COPAL® exchange G knee (polymethylmethacrylate/gentamicin) is indicated for temporary use (maximum of 180 days) as a total knee replacement (TKR) in skeletally mature patients undergoing a two-stage procedure due to a septic process. COPAL® exchange G knee is applied on the femoral condyles and on the tibial plate following removal of the existing implant and radical debridement. The device is intended for use in conjunction with systemic antimicrobial antibiotic therapy (standard treatment approach to an infection).

COPAL® exchange G knee is not intended for use for more than 180 days, at which time it must be explanted, and a permanent device implanted, or another appropriate treatment performed (e.g., resection arthroplasty, fusion, etc.). COPAL® exchange G knee is only indicated for patientswho will consistently use traditional mobility assist devices e.g. crutches, walkers, canes) throughout the implantation period.

COPAL® exchange G hip (polymethylmethacrylate / gentamicin) is indicated for temporary use (maximum of 180 days) as a total hip replacement (THR) in skeletally mature patients undergoing a two-stage procedure due to a septic process. The device is inserted into the femoral medullary canal and acetabular cavity following removal of the existing implant and radical debridement. The device is assigned to be used in conjunction with systemic antimicrobial antibiotic therapy (standard treatment approach to an infection). COPAL® exchange G hip is not intended for use for more than 180 days, at which time it must be explanted, and a permanent device implanted, or another appropriate treatment performed (e.g., resection arthroplasty, fusion, perm etc.). COPAL®exchange G hip is only indicated for patients who will consistently use traditional mobility assist devices (e.g. crutches, walkers, canes) throughout the implantation period.

Device Description

The COPAL® exchange G Hip and Knee Spacers are combination products that provide patients, undergoing a two-stage revision procedure for an infected total joint, a temporary implant to 1) allow for partial weight bearing and 2) provide an approximate natural range of motion. The devices also maintain a patient's soft tissue and joint space, preventing further complications such as muscular contraction. The gentamicin protects the device from bacterial colonization.

The COPAL® exchange G Hip and Knee Spacers are placed into the joint to maintain normal joint space and alignment. They provide patient comfort and limited mobility while the infection is being treated. The COPAL® exchange G Hip and Knee Spacers are made with bone cement that are loaded with gentamicin antibiotics. The COPAL® exchange G Hip and Knee Spacers are temporary joint prostheses designed to temporarily replace an infected implant during a total hip or knee arthroplasty and provide the patient with limited mobility and predictable, consistent local antibiotic release

COPAL® exchange G Hip Spacer is a single use device that mimics a hemi-hip prosthesis and is available in 8 sizes and usable for both left and right hips.

The COPAL® exchange G Hip Spacers are combination products made of fully formed polymethylmethacrylate (radiopaque PMMA with gentamicin). The COPAL® exchange G Hip Spacers contain an inner stainless steel (AISI 316L stainless steel) reinforcing structure. The mass used in the filling of the molds (the PMMA unformed resin) is prepared from a powder component and a liquid component. The liquid component consists of methyl methacrylate, N, N-dimethyl-p-toluidine, hydroquinone. The powder component consists of polymethymethacrylate, calcium carbonite, benzoyl peroxide, and gentamicin sulphate. The raw materials and a summary of the manufacturing process are found below.

COPAL® exchange G Knee Spacer is a single use device that is comprised of a tibia and femur component and is available in 3 sizes to form one knee spacer that is usable for left and right knee.

AI/ML Overview

The provided text describes a 510(k) premarket notification for Heraeus Medical GmbH's COPAL® exchange G Hip and Knee Spacers. The document focuses on demonstrating substantial equivalence to predicate devices, rather than establishing de novo clinical performance with specific acceptance criteria that an AI/ML device would typically face.

Due to the nature of this submission (510(k) for a physical medical device, not an AI/ML algorithm), the information required for filling out the requested table regarding acceptance criteria and performance of an "AI/ML device" is largely not applicable or not present in the document. The performance testing section refers to physical and biological tests, not AI model metrics.

However, I will extract what is available and clearly state what information is missing based on your request.

Here's an attempt to address your request based solely on the provided text, while making the critical distinction that this document does not pertain to an AI/ML device:

Acceptance Criteria and Study for COPAL® exchange G Hip and Knee Spacers (as described in K191016)

Note: The provided document describes the 510(k) clearance for physical medical devices (hip and knee spacers) and not an Artificial Intelligence/Machine Learning (AI/ML) device. Therefore, the typical acceptance criteria and study design elements requested for an AI/ML device (e.g., sensitivity, specificity, expert ground truth, MRMC studies, training/test sets) are not relevant or present in this submission. The "acceptance criteria" for this device are demonstrated through equivalence to predicate devices via various physical, chemical, and biological performance testing, not through AI/ML performance metrics.

