GMK knee prosthesis is designed for cemented use in total knee arthroplasty, if there is evidence of sufficient sound bone to seat and support the components.

This knee replacement system is indicated in the following cases:

Severely painful and/or disabled joint as a result of arthritis, traumatoid arthritis, rheumatoid arthritis.
Avascular necrosis of femoral condyle.
· Post traumatic loss of joint configuration.
· Primary implantation failure.

GMK Sphere can be implanted using a kinematic alignment approach. When a kinematic alignment approach is utilized, this knee replacement system is indicated in the following cases:

· Severely painful and/or disabled joint as a result of arthritis, traumatoid arthritis or polyarthritis.
· Collagen disorders, and/or avascular necrosis of the femoral condyle.
· Moderate valgus, varus, or flexion deformities.

Tibial wedges cemented are to be attached to the tibial baseplate with both the fixing cylinders and bone cement. The screwed tibial augments are for screwed fixation to the tibial baseplate.

In case a semi-constrained liner is used, an extension stem must be implanted both on the femoral components. In case a GMK Revision tibial tray is used, an extension stem must be implanted.

Device Description

The GMK Sphere Flex insert E-CROSS (Vitamin E Highly Crosslinked UHMWPE) , GMK Sphere CR E-CROSS (Vitamin E Highly Crosslinked UHMWPE) inserts and the Resurfacing Patella (Vitamin E Highly Crosslinked UHMWPE) are a line extension to the GMK Sphere Total Knee System and are:

o Tibial insert Fixed Sphere FLEX: Left and Right, Sizes 1-6, Thicknesses 10-11-12-13-14-17-20 mm, E-cross-Vitamin-E Highly Crosslinked UHMWPE;
Tibial Insert Fixed SPHERE CR: Left and Right, Sizes 1-6, Thicknesses 10-11-12-13-● 14mm, E-cross-Vitamin-E Highly Crosslinked UHMWPE;
Patella resurfacing E-Cross: Sizes 1-4 E-Cross Vitamin-E Highly Crosslinked ● UHMWPE

GMK Sphere implants are sterile implantable devices designed for tricompartmental replacement of the natural knee joint.

They are a line extension to Medacta previously cleared implants: GMK Sphere (K121416), GMK Sphere Extension, (K140826), GMK Knee Prosthesis- GMK Sphere Tibial Insert Flex (K162035), GMK Sphere CR Tibial Inserts (K181635) and GMK Total Knee System (K0909889) and GMK Resurfacing Patella Size 4 (K113571).

Liners and Resurfacing patella subject of this submission are implants made of E-Cross (Vitamin-E Highly Crosslinked UHMWPE).

The introduction of the subject items do not require additional instrumentation needed during the surgical procedure and do not alter the indented use or outcomes.

AI/ML Overview

The provided text describes a 510(k) premarket notification for a medical device, which focuses on demonstrating substantial equivalence to predicate devices rather than proving the device meets specific acceptance criteria through a standalone study with clinical outcomes. Therefore, much of the requested information (such as sample sizes for test sets, data provenance, number of experts for ground truth, adjudication methods, MRMC studies, and detailed ground truth establishment for training sets) is not applicable or not provided in this type of submission.

The "acceptance criteria" here primarily refer to the documented performance standards that the device must meet to demonstrate its safety and effectiveness, usually through non-clinical (mechanical) testing, in comparison to the predicate device.

Here's the information that can be extracted and inferred from the document:

1. Table of Acceptance Criteria and Reported Device Performance

The document lists several performance tests conducted. The acceptance criteria for these tests are generally that the new device performs equivalently to or better than the predicate devices, or within established limits for such devices, as per relevant standards. Specific numerical acceptance criteria or detailed reported performance values are not explicitly given in this summary document, but the conclusion states that the tests demonstrated safety and effectiveness.

