Painful, disabling joint disease of the hip resulting from: degenerative arthritis, rheumatoid arthritis, post-traumatic arthritis or late stage avascular necrosis.
Revision of previous unsuccessful femoral head replacement, cup arthroplasty or other procedure.
Clinical management problems where arthrodesis or alternative reconstructive techniques are less likely to achieve satisfactory results.
Correction of functional deformity.
Treatment of nonunion femoral neck and trochanteric fracture of the proximal femur with head involvement that is unmanageable using other techniques.
The device is intended for cementless use.

Device Description

The subject device designed for total hip arthroplasty includes acetabular components and femoral components. The acetabular components are composed of a highly crosslinked ultra - high - molecular - weight - polyethylene articulating bearing surface fixed in a metal shell acetabular cup, while metal shell could be fixed with acetabulum by Ti Cancellous Screw and optional screw hole cover. The femoral component is composed of a ceramic femoral head.
U-Motion II Acetabular Cup includes U-Motion II HA Cup and U-Motion II PS Cup. It is manufactured from titanium alloy forging (ASTM F620) which are forged by titanium alloy bars conforming to ASTM F136. The outer surface of U-Motion II HA Cup is coated with dual coatings, CP Ti powder (ASTM F1580) for the inner layer and HA (ASTM F1185) for the outer layer. The materials of substrate and coating layers are identical to previous cleared "UNITED" U2 Acetabular Component (K050262, K12177). The outer surface of U-Motion II PS Cup is coated with CP Ti power. There are nineteen sizes of acetabular shell available, ranging from 44 through 80 mm outer diameter in 2 mm increments. U-Motion II Cup has a snap fit locking groove for acceptance of the U-Motion II XPE Cup Liner.
Clustered-hole and multi-hole series of U-Motion II Cup have shell holes for Ti Cancellous Screw fixation to the acetabulum. Ti Cancellous Screw are self tapping and in a 6.5 mm diameter with length of 15 to 60 mm in 5 mm increments. The designs of screw are identical with the cleared screws (K050262), except for the design of screw head. This subject device also has screws and hole covers available to cover the shell holes if desired. Screw and hole covers are manufactured from Ti-6Al-4V bar (ASTM F136).
U-Motion II XPE Cup Liner is manufactured from highly crosslinked UHMWPE which conforms to ASTM F2565 and the UHMWPE raw material is in accordance with ASTM F648 and ISO 5834. The materials are identical to previous cleared "UNITED" XPE liners of U2 Hip System (K111546). U-Motion II XPE Cup Liner includes 0° and 20° hood designs, which are available in 28 mm. 32 mm. 36 mm and 40 mm inside diameter (ID), The 28 mm inserts fit the acetabular shells with outer diameter (OD) ranging from 44-80 mm, the 32 mm inserts fit the acetabular shells ranging from 48-80 mm, the 36 mm inserts fit the acetabular shells ranging from 52-80 mm, and the 40 mm inserts fit the acetabular shells ranging from 56-80 mm.
40 mm Ceramic Femoral Head - Delta is an additional size extension to the previously cleared "UNITED" Ceramic Femoral Head--Delta (K103497, K112463). The materials, design, safety and effectiveness of this subject are identical to the previously cleared device (available in sizes 28 mm, 32 mm and 36 mm), except for its larger diameter. 40 mm Ceramic Femoral Head - Delta, developed by CeramTec AG, is made from an alumina matrix composite in accordance with ISO 6474-2 and is available in -3, +1, +5 and +9 mm of neck length.
U-Motion II Cup will be used with U-Motion II XPE Cup Liner, 40 mm Ceramic Femoral Head - Delta, previously cleared 28 mm, 32 mm metal Femoral Head (K022520, K111546) and Ceramic Femoral Head (K103479, K112463) in corresponding size. This device should not be used with those of another manufacturer's hip components since the articular and dimensional compatibility cannot be assured. The 40 mm Ceramic Femoral Head may be used with UTF Stem (K110245) and the stems made of titanium alloy in U2 Hip Stem series (K003237, K062978, K111546).

