The Rx90™ Low Profile Acetabular System is indicated for cemented or non-cemented use in cases of: 1) Non-Inflammatory degenerative joint disease including osteoarthritis and avascular necrosis. 2) Rheumatoid arthritis. 3) Correction of functional deformity. 4) Treatment of non-union, femoral neck fracture, and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques. 5) Revision of previously failed total joint replacement. Specific indications for compatible components that can be used with the above acetabular shells include: Salvage/Oncology Hip and Total Femur System (K002757, K021380, K033871) - 1. Painful and disabled joint resulting from avascular necrosis, osteoarthritis, rheumatoid arthritis, traumatic arthritis. 2. Correction of varus, valgus or post traumatic deformity. 3. Correction of revision of unsuccessful osteotomy, arthrodesis, or previous joint replacement. 4. Ligament deficiencies. 5. Tumor resections. 6. Treatment of non-unions, femoral neck and trochanteric fracture of the proximal femur with head involvement, unmanageable using other techniques. 7. Revision of previously failed total joint replacement. 8. Trauma. Interlocking hip stems are indicated for non-cemented application in cases of revision, trauma, fracture, oncology or other situations where severe proximal bone loss may compromise the fixation and stability of a standard type hip replacement prosthesis. (K990830, K042774). The Freedom™ Constrained Liners are intended for general use in skeletally mature individuals undergoing primary and/or secondary revision surgery at high risk of hip dislocation due to a history of prior dislocation, joint or bone loss, soft tissue laxity, neuromuscular disease, or intra-operative instability and for whom all other options to constrained acetabular components have been considered. (K030047)
Device Story
Rx90™ Low Profile Acetabular System is a metal-backed acetabular shell for total hip replacement; available in 40mm-70mm diameters with various hole configurations. Liners include Hi-Wall, 10 Degree, MROM, +5mm Hi-10 Degree, Flat Face, and Constrained styles; internal diameters 22mm-36mm. Used in orthopedic surgery; implanted by surgeons to replace the acetabular portion of the hip joint. Provides structural support and articulation surface for hip prosthesis. Benefits include restoration of joint function, pain relief, and stability in patients with severe joint disease or bone loss. System supports use with specific compatible components including Salvage/Oncology Hip systems, Interlocking hip stems, and Freedom™ Constrained Liners.
Clinical Evidence
No clinical data provided. Bench testing only.
Technological Characteristics
Metal-backed acetabular shell; available in diameters 40mm-70mm. Compatible with various liner styles (Hi-Wall, 10 Degree, MROM, +5mm Hi-10 Degree, Flat Face, Constrained). Materials and design are similar to predicate devices. No software or electronic components.
Indications for Use
Indicated for skeletally mature patients requiring primary or revision total hip arthroplasty due to degenerative joint disease (osteoarthritis, avascular necrosis), rheumatoid arthritis, functional deformity, non-union, femoral neck/trochanteric fractures, ligament deficiency, tumor resection, or failed prior joint replacement.
Regulatory Classification
Identification
A hip joint metal/polymer/metal semi-constrained porous-coated uncemented prosthesis is a device intended to be implanted to replace a hip joint. The device limits translation and rotation in one or more planes via the geometry of its articulating surfaces. It has no linkage across the joint. This generic type of device has a femoral component made of a cobalt-chromium-molybdenum (Co-Cr-Mo) alloy or a titanium-aluminum-vanadium (Ti-6Al-4V) alloy and an acetabular component composed of an ultra-high molecular weight polyethylene articulating bearing surface fixed in a metal shell made of Co-Cr-Mo or Ti-6Al-4V. The femoral stem and acetabular shell have a porous coating made of, in the case of Co-Cr-Mo substrates, beads of the same alloy, and in the case of Ti-6Al-4V substrates, fibers of commercially pure titanium or Ti-6Al-4V alloy. The porous coating has a volume porosity between 30 and 70 percent, an average pore size between 100 and 1,000 microns, interconnecting porosity, and a porous coating thickness between 500 and 1,500 microns. The generic type of device has a design to achieve biological fixation to bone without the use of bone cement.
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K042989
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BIOMET
APR 2 8 2005
#### 510(k) Summary
Applicant/Sponsor:Biomet Manufacturing Corp.