Test Performed	Acceptance Criteria (Inferred)	Reported Device Performance (Inferred)
GMK® SPHERE TIBIAL INSERTS MADE OF E-CROSS (VITAMIN E HIGHLY CROSSLINKED UHMWPE)
Constraint A/P Draw Test	Performance equivalent to predicate devices or within established limits for knee inserts.	Tests demonstrated that the new E-Cross inserts are as safe and effective as the predicate devices. (Per Report A.1)
M/L Shear Test	Performance equivalent to predicate devices or within established limits for knee inserts.	Tests demonstrated that the new E-Cross inserts are as safe and effective as the predicate devices. (Per Report A.1)
Rotary Laxity Test	Performance equivalent to predicate devices or within established limits for knee inserts.	Tests demonstrated that the new E-Cross inserts are as safe and effective as the predicate devices. (Per Report A.1)
Wear Test in Knee Simulator Machine with Load Control	Wear characteristics equivalent to or better than predicate devices, adhering to relevant standards (e.g., ISO 14243).	Tests demonstrated that the new E-Cross inserts are as safe and effective as the predicate devices. (Per Report A.2)
Maximum Postero-Anterior Load that can occur on the Tibial Insert During Activities of Daily Living	Ability to withstand typical physiological loads without failure, equivalent to predicate devices.	Tests demonstrated that the new E-Cross inserts are as safe and effective as the predicate devices. (Per Report A.3)
Dynamic Endurance Test Under PA Load	Endurance life equivalent to or exceeding predicate devices, meeting relevant fatigue standards.	Tests demonstrated that the new E-Cross inserts are as safe and effective as the predicate devices. (Per Report A.4)
GMK-SPHERE RESURFACING PATELLA MADE OF E-CROSS (VITAMIN E HIGHLY CROSSLINKED UHMWPE)
Contact Pressure and Areas	Contact mechanics (pressure and area) comparable to predicate patella components to ensure proper load distribution and minimize wear.	Tests demonstrated that the new E-Cross Resurfacing Patella is as safe and effective as the predicate devices. (Per Report A.5)
GMK®-SPHERE E-CROSS TIBIAL INSERTS
Contact Pressure and Areas: Comparative Analysis Between E-CROSS and UHMWPE Devices	Contact mechanics (pressure and area) comparable or improved compared to non-E-CROSS (traditional UHMWPE) versions to ensure proper load distribution and minimize wear.	Comparative analysis performed; results support the new E-Cross inserts are as safe and effective as the predicate devices. (Per Report A.6)
MATERIAL CHARACTERIZATION OF MEDACTA'S VITAMIN E HIGHLY CROSSLINKED UHMWPE (E-CROSS)	Material properties (e.g., mechanical strength, oxidation resistance, crosslinking density) meet established specifications for medical-grade UHMWPE and are suitable for the intended use, and are comparable to or improved over predicate materials.	Material characterization was performed; results support the new E-Cross inserts and Patella are as safe and effective as the predicate devices.
PYROGENICITY (Bacterial Endotoxin Test (LAL test) and Pyrogen test according to USP chapter <151>)	Absence of pyrogens as per European Pharmacopoeia §2.6.14 (equivalent to USP chapter <85>) and USP chapter <151>.	Tests showed compliance with pyrogenicity standards (LAL test and USP <151>). The devices are not labeled as non-pyrogenic or pyrogen-free. (Reported as compliant with standards in section VII)

2. Sample size used for the test set and the data provenance

Sample Size for Test Set: Not specified in the summary document. These are typically mechanical, benchtop tests, not clinical trials with patient populations.
Data Provenance: The tests are "Non-Clinical Studies" and "Performance Data" conducted by Medacta International SA. The exact location of the testing laboratories (country) is not specified, but the company is based in Switzerland. The studies are prospective in the sense that they were designed and executed to support this submission.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts

Not Applicable. For non-clinical, mechanical testing of medical devices, "ground truth" as established by medical experts (e.g., radiologists) is not relevant. The "ground truth" is defined by established engineering and material science standards and physical measurements.

4. Adjudication method for the test set

Not Applicable. Adjudication methods like 2+1 or 3+1 are used in clinical studies or image interpretation studies where expert consensus is needed to define a definitive diagnosis or outcome. For mechanical engineering tests, results are based on objective measurements and adherence to specified test protocols and standards.

