ARCOMXL POLYETHYLENE LINERS

K042051 · Biomet, Inc. · LPH · Mar 8, 2005 · Orthopedic

Device Facts

• Record ID: K042051
• Device Name: ARCOMXL POLYETHYLENE LINERS
• Applicant: Biomet, Inc.
• Product Code: LPH · Orthopedic
• Decision Date: Mar 8, 2005
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 888.3358
• Device Class: Class 2
• Attributes: Therapeutic

Intended Use

1) Non-inflammatory degenerative joint disease including osteoarthritis and avascular necrosis, 2) Rheumatoid arthritis, 3) Correction of functional deformity 4) Treatment of nonunion, femoral neck and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques, 5) Revision of previously failed total hip arthroplasty. Cemented and Uncemented Applications.

Device Story

ArComXL™ is a highly cross-linked ultra-high molecular weight polyethylene (UHMWPE) acetabular liner used in total hip arthroplasty. The device is manufactured via isostatic compression molding followed by 50kGy gamma irradiation under argon to increase cross-linking. It is sterilized via gas plasma or ethylene oxide. The liner is designed to articulate with 32mm CoCr femoral heads within an acetabular shell. Used by orthopedic surgeons in clinical settings, the device serves as a bearing surface to replace damaged hip joint cartilage. The increased cross-linking and oxidative stability are intended to reduce volumetric wear rates and improve mechanical strength compared to standard UHMWPE, potentially extending the service life of the hip implant and reducing the risk of osteolysis caused by wear debris.

Clinical Evidence

No clinical data provided. Evidence is based on bench testing: hip simulator wear (5 million cycles standard, 2 million cycles abrasive), Electron Spin Resonance (ESR) for free radical concentration, FTIR for oxidative stability after accelerated aging (ASTM F2003-00), and mechanical testing (tensile per ASTM D638-02a, small punch per ASTM F2183-02). Results showed 47% reduction in volumetric wear, 64% reduction in abrasive wear, 94% reduction in free radicals, and improved oxidative stability compared to predicate.

Technological Characteristics

Material: UHMWPE per ASTM F648. Manufacturing: Isostatic compression molding, 50kGy gamma irradiation under argon. Sterilization: Gas plasma or ethylene oxide. Mechanical properties: Increased cross-linking, improved ultimate tensile strength, and oxidative resistance. Form factor: Acetabular liner, 32mm inner diameter, 4.75mm bearing thickness.

Indications for Use

Indicated for patients with non-inflammatory degenerative joint disease (osteoarthritis, avascular necrosis), rheumatoid arthritis, functional deformity, nonunion, femoral neck/trochanteric fractures of the proximal femur with head involvement, or revision of failed total hip arthroplasty. Suitable for cemented and uncemented applications.

Regulatory Classification

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.

Predicate Devices

• ArCom® Polyethylene Liners and Components (K023357)
• RingLoc® 36mm Liners (K032396)

Submission Summary (Full Text)

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K042051

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BIOMET

MAR 8 - 2005

# 510(k) Summary

| NATA |
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Sponsor: Biomet Manufacturing Corp. 56 East Bell Drive P.O. Box 587 Warsaw, IN 46581-0587 Contact Person: Tracy Bickel Johnson, RAC ArComXL™ Polyethylene Liners Proprietary Name: Common Name; UHMWPE Classification Name: - hip jolnt metal/polymer/metal semi-constralned porous coated uncemented prosthesis (888.3358) - hip joint metal/polymer semi-constrained cemented prosthesis (888.3350) Substantlally Equivalent Devices: -ArCom® Polyethylene Liners and Components (K023357) -RingLoc® 36mm Liners (K032396) Device Description: Biomet Manufacturing Corp. is modifying the manufacturing process of UHMWPE used in the fabrication of polyethylene acetabular components. The modified manufacturing process results in a higher cross-linked polyethylene, that Biomet will herein refer to as ArComXL™. Indications for Use: 1) Non-inflammatory degenerative ioint disease including osteoarthritis and avascular necrosis, 2) Rheumatoid arthritis, 3) Correction of functional deformity 4) Treatment of nonunion, femoral neck and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques, 5) Revision of previously failed total hip arthroplasty. Cemented and Uncemented Applications. Summary of Technologies: The intended use, indications, contraindications, and design specifications of the subject components remain identical to their predicate component counterparts. The raw material being utilized in the manufacture of both the subject and the predicate devices remains a ultra-high molecular weight polyethylene (UHMWPE) per ASTM F-648. The modifications to the manufacturing process of this polyethylene will be Introduced in order to create a higher crosslinked polyethylene. The safety and effectiveness of this crosslinked polyethylene in acetabular applications, as well as the proposed wear claims, are adequately supported by the substantial equivalence information, materials data, and testing results provided within this Premarket Notlfication.

