PHYSICA KR KNEE SYSTEM
Device Facts
| Record ID | K141934 |
|---|---|
| Device Name | PHYSICA KR KNEE SYSTEM |
| Applicant | Lima Corporate S.P.A. |
| Product Code | JWH · Orthopedic |
| Decision Date | Apr 2, 2015 |
| Decision | SESE |
| Submission Type | Traditional |
| Regulation | 21 CFR 888.3560 |
| Device Class | Class 2 |
| Attributes | Therapeutic |
Indications for Use
Physica total knee system is indicated for use in knee arthroplasty in skeletally mature patients with the following conditions: - Non-inflammatory degenerative joint disease: including osteoarthritis, traumatic arthritis, or avascular necrosis; - Inflammatory degenerative joint disease including rheumatoid arthritis; - Correction of functional deformity; - Revision procedures where other treatments or devices have failed; and - Treatment of fractures that are unmanageable using other techniques. Physica knee system is intended for cemented fixation.
Device Story
Physica KR knee system is a modular, semi-constrained, fixed-bearing total knee replacement prosthesis. Components include femoral component (CoCrMo), tibial plate (Ti6Al4V), tibial liner (UHMWPE), patella (UHMWPE), and optional modular tibial stem (Ti6Al4V). Device is intended for cemented fixation in knee arthroplasty. Surgeons implant the device in an OR setting to replace damaged knee joint surfaces. The femoral component features asymmetric condyles; the tibial plate uses a snap-fit mechanism to secure the liner. The system aims to restore joint function, correct deformities, and alleviate pain associated with degenerative or inflammatory joint disease. Clinical benefit is derived from mechanical reconstruction of the knee joint, providing stability and articulation for patients with severe joint pathology.
Clinical Evidence
No clinical data. Substantial equivalence demonstrated via non-clinical bench testing, including fatigue testing of the tibial plate, wear testing, constraint tests at tibio-femoral and patello-femoral interfaces, contact area/pressure analysis, locking strength testing, and static shear testing on the patella.
Technological Characteristics
Modular knee prosthesis. Materials: CoCrMo (ISO 5832-4/ASTM F75) for femoral components; Ti6Al4V (ISO 5832-3/ASTM F1472) for tibial plates and stems; UHMWPE (ISO 5834-2/ASTM F648) for liners and patella. Design: Semi-constrained, fixed-bearing. Fixation: Cemented. Connectivity: None. Sterilization: Sterile single-use.
Indications for Use
Indicated for skeletally mature patients requiring knee arthroplasty due to non-inflammatory degenerative joint disease (osteoarthritis, traumatic arthritis, avascular necrosis), inflammatory degenerative joint disease (rheumatoid arthritis), functional deformity, failed prior treatments/devices, or unmanageable fractures.
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
- G1 knee system (Aequos, K033260)
- Journey II CR knee system (Smith&Nephew, K121443)
- Genesis II (Smith&Nephew, K951987)
- EVOLUTION MP total knee system (Wright Medical Technology, K093552)
Submission Summary (Full Text)
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
April 2, 2015
Limacorporate S.p.A. % Mr. Stephen Peoples Peoples & Associates Consulting LLC 5010 Lodge Pole Lane Fort Wayne, Indiana 46814
Re: K141934 Trade/Device Name: Physica KR knee system Regulation Number: 21 CFR 888.3560 Regulation Name: Knee joint patellofemorotibial polymer/metal/polymer semi-constrained cemented prosthesis Regulatory Class: Class II Product Code: JWH, HRY Dated: February 25, 2015 Received: February 27, 2015
Dear Mr. Peoples:
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. 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.
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); good manufacturing practice requirements as set
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Page 2 – Mr. Stephen Peoples
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.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm. Also, please note the regulation entitled. "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely vours.
# Mark N. Melkerson -S
Mark N. Melkerson Director Division of Orthopedic Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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510(k) Number (if known): K141934 Device Name: Physica KR knee system Indications for Use:
# Physica KR knee system Indications for Use
Physica total knee system is indicated for use in knee arthroplasty in skeletally mature patients with the following conditions:
- · Non-inflammatory degenerative joint disease: including osteoarthritis, traumatic arthritis, or avascular necrosis;
- · Inflammatory degenerative joint disease including rheumatoid arthritis;
- · Correction of functional deformity;
- · Revision procedures where other treatments or devices have failed; and
- · Treatment of fractures that are unmanageable using other techniques.
Physica knee system is intended for cemented fixation.
Prescription Use X (Part 21 CFR 801 Subpart D)
AND/OR
Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Page 1 of 1
Traditional 510(k) – Physica KR knee system
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# Summarv of Safety and Effectiveness
Date: July 3, 2014
Manufacturer: Limacorporate S.p.A. Via Nazionale, 52 33038 – Villanova di San Daniele Udine - Italy
U.S. Contact Person: Dr. Stephen J. Peoples Principal Consultant Phone: 260-645-0327 FAX: +39 0432945512
| Product | Common<br>Name | Product<br>Code | Regulation and Classification Name |
|---------------------------|----------------------|-----------------|-------------------------------------------------------------------------------------------------------------------------|
| Physica KR<br>knee system | Total Knee<br>System | JWH | Knee ioint Patellofemorotibial<br>Polymer/Metal/Polymer Semi-<br>Constrained Cemented Prosthesis per 21<br>CFR 888.3560 |
| | | HRY | Knee joint Femorotibial Metal/Polymer<br>Semi-Constrained Cemented Prosthesis<br>per 21 CFR 888.3530 |
#### Description
The Physica KR Knee Replacement System is a total knee replacement system consisting of femoral, tibial plate, tibial liner, patella, and tibial stem components; the tibial stem and patella components are optional to be used as required for each individual patient. The Physica KR knee system devices are intended to be used with bone cement.