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 submission is for a knee implant component (tibial inserts and patella), not an AI-powered diagnostic or interpretive device. Therefore, MRMC studies are not relevant.

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

Not Applicable. This is a physical medical implant, not a software algorithm.

7. The type of ground truth used

Defined by Mechanical Engineering Standards and Specifications: The "ground truth" for these tests is based on objective physical properties, mechanical performance criteria, and material characterization standards (e.g., ISO, USP, European Pharmacopoeia). These standards specify the acceptable ranges or thresholds for device performance.

8. The sample size for the training set

Not Applicable/Not Provided. The concept of a "training set" is relevant for AI/machine learning models. For mechanical device testing, there isn't a "training set" in the same sense. Design and material selection for the device would have involved extensive R&D and prior testing, but this isn't framed as a "training set" within this regulatory context.

9. How the ground truth for the training set was established

Not Applicable/Not Provided. As there is no "training set" in the AI sense, this question is not applicable. The design and material choices are based on established engineering principles and prior research in UHMWPE and knee arthroplasty.

Summary

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September 18, 2020

Image /page/0/Picture/1 description: The image shows the logo of the U.S. Food and Drug Administration (FDA). The logo consists of two parts: the Department of Health & Human Services logo on the left and the FDA logo on the right. The FDA logo includes the letters "FDA" in a blue square, followed by the words "U.S. FOOD & DRUG" in blue, and "ADMINISTRATION" in a smaller font size below.

Medacta International SA % Chris Lussier Director, Quality and Regulatory Medacta USA 3973 Delp Street Memphis, Tennessee 38118

Re: K202022

Trade/Device Name: GMK-SPHERE Tibial inserts FLEX Tibial Insert CR and Resurfacing Patella made of E-CROSS (Vitamin E Highly Crosslinked UHMWPE) Regulation Number: 21 CFR 888.3560 Regulation Name: Knee Joint Patellofemorotibial Polymer Semi-Constrained Cemented Prosthesis Regulatory Class: Class II Product Code: JWH Dated: July 21, 2020 Received: July 22, 2020

Dear Chris Lussier:

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.

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.

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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 (OS) 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,

for Ting Song, Ph.D., R.A.C. Assistant Director DHT6A: Division of Joint Arthroplasty Devices OHT6: Office of Orthopedic Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health

Enclosure

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Indications for Use

510(k) Number (if known) K202022

Device Name

GMK-SPHERE Tibial inserts FLEX Tibial Insert CR and Resurfacing Patella made of E-CROSS (Vitamin E Highly Crosslinked UHMWPE)

Indications for Use (Describe)

GMK knee prosthesis is designed for cemented use in total knee arthroplasty, if there is evidence of sufficient sound bone to seat and support the components.

This knee replacement system is indicated in the following cases:

Severely painful and/or disabled joint as a result of arthritis, traumatoid arthritis, rheumatoid arthritis.
Avascular necrosis of femoral condyle.
· Post traumatic loss of joint configuration.
· Primary implantation failure.

GMK Sphere can be implanted using a kinematic alignment approach. When a kinematic alignment approach is utilized, this knee replacement system is indicated in the following cases:

· Severely painful and/or disabled joint as a result of arthritis, traumatoid arthritis or polyarthritis.
· Collagen disorders, and/or avascular necrosis of the femoral condyle.
· Moderate valgus, varus, or flexion deformities.

Tibial wedges cemented are to be attached to the tibial baseplate with both the fixing cylinders and bone cement. The screwed tibial augments are for screwed fixation to the tibial baseplate.

In case a semi-constrained liner is used, an extension stem must be implanted both on the femoral components. In case a GMK Revision tibial tray is used, an extension stem must be implanted.

