Advanced degeneration of the hip joint as a result of degenerative, post-traumatic or rheumatoid arthritis.
Fracture or avascular necrosis of the femoral head
Failure of previous hip surgery: joint reconstruction, internal fixation, arthrodesis, hemiarthroplasty, surface replacement arthroplasty, or total hip replacement
All forms of osteoarthritis
Patients with hips at risk of dislocation
Femoral neck fracture or proximal fracture to hip joint

The REDAPT Porous Acetabular Shell for use with the POLACUP Dual Mobility System is intended for single use only and is to be implanted without bone cement. The POLARCUP Dual Mobility System is to be implanted in the REDAPT Porous Acetabular Shell with bone cement.

Device Description

The REDAPT Porous Acetabular Shell is designed for cementless use on the boneinterfacing surface and is made from titanium alloy (Ti-6Al-4V) powder through an additive manufacturing process. The device design allows for the cementing of liners into the shell and incorporates screw holes for fixation.

The POLARCUP Dual Mobility System consists of a metal shell and plastic liner (or insert). POLARCUP Shell is made from Stainless Steel. The inside of the metal shell is polished, and the outside of the plastic liner is able to articulate against this polished surface. The POLARCUP™ Dual Mobility System is an acetabular hip cup prosthesis.

The subject device consists of a REDAPT Porous Acetabular Shell for use with the POLACUP Dual Mobility System. The REDAPT Porous Acetabular Shell is intended to be implanted without bone cement. The POLARCUP Dual Mobility System is to be implanted in the REDAPT Porous Acetabular Shell with bone cement.

The purpose of this 510(k) submission is to modify the indications for the REDAPT Porous Acetabular Shell to allow for a dual mobility use when used with the POLARCUP Dual Mobility System.

AI/ML Overview

This is a premarket notification for a medical device (hip implant components), not an AI/ML powered device. As such, the information requested regarding acceptance criteria, study details, expert involvement, and ground truth for AI/ML models is not applicable to this document.

The document discusses the substantial equivalence of the REDAPT Porous Acetabular Shell with the POLARCUP Dual Mobility System to existing predicate devices based on:

Technological Characteristics: The subject device components are stated to be identical to previously cleared devices. The assessment focused on the compatibility of the two systems.
Biocompatibility: An evaluation was conducted according to FDA Draft Guidance and ISO-10993 for permanent implants.
Mechanical Testing: Non-clinical bench testing was performed.

Here's a summary of the requested information that can be extracted from the document, with an emphasis on why other points are not applicable:

A table of acceptance criteria and the reported device performance:

Test Type	Acceptance Criteria	Reported Device Performance
Bacterial Endotoxin Testing	Met acceptable endotoxin limits as stated in FDA Guidance and ANSI/AAMI ST72. (Implicit)	Met the acceptable endotoxin limits.
Biocompatibility	Adherence to FDA Draft Guidance and ISO-10993 (Implicit - for permanent implants, >30 days)	Evaluation completed, summary rationale provided.
Mechanical Testing	Pre-determined acceptance criteria (Specific criteria not detailed in the document)	Met the acceptance criteria for all outputs. The proposed devices are substantially equivalent to the predicate.

Sample size used for the test set and the data provenance (e.g. country of origin of the data, retrospective or prospective):
- Sample Size: Not specified in the document for any of the tests.
- Data Provenance: Not applicable. The tests are non-clinical bench and biocompatibility evaluations, not human data studies.
Number of experts used to establish the ground truth for the test set and the qualifications of those experts (e.g. radiologist with 10 years of experience):
- Not applicable. This is not an AI/ML powered device requiring expert-established ground truth.
Adjudication method (e.g. 2+1, 3+1, none) for the test set:
- Not applicable. This is not an AI/ML powered device requiring adjudication.
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:
- No. Not applicable, as this is not an AI/ML powered device.
If a standalone (i.e. algorithm only without human-in-the-loop performance) was done:
- No. Not applicable, as this is not an AI/ML powered device.
The type of ground truth used (expert concensus, pathology, outcomes data, etc):
- Not applicable. For this type of device, "ground truth" is typically defined by engineering specifications, material standards (ASTM, ISO), and established testing protocols for mechanical and biocompatibility performance.
The sample size for the training set:
- Not applicable. This is not an AI/ML powered device.
How the ground truth for the training set was established:
- Not applicable. This is not an AI/ML powered device.

Summary

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September 24, 2018

Image /page/0/Picture/1 description: The image shows the logos of the Department of Health and Human Services and the Food and Drug Administration (FDA). The Department of Health and Human Services logo is on the left, and the FDA logo is on the right. The FDA logo includes the letters "FDA" in a blue square, followed by the words "U.S. FOOD & DRUG ADMINISTRATION" in blue text. The logos are simple and professional, and they are easily recognizable.

