Anatomic Total Shoulder Applications: • Osteoarthritis • The patient must be anatomically and structurally suited, as evident by scapula and proximal humerus closure, to receive the implants. OsseoFit® Stemless Shoulder humeral components have a porous surface and are indicated for uncemented biological fixation applications Compatible Glenoid components are intended to be implanted with bone cement. The porous posts may be inserted without bone cement. Compatible Convertible Glenoid Baseplate components are intended for cementless applications with the addition of screw fixation.
Device Story
OsseoFit Stemless Shoulder System is an anatomic total shoulder prosthesis; includes stemless humeral anchor with porous surface for biological fixation; used with compatible humeral heads and glenoid components. Subject submission adds modular 'Universal' surgical broaches to facilitate humeral anchor implantation. Broaches consist of 2-piece construction (proximal and distal bodies) allowing intra-operative flexibility between Inlay and Onlay configurations; assembled broaches replicate geometry of previously cleared monoblock broaches. Used by orthopedic surgeons in clinical settings for bone preparation during shoulder arthroplasty. System provides structural support for joint replacement; porous surface promotes biological fixation.
Clinical Evidence
No clinical data provided. Substantial equivalence supported by non-clinical bench testing of the new Universal Broaches, confirming they meet acceptance criteria for structural integrity and extraction capability during surgical use.
Technological Characteristics
System includes stemless humeral anchor with OsseoTi porous technology. Universal Broaches are 2-piece modular instruments (proximal/distal bodies) for bone preparation. Materials and sterilization methods are identical to the predicate. Devices are non-sterile, reusable instruments.
Indications for Use
Indicated for adults requiring anatomic total shoulder arthroplasty due to osteoarthritis. Patients must have closed proximal humerus and scapula growth plates. Humeral components are for uncemented biological fixation; glenoid components are for cemented or cementless (screw-fixed) use.
Regulatory Classification
Identification
A shoulder joint metal/polymer semi-constrained cemented prosthesis is a device intended to be implanted to replace a shoulder 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 have a humeral resurfacing component made of alloys, such as cobalt-chromium-molybdenum, and a glenoid resurfacing component made of ultra-high molecular weight polyethylene, and is limited to those prostheses intended for use with bone cement (§ 888.3027).
Special Controls
*Classification.* Class II. The special controls for this device are:(1) FDA's:
(i) “Use of International Standard ISO 10993 ‘Biological Evaluation of Medical Devices—Part I: Evaluation and Testing,’ ”
(ii) “510(k) Sterility Review Guidance of 2/12/90 (K90-1),”
(iii) “Guidance Document for Testing Orthopedic Implants with Modified Metallic Surfaces Apposing Bone or Bone Cement,”
(iv) “Guidance Document for the Preparation of Premarket Notification (510(k)) Application for Orthopedic Devices,” and
(v) “Guidance Document for Testing Non-articulating, ‘Mechanically Locked’ Modular Implant Components,”
(2) International Organization for Standardization's (ISO):
(i) ISO 5832-3:1996 “Implants for Surgery—Metallic Materials—Part 3: Wrought Titanium 6-aluminum 4-vandium Alloy,”
(ii) ISO 5832-4:1996 “Implants for Surgery—Metallic Materials—Part 4: Cobalt-chromium-molybdenum casting alloy,”
(iii) ISO 5832-12:1996 “Implants for Surgery—Metallic Materials—Part 12: Wrought Cobalt-chromium-molybdenum alloy,”
(iv) ISO 5833:1992 “Implants for Surgery—Acrylic Resin Cements,”
(v) ISO 5834-2:1998 “Implants for Surgery—Ultra-high Molecular Weight Polyethylene—Part 2: Moulded Forms,”
(vi) ISO 6018:1987 “Orthopaedic Implants—General Requirements for Marking, Packaging, and Labeling,” and
(vii) ISO 9001:1994 “Quality Systems—Model for Quality Assurance in Design/Development, Production, Installation, and Servicing,” and
(3) American Society for Testing and Materials':
(i) F 75-92 “Specification for Cast Cobalt-28 Chromium-6 Molybdenum Alloy for Surgical Implant Material,”
(ii) F 648-98 “Specification for Ultra-High-Molecular-Weight Polyethylene Powder and Fabricated Form for Surgical Implants,”
(iii) F 799-96 “Specification for Cobalt-28 Chromium-6 Molybdenum Alloy Forgings for Surgical Implants,”
(iv) F 1044-95 “Test Method for Shear Testing of Porous Metal Coatings,”
(v) F 1108-97 “Specification for Titanium-6 Aluminum-4 Vanadium Alloy Castings for Surgical Implants,”
(vi) F 1147-95 “Test Method for Tension Testing of Porous Metal,”
(vii) F 1378-97 “Standard Specification for Shoulder Prosthesis,” and
(viii) F 1537-94 “Specification for Wrought Cobalt-28 Chromium-6 Molybdenum Alloy for Surgical Implants.”