AI/ML Overview

Here's a breakdown of the acceptance criteria and the study information for the U-Motion II Acetabular System, based on the provided 510(k) summary:

Acceptance Criteria and Device Performance

The provided document describes a bench performance testing approach to demonstrate the device's safety and effectiveness. The acceptance criteria are implicitly met by showing that the device is "capable of withstanding expected in vivo loading without failure" and that "there are no new issues related to the safety and effectiveness" as confirmed by these tests. The device performance is deemed satisfactory if it passes these tests.

No explicit quantitative acceptance criteria (e.g., a specific threshold for shear strength, a maximum wear rate) are provided in this summary section, nor are specific reported performance values for each test type. Instead, the document states generally that a "review of the mechanical data indicates that the U-Motion II Acetabular System is capable of withstanding expected in vivo loading without failure."

Acceptance Criteria (Implicitly Met by Passing)	Reported Device Performance
Mechanical strength and durability for modified surfaces (per ASTM F1854, F1160, F1044, F1147, F1978)	A review of the mechanical data indicates that the U-Motion II Acetabular System is capable of withstanding expected in vivo loading without failure. There are no new issues related to the safety and effectiveness of the subject devices based on these tests. (Specific quantitative results not provided in this summary).
Adequate locking strength of XPE Cup Liner (per ASTM F1820)	A review of the mechanical data indicates that the U-Motion II Acetabular System is capable of withstanding expected in vivo loading without failure. There are no new issues related to the safety and effectiveness of the subject devices based on these tests. (Specific quantitative results not provided in this summary).
Acceptable wear rate of XPE Cup Liner (per ISO 14242-1)	A review of the mechanical data indicates that the U-Motion II Acetabular System is capable of withstanding expected in vivo loading without failure. There are no new issues related to the safety and effectiveness of the subject devices based on these tests. (Specific quantitative results not provided in this summary).
Sufficient range of motion for XPE Cup Liner with femoral head (by CAD simulation)	A review of the mechanical data indicates that the U-Motion II Acetabular System is capable of withstanding expected in vivo loading without failure. There are no new issues related to the safety and effectiveness of the subject devices based on these tests. (Specific quantitative results not provided in this summary).
Durability and integrity of ceramic femoral head (burst, fatigue, rotational resistance, pull-off tests)	A review of the mechanical data indicates that the U-Motion II Acetabular System is capable of withstanding expected in vivo loading without failure. There are no new issues related to the safety and effectiveness of the subject devices based on these tests. (Specific quantitative results not provided in this summary).
Appropriate driving torque for Titanium Cancellous Bone Screw	A review of the mechanical data indicates that the U-Motion II Acetabular System is capable of withstanding expected in vivo loading without failure. There are no new issues related to the safety and effectiveness of the subject devices based on these tests. (Specific quantitative results not provided in this summary).
Material properties of XPE Cup Liner conform to standard (ASTM F2759)	A review of the mechanical data indicates that the U-Motion II Acetabular System is capable of withstanding expected in vivo loading without failure. There are no new issues related to the safety and effectiveness of the subject devices based on these tests. (Specific quantitative results not provided in this summary).