1. Table of Acceptance Criteria and Reported Device Performance

Acceptance Criteria Category (Reinterpreted for a physical device)	Specific Criteria (from text)	Reported Device Performance (from text)
Biocompatibility	Adherence to ISO 10993-1, -3, -5, -6, -10, -11, -12 for various tests (cytotoxicity, irritation, hypersensitivity, acute/subchronic systemic toxicity, mutation assays, femoral bone implantation).	- In vitro cytotoxicity: No leachable substances dissolved in cytotoxic amounts. - Irritation: No signs of irritation; classified as not irritant. - Delayed-type hypersensitivity: No reactions identified as sensitization. - Acute systemic toxicity: No acute systemic toxic characteristics. - Reverse mutation assay: Non-mutagenic. - In vitro mammalian cell gene mutation assay: Non-mutagenic. - Femoral bone implantation/subchronic systemic toxicity: No inflammatory or degenerative findings at implantation sites. - Summary: COPAL® exchange G spacers are biocompatible according to ISO10993-2016.
Sterilization Validation	Sterility Assurance Level (SAL) of 10-6 according to ISO 11135 and AAMI TIR 28.	Chosen sterilization process (ethylene oxide gassing) is valid; sterile units achieved with defined bioburden and SAL of 10-6.
Shelf Life	Maintain sterility (DIN EN ISO 11737. Part 2), compressive strength (ISO 7206-6 and ISO 14879-1), gentamicin content, and gentamicin impurities over 36 months at 25 ± 2 °C.	All hip/knee spacers sterile throughout 36-month storage. Compressive strength within specified range. Gentamicin content and impurities remained within specified range. Summary: Stable at 25 ± 2 °C and 50% humidity for 36 months.
Sterile Barrier Integrity	Adherence to ISO 11607-1 and ISO 11607-2, including maintenance over 5 years of transport and shelf life.	Integrity of the system shown; maintenance of sterile barrier system demonstrated over 5 years.
Mechanical Performance	Compressive strength (ISO 14879-1, ISO 7206-4, ISO 7206-6), cyclic fatigue (ISO 14879-1, ISO 14242-1:2012), abrasion (ISO 14243-1:2009, ISO 14242-1:2012) demonstrating equivalence to predicate devices.	- Compressive strength: Equivalent to predicate devices. - Cyclic fatigue: Equivalent to predicate devices. - Abrasion: Equivalent to predicate devices.

2. Sample Size Used for the Test Set and Data Provenance

Due to the nature of the device (physical implant, not software/AI):

Sample Size for Test Set: This concept doesn't directly apply in the "AI/ML" sense of a data test set. The document refers to "tests performed" and "results obtained" for various physical and biological properties. Specific quantitative sample sizes for each test (e.g., number of hip spacers tested for compressive strength) are not provided in this summary.
Data Provenance: Not applicable in the context of an AI/ML algorithm (e.g., country of origin of patient data). The testing data is generated in a lab setting through physical and chemical tests on the manufactured devices. The document implies these tests were conducted by the manufacturer (Heraeus Medical GmbH, Germany).

3. Number of Experts Used to Establish Ground Truth for the Test Set and Qualifications of Experts

This is not applicable for this type of device submission. Ground truth, in the AI/ML context, refers to expert labeling of data (e.g., images). For this physical device, "ground truth" is established by adherence to recognized international standards and laboratory testing protocols performed by qualified professionals in those fields (e.g., materials science, microbiology, mechanical engineering). The specific number or qualifications of these testing personnel are not detailed in the summary.

4. Adjudication Method for the Test Set

This is not applicable for this type of device submission. Adjudication, in the AI/ML context, is typically used for resolving disagreements among multiple human annotators during ground truth establishment. For a physical device, passing/failing criteria are set by the established standards and internal quality control.

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

This is not applicable as the device is not an AI/ML algorithm intended to assist human readers.

6. If a Standalone (i.e. algorithm only without human-in-the-loop performance) was done

This is not applicable as the device is not an AI/ML algorithm.

7. The Type of Ground Truth Used

The "ground truth" for these physical devices is established by compliance with recognized international standards (e.g., ISO, ASTM) for material properties (e.g., mechanical strength, chemical composition), biological interactions (biocompatibility), and manufacturing processes (sterilization, shelf life). The "outcome data" is whether the device meets these pre-defined physical and biological performance specifications and demonstrates equivalence to the predicate device.