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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Traditional 510(k)

K202022 page 1 of 7

Medacta International SA

3.0 510(k) Summary

I. Submitter

Medacta International SA Strada Regina 6874 Castel San Pietro (CH) Switzerland Phone (+41) 91 696 60 60 Fax (+41) 91 696 60 66

Contact Person: Stefano Baj, Regulatory and Compliance Director, Medacta International SA Applicant Correspondent: Chris Lussier, Director of Quality and Regulatory, Medacta USA Date Prepared: July 20, 2020

II. Device

Device Proprietary Name:	GMK-SPHERE Tibial inserts FLEX Tibial Insert CR andResurfacing Patella made of E-CROSS (Vitamin E HighlyCrosslinked UHMWPE)
Common or Usual Name:	Tibial Inserts and Resurfacing Patella
Classification Name:	Knee joint patellofemorotibial polymer/metal/polymersemiconstrained cemented prosthesis.
Primary Product Code:	JWH
Regulation Number:	21 CFR 888.3560
Device Classification	II

Predicate Device III.

Substantial equivalence is claimed to the following device:

Medacta International SA, GMK Sphere K121416
Medacta International SA. GMK Sphere Extension, K140826
Medacta International SA, GMK Knee Prosthesis- GMK Sphere Tibial Insert Flex, K162035
Medacta International SA, GMK Sphere CR Tibial Inserts, K181635
o Medacta International SA, GMK Total Knee System, K090988
Medacta International SA, GMK Resurfacing Patella Size 4, K113571

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K202022 page 2 of 7 Traditional 510(k)

Medacta International SA

Reference predicate:

Zimmer-Biomet, Vivacit-E Vitamin E Highly Crosslinked Polyethylene Liners, K120370 ●

Device Description IV.

o Tibial insert Fixed Sphere FLEX: Left and Right, Sizes 1-6, Thicknesses 10-11-12-13-14-17-20 mm, E-cross-Vitamin-E Highly Crosslinked UHMWPE;
Tibial Insert Fixed SPHERE CR: Left and Right, Sizes 1-6, Thicknesses 10-11-12-13-● 14mm, E-cross-Vitamin-E Highly Crosslinked UHMWPE;
Patella resurfacing E-Cross: Sizes 1-4 E-Cross Vitamin-E Highly Crosslinked ● UHMWPE

GMK Sphere implants are sterile implantable devices designed for tricompartmental replacement of the natural knee joint.

Liners and Resurfacing patella subject of this submission are implants made of E-Cross (Vitamin-E Highly Crosslinked UHMWPE).

The introduction of the subject items do not require additional instrumentation needed during the surgical procedure and do not alter the indented use or outcomes.

The following components of the GMK Sphere have been cleared previously under K121416 and K140826 predicate device:

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Traditional 510(k)

K202022 page 3 of 7

Medacta International SA

. Femoral Component Left and Right, Sizes 1-7 Co-Cr-Mo (ISO 5832-4 Third Edition 2014-09-15 Implants for Surgery - Metallic Materials - Part 4: Cobalt-Chromium-Molybdenum Casting Alloy);
Femoral Component Left and Right. Sizes 1+ to 6+ (intermediate sizes) Co-Cr-Mo (ISO . 5832-4 Third Edition 2014-09-15 Implants for Surgery - Metallic Materials - Part 4: Cobalt-Chromium-Molybdenum Casting Alloy);
Tibial tray fixed cemented Left and Right, 4 intermediate sizes Co-Cr-Mo (ISO 5832-4 . Third Edition 2014-09-15 Implants for Surgery - Metallic Materials - Part 4: Cobalt-Chromium-Molybdenum Casting Alloy);
0 Tibial Insert Fixed Flex, Left and Right, Sizes 1-6. 10mm -20mm UHMWPE (ISO 5834 2:2011 Implants for Surgery - Ultra-High-Molecular-Weight Polyethylene - Part 2: Moulded Forms) Type 1, Ti6Al5V (ISO 5832-3:1996 Implants for Surgery - Metallic Materials - Part 3 : Wrought Titanium 6-Aluminium 4-Vanadium Alloy);
o Tibial Insert Fixed Flex. Left and Right, Sizes 1-6. 11mm and 13mm UHMWPE (ISO 5834-2:2011 Implants for Surgery - Ultra-High-Molecular-Weight Polyethylene - Part 2: Moulded Forms) Type 1. Ti6Al4V (ISO 5832-3:1996 Implants for Surgery - Metallic Materials – Part 3: Wrought Titanium 6-Aluminium 4-Vanadium Alloy; and
Instrumentation. .

