The Medacta Total Hip Prosthesis System - Quadra C Femoral Stems are intended for cemented use in total or partial hip arthroplasty and in primary or revision surgery.

Hip replacement is indicated in the following cases:

Severely painful and/or disabled joint as a result of arthritis, traumatic arthritis, rheumatoid polyarthritis, or congenital hip dysplasia
Avascular necrosis of the femoral head
Acute traumatic fracture of the femoral head or neck
Failure of previous hip surgery, joint reconstruction, internal fixation, arthrodesis, hemiarthroplasty, surface replacement arthroplasty, or total hip replacement.

Size 0 implants should not be implanted in patients with a mass of 65 kg or greater.

Device Description

The Medacta Total Hip Prosthesis System – Quadra C femoral stem is a highly polished, collarless femoral component manufactured from forged stainless steel according to ISO 5832-9. The Quadra C femoral stem is a straight quadratic stem with a triple taper shape. The Quadra C femoral stems come in eight sizes with a standard offset and seven sizes with a lateral offset. The proximal portion of the stem has a standard 12/14 taper for mechanical attachment to cleared Medacta International metallic or ceramic femoral heads.

AI/ML Overview

Here's an analysis of the provided text regarding the acceptance criteria and study for the Medacta Total Hip Prosthesis – Quadra C femoral stems:

Acceptance Criteria and Device Performance

Acceptance Criteria	Reported Device Performance
Performance tested in accordance with various international standards and FDA guidance documents.	Quadra C femoral stems were tested as part of design verification to written protocols.
Pre-defined acceptance criteria based on international standards and FDA guidance.	Testing met all acceptance criteria.
Testing conducted on the worst-case component size and option/design.	Testing was conducted on the worst-case component size and option/design.
Performance demonstrates substantial equivalence to predicate devices (Sulzer Orthopedics MS-30 standard and lateral femoral stems, and Medacta Total Hip Prosthesis System - Quadra S femoral stems).	Testing verifies that the performance of the Medacta Total Hip Prosthesis- Quadra C femoral stems are substantially equivalent to the predicate devices.

Study Information

Sample size used for the test set and the data provenance:
- The document states that "Testing was conducted on the worst-case component size and option/design." No specific numerical sample size (e.g., number of stems tested) for the test set is provided.
- Data Provenance: The study was conducted as "design verification" by the manufacturer, Medacta International SA (Switzerland). The testing was for the purpose of demonstrating substantial equivalence to predicate devices for FDA clearance in the USA. The specific location where the physical testing occurred is not explicitly stated beyond the manufacturer's country of origin. The data is prospective as it was generated specifically for this submission.
Number of experts used to establish the ground truth for the test set and the qualifications of those experts:
- Not applicable. This device is a mechanical implant, and its performance is evaluated against engineering and material standards through physical testing, not against expert interpretation of data like images or patient outcomes. Ground truth is established by the relevant engineering standards and FDA guidance.
Adjudication method for the test set:
- Not applicable. As described above, the evaluation is based on objective measurements against engineering standards, not subjective expert judgment requiring adjudication.
If a multi-reader multi-case (MRMC) comparative effectiveness study was done, if so, what was the effect size of how much human readers improve with AI vs without AI assistance:
- Not applicable. This is a medical device (hip prosthesis), not an AI/software device that assists human readers with interpretation.
If a standalone (i.e., algorithm only without human-in-the-loop performance) was done:
- Not applicable. This is a medical device (hip prosthesis), not an AI/software device. The performance testing described is inherently "standalone" in the sense that it's testing the physical device itself against pre-defined engineering criteria.
The type of ground truth used (expert consensus, pathology, outcomes data, etc.):
- The ground truth is based on pre-defined acceptance criteria derived from international standards (e.g., ISO 5832-9) and FDA guidance documents for orthopedic implant performance. These standards specify mechanical, material, and biocompatibility requirements.
The sample size for the training set:
- Not applicable. This is a physical medical device, not a machine learning algorithm that requires a "training set."
How the ground truth for the training set was established:
- Not applicable, as there is no training set for a physical medical device.