> MAILING ADDRESS P.O. Box 587 Warsaw, IN 46581-0587

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SHIPPING ADDRESS 56 E. Bell Drive Warsaw, IN 46582

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OFFICE 574.267.6639

ドヘメ 574.267.8137

E-MAIL [e-mail]

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042051

### 510(k) Summary- Page 2 of 3 ArComXL™ Polyethylene Liners

## Claims:

### Hip Simulator Wear

The Biomet ArComXL™ polyethylene acetabular inserts (Part No.: XL-105933) tested are isostatically compression molded highly crosslinked components (50kGy gamma irradiated under argon) that are sterilized in alr by either gas plasma or ethylene oxide. ArComXL™ was compared to identical predicate polyethylene liners (Part No.: 12-105893) that were machined from isostatically molded polyethylene that was subsequently gamma sterilized (25-40kGy) in argon. A side by side hip simulator wear test of the two materials showed a 47% reduction in the volumetric wear rate (34.9 opposed to 65.8 mm³/10° cycles) for ArComXL™ (EtO sterilized) when compared to the predicate device. All inserts In this study mate with either a 50 or 52mm acetabular shell, have a standard rim, a 32 mm inner dlameter, and a 4.75 mm bearing thickness. Testing was performed under multiaxial hip joint simulation for five (5) million cycles, using a Paul Hip load profile with a maximum load of 2.4kN, 32 mm CoCr articulating heads, and a bovine calf servim lubricant. The results of in vitro hip wear simulator tests have not been shown to quantitatively predict clinical wear performance.

### Abrasive Hip Simulator Wear

The Biomet ArComXL™ polyethylene acetabular inserts (Part No.: XL-105933) tested are isostatically compression molded highly crosslinked components (50kGy gamma irradiated under argon) that are sterilized in air by either gas plasma or ethylene oxide. ArComXL™ was compared to Identical predicate polyethylene liners (Part No.: 12-105893) that were machined from isostatically moded polyethylene that was subsequently gamma sterilized (25-40kGy) in argon. After 5 million cycles of hip simulator wear with no additives, bone cement particulate was added to simulate abrasive conditions for two (2) million cycles. Under abrasive conditions, the Biomet ArComXL™ (EtO sterilized) polyethylene acetabular insert (Part No.: XL-105933) showed a 64% reduction In volumetric wear rate (109.8 opposed to 309.0 mm /10 cycles) when compared to the same acetabular inserts fabricated from the predicate polyethylene (Part No .: 12-105893). These Inserts mate with either a 50 or 52mm acetabular shell, have a standard rim, a 32mm inner diameter, and a 4.75 mm bearing thickness. Testing was performed under multiaxial hip joint slawlation for two (2) million cycles, using a Paul Hip load profile with a maximum load of 2.4kN, 32 mm CoCr articulating heads, and bovine calf serum lubricant. The results of in vitro hip wear simulator tests have not been shown to quantitatively predict clinical wear performance.

### Free Radicals

The Biomet ArComXL™ polyethylene material tested is isostatically compression molded, highly crosslinked (50kGy gamma irradiated under argon), and sterilized in air by either gas plasma or ethylene oxlde. ArComXL™ was compared to predicate polyethylene material that was machined from isostatically molded polyethylene that was subsequently gamma sterllized (25-40kGy) in argon. The Biomet ArComXL™ (Gas Plasma sterflized) material, showed a 94% reduction in the number of free radicals (0.22x1055 compared to 3.82x1045 spins/g) versus the predicate polyethylene material. Testing was performed by an independent laboratory using Electron Spin Resonance (ESR). Results of in vitro free radical testing have not been shown to quantitatively predict oxldation resistance.

### OxIdative Stability

The Biomet ArComXL™ polyethylene material tested is isostatically compression molded, highly crosslinked (50kGy gamma irradlated under argon), and sterilized in air by elther gas plasma or ethylene oxide, ArComXL™ was compared to predicate polyethylene material that was machined from isostatically molded polyethylene that was subsequently gamma sterilized (25-40KGy) in argon.

