CONFORMIS BICOMPARTMENTAL KNEE REPAIR SYSTEM

K053488 · Conformis, Inc. · NPJ · Mar 9, 2006 · Orthopedic

Device Facts

• Record ID: K053488
• Device Name: CONFORMIS BICOMPARTMENTAL KNEE REPAIR SYSTEM
• Applicant: Conformis, Inc.
• Product Code: NPJ · Orthopedic
• Decision Date: Mar 9, 2006
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 888.3560
• Device Class: Class 2
• Attributes: Therapeutic

Intended Use

The ConforMIS, Inc., BiCompartmental Knee Repair System is intended for use in patients with severe knee joint pain and disability whose conditions cannot be solely addressed by the use of a prosthetic device that treats only a single knee compartment, such as a unicondylar or patellofemoral prosthesis. The indications for use include restoring joint function and relief of pain due to: - painful joint disease due to osteoarthritis, traumatic arthritis or . rheumatoid arthritis of the knee - post traumatic loss of joint function . - . failed osteotomies, hemiarthoplasties and unicondylar implants. The BiCompartmental Knee Repair System may be utilized when the medial or lateral condyle and the patellofcmoral areas have been affected by one or more of these conditions. The ConforMIS, Inc., BiCompartmental Knee Repair System is intended only for use with bone cement.

Device Story

Patient-specific femorotibial semi-constrained total knee implant; designed from patient CT or MRI scans to match natural bone geometry. Inputs: patient imaging data. Processing: software removes surface defects to create smooth design image; Solid Works OTS software used for design. Output: custom metallic device (cobalt chromium molybdenum alloy) and UHMWP tibial/patellar components. Used in clinical settings by orthopedic surgeons. Device restores joint function and relieves pain in patients with multi-compartment knee disease. Integrates with ConforMIS Unicondylar Knee Replacement System tibial components and ConforMIS Total Knee Repair System patellofemoral components.

Clinical Evidence

Bench testing only. No clinical data provided.

Technological Characteristics

Materials: Cobalt chromium molybdenum alloy (ASTM-F-1537) and Ultra-High Molecular Weight Polyethylene (ASTM-F-648). Design: Patient-specific, semi-constrained, cemented. Connectivity: None. Sterilization: Not specified. Software: Uses OTS software for surface design and defect removal.

Indications for Use

Indicated for patients with severe knee joint pain and disability due to osteoarthritis, traumatic arthritis, rheumatoid arthritis, post-traumatic loss of function, or failed prior surgeries (osteotomies, hemiarthroplasties, unicondylar implants) where single-compartment treatment is insufficient. Applicable when medial or lateral condyle and patellofemoral regions are affected. Requires bone cement.

Regulatory Classification

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).

Predicate Devices

• Imaging Therapeutics™ Knee Interpositional Device (K033242)
• ConforMIS Unicondylar Knee (K043570)
• Smith & Nephew Hybrid Knee Femoral Components (K042896)
• Natural Knee® - Sulzer Orthopedics (K002356)

Submission Summary (Full Text)

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MAR 9 2006

510(k) Summary

# ConforMIS, Inc.

# BiCompartmental Knee Repair System

# 510(k) Premarket Notification K_0 5-34 88

# GENERAL INFORMATION

## Manufacturer:

ConforMIS Inc. 323 C Vintage Park Drive Foster City, CA 94404 Phone [phone] FAX [phone]

## Contact Person:

Patrick Hess, PhD Chief Executive Officer ConforMIS, Inc.

Date Prepared: December 5, 2005

# DEVICE INFORMATION

Trade/Proprietary Name: BiCompartmental Knee Repair System

Common/Classification Name: Knee joint femorotibial cemented prosthesis

Classification: 21 CFR 888.3530 – Knee joint femorotibial Classifications all polymer semi-constrained cemented prosthesis.

Device Class: Class II

Device Product Code: NPJ

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## PREDICATE DEVICES

The ConforMIS, Inc. BiCompartmental Knee Repair System is substantially equivalent to FDA-approved predicate devices with regard to indications for use and technological characteristics. These predicate devices are:

| Technological Characteristics | Indications for Use |
|------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------|
| • Imaging Therapeutics™ Knee Interpositional<br>Device (K033242)<br>• ConforMIS Unicondylar Knee (K043570) | • Smith & Nephew Hybrid Knee Femoral<br>Components (K042896)<br>• ConforMIS Unicondylar Knee<br>(K043570)<br>• Natrual Knee® - Sulzer Orthopedics<br>(K002356) |

### INTENDED USE

The ConforMIS, Inc., BiCompartmental Knee Repair System is intended for use in patients with severe knee joint pain and disability whose conditions cannot be solely addressed by the use of a prosthetic device that treats only a single knee compartment, such as a unicondylar or patellofemoral prosthesis. The indications for use include restoring joint function and relief of pain due to:

- painful joint disease due to osteoarthritis, traumatic arthritis or . rheumatoid arthritis of the knee
- post traumatic loss of joint function .
- . failed osteotomies, hemiarthoplasties and unicondylar implants.

The BiCompartmental Knee Repair System may be utilized when the medial or lateral condyle and the patellofcmoral areas have been affected by one or more of these conditions.

The ConforMIS, Inc., BiCompartmental Knee Repair System is intended only for use with bone cement.