Summary

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K083558 # 1/

Medacta
International

6 2009 MAR

Traditional 510(k) Summary

MEDACTA International SA Manufacturer: Strada Regina CH6874 Castel San Pietro Switzerland Phone (+41) 91 696 60 60 FAX (+41) 91 696 60 66

Contact Person:

Ms. Natalie J. Kennel Consultant NJK & Associates, Inc. 13721 Via Tres Vista San Diego, CA 92129 USA Phone: (858) 705-0350 Fax: (858) 764-9739 email: NKennel@njkconsulting.com

Feb. 23, 2009 Date Prepared:

DEVICE INFORMATION

Trade/Proprietary Name: Medacta Total Hip Prosthesis – Quadra C femoral stems Hip Joint, metal/ceramic/polymer Common/Classification Name: semi-constrained cemented or nonporous uncemented prosthesis 21 CFR 888.3353 Class II Device Product Code: LZO, JDI

Medata Total Hip Prosthesis - Quadra S femoral Predicate Devices: stems, K072857, cleared on Feb. 4, 2008 Sulzer Orthopedics MS-30 Femoral Stem, K993043, cleared on Dec. 2, 1999 Sulzer Orthopedics MS-30 Lateral Femoral Stems, K020713, cleared on May 14, 2002

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K083558 #2/3

Product Description:

Indications for Use:

The Medacta Total Hip Prosthesis System- Quadra C femoral stems are intended for cemented use in total or partial hip arthroplasty and in primary or revision surgery.

Hip replacement is indicated in the following cases:

Severely painful and/or disabled joint as a result of arthritis, traumatic . arthritis, rheumatoid polyarthritis, or congenital hip dysplasia
Avascular necrosis of the femoral head .
Acute traumatic fracture of the femoral head or neck .
Eailure of previous hip surgery, ioint reconstruction, internal fixation. . arthrodesis, hemiarthroplasty, surface replacement arthroplasty, or total hip replacement.

Size 0 implants should not be implanted in patients with a mass of 65 kg or greater.

Comparison to Predicate Device:

The Medacta Total Hip Prosthesis - Quadra C femoral stems are similar in intended use, materials and general design to the Sulzer Orthopedics MS-30 standard and lateral femoral stems. The Quadra C femoral stems are intended for cemented use only and are manufactured from forged stainless steel according to ISO 5832-9, the same as the MS-30. The general shape, design, and 12/14 taper of the Quadra C femoral stems is the same as the MS-30 femoral stems.

The Quadra C femoral stems are essentially identical to their other predicate, Quadra S femoral stems, in terms of shape and dimensions. The Quadra C femoral stems have the identical neck, taper, length and offset. The Quadra C femoral stems come in a subset of sizes that are identical to the Quadra S in terms of length and shape except that they have a smooth highly polished surface instead of the macrostructures on the Quadra S with its sandblasted surface. The Quadra C femoral stems work with the same range of ball heads cleared under the original Medacta Total Prosthesis System - Quadra

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Image /page/2/Picture/0 description: The image contains handwritten text that appears to be a combination of numbers and symbols. The numbers "6083558" are written in a cursive style. To the right of the numbers, there is a symbol that looks like "#3" followed by a vertical line and another symbol that is difficult to decipher but appears to be a combination of lines and curves. The writing is in black ink on a white background.

S, K072857, and subsequent submissions for the MectaCer Ceramic ball heads. K073337, and for additional CoCrMo ball heads sizes, K080885. The Quadra C femoral stems with these ball heads work with the Ortho Development's Triplus® Acetubular cups and liners. They can also be used with Medacta CoCrMo femoral ball heads of sizes 22 and 28 and the Ortho Development's Pivot Bipolar heads. These system compatibilities are the same as the predicate device, Quadra S femoral stems.

Performance Testing

No performance standards applicable to this device have been adopted under Section 514 of the Food, Drug and Cosmetic Act. Performance testing of the Quadra C femoral stems was conducted in accordance with various international standards and FDA guidance documents.

