The TaperFit Hip Stem is indicated for the relief of pain and restoration of hip function following the effects of femoral neck fracture, osteo, rheumatoid and inflammatory arthritis, post-traumatic disease effects, avascular necrosis and total hip revision. The TaperFit Hip Stem is indicated for hemi-arthroplasty when used in combination with Corin Bipolar Prosthesis hemi-arthroplasty femoral heads. The TaperFit Hip Stem is indicated for cemented, single use only.
Device Story
TaperFit Hip Stem is a highly polished, double-tapered, collarless, stainless steel femoral hip stem; features 12/14 tapered male trunnion for modular femoral head assembly. Used in cemented hip arthroplasty and hemi-arthroplasty procedures. Operated by orthopedic surgeons in clinical/hospital settings. Device provides structural support for hip joint replacement; modular design allows compatibility with Corin Eurocone and Trinity CoCrMo femoral heads or Corin Bipolar Femoral Heads. Benefits include pain relief and restoration of hip function for patients with degenerative or traumatic hip conditions.
Clinical Evidence
No clinical data. Bench testing only, including FEA, mechanical fatigue, static, rotational torque, fretting, corrosion, and range of motion testing, previously submitted in K142761, K992234, and K003666.
Technological Characteristics
Highly polished, double-tapered, collarless femoral stem. Material: Wrought high nitrogen stainless steel (ISO 5832-9). Includes PMMA stem centralizer. 12/14 tapered male trunnion. Sizes 0-4; offsets 50mm, 45mm, 38mm, and CDH 36mm. Cemented, single-use.
Indications for Use
Indicated for patients requiring hip pain relief and function restoration due to femoral neck fracture, osteoarthritis, rheumatoid/inflammatory arthritis, post-traumatic disease, avascular necrosis, or total hip revision. Also indicated for hemi-arthroplasty when used with compatible bipolar femoral heads. Cemented, single-use only.
Regulatory Classification
Identification
A hip joint metal/polymer semi-constrained cemented 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 includes prostheses that have a femoral component made of alloys, such as cobalt-chromium-molybdenum, and an acetabular resurfacing component made of ultra-high molecular weight polyethylene and is limited to those prostheses intended for use with bone cement (§ 888.3027).
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
March 25, 2016
Corin USA Limited Ms. Diana L. Nader-Martone Regulatory Affairs Associate 5670 West Cypress Street, Suite C Tampa, Florida 33607
Re: K153725
Trade/Device Name: Taperfit Hip Stem Regulation Number: 21 CFR 888.3350 Regulation Name: Hip joint metal/polymer semi-constrained cemented prosthesis Regulatory Class: Class II Product Code: JDI, JDG, KWY Dated: December 23, 2015 Received: December 28, 2015
Dear Ms. Nader-Martone:
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 CFR Part 807); labeling (21 CFR Parts 801); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set
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Page 2 - Ms. Diana L. Nader-Martone
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 contact the Division of Industry and Consumer Education 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. 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 Industry and Consumer Education 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 vours.
Mark N. Melkerson -S
Mark N. Melkerson Director Division of Orthopedic Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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### Indications for Use
510(k) Number (if known) K153725
Device Name TaperFit Hip Stem
Indications for Use (Describe)
The TaperFit Hip Stem is indicated for the relief of pain and restoration following the effects of femoral neck fracture, osteo, rheumatoid and inflammatory arthritis, post-traumatic disease effects, avascular necrosis and total hip The TaperFit Hip Stem is indicated for hemi-arthroplasty when used in combination with Corin Bipolar revision. Prosthesis hemi-arthroplasty femoral heads.
The TaperFit Hip Stem is indicated for cemented, single use only.