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042051

## 510(k) Summary- Page 3 of 3 ArComXL™ Polyethylene Liners

The Biomet ArComXL™ (Gas Plasma sterlized) material did not show any measurable oxidation by FTIR (oxidation index less than 0.4 throughout the sample) after accelerated aging per ASTM F2003-00, which is designed to simulate several years of shelf-aging in air. In contrast, when the predicate material was removed from inert packaging that was vacuum sealed after purging with argon), it did show measurable levels of oxidation after accelerated aging (oxidation index was greater than 1.1 at a depth of 1 mm). Further, after accelerated aging the average ultimate load for all three ArComXL™ axes (Gas Plasma Sterilized) remained higher than the peak load (31% higher; 91.8N vs. 70.2N); whereas the uttimate load for the isotropic predicate material was significantly less than the peak load (44% lower; 42.6N) as measured by small punch testing, ASTM F2183-02.

### Mechanical Strength

The Biomet ArComXL™ polyethylene material tested is isostatically compression molded, highly crosslinked (50kGy gamma irradiated under argon), and sterilized in air by either gas plasma or ethylene oxide. ArComXL™ was compared to predicate polyethylene material that was machined from isostatically molded polyethylene that was subsequently gamma sterilized (25-40kGy) in argon. The Biomet ArComXL™ (EtO sterilized) material showed a 30% increase in ultimate tensile strength (from 47 MPa to 61 MPa) in the longitudinal axis versus the predicate polyethylene material. The tensile testing was performed per ASTM standard D638-02a using Type 5 tensile specimens.

Non-Clinical Testing: Verification activities were performed on ArComXL. Met or exceeded current standards or guidelines.

Clinical Testing: None provided as a basis for substantial equivalence.

All trademarks are property of Biomet, Inc.

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Image /page/3/Picture/1 description: The image shows the logo for the U.S. Department of Health and Human Services. The logo is circular and contains the text "DEPARTMENT OF HEALTH AND HUMAN SERVICES - USA" around the perimeter. Inside the circle is a symbol that resembles a stylized caduceus, with three lines representing snakes intertwined around a staff.

Public Health Service

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

MAR 8 - 2005

Ms. Tracy Bickel Johnson, RAC Regulatory Associate Biomet Manufacturing Corp. 56 East Bell Drive P.O. Box 587 Warsaw, Indiana 46581-0587

Re: K042051

Trade Name: ArComXL™ Polyethylene Liners -Regulation Number: 21 CFR 888.3350, 21 CFR 888.3358 Regulation Name: Hip joint metal/polymer semi-constrained cemented prosthesis, Hip joint metal/polymer/metal semi-constrained porous-coated uncemented prosthesis Regulatory Class: II

Product Code: JDI, LPH Dated: December 6, 2004 Received: December 8, 2004

Dear Ms. Johnson:

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.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it 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 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

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# Page 2 - Ms. Tracy Bickel Johnson, RAC

CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set Of It 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.

This letter will allow you to begin marketing your device as described in your Section 510(k) I mb loter vill and wy of substantial equivalence of your device of your device to a legally premaince hodicate 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 n you attire office of Compliance at [phone]. Also, please note the regulation entitled, "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 other Economic 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 yours,

Muriaml Provert

Miriam Provost, Ph.D. Acting Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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# Indications for Use

510(k) Number (if known): K042051

Device Name: ArComXL™ Polyethylene Liners

### Indications For Use:

- 1) Noninflammatory degenerative joint disease including osteoarthritis and avascular necrosis.
- 2) Rheumatoid arthritis.
- 3) Correction of functional deformity.
- 4) Treatment of non-union, femoral neck fracture, and trochanteric fractures of the proximal femur with head involvement, unmanageable using other techniques.
- 5) Revision of previously failed total hip arthroplasty.

Cemented and Uncemented Applications

Prescription Use _____________________________________________________________________________________________________________________________________________________________ (Part 21 CFR 801 Subpart D)

AND/OR

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)

Mariam C. Parrott

(Division Sign-6 Division of General, Restorative, and Neurological Devices

Page 1 of 3

510(k) Number K072051

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# Claim Statements:

## Hip Simulator Wear

The Biomet ArComXL™ polyethylene acetabular inserts (Part No.: XL-105933) tested are lsostatically compression molded highly crosslinked components (50kGy gamma irradlated under argon) that are sterilized in alr by either gas plasma or ethylene oxide. ArComXL™ was compared to Identical predicate polyethylene liners (Part No .: 12-105893) that were machined from isostatically molded polyethylene that was subsequently gamma sterlilized (25-40kGy) in argon, A side by side hip simulator wear test of the two materials showed a 47% reduction In the volumetric wear rate (34.9 opposed to 65,8 mm²/10° cycles) for ArComXL™ (EtO sterilized) when compared to the predicate device. All inserts in this study mate with either a 50 or 52mm acetabular shell, have a standard rim, a 32 mm inner diameter, and a 4.75 mm bearing thickness. Testing was performed under multiaxial hip Joint simulation for five (5) million cycles, using a Paul Hip load profile with a maximum load of 2.4kN, 32 mm CoCr articulating heads, and a bovine calf serum lubricant. The results of in vitro hip wear simulator tests have not been shown to quantitatively predict clinical wear performance.