### PRODUCT DESCRIPTION

The ConforMIS, Inc., BiCompartmental Knee Repair System is a femorotibial semi-constrained total knee implant. The design of the product incorporates a bone preserving approach, with minimal bone resection, for the treatment of severe pain and/or disability of a knee damaged by osteoarthritis or trauma. It is intended for use in those patients whose condition cannot be appropriately and effectively addressed using a device that treats only a single knee compartment

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(i.e. a unicondylar or patellofemoral prosthesis), when the medial or lateral condyle and the patellofemoral regions are affected. Using patient imaging (either CT or MRI scans), a patient specific implant is designed that best meets the geometric and anatomic requirements of the specific patient. The treatment allows for the placement of a cemented metallic device designed from the patient's natural bone geometry. The device is manufactured from cobalt chromium molybdenum alloy (ASTM-F-1537) from data obtained from images of the patient's individual geometry obtained using either CT or MRI scans. The tibial and patellar components are manufactured from Ulta-High Molecular Weight Polyethylene ("UHMWP" ASTM-F-648) The ConforMIS, Inc., Implant Software is used to remove surface defects to produce a working design image of a smooth surface. Off the Shelf (OTS) software is utilized to produce the surface Subsequently, Solid Works OTS software is used to create the design. ConforMIS, Inc., Implant Engineering Drawing. The BiCompartmental Knee Repair System is intended for use in conjunction with the tibial components of the ConforMIS Unicondylar Knee Replacement System and the patellofemoral components of the ConforMIS Total Knee Repair System.

### SUBSTANTIAL EQUIVALENCE

### Use of the Term "Substantial Equivalence"

The term "Substantial Equivalence" is used in this submission within the confines of the statutory use of the term in the FDA's evaluation of a Pre-Market Notification Submission. Any statement regarding Substantial Equivalence used in this submission relates only to whether the device that is the subject of this submission may be lawfully marketed in the United States without pre-market approval or reclassification, and should not be interpreted as an admission, or any kind or type of evidence, in any patent proceeding, including patent infringement litigation or proceeding before any Patent Office.

The present submission and statements therefore should not be construed as affecting or relating to the scope of any patent application, or to whether the product addressed in the submission, or its use, may be considered indistinct, from a patentability perspective, from any other device referred to in this submission.

#### Technological Characteristics

The technological characteristics of the ConforMIS, Inc., BiCompartmental Knee Repair System are substantially equivalent to those of the cited predicate orthonedic devices. The image analysis is identical to that used for the Imaging Therapeutics Interpositional Device (iPD) and the ConforMIS Unicondylar Implant. This device is equivalent in terms of design process, materials, production process, and equipment.

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# Indications for Use

Substantial equivalence is also supported for the ConforMIS, Inc., BiCompartmental Knee Repair System by the predicate devices previously cited and cleared in the treatment of osteoarthritic knees the use of such a device is warranted.

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Image /page/4/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services. The logo features a stylized caduceus, which is a symbol often associated with medicine and healthcare. The words "DEPARTMENT OF HEALTH AND HUMAN SERVICES USA" are arranged in a circular pattern around the caduceus. The logo is black and white.

Public Health Service

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

2006 MAR 9

ConforMIS, Inc c/o Patrick Hess, PhD Chief Executive Officer 323 Vintage Park Drive, Suite C Foster City, California 94404

Re: K053488

Trade/Device Name: ConforMIS BiCompartmental Knee Repair System Regulation Number: 21 CFR 888.3530 Regulation Name: Knee joint femorotibial metal/polymer semi-constrained cemented prosthesis Regulatory Class: Class II Product Code: NPJ Dated: December 13. 2006 Received: December 16, 2006

Dear Dr. Hess:

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. on 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). 11 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 docs 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

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Page 2 - Patrick Hess, PhD

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 Office of Compliance at [phone]. Also, please note the regulation emitled. "Misbranding by reference to premarket notification" (21CFR Part 807.97). 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 [phone] or [phone] or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.

Sincerely vours.

Herbert Lewis

Mark N. Melkerson Acting Director Division of General. Retorative and Neurological Devices Center for Devices and Radiological Health

Enclosure

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510(k) Number: K _____________________________________________________________________________________________________________________________________________________________

Device Name: ConforMIS, Inc., BiCompartmental Knee Repair System

Indications for Use:

The ConforMIS, Inc., BiCompartmental Knee Repair System is intended for The Conformils, Inc., Dicomparinent and disability whose conditions use in pattents with severe know form passes of a prosthetic device that treats only a single knee compartment, such as unicondylar or patellofemoral prosthesis. The indications for use include restoring joint function and relief of pain due to:

- painful joint disease due to osteoarthritis, traumatic arthritis or . rheumatoid arthritis of the knee
- post traumatic loss of joint function .
- post tradinatio 1005 01 Juliarthoplasties and unicondylar implants. .

The BiCompartmental Knee Repair System may be utilized when the medial The BROMIPATICAL TERS REPART COLLER COLLER COLLECT affected by one or more of these conditions.

The ConforMIS, Inc., BiCompartmental Knee Repair System is intended only for use with bone cement.

Over-The-Counter Use Prescription Use _____________________________________________________________________________________________________________________________________________________________ Prescription Use _____x_______________________________________________________________________________________________________________________________________________________ (Part 21 CFR 801 Subpart C)

(PLEASE DO NOT WRITE BELOW THIS LINE-

CONTINUE ON ANOTHER PAGE IF NEEDED)

Herbert Leunig

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

**510(k) Number** K053488

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