Study Details

Sample size used for the test set and the data provenance:
- Sample Size: Not explicitly stated as a numerical count of individual devices tested. The document refers to "the U-Motion II Acetabular System" and its components being evaluated against various ASTM and ISO standards for mechanical testing. These standards typically specify sample sizes for such tests.
- Data Provenance: The studies were bench tests (laboratory simulations), not clinical data from patients. The document does not specify the country of origin for the data; however, the manufacturer is in Taiwan.
Number of experts used to establish the ground truth for the test set and the qualifications of those experts:
- This question is not applicable to this type of study. For bench testing of medical devices like an acetabular system, the "ground truth" is defined by established engineering and materials science standards (ASTM, ISO), and the performance is evaluated by engineers/technicians against these predefined criteria, not by medical experts establishing a diagnostic ground truth.
Adjudication method (e.g. 2+1, 3+1, none) for the test set:
- This is not applicable as there was no expert adjudication process for this type of bench test. The results are based on objective measurements and adherence to specified test methods.
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:
- This is not applicable. This submission is for a physical orthopedic implant (hip replacement components), not a diagnostic imaging AI device. Therefore, no MRMC study was performed.
If a standalone (i.e. algorithm only without human-in-the loop performance) was done:
- This is not applicable. This is a physical device, not an algorithm. However, the bench tests performed are akin to "standalone" performance evaluations in that they assess the device's inherent mechanical properties and durability without human interaction (beyond setting up and running the tests).
The type of ground truth used (expert consensus, pathology, outcomes data, etc):
- The "ground truth" for this device's performance relies on compliance with recognized international and national standards for medical device mechanical testing (ASTM F1854, F1160, F1044, F1147, F1978, F1820, F2759, ISO 14242-1, ISO 6474-2). These standards define the acceptable mechanical properties and testing methodologies for such implants. There is no biological or diagnostic "ground truth" in this context.
The sample size for the training set:
- This is not applicable. This filing is for a physical medical device (orthopedic implant), not a machine learning or AI algorithm. Therefore, there is no "training set."
How the ground truth for the training set was established:
- This is not applicable as there is no training set for a physical medical device.

Summary

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510(k) Summary of Safety and Effectiveness

Submitted by:	United Orthopedic Corporation
Address:	No 57, Park Ave 2, Science Park, Hsinchu 300, Taiwan
Phone Number:	+886-3-5773351 ext. 2212
Fax Number:	+886-3-577156
Date of Summary:	July 13, 2012
Contact Person:	Fang-Yuan Ho
	Manager, Regulatory Affairs
Proprietary Name:	U-Motion II Acetabular System
Common Name:	Semi-constrained total hip prostheses
Device Classification	Hip joint metal/ceramic/polymer semi-constrained cemented
Name and Reference:	or nonporous uncemented prosthesis under 21CFR 888.3353This falls under the Orthopedics panel.
Device Class	Class II
Panel Code	Orthopaedics Device
Device Product Code:	LZO, LWJ, KWY, MEH
Predicate Device:	1. "UNITED" U2 Acetabular Component (K050262)
	2. "UNITED" U2 Acetabular Cup, Plasma Spray (K121777)
	3. "UNITED" U2 Hip System (K111546)
	4. "UNITED" Ceramic Femoral Head - Delta (K103497, K112463)
	5. "Corin U.S.A" Trinity Acetabular System (K093472, K103518)
	6. "Smith & Nephew" R3 Acetabular System (K061253, K070756, K092386
	7. "Smith & Nephew" BIOLOX® Delta Ceramic Femoral

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C U-Motion II Acetabular System

1. "Zimmer " Longevity® IT Highly Crosslinked Elevated Liners (K093846, K101229, K103662)
1. "Zimmer" Continuum Acetabular System-Bone Screw (K091508)

Device Description:

U-Motion II Acetabular Cup includes U-Motion II HA Cup and U-Motion II PS Cup. It is manufactured from titanium alloy forging (ASTM F620) which are forged by titanium alloy bars conforming to ASTM F136. The outer surface of U-Motion II HA Cup is coated with dual coatings, CP Ti powder (ASTM F1580) for the inner layer and HA (ASTM F1185) for the outer layer. The materials of substrate and coating layers are identical to previous cleared "UNITED" U2 Acetabular Component (K050262, K12177). The outer surface of U-Motion II PS Cup is coated with CP Ti power. There are nineteen sizes of acetabular shell available, ranging from 44 through 80 mm outer diameter in 2 mm increments. U-Motion II Cup has a snap fit locking groove for acceptance of the U-Motion II XPE Cup Liner.

Clustered-hole and multi-hole series of U-Motion II Cup have shell holes for Ti Cancellous Screw fixation to the acetabulum. Ti Cancellous Screw are self tapping and in a 6.5 mm diameter with length of 15 to 60 mm in 5 mm increments. The designs of screw are identical with the cleared screws (K050262), except for the design of screw head. This

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subject device also has screws and hole covers available to cover the shell holes if desired. Screw and hole covers are manufactured from Ti-6Al-4V bar (ASTM F136).