### Abrasiye Hip Simulator Wear

The Blomet ArComXL™ polyethylene acetabular inserts (Part No .: XL-105933) tested are Isostatically compression molded highly crosslinked components (50kGy gamma irradiated under argon) that are sterilized in air by either gas plasma or ethylene oxide. ArComXL™ was compared to identical predicate polyethylene liners (Part No .: 12-105893) that were machined from isostatically molded polyethylene that was subsequently gamma sterlized (25-40kGy) in argon. After 5 million cycles of hip simulator wear with no additives, bone cement particulate was added to simulate abrasive conditions for two (2) million cycles. Under abrasive conditions, the Blomet. ArComXL™ (EtO sterllized) polyethylene acetabular insert (Part No.: XL-105933) showed a 64% reduction in volumetric wear rate (109.8 opposed to 309.0 mm²/10° cycles) when compared to the same acetabular inserts fabricated from the predicate polyethylene (Part No.; 12-105893). These inserts mate with either a 50 or 52mm acetabular shell, have a standard rim, a 32mm Inner diameter, and a 4.75 mm bearing thickness. Testing was performed under multlaxial hip joint simulation for two (2) million cycles, using a Paul Hip load profile with a maxlmum foad of 2.4kN, 32 mm CoCr articulating heads, and bovine calf serum lubricant. The results of in vitro hip wear simulator tests have not been shown to quantitatively predict clinical wear performance.

## Free Radicals

The Blomet ArComXL™ polyethylene material tested is isostatically compression molded, highly crosslinked (50kGy gamma irradiated under argon), and sterilized in air by either gas plasma or ethylene oxide. ArComXL™ was compared to predicate polyethylene material that was machined from isostatically molded polyethylene that was subsequently gamma sterflized (25-40kGy) in argon. The Blomet ArComXL™ (Gas Plasma sterilized) material, showed a 94% reduction in the number of free radicals (0.22x1055 compared to 3.82x1015 spins/g) versus the predicate polyethylene material. Testing was performed by an Independent laboratory using Electron Spin Resonance (ESR). Results of In vitro free radical testing have not been shown to quantitatively predict oxidation resistance.

### Oxidative Stablilty

The Biomet ArComXL™ polyethylene material tested is isostatically compression molded, highly crosslinked (50kGy gamma irradiated under argon), and sterilized in air by elther gas plasma or ethylene oxide. ArComXL™ was compared to predicate polyethylene material that was machined from isostatically molded polyethylene that was subsequently gamma sterilized (25-40KGy) In argon. The Biomet ArComXL™ (Gas Plasma sterllized) material did not show any measurable Page 2 of 3

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oxidation by FTIR (oxidation index less than 0.4 throughout the sample) after accelerated aging per ASTM F2003-00, which is designed to simulate several years of shelf-aging in alr. In contrast, when the predicate material was removed from inert packaging that was vacuum sealed after purging with argon), it did show measurable levels of oxIdation after accelerated aging (oxidation Index was greater than 1.1 at a depth of 1 mm), Further, after accelerated aging the average ultimate load for all three ArComXL™ axes (Gas Plasma Sterilized) remalned higher than the peak load (31% higher; 91.8N vs. 70.2N); whereas the ultimate load for the isotropic predicate material was significantly less than the peak load (44% lower; 42.6N vs. 75.6N) as measured by small punch testing, ASTM F2183-02.

#### Mechanical Strength

The Biomet ArComXL To polyethylene material tested is isostatically compression molded, highly crosslinked (50kGy gamma irradlated under argon), and sterilized in air by either gas plasma or ethylene oxide. ArComXL™ was compared to predicate polyethylene material that was machined from isostatically molded polyethylene that was subsequently gamma sterilized (25-40KGy) in argon. The Biomet ArComXL™ (EtO sterilized) material showed a 30% increase in ultimate tensile strength (from 47 MPa) in the longitudinal axis versus the predicate polyethylene material. The tensile testing was performed per ASTM standard D638-02a using Type 5 tensile specimens.