8. The Sample Size for the Training Set

This is not applicable as the device is not an AI/ML algorithm. There is no concept of a "training set" in this context. The product is manufactured based on design specifications and then tested for performance.

9. How the Ground Truth for the Training Set was Established

This is not applicable as the device is not an AI/ML algorithm.

In conclusion, the provided FDA 510(k) submission is for a physical medical device (hip and knee spacers) and not for an AI/ML-based device. Therefore, the requested information regarding AI/ML-specific acceptance criteria, study methodologies (e.g., human-in-the-loop, standalone, MRMC), and data sets (training, test, ground truth establishment) is largely irrelevant to this document. The document primarily focuses on demonstrating substantial equivalence through various physical, chemical, and biological performances tests against established standards and predicate devices.

Summary

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Image /page/0/Picture/0 description: The image contains the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health & Human Services logo. To the right of that is the FDA logo, which is a blue square with the letters "FDA" in white. To the right of the blue square is the text "U.S. FOOD & DRUG ADMINISTRATION" in blue.

Heraeus Medical GmbH % Mary McNamara-Cullinane Vice President of Regulatory Affairs Alira Health 1 Grant Street Framingham, Massachusetts 01702

Re: K191016

Trade/Device Name: COPAL® exchange G Hip Spacers Regulation Number: 21 CFR 888.3390 Regulation Name: Hip joint femoral (hemi-hip) metal/polymer cemented or uncemented prosthesis Regulatory Class: Class II Product Code: KWY, KWL

Trade/Device Name: COPAL® exchange G Knee Spacers Regulation Number: 21 CFR 888.3560 Regulation Name: Knee joint patellofemorotibial polymer semi-constrained cemented prosthesis Regulatory Class: Class II Product Code: JWH

Dated: October 1, 2019 Received: October 2, 2019

Dear Ms. McNamara-Cullinane:

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. 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 located 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.

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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 Part 801); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 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-device-safety/medical-device-reportingmdr-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/medicaldevices/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-device-advice-comprehensive-regulatoryassistance/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).

Sincerely,

Laurence D. Coyne, Ph.D. Acting Director DHT6C: Division of Restorative, Repair and Trauma Devices OHT6: Office of Orthopedic Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health

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Indications for Use

510(k) Number (if known): K191016

Device Name: COPAL® exchange G Hip and Knee Spacers

Indications for Use:

COPAL® exchange G Knee Spacer:

COPAL® exchange G Hip Spacer:

Prescription Use _X (Part 21 CFR 801 Subpart D)

AND/OR AND/OR AND/OR AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD AND/ORD A

Over-The-Counter Use (21 CFR 807 Subpart C)

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

Concurrence of CDRH, Office of Device Evaluation (ODE)

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510(k) Summary for the Heraeus COPAL® exchange G Hip and Knee Spacers (per 21CFR 807.92)

1. SUBMITTER/510(K) HOLDER

Heraeus Medical GmbH Philipp-Reis-Str. 8/13 61273 Wehrheim Germany

Contact Person: Ljuba Litau Telephone: + 49 (0) 6181 / 35 - 23 39 Date Prepared: October 1, 2019

2. DEVICE NAME

Proprietary Name:	COPAL® exchange G Hip and Knee Spacers
-------------------	----------------------------------------

Classification Name: Hip and Knee Spacers

Hip and Knee Spacers Common/Usual Name:

Classification Name:

· Knee joint patellofemorotibial polymer/metal/polymer semi-constrained cemented prosthesis.

· Hip joint femoral (hemi-hip) metal/polymer cemented or uncemented prosthesis.

Classification Regulation:	21 CFR 888.3560 and 21 CFR 888.3390
Product codes:	JWH, KWL and KWY

3. PREDICATE DEVICES

· Tecres Hip and Knee Spacers subject of K101356 (including its former versions K062274, K062273 and K031841)

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4. DEVICE DESCRIPTION

COPAL® exchange G Hip Spacer

COPAL® exchange G Hip Spacer is a single use device that mimics a hemi-hip prosthesis and is available in 8 sizes and usable for both left and right hips.

COPAL® exchange G Knee Spacer

COPAL® exchange G Knee Spacer is a single use device that is comprised of a tibia and femur component and is available in 3 sizes to form one knee spacer that is usable for left and right knee.

5. INTENDED USE

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COPAL® exchange G Knee Spacer:

COPAL® exchange G knee is not intended for use for more than 180 days, at which time it must be explanted, and a permanent device implanted, or another appropriate treatment performed (e.g., resection arthroplasty, fusion, etc.). COPAL® exchange G knee is only indicated for patients who will consistently use traditional mobility assist devices e.g. crutches, walkers, canes) throughout the implantation period.