Smith & Nephew, Inc. Bryan Cowell Senior Regulatory Affairs Specialist 7135 Goodlett Farms Parkway Cordova, Tennessee 38016

Re: K181366

Trade/Device Name: REDAPT Porous Acetabular Shells Regulation Number: 21 CFR 888.3358 Regulation Name: Hip Joint Metal/Polymer/Metal Semi-Constrained Porous-Coated Uncemented Prosthesis Regulatory Class: Class II Product Code: LPH, OQG, KWZ, LZO, JDI, KWY Dated: August 28, 2018 Received: August 29, 2018

Dear Bryan Cowell:

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.

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

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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/CombinationProducts/GuidanceRegulatoryInformation/ucm597488.htm); 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 http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm.

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/DeviceRegulationandGuidance/) and CDRH Learn (http://www.fda.gov/Training/CDRHLearn). 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 (http://www.fda.gov/DICE) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).

Sincerely,

Daniel S. Ramsey -S 2018.09.24 11:56:55 -04'00'

For Mark N. Melkerson Director Division of Orthopedic Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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Indications for Use

510(k) Number (if known) K181366

Device Name REDAPT Porous Acetabular Shell

Indications for Use (Describe)

Advanced degeneration of the hip joint as a result of degenerative, post-traumatic or rheumatoid arthritis.
Fracture or avascular necrosis of the femoral head
Failure of previous hip surgery: joint reconstruction, internal fixation,

arthrodesis, hemiarthroplasty, surface replacement arthroplasty, or total hip replacement

All forms of osteoarthritis

- Patients with hips at risk of dislocation

Femoral neck fracture or proximal fracture to hip joint

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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510(k) Summary Smith & Nephew REDAPT Porous Acetabular Shells

SUBMITTER:I.	Smith & Nephew, Inc.Orthopaedic Division7135 Goodlett Farms ParkwayCordova, Tennessee 38016
	Phone: (901) 396-1633Fax: (901) 566-7159
	Contact Person: Michael ScottDate Prepared: September 7, 2018
II.DEVICE
Name of Device:Common Name:Regulatory Class:	REDAPT Porous Acetabular ShellsAcetabular Component2
Classification Name,Regulation Number,Product Codes,	Hip joint metal/polymer/metal semi-constrained porous-coateduncemented prosthesis (CFR 888.3358) LPHHip joint metal/polymer/metal semi-constrained porous-coateduncemented prosthesis (CFR 888.3358)OQGHip joint metal/polymer constrained cemented or uncementedprosthesis (CFR 888.3310) KWZHip joint metal/ceramic/polymer semi-constrained cemented ornonporous uncemented prosthesis (CFR 888.3353) LZOHip joint metal/polymer semi-constrained cemented prosthesis(CFR 888.3350)JDIHip joint femoral (hemi-hip) metal/polymer cemented oruncemented prosthesis (888-3390) KWY
PREDICATE DEVICE	Primary Predicate REDAPT Porous Acetabular Shells: K150790(S.E. 11/16/2015)Predicate 2: POLARCUP Dual Mobility System: K110135 (S.E.10/14/2011)Predicate 3: G7 Dual Mobility System: K150522 (S.E. 05/01/2015)Predicate 4: Trabecular Metal Acetabular Revision SystemCemented Constrained Liner K072121 (S.E. 01/07/2008)

The predicate devices have not been subject to a design related recall.

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DEVICE DESCRIPTION III.

The purpose of this 510(k) submission is to modify the indications for the REDAPT Porous Acetabular Shell to allow for a dual mobility use when used with the POLARCUP Dual Mobility System.

INDICATIONS FOR USE IV.

Advanced degeneration of the hip joint as a result of degenerative, post-traumatic or . rheumatoid arthritis.
. Fracture or avascular necrosis of the femoral head
Failure of previous hip surgery: joint reconstruction, internal fixation, arthrodesis, . hemiarthroplasty, surface replacement arthroplasty, or total hip replacement
. All forms of osteoarthritis
Patients with hips at risk of dislocation .
. Femoral neck fracture or proximal fracture to hip joint

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The REDAPT Porous Acetabular Shell for use with the POLARCUP Dual Mobility System is intended for single use only and is to be implanted without bone cement. The POLARCUP Dual Mobility System is to be implanted in the REDAPT Porous Acetabular Shell with bone cement.

V. COMPARISON OF TECHNOLOGICAL CHARACTERISTICS WITH THE PREDICATE DEVICE

There are no technological differences between the subject and predicate REDAPT Porous Acetabular Shells K150790 (S.E. 11/16/2015).

There are no technological differences between the POLARCUP Dual Mobility System components and the previously cleared POLARCUP Dual Mobility System components K110135 (S.E. 10/14/2011).

To allow for a dual mobility option for the existing REDAPT Porous Acetabular Shells, this submission allows for the existing POLARCUP Dual Mobility System to be implanted in the REDAPT Porous Acetabular Shells with bone cement.

