K Number
K970300
Device Name
NATURAL-HIP SYSTEM POROUS STEM WITH HA/CSTI
Date Cleared
1997-07-03

(160 days)

Product Code
Regulation Number
888.3358
AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP Authorized
Intended Use
- Patient conditions of non-inflammatory degenerative joint disease (NIDJD), e.g., 1. avascular necrosis, osteoarthritis and inflammatory joint disease (IJD), e.g., rheumatoid arthritis. - Those patients with failed previous surgery where pain, deformity, or dysfunction 2. persists. - Revision of previously failed arthroplasty. 3. The Natural-Hip™ System Porous Stem with HA/CSTi™ is intended only for use without bone cement.
Device Description
The Natural-Hip System Porous Stem with HA/CSTi is a straight stem manufactured from Ti-6Al-4V alloy conforming to ASTM F-136. The stem is available in both a collared and collarless design. The proximal anterior surface of the stem employs anterior angulation or build-up to match the anatomic angulation of a natural femur. The superior portion of the stem has a built-in anteversion of nine degrees to match the anatomic anteversion of the femur. Circumferential hydroxylapatite coated Cancellous Structured Titanium™ (CSTi™) porous coating provides biological fixation in a cementless application. The distal portion of the Natural-Hip System Porous Stem with HA/CSTi employs ribs and flutes on the anterior and posterior sides to enhance cortical contact, thereby providing rotational stability to the hip stem. In addition, the distal portion of the stem has a flared coronal slot which reduces stiffness of the stem.
More Information

Not Found

No
The device description focuses on the material, design, and mechanical features of a hip stem implant, with no mention of software, algorithms, or data processing that would indicate AI/ML. The "Mentions AI, DNN, or ML" and "Mentions image processing" sections are explicitly marked as "Not Found".

Yes

The device, a hip stem, is intended for patients with degenerative and inflammatory joint diseases, or failed previous surgeries, to replace the natural hip. This directly treats or manages a medical condition, fitting the definition of a therapeutic device.

No

This device is a hip stem/prosthesis, used for joint replacement surgery in patients with degenerative or inflammatory joint diseases. Its purpose is to replace a damaged joint, not to diagnose a condition.

No

The device description clearly details a physical implantable hip stem made of Ti-6Al-4V alloy with specific design features and coatings, indicating it is a hardware device, not software.

Based on the provided information, this device is not an IVD (In Vitro Diagnostic).

Here's why:

  • IVD Definition: In vitro diagnostics are tests performed on samples taken from the human body, such as blood, urine, or tissue, to detect diseases, conditions, or infections.
  • Device Description: The description clearly states that this is a "Natural-Hip™ System Porous Stem," which is a surgical implant designed to replace a damaged hip joint. It is a physical device implanted into the body.
  • Intended Use: The intended use describes treating conditions like osteoarthritis and rheumatoid arthritis by replacing the hip joint, not by analyzing biological samples.

Therefore, this device falls under the category of a surgical implant or prosthetic device, not an in vitro diagnostic.

N/A

Intended Use / Indications for Use

The Natural-Hip System Porous Stem with HA/CSTi is intended to replace the anatomy of the femur in cases of total hip or hemi-hip replacement. In addition, the Natural-Hip System Porous Stem with HA/CSTi, like the predicate Intermedics Orthopedics, Inc. (IOI) and competitive hip stems, is intended for cementless (press-fit) application in cases of total hip or hemi-hip arthroplasty.

The general indications associated with the use of the Natural-Hip System Porous Stem with HA/CSTi in total hip arthroplasty include:

  • Patient conditions of noninflammatory degenerative joint disease (NIDJD), e.g., avascular necrosis, osteoarthritis, and inflammatory joint disease (IJD), e.g., rheumatoid arthritis.
  • Those patients with failed previous surgery where pain, deformity, or dysfunction persists.
  • Revision of previously failed hip arthroplasty.

Total hip replacements may be considered for younger patients if any unequivocal indication outweighs the risks associated with the age of the patient, and modified demands regarding activity and hip joint loading are assured. This includes severely crippled patients with multiple joint involvement. for whom an immediate need of hip mobility leads to an expectation of significant improvement in the quality of their lives.

The Natural-Hip System Porous Stem with HA/CSTi is intended only for use without bone cement in the United States. This device is intended for single use only.