{0}
**FDA** U.S. FOOD & DRUG
ADMINISTRATION
September 24, 2026
Zimmer, Inc.
Alexandria Irwin
Regulatory Affairs Sr Specialist
1800 W. Center St.
Warsaw, Indiana 46580
Re: K262955
Trade/Device Name: OsseoFit Stemless Shoulder System
Regulation Number: 21 CFR 888.3660
Regulation Name: Shoulder joint metal/polymer semi-constrained cemented prosthesis
Regulatory Class: Class II
Product Code: PKC
Dated: August 24, 2026
Received: August 24, 2026
Dear Alexandria Irwin:
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 (the 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 available 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.
Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device"
{1}
K262955 - Alexandria Irwin
Page 2
(https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download).
Your device is also subject to, among other requirements, the Quality Management System Regulation (QMSR) (21 CFR Part 820), which includes, but is not limited to, ISO 13485 clause 7.3 (Design controls), ISO 13485 clause 8.3 (Nonconforming product), ISO 13485 clause 8.5.2 (Corrective action), and ISO 13485 clause 8.5.3 (Preventative action). Please note that regardless of whether a change requires premarket review, the QMSR requires device manufacturers to review and approve changes to device design and production (ISO 13485 clause 7.3 and ISO 13485 clause 7.5) and document changes and approvals in the Medical Device File (ISO 13485 clause 4.2.3).
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 device-related adverse events) (21 CFR Part 803) for devices or postmarketing safety reporting (21 CFR Part 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reporting-combination-products); good manufacturing practice requirements as set forth in the Quality Management System Regulation (QMSR) (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050.
All medical devices, including Class I and unclassified devices and combination product device constituent parts are required to be in compliance with the final Unique Device Identification System rule ("UDI Rule"). The UDI Rule requires, among other things, that a device bear a unique device identifier (UDI) on its label and package (21 CFR 801.20(a)) unless an exception or alternative applies (21 CFR 801.20(b)) and that the dates on the device label be formatted in accordance with 21 CFR 801.18. The UDI Rule (21 CFR 830.300(a) and 830.320(b)) also requires that certain information be submitted to the Global Unique Device Identification Database (GUDID) (21 CFR Part 830 Subpart E). For additional information on these requirements, please see the UDI System webpage at https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory-assistance/unique-device-identification-system-udi-system.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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-devices/medical-device-safety/medical-device-reporting-mdr-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/medical-devices/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-devices/device-advice-comprehensive-regulatory-assistance/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).
{2}
K262955 - Alexandria Irwin
Page 3
Sincerely,
Joseph P. Russell -S
for: Farzana Sharmin, PhD
Assistant Director
DHT6A: Division of Joint Arthroplasty Devices
OHT6: Office of Orthopedic Devices
Office of Product Evaluation and Quality
Center for Devices and Radiological Health
Enclosure
{3}
| Indications for Use | | |
| --- | --- | --- |
| Please type in the marketing application/submission number, if it is known. This textbox will be left blank for original applications/submissions. | K262955 | ? |
| Please provide the device trade name(s). | | ? |
| OsseoFit Stemless Shoulder System | | |
| Please provide your Indications for Use below. | | ? |
| Implant Indications:Anatomic Total Shoulder Applications:• Osteoarthritis• The patient must be anatomically and structurally suited, as evident by scapula and proximal humerus closure, to receive the implants.OsseoFit® Stemless Shoulder humeral components have a porous surface and are indicated for uncemented biological fixation applicationsCompatible Glenoid components are intended to be implanted with bone cement. The porous posts may be inserted without bone cement.Compatible Convertible Glenoid Baseplate components are intended for cementless applications with the addition of screw fixation. | | |
| Please select the types of uses. | Prescription Use (21 CFR 801 Subpart D)Over-The-Counter Use (21 CFR 801 Subpart C) | ? |
| Please select the age group(s) for which the device(s) is to be used. | Neonates/Newborns (Birth to < 29 days old)Infants (29 days old to < 2 years old)Children (2 years old to < 12 years old)Adolescents (12 years old to < 22 years old)Adults (22 years old and greater) | ? |
{4}
510(k) #: K262955
510(k) Summary
Prepared on: 2026-09-18
# Contact Details
21 CFR 807.92(a)(1)
Applicant Name
Zimmer, Inc.