Type of Use (Select one or both, as applicable)
> Prescription Use (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (21 CFR 801 Subpart C)
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| 1. Applicant/Sponsor:<br>Distributor | Corin USA<br>5670 W. Cypress Street<br>Suite C<br>Tampa, Florida 33607<br>Establishment Registration No.: 1056629 |
|--------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2. Contact Person: | Diana L. Nader-Martone<br>Regulatory Affairs Associate<br>Corin USA<br>813-977-4469<br>diana.nader-martone@coringroup.com<br><br>Kathy Trier<br>VP Global Regulatory and Clinical Affairs<br>Corin USA<br>813-977-4469<br>kathy.trier@coringroup.com |
| 3. Date: | March 24, 2016 |
| 4. Proprietary Name: | TaperFit Hip Stem |
| 5. Common Name: | Hip Prosthesis |
| 6. Product Code(s): | JDI, JDG, KWY |
## 7. Classification Name:
21CFR 888.3350 – Hip joint metal/polymer semi-constrained cemented prosthesis 21CFR 888.3390 - Hip joint femoral (hemi-hip) metal/polymer cemented or uncemented prosthesis 21CFR 888.3360 – Hip joint femoral (hemi-hip) metallic cemented or uncemented prosthesis
## 8. Legally Marketed Devices to which Substantial Equivalence is claimed:
- Corin TaperFit Hip Stem (K142761) ●
- Corin Taper-Fit Hip Stem (K992234, K003666) .
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## 9. Device Description:
The TaperFit Hip Stem is a highly polished, double tapered, collarless, stainless steel femoral hip stem featuring a 12/14 tapered male trunnion for assembly with modular femoral head components. The stem is manufactured from stainless steel in accordance with ISO 5832-9 -Implants for surgery -- Metallic materials -- Part 9: Wrought high nitrogen stainless steel and is provided with a polymethylmethacrylate (PMMA) Stem Centralizer. The stem is designed to be used in conjunction with Corin Eurocone (E100.XXX cleared in K003666) and Trinity CoCrMo modular femoral heads (E321.XXX cleared in K093472, K110087, K122305, K123705, K130128, K130343 and K131647). The stem is available in sizes, 0 through 4 with 3 offsets 50mm, 45mm, and 38mm, as well as a CDH option with a 36mm offset.
The TaperFit Hip Stem was originally cleared in K142761. This submission is being made to modify the indications for use to include hemi-arthroplasty when used with previously cleared Corin hemi-arthroplasty femoral heads as compatible components. The Corin CoCr Modular 26mm heads (E100.X26) have been cleared as compatible components of the Taper-Fit Hip stem (K003666). The Corin CoCr Modular 26mm heads (E100.X26) are part of the construct of the bipolar heads. Included in this submission is the Corin Bipolar Femoral Head (K925897) as a compatible component, which is indicated for hemi-arthroplasty.
## 10. Intended Use / Indications:
The TaperFit Hip Stem is indicated for the relief of pain and restoration of hip function following the effects of femoral neck fracture, osteo, rheumatoid and inflammatory arthritis, post-traumatic disease effects, avascular necrosis and total hip revision. The TaperFit Hip Stem is indicated for hemi-arthroplasty when used in combination with Corin Bipolar Prosthesis hemi-arthroplasty femoral heads.
The TaperFit Hip Stem is indicated for cemented, single use only.
# 11. Summary of Technologies / Substantial Equivalence:
The TaperFit Hip Stem, subject of this submission, and the predicate TaperFit Hip Stem (K142761) are identical in design, materials, coating, and sizes and similar in terms of intended use/indications for use. Additionally, the TaperFit Hip Stem, subject of this submission, and the predicates, Taper-Fit Hip Stem (K992234 and K003666) are identical in materials, and coating, and similar in terms of design, sizes, and intended use/indications for use. Based on these similarities, Corin believes that the TaperFit Hip Stem is substantially equivalent to the predicate devices.
# 12. Non-Clinical Testing:
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Non-clinical testing and analysis included FEA, mechanical fatigue testing, static testing, rotational torque testing, fretting and corrosion testing, and range of motion testing. This testing was performed and submitted in the previous TaperFit and Taper-Fit Hip Stem submissions (K142761, K992234, and K003666).
# 13. Clinical Testing:
Clinical testing was not necessary in this Traditional 510(k).
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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.