Patricia Sandborn Beres Contact Person: Senior Regulatory Specialist
Proprietary Name: Rx90™ Low Profile Acetabular System
Common Name: Acetabular component of a total hip replacement
### Classification Name(s):
- Classification Name(s):
1) Hip joint metal/polymer/metal semi-constrained porous-coated uncemented
1) Hip joint metal/polyment as as as a prosthesis (21 CFR 888.3358)
- 888.3350)
- 3) Hip joint metal/ceramic/polymer semi-constrained cemented or nonporous
3) Hip joint metal/ceramic/polymer semi-constract Hip Joint mosthesis (21 CFR 888.3353)
- CFR 888.3310)
Legally Marketed Devices To Which Substantial Equivalence Is Claimed. The Legally Marketed Devices 10 Winter System is substantialy equivalent to Biomet
Rx90™ Low Profile Acetabular System is substantialy equivalent to Biomet
Px90™ Low Profile Acet RX90 ™ Low Profile Acollowing 510(k) submissions:
| K920639 | Rx90™ Acetabular Component System |
|---------|-----------------------------------------------------------------------------|
| K926107 | ArCom® Acetabular Liners and Components |
| K030055 | Expanded indications for Non-Cemented Porous Coated Total<br>Hip Prostheses |
| K023357 | ArCom® Polyethylene Liners and Components (1050 Resin) |
Device Description: The Rx90™ Low Profile Acetabular System is a metal Device Description: The K20 " Lew intended for cemented or cementless backed shell with a poyeltryien internation of a total hip replacement. The metallic
replacement of the acetabular portion of a total hip replacement. The metallic replacement of the acetabular portion of a Tomm and two different hole
shell is available in diameters of 40mm to 70mm and two different hole shell is available in diameters of 40mm to 70mm diameters of 22mm, 28mm,
configurations. Liners are available with internal diameters of 22mm H configurations. Liners are available will interner of the more of the Mi32mm and 36mm. Liner styles include Hi-Wall, 10 Degree, MROM, +5mm Hi10 Degree, The T Szhin and Somm. Flat Face and Constrained.
> MAILING ADDRESS P.(). Box 587 Warsaw, IN 46581-0587
> > 트
SHIPPING ADDRESS 56 E. Bell Drive Warsaw, IN 46582
19
OFFICE 574.267.6639
I·AX 574.267.8137
E-MAIL biomet@blomet.com
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042989
p. 2/3
#### 510(k) Summary Rx90™ Low Profile Acetabular System Page 2
Intended Use: The Rx90™ Low Profile Acetabular System is indicated for cemented or non-cemented use in cases of:
- Cemented of Your Gementou assive joint disease including osteoarthritis and avascular necrosis
- 2) Rheumatoid arthritis
- 3) Correction of functional deformity
- 0) Oorlection of functional goromal neck fracture, and trochanteric fractures of the freatment of nort anion, renom to unmanageable by other techniques.
- 5) Revision of previously failed total joint replacement.
Specific indications for compatible components that can be used with the above acetabular shells include:
Salvage/Oncology Hip and Total Femur System (K002757, K021380, K033871)
- Oalvager Onoology Thip divint resulting from avascular necrosis, osteoarthritis, rheumatoid arthritis, traumatic arthritis
- 2. Correction of varus, valgus or post traumatic deformity
- 2. Gorrection of varies, valges of post frame of throdesis, or previous joint replacement
- 4. Ligament deficiencies
- 5. Tumor resections
- 5. Turnol Tesections femur with head involvement, unmanageable using other techniques
- 7. Revision of previously failed total joint replacement
- 8. Trauma
Interlocking hip stems are indicated for non-cemented application in cases of revision, trauma, fracture, oncology or other situations where severe proximal rovision, tradima, nuclement the fixation and stability of a standard type hip replacement prosthesis. (K990830, K042774)
The Freedom™ Constrained Liners are intended for general use in skeletally mature individuals undergoing primary and/or secondary revision surgery at high risk of hip dislocation due to a history of prior dislocation, joint or bone loss, soft Itsk of hip dislocation uto to a motory of proposative instability and for whom all other laxity, neuromusodial diodate, or intra operative into been considered. (K030047)
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042989
\$\rho^{3/3}\$
#### 510(k) Summary Rx90™ Low Profile Acetabular System Page 3
Summary of Technologies: The technological characteristics (materials, design, Summary of Treennologies: The Rx90™ Low Profile Acetabular System are similar to or identical to the predicate devices
Non-Clinical Testing: Mechanical testing has demonstrated the ability of the device to perform as expected.
Clinical Testing: None provided
All trademarks are property of Biomet, Inc.
{3}------------------------------------------------
DEPARTMENT OF HEALTH & HUMAN SERVICES
Image /page/3/Picture/13 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the words "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" arranged around the perimeter. Inside the circle is a stylized symbol that resembles an abstract human figure or a caduceus, with three wavy lines emanating from the head or top portion of the figure.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
## APR 2 8 2005
Ms. Patricia Sandborn Beres Senior Regulatory Specialist Biomet Manufacturing Corp. P.O. Box 587 Warsaw, Indiana 46581-0587
Re: K042989
R042987
Trade/Device Name: Rx90™ Low Profile Acetabular System Trade/Device Name: Tel. 76.70
Regulation Number: 21 CFR 888.3358, 888.3353, 888.3350, 888.3310 Regulation Number: 21 CFK 886.5536, 000.5993, 00015-004ted uncemented or Hip Joint inctal polymer semi-constrained smi-constrained cemented or prosulesis, THP Joint metal certains: [Hip joint metal/polymer semi-constrained non-porous uncemented prosit metal/polymer constrained cemented or uncemented prosthesis
Regulatory Class: II Regulations Code: LPH, LZO, JDI, KWZ, MEH Dated: January 26, 2005 Received: January 28, 2005
Dear Ms. Beres:
We have reviewed your Section 510(k) premarket notification of intent to market the indication We have reviewed your Section 310(x) prematics is substantially equivalent (for the indications
referenced above and have determined the device merketed in interstate referenced above and nave determined the devices marketed in interstate for use stated in the enclosure) to regally manced promotical Device Amendments, or to
commerce prior to May 28, 1976, the enactment date of the Federal Food. Drug commerce prior to May 28, 1970, the chartere with the provisions of the Federal Food, Drug, devices that have been recults approval of a proval et a provision (PMA).