Product codes (comma separated list FDA assigned to the subject device)

LPH, MEH

Device Description

The Natural-Hip System Porous Stem with HA/CSTi is a straight stem manufactured from Ti-6Al-4V alloy conforming to ASTM F-136. The stem is available in both a collared and collarless design. The proximal anterior surface of the stem employs anterior angulation or build-up to match the anatomic angulation of a natural femur. The superior portion of the stem has a built-in anteversion of nine degrees to match the anatomic anteversion of the femur. Circumferential hydroxylapatite coated Cancellous Structured Titanium™ (CSTi™) porous coating provides biological fixation in a cementless application. The distal portion of the Natural-Hip System Porous Stem with HA/CSTi employs ribs and flutes on the anterior and posterior sides to enhance cortical contact, thereby providing rotational stability to the hip stem. In addition, the distal portion of the stem has a flared coronal slot which reduces stiffness of the stem.

This device is intended for use with the following previously cleared devices:

Mentions image processing

Not Found

Mentions AI, DNN, or ML

Not Found

Input Imaging Modality

Not Found

Anatomical Site

Femur, Hip Joint

Indicated Patient Age Range

The summary mentions that total hip replacements "may be considered for younger patients if any unequivocal indication outweighs the risks associated with the age of the patient". It also references "adult patients" in the context of the predicate device (Natural-Hip System Porous Stem). Thus it covers adult patients and potentially younger patients under certain conditions.

Intended User / Care Setting

Not Found

Description of the training set, sample size, data source, and annotation protocol

Not Found

Description of the test set, sample size, data source, and annotation protocol

Not Found

Summary of Performance Studies (study type, sample size, AUC, MRMC, standalone performance, key results)

Not Found

Key Metrics (Sensitivity, Specificity, PPV, NPV, etc.)

Not Found

Predicate Device(s): If the device was cleared using the 510(k) pathway, identify the Predicate Device(s) K/DEN number used to claim substantial equivalence and list them here in a comma separated list exactly as they appear in the text. List the primary predicate first in the list.

Not Found

Reference Device(s): Identify the Reference Device(s) K/DEN number and list them here in a comma separated list exactly as they appear in the text.

K905781, K913060, K923734, K942330, K944209, K833404, K873815, K833403, K934159, K850793, K920955, K933203, K942406, K941617, K954800, K955033, K955739

Predetermined Change Control Plan (PCCP) - All Relevant Information for the subject device only (e.g. presence / absence, what scope was granted / cleared under the PCCP, any restrictions, etc).

Not Found

§ 888.3358 Hip joint metal/polymer/metal semi-constrained porous-coated uncemented prosthesis.

(a)
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.(b)
Classification. Class II.

0

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 is to serve as a Summary of Safety and Effectiveness for the Natural-Hip™ System Porous Stem with HA/CSTi™.

| Submitter: | Intermedics Orthopedics, Inc.
9900 Spectrum Drive
Austin, Texas 78717
(512) 432-9900 |
|-------------------------|---------------------------------------------------------------------------------------------------------|
| Date: | January 20, 1997 |
| Contact Person: | Jacquelyn Hughes
Manager, Regulatory Affairs |
| Classification Name: | Hip joint metal/polymer/metal semi-constrained porous-coated
uncemented prosthesis, 21 CFR 888.3358. |
| Common/Usual Name: | Biologically fixed total hip prosthesis, semi-constrained |
| Trade/Proprietary Name: | Natural-Hip™ System Porous Stem with HA/CSTi™ |

PRODUCT DESCRIPTION

The Natural-Hip System Porous Stem with HA/CSTi is a straight stem manufactured from Ti-6Al-4V alloy conforming to ASTM F-136. The stem is available in both a collared and collarless design. The proximal anterior surface of the stem employs anterior angulation or build-up to match the anatomic angulation of a natural femur. The superior portion of the stem has a built-in anteversion of nine degrees to match the anatomic anteversion of the femur. Circumferential hydroxylapatite coated Cancellous Structured Titanium™ (CSTi™) porous coating provides biological fixation in a cementless application. The distal portion of the Natural-Hip System Porous Stem with HA/CSTi employs ribs and flutes on the anterior and posterior sides to enhance cortical contact, thereby providing rotational stability to the hip stem. In addition, the distal portion of the stem has a flared coronal slot which reduces stiffness of the stem.

This device is intended for use with the following previously cleared devices:

000786

1

SPECIFIC DIAGNOSTIC INDICATIONS

The Natural-Hip System Porous Stem with HA/CSTi is intended to replace the anatomy of the femur in cases of total hip or hemi-hip replacement. In addition, the Natural-Hip System Porous Stem with HA/CSTi, like the predicate Intermedics Orthopedics, Inc. (IOI) and competitive hip stems, is intended for cementless (press-fit) application in cases of total hip or hemi-hip arthroplasty.

