AOS SOLID LOCKING LAG SCREW, AOS TELESCOPING LAG SCREW
K120148 · Advanced Orthopaedic Solutions, Inc. · HSB · Oct 2, 2012 · Orthopedic
Device Facts
Record ID
K120148
Device Name
AOS SOLID LOCKING LAG SCREW, AOS TELESCOPING LAG SCREW
Applicant
Advanced Orthopaedic Solutions, Inc.
Product Code
HSB · Orthopedic
Decision Date
Oct 2, 2012
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 888.3020
Device Class
Class 2
Attributes
Therapeutic
Indications for Use
The AOS Trochanteric Nail is intended to treat stable and unstable proximal fractures of the femur including pertrochanteric, intertrochanteric and high subtrochanteric fractures and combinations of these fractures. The long trochanteric nail is additionally indicated for subtrochanteric fractures, pertrochanteric fractures associated with shaft fractures, pathologic fractures (including prophylactic use) in osteoporotic bone of the trochanteric and diaphyseal areas, long subtrochanteric fracture, ipsilateral femoral fractures, proximal and distal non-unions and malunions and revisions procedures.
Device Story
AOS Trochanteric Nail System components (Solid Locking and Telescoping Lag Screws) used for internal fixation of femoral fractures. Screws lock to intramedullary nail; telescoping design allows thread collapse within barrel. Used in clinical/surgical settings by orthopedic surgeons. Provides mechanical stabilization of bone fractures to facilitate healing. Benefits include fracture reduction and stabilization in osteoporotic or complex fracture scenarios.
Clinical Evidence
Bench testing only. Static and fatigue testing performed per ASTM F384. Torque testing performed per ASTM F543.
Technological Characteristics
Metallic orthopedic fracture fixation screws. Materials and design consistent with predicate systems. Testing conducted per ASTM F384 (static/fatigue) and ASTM F543 (torque).
Indications for Use
Indicated for patients with stable/unstable proximal femoral fractures, including pertrochanteric, intertrochanteric, high subtrochanteric, and combinations thereof. Long nail indicated for subtrochanteric fractures, pertrochanteric fractures with shaft fractures, pathologic fractures (including prophylactic use) in osteoporotic bone, long subtrochanteric fractures, ipsilateral femoral fractures, proximal/distal non-unions, malunions, and revision procedures.
Regulatory Classification
Identification
An intramedullary fixation rod is a device intended to be implanted that consists of a rod made of alloys such as cobalt-chromium-molybdenum and stainless steel. It is inserted into the medullary (bone marrow) canal of long bones for the fixation of fractures.
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AOS
ADVANCED ORTHOPAEDIC SOLUTIONS
K120148
PAGE 1 OF 2
## 5. TRADITIONAL 510(K) SUMMARY OCT 2 2012 DATE PREPARED: October 1, 2012 Advanced Orthopaedic Solutions, Inc. SUBMITTED BY: 386 Beech Avenue, Unit B6 Torrance, CA 90501 Phone: (310) 533-9966 CONTACT PERSON: Julie Glendrange Advanced Orthopaedic Solutions, Inc. 386 Beech Avenue, Unit B6 Torrance, CA 90501 Phone: (310) 533-9966 DEVICE NAME: AOS Trochanteric Nail System, Telescoping (TC") Lag Screw and Solid Locking Lag Screw COMMON NAME: Internal Fixation CLASSIFICATION: Class II, 21 CFR 888.3020 Rod, Fixation, Intramedullary and Accessories DEVICE CODE: HSB SUBSTANTIALLY EQUIVALENT DEVICE: AOS Trochanteric Nail System (510(k): K021008, Cleared June 20, 2002 and K103533, Cleared Jan. 19, 2011); and EBI® Trochanteric Nail System (510(k): K050118, Cleared Feb. 16, 2005) DEVICE DESCRIPTION: The AOS Solid Locking and Telescoping Lag Screws are used in the AOS Trochanteric Nail System, in conjunction with the AOS Trochanteric Nail. Both AOS screws can be locked to the nail. The Telescoping Lag Screw allows the threads to collapse within the barrel. INDICATIONS FOR USE: The AOS Trochanteric Nail is intended to treat stable and unstable proximal fractures of the femur including pertrochanteric, intertrochanteric and high subtrochanteric fractures and combinations of these fractures. The long trochanteric nail is additionally indicated for subtrochanteric fractures, pertrochanteric fractures associated with shaft fractures, pathologic fractures (including prophylactic
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use) in osteoporotic bone of the trochanteric and diaphyseal areas, long subtrochanteric fracture, ipsilateral femoral fractures, proximal and distal nonunions and malunions and revisions procedures.