COPAL® exchange G Hip Spacer:

COPAL® exchange G hip (polymethylmethacrylate / gentamicin) is indicated for temporary use (maximum of 180 days) as a total hip replacement (THR) in skeletally mature patients undergoing a two-stage procedure due to a septic process. The device is inserted into the femoral medullary canal and acetabular cavity following removal of the existing implant and radical debridement. The device is assigned to be used in conjunction with systemic antimicrobial antibiotic therapy (standard treatment approach to an infection). COPAL® exchange G hip is not intended for use for more than 180 days, at which time it must be explanted, and a permanent device implanted, or another appropriate treatment performed (e.g., resection arthroplasty, fusion, perm etc.). COPAL® exchange G hip is only indicated for patients who will consistently use traditional mobility assist devices (e.g. crutches, walkers, canes) throughout the implantation period.

6. TECHNOLOGICAL CHARACTERISTICS

The Heraeus COPAL® exchange G Spacers are substantially equivalent to the predicate device with respect to the following:

The intended use is equivalent in that they are both indicated for temporary use (maximum of 180 days) as a total hip replacement (THR) or total knee replacement (TKR) for skeletally mature patients undergoing a two-stage procedure due to a septic process. The proposed and predicate devices are intended for use in conjunction with systemic antimicrobial antibiotic therapy (standard treatment approach to an infection).

The technological characteristics of the Heraeus COPAL® exchange G Spacers and the predicate product are identical in that they are all designed to mimic a permanent

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implant that include an antibiotic for use in infected joints for a period of up to 180 days. The configurations consist of hip and knee components that mimic the intended anatomical space. The proposed Heraeus COPAL® exchange G Spacers and the predicate devices both contain an antibiotic component that helps to facilitate the healing process. The dressings are PMMA products which provide position and structure to the anatomical area. There are no major differences between the proposed and the predicate devices and are essentially identical in materials and design.

The operational characteristics of the Heraeus COPAL® exchange G Spacers are equivalent to the predicate device. Both Spacers provide patients, undergoing a twostage revision procedure for an infected total joint, a temporary implant to: 1) allow for partial weight bearing and 2) provide an approximate natural range of motion. The devices also maintain a patient's soft tissue and joint space, preventing further complications such as muscular contraction. The gentamicin protects the device from bacterial colonization.

The Heraeus COPAL® exchange G Spacers and the predicate devices are placed into the joint to maintain normal joint space and alignment. They provide patient comfort and limited mobility while the infection is being treated. The COPAL® and predicate Spacers are made with bone cement and the Tecres spacers are loaded with gentamicin antibiotics.

The technological characteristics of the proposed Heraeus COPAL® exchange G Spacers are equivalent to the predicate device: the Hip Spacers are comprised of PMMA, gentamicin and a stainless-steel inlay and the Knee Spacers are comprised of PMMA and gentamicin. The design and operational characteristics are equivalent for the proposed and predicate devices in that they mimic the permanent implants and are intended to be used as temporary implants in conjunction with systemic antibiotic therapy. The proposed and predicate devices are provided in a range of sizes that are compatible with skeletally mature adults. All of these technological characteristics are equal fit, form and function resulting in the Heraeus COPAL® exchange G Spacers being substantially equivalent to the Tecres Hip and Knee Spacers.

7. PERFORMANCE TESTING

Testing was conducted according to the FDA recognized standards in order to demonstrate equivalence to the predicate devices. These tests include:

Biocompatibility testing is performed in accordance with the FDA Guidance, "Use of International Standard ISO 10993-1, "Biological evaluation of medical devices - Part 1.

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The following testing was conducted according to the FDA recognized standards in order to demonstrate equivalence to the predicate devices:

. Biocompatibility testing was performed in accordance with the FDA Guidance, "Use of International Standard ISO 10993-1-2016, "Biological evaluation of medical devices - Part 1: Evaluation and testing within a risk management process"" including cytotoxicity, irritation, hypersensitivity, acute and subchronic systemic toxicity and mutation assays.
- O The in vitro cytotoxicity was performed according to ISO 10993-5-2009. No leachable substances were dissolved in cytotoxic amounts under the test conditions.
- An irritation test according to ISO 10993-10, -1, -12 (Intracutaneous Reactivity) was O carried out. Under the conditions of the test the polar as well as the nonpolar extracts of the test item caused no signs of irritation. The test item is classified as not irritant.
- A test for delayed-type hypersensitivity (Guinea Pig Maximization Test) was carried out о according ISO10993- 10, -1, -12. Under the conditions of the test, no reactions were identified as sensitization.
- A test of acute systemic toxicity was performed according to the guidelines ISO 10993-11, O -1, -12 and ASTM F750-87 (reapproved 2012). Under the conditions of the study, it can be stated that the test item showed no acute systemic toxic characteristics.
- A reverse mutation assay was carried out according ISO10993-3, -1, -12. The results are O considered to be non-mutagenic.
- An in vitro mammalian cell gene mutation assay was carried out according to ISO10993- O 3 -1, -12. Under the conditions of the assay, the extracts of the test item are considered to be non-mutagenic.
- A femoral bone implantation study combined with an assessment of subchronic systemic о toxicity were carried out according to ISO10993- 6, 11, -1, -12. At the implantation sites, there were no inflammatory or degenerative findings encountered.
- In summary, it can be stated that the COPAL® exchange G spacers are biocompatible O according to ISO10993-2016. The proposed COPAL® exchange G spacers and the predicate devices were both tested for biocompatibility according to ISO10993.
Sterilization Validation was performed in accordance to ISO 11135 and AAMI TIR 28. The ● sterilization was carried out by gassing with ethylene oxide. The sterilization cycle is designed to deliver sterile units, starting with a defined bioburden and ending with a sterility assurance level (SAL) of 10-6.

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Based on the tests performed and the results obtained, the chosen sterilization process can be considered as valid.

The shelf life of the COPAL® exchange G spacers was tested at 25 ± 2 °C over a period of 36 ● months. The test times were 0 months, 6 months, 9 months, 12 months, 24 months and 36 months. The sterility according to DIN EN ISO 11737. Part 2, the compressive strength according to ISO 7206-6 and ISO 14879-1, the gentamicin content and the content of gentamicin impurities were tested with an HPLC analysis method. All examined hip spacers and knee spacers were sterile throughout the storage period. The compressive strength of the hip spacers and knee spacers was within the specified range. The gentamicin content and gentamicin impurities remained within the specified range over the entire storage period. In summary, the COPAL® exchange G spacers were stable at a temperature of 25 ± 2 ° and a humidity of 50 % for a period of 36 months.
Validation of the sterile barrier were performed according to ISO 11607-1 and ISO 11607-2 to ● show the integrity of the system. In addition, the maintenance of the sterile barrier system through transport and shelf life over 5 years was investigated.
Mechanical tests were conducted in order to demonstrate that the Heraeus COPAL® exchange ● G Spacers function as intended and are safe and effective for their intended use.
- The compressive strength of the COPAL® exchange G spacers were tested in accordance O with ISO 14879-1, ISO 7206-4 and ISO 7206-6. The results show that COPAL® exchange G spacers are equivalent to the predicate devices.
- The cyclic fatigue tests were performed according to ISO 14879-1 and ISO 14242-1:2012. O Regarding the cyclic fatigue, the COPAL® exchange G spacers are equivalent compared to the predicate devices.
- Abrasion tests were performed according to ISO 14243-1:2009 and ISO 14242-1:2012. O The results show that COPAL® exchange G spacers are equivalent to the predicate devices.

In summary, the verification and validation testing performed demonstrate that the Heraeus COPAL® exchange G Spacers function as intended and is safe and effective for their intended use and where appropriate were tested and found to be substantially equivalent to the predicate devices.

8. CONCLUSION OF SUBSTANTIAL EQUIVALENCE

The Heraeus COPAL® exchange G Spacers have been shown to be substantially equivalent to the predicate devices. Substantial equivalence has been demonstrated through a comparison of intended use, design and technological characteristics, as well as performance testing. The information provided within this premarket notification supports

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substantial equivalence of the subject device to the predicate devices. and demonstrates them to be essentially identical.

Regulation Number and Section

§ 888.3390 Hip joint femoral (hemi-hip) metal/polymer cemented or uncemented prosthesis.

(a)
Identification. A hip joint femoral (hemi-hip) metal/polymer cemented or uncemented prosthesis is a two-part device intended to be implanted to replace the head and neck of the femur. This generic type of device includes prostheses that have a femoral component made of alloys, such as cobalt-chromium-molybdenum, and a snap-fit acetabular component made of an alloy, such as cobalt-chromium-molybdenum, and ultra-high molecular weight polyethylene. This generic type of device may be fixed to the bone with bone cement (§ 888.3027) or implanted by impaction.(b)
Classification. Class II.