The Metha® Short Stem Hip System (uncemented, press-fit fixation) is intended to replace a hip joint. The device is intended for: - skeletally mature individuals undergoing primary surgery for total hip replacement . - patients suffering from severe hip pain and disability due to rheumatoid arthritis, . osteoarthritis, traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral head and nonunion of previous fractures of the femur. - patients with congenital hip dysplasia, protrusion acetabuli, or slipped capital femoral epiphysis - patients suffering from disability due to previous fusion - patients with acute femoral neck fractures .

Device Description

Metha® is a femoral short stem intended to replace the hip joint in total hip arthroplasty. The femoral stem is collarless, conical shaped and is intended for cementless, press-fit application. The femoral stem is manufactured from titanium alloy and is available in various sizes. The proximal area of the femoral stem is plasma sprayed (Plasmapore®) with a secondary coating of Calcium Phosphate(u-CaP®). It is designed for use with currently available Aescular Implant Systems femoral heads, acetabular components and Bipolar cups.

AI/ML Overview

This is a 510(k) premarket notification for a medical device (hip implant), which typically relies on demonstrating substantial equivalence to a predicate device rather than presenting a study with acceptance criteria in the way an AI/software device would. Therefore, most of the requested fields are not applicable or cannot be extracted from the provided text.

Here is what can be inferred and stated based on the given information:

1. Table of Acceptance Criteria and Reported Device Performance

Acceptance Criteria (Not Explicitly Stated in a Quantitative Form)	Reported Device Performance
Substantial equivalence to predicate devices based on technological characteristics and performance testing.	Performed a range of required tests as per FDA guidance documents for orthopedic devices and specific guidelines for metallic surfaces, plasma-sprayed coatings, modular implant components, femoral stem prostheses, and calcium phosphate coatings. The device materials and range of shapes/sizes are similar to predicate devices.

Explanation: The concept of "acceptance criteria" for a 510(k) clearance of a mechanical implant like this is not about meeting specific numerical performance targets in a clinical study with a predefined sample size and ground truth, as it would be for a diagnostic AI. Instead, it's about demonstrating that the new device is as safe and effective as a legally marketed predicate device. This is achieved through engineering performance testing (e.g., mechanical, material, biocompatibility) and comparison of technological characteristics. The document states that "All required testing per 'Draft Guidance for the Preparation of Premarket Notifications (510(k)s) Applications for Orthopedic Devices-The Basic Elements' were done where applicable," along with several other specific guidance documents. This implies that the device successfully met the benchmarks or standards outlined in those guidances.

2. Sample size used for the test set and the data provenance
Not applicable. The clearance is based on mechanical and material testing, not a clinical test set with human data that would have provenance.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts
Not applicable. Ground truth as typically understood for AI/diagnostic studies is not relevant here.

4. Adjudication method for the test set
Not applicable.

5. 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 implant, not an AI/diagnostic tool.

6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done
Not applicable. This is a medical implant, not an AI/diagnostic algorithm.

7. The type of ground truth used (expert consensus, pathology, outcomes data, etc.)
Not applicable in the context of clinical "ground truth" for diagnostic performance. For mechanical implants, the "ground truth" for safety and effectiveness is established through adherence to national/international standards and FDA guidance documents for material properties, mechanical integrity, and biocompatibility, as well as comparison to predicate devices.

8. The sample size for the training set
Not applicable. This is a medical implant, not an AI/machine learning model.

9. How the ground truth for the training set was established
Not applicable.

Summary

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K080584

B. 510(k) SUMMARY (as required by 21 CFR 807.92)

Metha® Short Stem Hip System February 29, 2008

COMPANY: Aesculap Implant Systems, Inc. 3773 Corporate Parkway Center Valley, PA 18034 Establishment Registration Number: 3005673311
CONTACT: Kathy A. Racosky 610-984-9291 (phone) 610-791-6882 (fax)
TRADE NAME: Metha®
COMMON NAME: Metha® Short Stem Hip System
CLASSIFICATION NAME: Prosthesis, Hip, Semi-Constrained, Metal/Polymer, Uncemented Prosthesis, Hip, Semi-Constrained, Uncemented, Metal/Polymer, Non-Porous, Calcium-Phosphate Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Polymer, Cemented or Non-Porous, Uncemented Prosthesis, Hip, Hemi-, Femoral, Metal/Polymer, Cemented or Uncemented 888.3360, 888.3353, 888.3353, 888.3390 REGULATION NUMBER:

PRODUCT CODE: LWJ, MEH, LZO, KWY

SUBSTANTIAL EQUIVALENCE

Aesculap Implant Systems, Inc. believes that the Metha® Short Stem Hip System is substantially equivalent to:

Excia Total Hip System (K042344) .
Excia Total Hip System with u-CaP® (K060437) .
Excia Total Hip System 12/14 Trunnion with Ceramic Head (K060918) ●
. MAYO® Conservative Hip Prosthesis (K030733)

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DEVICE DESCRIPTION

INDICATIONS FOR USE

The Metha® Short Stem Hip System (uncemented, press-fit fixation) is intended to replace a hip joint.

The device is intended for:

skeletally mature individuals undergoing primary surgery for total hip . replacement
. patients suffering from severe hip pain and disability due to rheumatoid arthritis, osteoarthritis, traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral head and nonunion of previous fractures of the femur.
patients with congenital hip dysplasia, protrusion acetabuli, or slipped . capital femoral epiphysis
patients suffering from disability due to previous fusion .
patients with acute femoral neck fractures �

TECHNOLIGICAL CHARACTERISTICS(compared to Predicate(s))

The components of the Aesculap Implant Systems Metha® Short Stem Hip System are offered in a similar range of shapes and sizes as the predicate devices. The material used for the Aesculap Implant Systems device is the same as that used to manufacture the predicate devices.

PERFORMANCE DATA

All required testing per "Draft Guidance for the Preparation of Premarket Notifications (510(k)s) Applications for Orthopedic Devices-The Basic Elements" were done where applicable. In addition, testing per the;

"Guidance Document for Testing Orthopedic Implants with Modified . Metallic Surfaces Apposing Bone or Bone Cement",
"Guidance for Industry on the Testing of Metallic Plasma Sprayed . Coatings on Orthopedic Implants to Support Reconsideration of Postmarket Surveillance Requirements",
"Guidance Document for Testing Non-articulating, "Mechanically Locked" . Modular Implant Components",
"Draft Guidance for Femoral Stem Prostheses", .
"Draft Guidance for Calcium Phosphate (Ca-P) Coating" was completed . where applicable.

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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" arranged around the perimeter. Inside the circle is a stylized image of an eagle or other bird-like figure, with its wings spread and head turned to the side.

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

Aesculap Implant Systems, Inc. c/o Ms. Kathy A. Racosky Regulatory Affairs Specialist 3773 Corporate Parkway Center Valley, PA 18034

Re: K080584 Trade/Device Name: Metha Short Stem Hip Regulation Number: 21 CFR 888.3353 Regulation Name: Hip joint metal/ceramic/polymer semi-constrained cemented or uncemented prosthesis Regulatory Class: Class II Product Code: MEH, LZO, LWJ, KWY Dated: April 24, 2008 Received: April 25, 2008

MAY - 9 2008

Dear Ms. Racosky:

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 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.

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Page 2 - Ms. Kathy A. Racosky

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 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 toll-free number (800) 638-2041 or (240) 276-3150 or the Internet address http://www.fda.gov/cdrh/industry/support/index.html.

Sincerely yours,

Mark N. Wilkinson

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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A. INDICATIONS FOR USE STATEMENT

510(k) Number: K080584

Device Name: Metha® Short Stem Hip System

Indications for Use:

The Metha® Short Stem Hip System (uncemented, press-fit fixation) is intended to replace a hip joint.

The device is intended for:

skeletally mature individuals undergoing primary surgery for total hip replacement .
patients suffering from severe hip pain and disability due to rheumatoid arthritis, . osteoarthritis, traumatic arthritis, polyarthritis, collagen disorders, avascular necrosis of the femoral head and nonunion of previous fractures of the femur.
patients with congenital hip dysplasia, protrusion acetabuli, or slipped capital � femoral epiphysis
patients suffering from disability due to previous fusion
patients with acute femoral neck fractures .

Prescription Use X ______ and/or Over-the-Counter Use

(per 21 CFR 801.109)

(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED) Concurrence of CDRH, Office of Device Evaluation (ODE)

(Division Sign-Off) Nille Dyn formen Division of General, Restorative, and Neurological Devices

510(k) Number K080584

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.