The general indications associated with the use of the Natural-Hip System Porous Stem with HA/CSTi in total hip arthroplasty include:

  • Patient conditions of noninflammatory degenerative joint disease (NIDJD), e.g., 1. avascular necrosis, osteoarthritis, and inflammatory joint disease (IJD), e.g., rheumatoid arthritis.
  • Those patients with failed previous surgery where pain, deformity, or dysfunction 2. persists.
  • Revision of previously failed hip arthroplasty 3.

Total hip replacements may be considered for younger patients if any unequivocal indication outweighs the risks associated with the age of the patient, and modified demands regarding activity and hip joint loading are assured. This includes severely crippled patients with multiple joint involvement. for whom an immediate need of hip mobility leads to an expectation of significant improvement in the quality of their lives.

The Natural-Hip System Porous Stem with HA/CSTi is intended only for use without bone cement in the United States. This device is intended for single use only.

SUBSTANTIAL EQUIVALENCE

The Natural-Hip System Porous Stem with HA/CSTi is substantially equivalent to the Natural-Hip System Porous Stem (Intermedics Orthopedics, Inc.), the APR Universal Hip System with Calcitite®-Coated CSTi (Intermedics, Inc.), the Howmedica Precision Osteolock, and the Osteonics Omnifit with HA.

2

Image /page/2/Picture/1 description: The image shows the seal of the Department of Health & Human Services (HHS) of the United States of America. The seal features a circular design with the words "DEPARTMENT OF HEALTH & HUMAN SERVICES · USA" arranged around the perimeter. Inside the circle is a stylized representation of a caduceus, a symbol often associated with medicine and healthcare.

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

Lori Kleinschrodt Holder, RAC Regulatory Affairs Specialist Sulzer Orthopedics Inc. - -9900 Spectrum Drive Austin, Texas 78717

JUL - 3 1997

Re : K970300 Natural-Hip™ System Porous Stem with HA/CSTi™ Requlatory Class: II Product Codes: LPH and MEH Dated: April 23, 1997 Received: April 25, 1997

Dear Ms. Holder:

We have reviewed your Section 510(k) notification of intent to market the device referenced above and we have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to 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, Druq, and Cosmetic Act (Act). This decision is based on consideration of the specific design of stem and coating composition detailed in this application. You may, therefore, market the device, subject to the general controls provisions of the Act and the following limitation:

You may not label or in any way promote these devices for enhanced clinical or radiographic performance, enhanced biological fixation and/or long-term stable fixation. The data presented support equivalence with no additional claims over a conventional porous-coated uncemented hip prosthesis (i.e., biological fixation, only).

Additional limitations for more specific claims of safety and effectiveness may be forthcoming. Should additional limitations be applied you will be contacted in writing to inform you of the additional labeling limitations.

3

Paqe 2 - Lori Kleinschrodt Holder, RAC

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.

You may market your device under the above limitations as class II devices. These devices would be considered not substantially equivalent to a legally marketed predicate device if labeled with other intended uses and/or claims of safety or effectiveness. Any other intended uses or claims may cause the device to be classified into Class III under Section 513 (f) of the Act. Class III devices are required to have an approved premarket approval (PMA) application prior to marketing.

Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 895. A substantially equivalent determination assumes compliance with the current Good Manufacturing Practice requirements, as set forth in the Quality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic (QS) inspections, the Food and Drug Administration (FDA) will verify such assumptions. In addition, FDA may publish further announcements concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal Laws or Regulations.

This letter will allow you to begin marketing your device as described in your 510(k) premarket notification immediately. An FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and permits your device to proceed to the market .

If you desire specific advice for your device on our labeling requlation (21 CFR Part 801 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4659. Additionally, for questions on

4

Page 3 - Lori Kleinschrodt Holder, RAC

the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). Other qeneral information on your responsibilities under the Act may be ... obtained from the Division of Small Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address "http://www.fda.gov/cdrh/dsmamain.html".

Sincerely yours,

Celia M. Witten, Ph.D., M.D. Director Division of General and Restorative Devices Office of Device Evaluation Center for Devices and Radioloqical Health

Enclosure

5

510(k) Number (if known): K970300

Device Name: Natural-Hip™ System Porous Stem with HA/CSTi™

Indications For Use:

  • Patient conditions of non-inflammatory degenerative joint disease (NIDJD), e.g., 1. avascular necrosis, osteoarthritis and inflammatory joint disease (IJD), e.g., rheumatoid arthritis.
  • Those patients with failed previous surgery where pain, deformity, or dysfunction 2. persists.
  • Revision of previously failed arthroplasty. 3.

The Natural-Hip™ System Porous Stem with HA/CSTi™ is intended only for use without bone cement.

(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)

Concurrence of CDRH, Office of Device Evaluation (ODE)

Prescription Use

OR

Over-The-Counter Use _________________________________________________________________________________________________________________________________________________________

(Optional Format 1-2-96)