1129 148
#### SUBSTANTIAL EQUIVALENCE: Information presented supports substantial equivalence of the AOS Solid Locking and Telescoping Lag Screws to the predicate devices. The proposed systems have the same indications for use, are similar in shape and design, have the same fundamental technology and are made of the same material.
PRECLINICAL TESTING: The AOS Solid Locking and Telescoping Lag Screws were each subjected to static and fatigue testing in accordance with ASTM F384, Standard Specifications and Test Methods for Metallic Angled Orthopedic Fracture Fixation Devices. The results demonstrate that the Solid Locking and Telescoping Lag Screws are substantially equivalent to the predicate devices. Additionally, the Telescoping Lag Screw was subjected to torque testing in accordance with ASTM F543, Standard Specifications and Test Methods for Metallic Medical Bone Screws.
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Image /page/2/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services. The logo features a stylized eagle with three bars representing health, services, and human needs. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" is arranged in a circular fashion around the eagle.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room -W066-G609 Silver Spring, MD 20993-0002
OCT 2 2012
Advanced Orthopaedic Solutions, Inc. % Ms. Julie Glendrange 386 Beech Avenue, Unit B6 Torrance, CA 90501
#### Re: K120148
Trade/Device Name: Solid Locking Lag Screw and TCII - Telescoping Lag Screw Regulation Number: 21 CFR 888.3020 Regulation Name: Intramedullary fixation rod Regulatory Class: II Product Code: HSB Dated: September 14, 2012 Received: September 17, 2012
#### Dear Ms. Glendrange:
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 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). You may, therefore, market the device, subject to the general controls provisions of the Act. However, you are responsible to determine that the medical devices you use as components in the [kit/tray] have either been determined as substantially equivalent under the premarket notification process (Section 510(k) of the act), or were legally on the market prior to May 28, 1976, the enactment date of the Medical Device Amendments. Please note: If you purchase your device components in bulk (i.e., unfinished) and further process (e.g., sterilize) you must submit a new 510(k) before including these components in your kit/tray. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, and 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.
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
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Page 2 – Ms. Julie Glendrange
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 go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. 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,
Erin S. Keith
Mark N. Melkerson Director Division of Surgical. Orthopedic and Restorative Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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### VANCED ORTHOPAEDIC SOLUTIONS
# 4. INDICATIONS FOR USE STATEMENT
Traditional 510(k) Premarket Notification Indications for Use Statement AOS Trochanteric Nail System
510(k) Number (if known): K120148
Device Name: AOS Trochanteric Nail System
Indications for Use:
The AOS Trochanteric Nail is intended to treat stable and unstable proximal fractures of the femur including pertrochanteric, intertrochanteric and high subtrochanteric fractures and combinations of these fractures. The long trochanteric nail is additionally indicated for subtrochanteric fractures, pertrochanteric fractures associated with shaft fractures, pathologic fractures (including prophylactic use) in osteoporotic bone of the trochanteric and diaphyseal areas, long subtrochanteric fracture, ipsilateral femoral fractures, proximal and distal non-unions and malunions and revisions procedures.
Prescription Use: X AND/OR (Part 21 CFR 801 Subpart D)
Over-The-Counter Use: (Part 21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NECESSARY)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Ashif
(Division Sign-Oft) Division of Surgical, Orthopedic, and Restorative Devices
K120148 510(k) Number .
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.