The following components of the GMK Sphere have been cleared previously under the Medacta GMK Total Knee System:

Resurfacing patella Sizes 1-4 (K090988 and K113571); o
Tibial tray fixed cemented Left and Right, Sizes 1-6 (K090988); and ●
Primary extension stem Ø 11mm/ L 65mm (K090988) and L 30mm (K133630). o

In detail, the liners and the resurfacing patella subject of the current submission are compatible with the all the GMK Sphere tibial baseplates and femurs previously cleared.

V. Indications for Use

GMK knee prosthesis is designed for cemented use in total knee arthroplasty, if there is evidence of sufficient sound bone to seat and support the components.

This knee replacement system is indicated in the following cases:

· Severely painful and/or disabled joint as a result of arthritis, traumatic arthritis, rheumatoid arthritis or polyarthritis.

· Avascular necrosis of femoral condyle.
· Post traumatic loss of joint configuration.
· Primary implantation failure.

GMK Sphere can be implanted using a kinematic alignment approach. When a kinematic alignment approach is utilized, this knee replacement system is indicated in the following cases:

{6}------------------------------------------------

Traditional 510(k)

K202022 page 4 of 7

Medacta International SA

· Severely painful and/or disabled joint as a result of arthritis, traumatic arthritis, rheumatoid arthritis or polyarthritis.

· Collagen disorders, and/or avascular necrosis of the femoral condyle.
· Moderate valgus, varus, or flexion deformities.

Tibial wedges cemented are to be attached to the tibial baseplate with both the fixing cylinders and bone cement.

The screwed tibial augments are for screwed fixation to the tibial baseplate.

In case a semi-constrained liner is used, an extension stem must be implanted both on the tibial and on the femoral components. In case a GMK Revision tibial tray is used, an extension stem must be implanted.

VI. Comparison of Technological Characteristics

Tibial insert O
o Tibial insert Fixed Sphere FLEX E-CROSS (Vitamin E Highly Crosslinked UHMWPE) implants and the Medacta predicate devices GMK SPHERE (K121416, K140826, K162035 and K181635) share the following characteristics:
- Indications for Use: ●
- Sizes: ●
- Packaging, ●
- Device Usage;
- Biocompatibility
- Shelf Life; and
- Sterilization Method.

Tibial insert Fixed Sphere FLEX E-CROSS (Vitamin E Highly Crosslinked UHMWPE) implants are technologically different from the predicate device as follows:

Materials ●
Design
Tibial Insert Fixed SPHERE CR E-CROSS (Vitamin E Highly Crosslinked UHMWPE) ● implants and the predicate devices GMK SPHERE (K121416, K140826, K162035 and K181635) share the following characteristics:
- Indications for Use; 0
- 0 Sizes;
- Packaging ●
- Device Usage: ●
- Biocompatibility; ●

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Traditional 510(k)

K202022 page 5 of 7

Medacta International SA

Shelf Life; and
Sterilization Method. ●

Tibial insert Fixed SPHERE CR E-CROSS (Vitamin E Highly Crosslinked UHMWPE)implants are technologically different from the predicate device as follows:

Materials ●
Patella Resurfacing E-CROSS (Vitamin E Highly Crosslinked UHMWPE) implants and O the predicate devices GMK SPHERE (K090988, K113571, K121416, K140826, K162035 and K181635) share the following characteristics:
- Design;
- Sizes: ●
- Device usage: ●
- Biocompatibility: ●
- Sterility; ●
- Shelf life; ●
- Packaging: .

Patella Resurfacing E-CROSS (Vitamin E Highly Crosslinked UHMWPE)implants are technologically different from the predicate device as follows:

Materials

Performance Data VII.

