K122778 · Wrightmedicaltechnologyinc · KWA · Oct 11, 2012 · Orthopedic
Device Facts
Record ID
K122778
Device Name
PROFEMUR Z REVISION HIP STEM
Applicant
Wrightmedicaltechnologyinc
Product Code
KWA · Orthopedic
Decision Date
Oct 11, 2012
Decision
SESE
Submission Type
Special
Regulation
21 CFR 888.3330
Device Class
Class 3
Attributes
Therapeutic
Indications for Use
Wright Medical total hip systems are indicated for use in total hip arthroplasty for reduction or relief of pain and/or improved hip function in skeletally mature patients. non-inflammatory degenerative joint disease such as osteoarthritis, avascular necrosis, 1. ankylosis, protrusio acetabuli, and painful hip dysplasia; inflammatory degenerative joint disease such as rheumatoid arthritis; 2. correction of functional deformity; and, 3. revision procedures where other treatments or devices have failed ধ: Rough grit blast surfaces are intended for uncemented arthroplasty. The PROFEMUR® Z Revision Hip Stem is intended for cementless hip arthroplasty.
Device Story
PROFEMUR® Z Revision Hip Stem is a modular, cementless hip prosthesis used in total hip arthroplasty. Device consists of titanium alloy stems with heavy grit-blasted surfaces, available in 9 sizes. Intended for surgical implantation by orthopedic surgeons in clinical settings to replace diseased or damaged hip joints. Device functions as a structural implant to restore hip function and reduce pain. Design features include proximal geometries consistent with predicate devices and extended distal stem lengths. Safety and effectiveness established through mechanical fatigue testing per ISO 7206-4, -6, and -8 standards. No clinical data provided.
Clinical Evidence
No clinical data provided. Safety and effectiveness supported by bench testing (distal and proximal fatigue evaluation per ISO 7206-4, -6, and -8).
Technological Characteristics
Cementless modular hip stem; titanium alloy construction; heavy grit-blasted surface finish; 9 available sizes (3-11); distal and proximal fatigue testing per ISO 7206-4, -6, and -8.
Indications for Use
Indicated for skeletally mature patients requiring total hip arthroplasty for non-inflammatory degenerative joint disease (osteoarthritis, avascular necrosis, ankylosis, protrusio acetabuli, painful hip dysplasia), inflammatory degenerative joint disease (rheumatoid arthritis), functional deformity correction, or revision procedures following failed prior treatments.
Regulatory Classification
Identification
A hip joint metal/metal semi-constrained, with an uncemented acetabular component, prosthesis is a two-part 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 includes prostheses that consist of a femoral and an acetabular component, both made of alloys, such as cobalt-chromium-molybdenum. The femoral component is intended to be fixed with bone cement. The acetabular component is intended for use without bone cement (§ 888.3027).
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K122778 (pg. 1 of 2)
OCT 11 2012
# 510(K) Summary of Safety and Effectiveness
In accordance with the Food and Drug Administration Rule to implement provisions of the Safe Medical Devices Act of 1990 and in conformance with 21 CFR 807, this information serves as a Summary of Safety and Effectiveness for the use of the PROFEMUR® Z Revision Hip Stem .
Submitted By:
Date:
Contact Person:
Proprietary Name:
Common Name:
Classification Name and Reference:
Wright Medical Technology, Inc. 5677 Airline Rd, Arlington TN, 38002 (800) 238-7188
August 27, 2012
Dean Nachtrab Regulatory Affairs Specialist
PROFEMUR® Z Revision Hip Stem
Hip Stem
888.3330 KWA Hip joint metal/metal semiconstrained, with an uncemented acetabular component prosthesis Class III
888.3320 JDL Hip joint metal/metal semiconstrained, with a cemented acetabular component, prosthesis Class III
Subject Product Code and Panel Code:
Predicate Devices:
Orthopedics/87/ KWA, JDL
STEM Hip Replacement System 510(k)s: K021346
PRESERVE HIP STEM 510(K): K112080
PROFEMUR Z Revision Hip Stem 510(K): K121221
#### DEVICE INFORMATION
#### A. Intended Use
Wright Medical total hip systems are indicated for use in total hip arthroplasty for reduction or relief of pain and/or improved hip function in skeletally mature patients.