and Cosmetic Act (Act) that do not require approval of a provisions of the Act . The and Cosmetic Act (Act) that do hot require approvate controls provisions of the Act. The You may, therefore, market the device, subject to use going misbranding and general controls provisions of the Fectinerals requires against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it If your device is classified (see above) mis existing major regulations affecting your device can
may be subject to such additional controls. Times 800 - 800 - 800 - 800 - 8 may be subject to such additional controlist Entrological of 898. In addition, FDA may
be found in the Code of Federal Regulations, Title 21, Parts 800 to Register be found in the Code of Pederal Regarning your device 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 issualice of a substance on the requirements of the Act
that FDA has made a determination that your device are and areasing. You must that FDA has made a delermination that your and regulation to registration and list or any Federal statures and regulations daministered by end to: registration and listing (21
{4}------------------------------------------------
CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set
s the electronic and started on GED Rate 820); and if applicable, the electronic CFR Part 807); labeling (21 CFR Patl of ); good manatoaning platfornicable, the electronic
forth in the quality systems (QS) regulation (21 CFR Pat 820); and if applicable, 1 forth in the quality systems (QS) regulation (2) -51 -542 of the Act); 21 CFR 1000-1050.
product radiation control provisions (Sections 531-542 of the Action 5 product radiation control provisions (Scellons 35 - 3 12 6 cccribed in your Section 510(k)
This letter will allow you to begin marketing your device to a legal This letter will allow you to begin marketing your actives of your device of your device to a legally
premarket notification. The FDA finding of substantial equivalence than premarket notification. The FDA inding of substantial equive 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
rs of the many of the many of an 076, 0100 - Alex mass note the regulation If you desire specific advice for your acvice on our acoming the regulation entitled, the regulation entitled, the regulation contact the Office of Complance at (240) 270 - 1707 Pat 807.97). You may obtain
"Misbranding by reference to premarket notification" (21CTR Pat 807.97). "Misbranding by reference to prematics notification" (1) & Act from the Division of Small other general information on your responsionities and its toll-free number (800) 638-2041 or Manufacturers, International and Consumer Assistanto a reservedraindustry/support/index.html.
(301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/industry/suppo
Sincerely yours,
Signature
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
{5}------------------------------------------------
# Indications for Use
510(k) Number (if known): K042989
Device Name: _Rx90™ Low Profile Acetabular System
#### Indications For Use:
Rx90™ Low Profile Acetabular Shells are intended for cemented or non-cemented total hip replacement in cases of
- 1. Non-Inflammatory degenerative joint disease including osteoarthritis and avascular necrosis.
- ર્ભ Rheumatoid arthritis
- 3. Correction of functional deformity
- 4. Treatment of non-union, femoral neck fracture, and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques.
- ഗ് Revision of previously falled total hip arthroplasty.
Specific indications for compatible components that can be used with the above acetabular shells include:
Salvage/Oncology Hip and Total Femur System (K002757, K021380, K033871)
- 9. Palnful and disabled joint resulting from avescular necrosis, osteoarthritis, traumatoid arthrills, traumatic arthrills, traumatic arthritis
- 10. Correction of varus, valgus or post traumatic deformity
- 11. Correction of revision of unsuccessful osteotomy, arthrodesis, or previous joint replacement
- 12. Ligament deficiencies
- 13. Tumor resections
- 14. Treatment of non-unions, femoral neck and trochanteric fracture of the proximal femur with head involvement, unmanageable using other techniques
- 15. Revision of previously failed total joint replacement
- 16. Trauma
Interiocking hip stems are Indicated for non-comented application in cases of revision, trauma, fracture, oncology or other situations where severe proximal bace loss may compromise the fixation and stability of a standard type hip replacement prosthesis. (K990830, K042774)
The Freedom™ Constrained Liners are intended for general use in skeletally mature individuals undergoing primary and/or secondary revision surgery at high dislocation due to a history of prior dislocation, joint or bone loss, soft laxlty, neuromuscular disease, or intra-operative instability and for whom all other options to constrained acetabular components have been considered. (030047)
Prescription Use X (Part 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 (ODE)
Restorative
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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.