As the devices are identical to the existing 510(k) cleared devices, the technological characteristics assessed consisted of the compatibility of the two systems.

Bacterial endotoxin testing was completed and met the acceptable endotoxin limits as stated in the FDA Guidance , "Submission and Review of Sterility Information in Premarket Notification (510(k)) Submissions for Devices Labeled as Sterile," "Pyrogen and Endotoxins Testing: Questions and Answers," and ANSI/AAMI ST72.

Therefore, the technological characteristics of the subject device are the similar to the technological characteristics of the predicate devices REDAPT Porous Acetabular Shells (S.E. (K150790 (S.E. 11/16/2015) and POLARCUP Dual Mobility System (S.E. K150522 (S.E. 05/01/2015)).

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VI. PERFORMANCE DATA

The following performance data are provided in support of the substantial equivalence determination.

Biocompatibility

As part of the compatibility assessment, a biocompatibility evaluation was completed for the combination usage of non-cemented REDAPT Porous Acetabular Shell with the cemented POLARCUP Dual Mobility System.

The biocompatibility evaluation for the combination usage of non-cemented REDAPT Porous Acetabular Shell with the cemented POLARCUP Dual Mobility System was conducted in accordance with FDA's Draft Guidance for Industry and FDA Staff "Use of International Standard ISO-10993, Biological Evaluation of Medical Devices Part 1: Evaluation and Testing Within a Risk Management Process".

The subject REDAPT Porous Acetabular Shell with the POLARCUP Dual Mobility System are permanent implants and will be classified as permanent, >30 day body contact according to ISO-10993, "Biological Evaluation of Medical Devices Part 1: Evaluation and Testing within a Risk Management Process".

The subject REDAPT Porous Acetabular Shells are made of titanium-6 aluminum-4 vanadium (Ti-6Al-4V) alloy. The material is considered surgical grade and meets ASTM F1472 standard specification. The Ti-6Al-4V alloy meets the quality and chemical composition given in Smith & Nephew Specifications.

The cemented POLARCUP Shell is made from Stainless Steel INOX M30NW meeting the requirement of ISO 5832-9. The POLARCUP XLPE Insert is made from ultra-high molecular weight polyethylene (UHMWPE) and highly cross-linked UHMWPE (XLPE). The material is considered surgical grade meeting the requirements of ISO 5834-1/2. The quality and processing of the material is controlled by Smith and Nephew specifications.

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Biocompatibility evaluation has been completed and a summary rationale has been provided for the subject LEGION Finned Tibial Wedges.

Mechanical testing

To further support a determination of substantial equivalence, non-clinical bench (mechanical) testing was conducted on the proposed REDAPT Porous Acetabular Shell with the cemented POLARCUP Dual Mobility System. Test results demonstrated that the proposed devices are substantially equivalent to the predicate REDAPT Porous Acetabular Shell System.

Mechanical tests/assessments completed were:

Environmental Corrosion Fatigue
Fatigue .
Post Fatigue Push-Out ●
Lever Out ●
Torque to Failure ●
Range of Motion .
Tolerance Stack Analysis ●

The subject devices with pre-determined acceptance criteria met the acceptance criteria for all outputs.

CONCLUSIONS VII.

Based on the verification evidence activities provided in the pre-market notification, the subject REDAPT Porous Acetabular Shell for use with the POLACUP Dual Mobility System is substantially equivalent to the legally marketed predicate devices: REDAPT Porous Acetabular Shells: K150790 (S.E. 11/16/2015), POLARCUP Dual Mobility System: K110135 (S.E. 10/14/2011). G7 Dual Mobility System: K150522 (S.E. 05/01/2015) and Trabecular Metal Acetabular Revision System Cemented Constrained Liner K072121 (S.E. 01/07/2008).

Regulation Number and Section

§ 888.3358 Hip joint metal/polymer/metal semi-constrained porous-coated uncemented prosthesis.

(a)
Identification. A hip joint metal/polymer/metal semi-constrained porous-coated uncemented prosthesis is a device intended to be implanted to replace a hip 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 has a femoral component made of a cobalt-chromium-molybdenum (Co-Cr-Mo) alloy or a titanium-aluminum-vanadium (Ti-6Al-4V) alloy and an acetabular component composed of an ultra-high molecular weight polyethylene articulating bearing surface fixed in a metal shell made of Co-Cr-Mo or Ti-6Al-4V. The femoral stem and acetabular shell have a porous coating made of, in the case of Co-Cr-Mo substrates, beads of the same alloy, and in the case of Ti-6Al-4V substrates, fibers of commercially pure titanium or Ti-6Al-4V alloy. The porous coating has a volume porosity between 30 and 70 percent, an average pore size between 100 and 1,000 microns, interconnecting porosity, and a porous coating thickness between 500 and 1,500 microns. The generic type of device has a design to achieve biological fixation to bone without the use of bone cement.(b)
Classification. Class II.