The Quadra C femoral stems were tested as part of design verification to written protocols with pre-defined acceptance criteria. The protocols and predefined acceptance criteria were based on the international standards and FDA quidance. The testing was conducted on the worst case component size and option/design. The testing met all acceptance criteria and verifies that the performance of the Medacta Total Hip Prosthesis- Quadra C femoral stems are substantially equivalent to the predicate devices.

Conclusion:

The data and information provided in this submission support the conclusion that the Medacta Total Hip Prosthesis System – Quadra C femoral stems are substantially equivalent to their predicates, Sulzer Orthopedics MS-30 standard and lateral femoral stems and Medacta Total Hip Prosthesis System - Quadra S femoral stems, with respect to intended use, materials, design and technological characteristics.

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Image /page/3/Picture/1 description: The image shows the seal of the U.S. Department of Health and Human Services. The seal features a stylized eagle with three legs, representing the department's mission to protect the health of all Americans and provide essential human services. The words "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" are arranged in a circular pattern around the eagle.

& 2009 MAR

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

Medacta International, SA % NJK & Associates, Inc. Ms. Natalie J. Kennel 13721 Via Tres Vista San Diego, California 92129

Re: K083558

Trade/Device Name: Medacta Total Hip Prosthesis System - Quadra C Femoral Stems Regulation Number: 21 CFR 888.3353

Regulation Name: Hip joint metal/ceramic/polymer semi-constrained cemented or nonporous uncemented prosthesis

Regulatory Class: II Product Code: LZO, JDI Dated: February 18, 2009 Received: February 20, 2009

Dear Ms. Kennel:

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.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such 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 Part 801); good manufacturing practice requirements as set

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Page 2 - Ms. Natalie J. Kennel

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.

This letter will allow you to begin marketing your device as described in your Section 510/k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device 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 contact the Center for Devices and Radiological Health's (CDRH's) Office of Compliance at (240) 276-0120. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometric's (OSB's) Division of Postmarket Surveillance at 240-276-3474. For questions regarding the reporting of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at 240-276-3464. 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 (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.

Sincerely yours.

Mark A. Millman

Mark N. Melkerson Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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510(k) Number (if known): K083558

Device Name: Medacta Total Hip Prosthesis System - Quadra C Femoral Stems

Indications for Use:

The Medacta Total Hip Prosthesis System - Quadra C Femoral Stems are intended for cemented use in total or partial hip arthroplasty and in primary or revision surgery.

Hip replacement is indicated in the following cases:

Severely painful and/or disabled joint as a result of arthritis, traumatic . arthritis, rheumatoid polyarthritis, or congenital hip dysplasia
Avascular necrosis of the femoral head .
Acute traumatic fracture of the femoral head or neck
Failure of previous hip surgery, joint reconstruction, internal fixation, arthrodesis, hemiarthroplasty, surface replacement arthroplasty, or total hip replacement.

Size 0 implants should not be implanted in patients with a mass of 65 kg or greater.

Prescription Use X (Part 21 CFR 801 Subpart D)

Over-The-Counter Use AND/OR (21 CFR 801 Subpart C)

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

Concurrence of CDRH, Office of Device Evaluation (ODE)

Adink M. Milken

(Division S ... Dit) Division of General, Restorative, and Neurological Devices

Page of

510(k) Number K.083558

Regulation Number and Section

§ 888.3353 Hip joint metal/ceramic/polymer semi-constrained cemented or nonporous uncemented prosthesis.

(a)
Identification. A hip joint metal/ceramic/polymer semi-constrained cemented or nonporous uncemented prosthesis is a device intended to be implanted to replace a hip joint. This device limits translation and rotation in one or more planes via the geometry of its articulating surfaces. It has no linkage across-the-joint. The two-part femoral component consists of a femoral stem made of alloys to be fixed in the intramedullary canal of the femur by impaction with or without use of bone cement. The proximal end of the femoral stem is tapered with a surface that ensures positive locking with the spherical ceramic (aluminium oxide, A12 03 ) head of the femoral component. The acetabular component is made of ultra-high molecular weight polyethylene or ultra-high molecular weight polyethylene reinforced with nonporous metal alloys, and used with or without bone cement.(b)
Classification. Class II.