions of the Federal Food, Drug, devices that have been reciassified in accordance what approval application (PMA).
and Cosmetic Act (Act) that do not require approval of a provisions of the Act . The and Cosment Act (Act) that do not require to the general controls provisions of the Act. The Act. The Act. The You may, merelote, market the device, saloject or use ments for annual registration, listing of
general controls provisions of the Act include requirements michaeading and general controls provisions of the received required in the bronibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), If your device is classified (SCC above) into or regulations affecting your device
it may be subject to such additional controls. Existing major regulation FDA it may be subject to such additional controls: "Intering and to 898. In addition, FDA
can be found in the Code of Federal Regulations, Title 21, Parts 800 to Analysis can be lound in the Code of I edela. Regulation in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean Please be advised that FDA s issualled of a subscribed with other requirements of the Act
that FDA has made a determination that your device complies with other requirements that FDA has made a decemmanon that your acered by other Federal agencies. You must or any Federal statules and regulations administered of the registration and listing (21).
comply with all the Act's requirements, including, but not limited to set comply with all the Act S requirements, mendants, wartice requirements as set
CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice the electronic CFR Part 807); labeling (21 CFR Fart on ); good manafanting production in electronic
forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the el forth in the quality systems (QB) regulation (Sections 531-542 of the Act); 21 CFR 1000-1050.
product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000
{3}------------------------------------------------
Page 2- Mr. Shawn T. Huxel
This letter will allow you to begin marketing your device as described in your Section 510(k) This letter will allow you to begin makemig your article walness of your device to a legally
premarket notification. The FDA finding of substantial end the permits vour premarket notification. The I DA Inding of oublication 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
s and the may of the may on 1100 m Marceless and the regulation entitled If you desire specific advice for your de vice on our ac access note the regulation entitled,
contact the Office of Compliance at (240) 276-0120 . Also, please note the now o contact the Office of Comphalled at (240) 276 - 8 - 4 - 4 - 7 Part 807.97). You may obtain
"Misbranding by reference to premarket notification" (21 - 1 - 4 first from the Di "Misbranding by reference to premarket nonlication (1) of Act from the Division of Small .
other general information on your responsibilities under (800) 638-204) other general information on your responsion.comer Assistance at its toll-fire number (800) 638-2041 or Manufacturers, International and Consumer Assistantes artis courted to the result of the support/index.html.
Sincerely yours,
Stupt durelu
4 Miriam C. Provost, Ph.D. Acting Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{4}------------------------------------------------
# Statement of Indications for Use
510 (K) NUMBER IF KNOWN: K043339
MANUFACTURER: Xtremi-T, LLC
DEVICE NAME: ReFIX Internal Fracture Fixation Pins
Indications:
ReFIX Biodegradable Pins are intended for use in the fixation and/or alignment of
ten the first and the collection beauts and arthrodeses; and ReFTX Biodegradable Plils are intention for assestomies and arthrodoses; and fragments of fractured mou-foad ocuring ochos, est. Secochondral fragments and
fixation and/or alignment of apical fragments, osteochondral fragments and
fixation and/or alig cancellous/non-load bearing fragments.
earses and
- fixation of phalangeal fusion and fracture .
- repair of metacarpal fusion and fracture �
- fixation of hand and wrist fractures .
- fixation of metatarsal osteotomies .
- correction of hallux valgus .
### (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE, IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use *yes* or Over-the-Counter Use *No*
(Per 21 CFR 801.109) (Optional Format 1-2-1996)
(Division Sign-Off)
Division of General, Restorative,
and Neurological Devices
**510(k) Number** K043339
Xtremi-T, LLC
Page 13 of 112
Confidential
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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.