Indications for Use
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K12 2778 (pg. 2 of 2)
- non-inflammatory degenerative joint disease such as osteoarthritis, avascular necrosis, 1. ankylosis, protrusio acetabuli, and painful hip dysplasia;
- inflammatory degenerative joint disease such as rheumatoid arthritis; 2.
- correction of functional deformity; and, 3.
- revision procedures where other treatments or devices have failed ধ:
Rough grit blast surfaces are intended for uncemented arthroplasty. The PROFEMUR® Z Revision Hip Stem is intended for cementless hip arthroplasty.
## B. Device Description
Design features of the subject stems are summarized below:
- . Cementless modular stems
- Available in 9 sizes ●
- Manufactured from Titanium alloy with a heavy grit blasted surface .
The subject device is available in 9 sizes (from size 3 to 11). Although the proximal geometries are identical to the predicate from size 3-9, the distal stem length has increased, with two larger sizes (10 and 11) introduced.
## C. Nonclinical Testing
The PROFEMUR® Z Revision Hip Stems have been tested in distal and proximal fatigue evaluation per the loading regimen prescribed by ISO 7206-4, -6 and -8.
#### D. Clinical Testing
Clinical data was not provided for the class III hip stem.
## E. Conclusions
The indications for use of the PROFEMUR® Z Revision Hip Stems are identical to the previously cleared predicate devices. The design features and materials of the subject devices are substantially equivalent to those of the predicate devices. The fundamental scientific technology of the modified devices has not changed relative to the predicate devices. The safety and effectiveness of the PROFEMUR® Z Revision Hip Stem is adequately supported by the substantial equivalence information, materials information, and analysis data provided within this Premarket Notification.
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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 consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" around the perimeter. Inside the circle is a stylized image of an eagle with its wings outstretched.
#### Public Health Service
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room -WO66-G609 Silver Spring, MD 20993-0002
OCT 1 1 1 2012
Wright Medical Technology, Incorporated
% Mr. Dean Nachtrab
Regulatory Affairs Specialist
5677 Airline Road
Arlington, Tennessee 38002
Re: K122778
Trade/Device Name: PROFEMUR® Z Revision Hip Stem Regulation Number: 21 CFR 888.3330 Regulation Name: Hip joint metal/metal semi-constrained, with an uncemented acetabular component, prosthesis Regulatory Class: Class III Product Code: KWA, JDL Dated: August 29, 2012 Received: September 11, 2012
Dear Mr. Nachtrab:
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. 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
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# Page 2 - Mr. Dean Nachtrab
CFR Part 807); labeling (21 CFR Part 801); medical device reporting (reporting of medical 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/Resourcesfor You/Industry/default.htm.
Sincerely yours.
Eric 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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# Indications for Use
510(k) Number (if known): K122778
Device Name: PROFEMUR® Z Revision Hip Stem
Indications For Use:
- non-inflammatory degenerative joint disease such as osteoarthritis, avascular 1. necrosis, ankylosis, protrusio acetabuli, and painful hip dysplasia;
- inflammatory degenerative joint disease such as rheumatoid arthritis; 2.
- correction of functional deformity; and, ന്
- revision procedures where other treatments or devices have failed. 4.
Rough grit blast surfaces are intended for uncemented arthroplasty. The PROFEMUR® Z Revision Hip Stem is intended for cementless hip arthroplasty.
Prescription Use _ × (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)
Peter G. Allen
(Division Sign-C Division of Surgical, Orthopedic, and Restorative Devices
510(k) Number K122778
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.