Applicant Address
1800 W Center St Warsaw IN 46580 United States
Applicant Contact Telephone
2604049023
Applicant Contact
Mrs. Alexandria Irwin
Applicant Contact Email
alexandria.irwin@zimmerbiomet.com
# Device Name
21 CFR 807.92(a)(2)
Device Trade Name
OsseoFit Stemless Shoulder System
Common Name
Shoulder joint metal/polymer semi-constrained cemented prosthesis
Classification Name
Prosthesis, Total Anatomic Shoulder, Uncemented Metaphyseal Humeral Stem With No Diaphyseal Incursion, Semi-Constrained
Regulation Number
888.3660
Product Code(s)
PKC
# Legally Marketed Predicate Devices
21 CFR 807.92(a)(3)
Predicate #
Predicate Trade Name (Primary Predicate is listed first)
Product Code
K241873
OsseoFit Stemless Shoulder System
PKC
# Device Description Summary
21 CFR 807.92(a)(4)
The OsseoFit Stemless Shoulder System consists of a stemless humeral implant and humeral head adapter for anatomic total shoulder applications. The OsseoFit Stemless Shoulder System includes an anatomical (left/right specific), asymmetric humeral anchor with OsseoTi porous technology to allow biological fixation and is intended for cementless use with the Identity Shoulder System Humeral Heads. The Identity heads can be used with a compatible Alliance Glenoid Implant or Comprehensive Convertible Baseplate liner.
The OsseoFit Stemless Shoulder System was previously cleared under K241873 with device-specific Monoblock Broaches. This Special 510(k) is being submitted to add new device-specific surgical instruments intended to facilitate implantation of the OsseoFit humeral anchor. Specifically, the subject submission adds Universal (also known as modular) broaches, which are provided as non-sterile, reusable instruments.
The OsseoFit Universal Broaches are a 2-piece construction, consisting of a Proximal Broach Body and a Distal Broach Body, which allow for intra-operative flexibility between Inlay and Onlay configurations. The Proximal Broach Body is offered in Left or Right configurations. The Distal Broach Body is offered in Sizes 1-5 in Left and Right configurations. When the Proximal and Distal Broach Body are assembled together, they replicate the previously cleared Monoblock Broaches
# Intended Use/Indications for Use
21 CFR 807.92(a)(5)
Anatomic Total Shoulder Applications:
- Osteoarthritis
- The patient must be anatomically and structurally suited, as evident by scapula and proximal humerus closure, to receive the implants.
{5}
OsseoFit® Stemless Shoulder humeral components have a porous surface and are indicated for uncemented biological fixation applications
Compatible Glenoid components are intended to be implanted with bone cement. The porous posts may be inserted without bone cement.
Compatible Convertible Glenoid Baseplate components are intended for cementless applications with the addition of screw fixation.
## Indications for Use Comparison
21 CFR 807.92(a)(5)
The subject device has the same intended and indications for use as the predicate device.
## Technological Comparison
21 CFR 807.92(a)(6)
The subject devices have similar technological characteristics as the predicate device. The proposed and predicate devices are utilized in the identical anatomical site during bone preparation and are terminally sterilized by the healthcare facility in the same manner.
The rationale for substantial equivalence is based on consideration of the following characteristics:
- Intended Use: Identical to predicate
- Indications for Use: Identical to predicate
- Materials: Identical to predicate
- Design Features: Similar to predicate. The OsseoFit Universal Broaches are a 2-piece construction, consisting of a Proximal Broach Body and a Distal Broach Body. The Proximal Broach Body is offered in Left or Right configurations. The Distal Broach Body is offered in Sizes 1-5 in Left and Right configurations. When the Proximal and Distal Broach Body are assembled together, they replicate the Predicate Device Monoblock Broach geometry.
- Packaging: Identical to predicate
- Sterilization: Identical to predicate
## Non-Clinical and/or Clinical Tests Summary & Conclusions
21 CFR 807.92(b)
Non-Clinical Tests/Justifications:
- Physical testing was performed utilizing the subject Universal Broaches and applicable accessory instrumentation. The subject Universal Broaches successfully met the acceptance criteria to withstand the loads experienced during use and to be capable of being extracted from the joint space after use.
Animal and Clinical Tests:
- None provided
Based on non-clinical evaluations and a comparison of device technology, the subject device is substantially equivalent to the predicate device.
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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 as a Medical Device, 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 as a Medical Device), 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
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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.
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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.
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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
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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.