The femoral components are made of CoCrMo alloy according to the requirements of ISO 5832-4 and ASTM F75. The articulating surface is polished and has asymmetric condyles along the sagittal plane. Conformity between the inner surface of the components and the resected bone of the distal femur and two fixation pegs provide stability. Ten (10) sizes in left and right versions are available. The tibial plates are made of Ti6Al4V alloy meeting the specifications of ISO 5832-3 and ASTM F1472. The inferior aspect of the component has a keel and an optional modular tibial stem, manufactured from Ti6Al4V alloy, provide stability. A plug manufactured from standard UHMWPE (ISO 5834-2 / ASTM F648) is used to fill the female taper hole used to attach the optional stem; the plug is removed if a stem is used. The superior portion of the tibial plate is designed to lock the tibial liner through a snap-fit mechanism; the superior surface of the plate is polished to reduce back-side wear of the liner. Ten sizes of symmetric tibial plates are available.
Liners are made of standard UHMWPE (ISO 5834-2 / ASTM F648). They are characterized by a concave medial hemi-plateau along the sagittal plane while the lateral
Traditional 510(k) - Physica KR knee system
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plateau is slightly convex. The articulating hemi-plateaus are both concave along the frontal plane. The liner is attached to the tibial plate through a snap-fit mechanism The anterior aspect of the liner is shaped to accommodate the patellar tendon during flexionextension movements of the knee. Ten (10) sizes, correspondently to the tibial plate sizes, in six (6) thicknesses, are available in versions for left and right knees.
Tibial stems, in three (3) lengths (20, 40, and 60mm), are made of Ti6Al4V alloy (ISO 5832-3 / ASTM F1472). They stems are 15.5mm in diameter and cylindrical in shape with longitudinal grooves intended to increase the torsional stability of the device and to facilitate the distribution of the bone cement on the device during its insertion. Three lengths are available.
The all-polyethylene patella components, in six (6) diameters (26, 29, 32, 35, 38, and 41mm), are made of standard UHMWPE (ISO 5834-2 / ASTM F648). The components have a biconvex surface to articulate with the trochlear groove of the femoral component. The inferior surface has three (3) pins / pegs and a cement pocket to aid in fixation.
### Intended Use
Physica total knee system is indicated for use in knee arthroplasty in skeletally mature patients with the following conditions:
- · Non-inflammatory degenerative joint disease: including osteoarthritis, traumatic arthritis, or avascular necrosis;
- · Inflammatory degenerative joint disease including rheumatoid arthritis;
- · Correction of functional deformity;
- · Revision procedures where other treatments or devices have failed; and
- · Treatment of fractures that are unmanageable using other techniques.
Physica knee system is intended for cemented fixation.
## Predicate Devices
- G1 knee system (Aequos, K033260);
- Journey II CR knee system (Smith&Nephew, K121443) and Genesis II ● (Smith&Nephew, K951987);
- EVOLUTION MP total knee system (Wright Medical Technology, K093552). ●
## Basis of Substantial Equivalency
The subject Physica KR knee system and all of the predicates are semi-constrained, fixed bearing modular knee replacement systems. The subject device and all of the predicates are of similar design and geometry and have similar indications for use such as total knee replacement for non-inflammatory arthritis such as OA and post-traumatic arthritis and inflammatory arthritis such as RA. The Wright Medical predicate also includes the
Traditional 510(k) - Physica KR knee system
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indication for use of treatment of fractures while the Smith & Nephew predicate includes the indication for use of treating failed osteotomies and failed unicompartmental and total knee replacements. The subject device as well as all of the predicates is intended to be fixed with bone cement. All of the devices are manufactured from similar materials. The Physica KR femoral components as well as the femoral components of all of the predicates are manufactured from CoCrMo alloy. All patella components are manufactured from standard ultra high molecular weight polyethylene (UHMWPE). The tibial base plate of the subject device and the Smith & Nephew Journey II predicate are manufactured from Ti6Al4V alloy while the tibial plates of the G1 and Evolution MP devices are manufactured from CoCrMo alloy. All devices have tibial liners made from standard UHMWPE while the Smith & Nephew predicate also has liners available in cross-linked UHMWPE. The subject device and the G1 have modular tibial stems: the subject device's tibial stem is manufactured from Ti6Al4V alloy while G1 predicate has tibial stems manufactured from CoCrMo alloy. The subject device tibial tray is keeled as Smith & Nephew Journey II and Wright Medical device. The subject device as well as all of the predicates has femoral and tibial liner components in left and right versions. The Physica KR device and the G1 predicate have tibial plates that can be used in either left or right knees while the Smith & Nephew and Wright Medical tibial plates are provided in left and right knee versions. All devices are available in a similar range of sizes and all devices are sterile packaged single use devices sterilized by similar methods.
#### Non-Clinical Testing
The following tests were performed on Physica KR knee system devices:
- Fatigue testing of the tibial plate; ●
- Wear test;
- Constraint tests at tibio-femoral and patello-femoral interfaces; ●
- Contact areas and pressures at tibio-femoral and patello-femoral interfaces; ●
- Test on the locking strength between the tibial plate and the tibial liner; ●
- o Static shear test on the patella.
Mechanical testing was performed on worst case components or constructs. The testing results demonstrated the device's ability to perform under expected clinical conditions.
#### Clinical Testing:
Clinical testing was not necessary to demonstrate substantial equivalence of the Physica KR knee system to the predicate devices.