A review of the mechanical data on the subject and predicate devices indicates that the subject devices are equivalent to devices currently cleared for use and do not alter the intended surgical outcomes. The purpose of this submission is to introduce new GMK Sphere inserts and Resurfacing patella made of Vitamin E Highly Crosslinked UHMWPE. The introduction of the subject items do not require additional instrumentation needed during the surgical procedure. The new inserts and resurfacing patella design introduction was evaluated bv risk analysis to identify any new risks associated. Based on the risk analysis, additional tests have been performed in order to demonstrate that the new E-Cross inserts and new E-Cross Resurfacing patella are as safe as effective as the predicate devices.

Testing was conducted according to written protocols with acceptance criteria that were based on standards. The following mechanical studies were performed in support of a substantial equivalence determination:

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Traditional 510(k)

K202022 page 6 of 7

Medacta International SA

Non-Clinical Studies:

PERFORMANCE TESTING O
- "GMK® SPHERE TIBIAL INSERTS MADE OF E-CROSS (VITAMIN E HIGHLY ● CROSSLINKED UHMWPE): CONSTRAINT A/P DRAW TEST - M/L SHEAR TEST - ROTARY LAXITY TEST, Test Report A.1
- GMK®-SPHERE TIBIAL INSERTS E-CROSS (VITAMIN E HIGHLY ● CROSSLINKED UHMWPE): WEAR TEST IN KNEE SIMULATOR MACHINE WITH LOAD CONTROL, test Report A.2
- GMK® SPHERE TIBIAL INSERT FLEX MADE OF E-CROSS (VITAMIN ● EHIGHLY CROSSLINKED UHMWPE): MAXIMUM POSTERO-ANTERIOR LOAD THAT CAN OCCUR ON THE TIBIAL INSERT DURING ACTIVITIES OF DAILY LIVING, Test Report A.3
- GMK® SPHERE TIBIAL INSERT FLEX MADE OF ● E-CROSS (VITAMIN EHIGHLY CROSSLINKED UHMWPE): DYNAMIC ENDURANCE TEST UNDER PA LOAD, Test Report A.4
- GMK-SPHERE RESURFACING PATELLA MADE OF E-CROSS (VITAMIN E ● HIGHLY CROSSLINKED UHMWPE): CONTACT PRESSURE AND AREAS, Test Report A.5
- GMK®-SPHERE E-CROSS TIBIAL INSERTS CONTACT PRESSURE AND ● AREAS: COMPARATIVE ANALYSIS BETWEEN E-CROSS and UHMWPE DEVICES, Test Report A.6
- MATERIAL CHARACTERIZATION OF MEDACTA'S VITAMIN E HIGHLY CROSSLINKED UHMWPE (E-CROSS)
PYROGENICITY O
- Bacterial Endotoxin Test (LAL test) was conducted according to European Pharmacopoeia §2.6.14 (which is equivalent to USP chapter <85>)
- Pyrogen test according to USP chapter <151> for pyrogenicity determination
- o The subject devices are not labeled as non-pyrogenic or pyrogen free

Clinical Studies

No clinical studies were conducted
----------------------------This space intentionally left blank---------------------------------------------------------------------------------------------------------------

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Traditional 510(k)

K202022 page 7 of 7

Medacta International SA

VIII. Conclusion

Based on the above information, the GMK Sphere Flex insert E-CROSS (Vitamin E Highly Crosslinked UHMWPE), GMK Sphere CR E-CROSS (Vitamin E Highly Crosslinked UHMWPE) inserts and the E-CROSS Resurfacing Patella (Vitamin E Highly Crosslinked UHMWPE) are substantially equivalent to the identified predicate devices.

Substantial equivalence has been demonstrated through a comparison of intended use, design, and technological characteristics, as well as performance evaluations.

The GMK Sphere Extension implants are as safe and effective as the predicate devices

Regulation Number and Section

§ 888.3560 Knee joint patellofemorotibial polymer/metal/polymer semi-constrained cemented prosthesis.

(a)
Identification. A knee joint patellofemorotibial polymer/metal/polymer semi-constrained cemented prosthesis is a device intended to be implanted to replace a knee 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 a tibial component or components and a retropatellar resurfacing component made of ultra-high molecular weight polyethylene. This generic type of device is limited to those prostheses intended for use with bone cement (§ 888.3027).(b)
Classification. Class II.