U-Motion II XPE Cup Liner is manufactured from highly crosslinked UHMWPE which conforms to ASTM F2565 and the UHMWPE raw material is in accordance with ASTM F648 and ISO 5834. The materials are identical to previous cleared "UNITED" XPE liners of U2 Hip System (K111546). U-Motion II XPE Cup Liner includes 0° and 20° hood designs, which are available in 28 mm. 32 mm. 36 mm and 40 mm inside diameter (ID), The 28 mm inserts fit the acetabular shells with outer diameter (OD) ranging from 44-80 mm, the 32 mm inserts fit the acetabular shells ranging from 48-80 mm, the 36 mm inserts fit the acetabular shells ranging from 52-80 mm, and the 40 mm inserts fit the acetabular shells ranging from 56-80 mm.

40 mm Ceramic Femoral Head - Delta is an additional size extension to the previously cleared "UNITED" Ceramic Femoral Head--Delta (K103497, K112463). The materials, design, safety and effectiveness of this subject are identical to the previously cleared device (available in sizes 28 mm, 32 mm and 36 mm), except for its larger diameter. 40 mm Ceramic Femoral Head - Delta, developed by CeramTec AG, is made from an alumina matrix composite in accordance with ISO 6474-2 and is available in -3, +1, +5 and +9 mm of neck length.

U-Motion II Cup will be used with U-Motion II XPE Cup Liner, 40 mm Ceramic Femoral Head - Delta, previously cleared 28 mm, 32 mm metal Femoral Head (K022520, K111546) and Ceramic Femoral Head (K103479, K112463) in corresponding size. This device should not be used with those of another manufacturer's hip components since the articular and dimensional compatibility cannot be assured. The 40 mm Ceramic Femoral Head may be used with UTF Stem (K110245) and the stems made of titanium alloy in U2 Hip Stem series (K003237, K062978, K111546).

UOC-FDA-021

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Indications for Use:

The device is used for reduction or relief of pain and/or improved hip function in skeletally mature patients with the following conditions:

1. Painful, disabling joint disease of the hip resulting from: degenerative arthritis, rheumatoid arthritis, post-traumatic arthritis or late stage avascular necrosis.
1. Revision of previous unsuccessful femoral head replacement, cup arthroplasty or other procedure.
1. Clinical management problems where arthrodesis or alternative reconstructive techniques are less likely to achieve satisfactory results.
Correction of functional deformity. 4.
1. Treatment of nonunion femoral neck and trochanteric fracture of the proximal femur with head involvement that is unmanageable using other techniques.

The device is intended for cementless use.

Basis for Substantial Equivalence:

The substantial equivalence of U-Motion II Acetabular System is based on its similarities in indications for use, design features, operational principles, and material composition to the predicate systems listed in the table below.

Current Subject	Predicate Systems	Manufacturer	SubmissionNumber	DecisionDate
U-Motion II HACup	U2 AcetabularComponentU2 Acetabular Cup,Plasma Spray	UnitedOrthopedic Co.	K050262	08/15/2005
			K121777	07/18/2012
	Trinity AcetabularSystem	Corin U.S.A.	K093472	11/23/2010
			K103518	03/09/2011

UOC-FDA-021

Page: Summary-4/7

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0 U-Motion II Acetabular System

510(k) Summary

U-Motion II PSCup	U2 AcetabularComponent	UnitedOrthopedic Co.	K050262	08/15/2005
	R3 Acetabularsystem	Smith &Nephew, INC.	K061253	05/31/2006
			K070756	06/06/2007
			K092386	11/03/2009
XPE Cup Liner	U2 Hip System	UnitedOrthopedic Co.	K111546	07/01/2011
	R3 AcetabularSystem	Smith &Nephew, INC.	K061253	05/31/2006
			K070756	06/06/2007
			K092386	11/03/2009
	Longevity® ITHighly CrosslinkedElevated Liners	Zimmer, INC.	K093846	02/04/2010
			K101229	12/03/2010
			K103662	04/15/2011
Ti CancellousScrew	U2 AcetabularComponent	UnitedOrthopedic Co.	K050262	08/15/2005
	R3 AcetabularSystem	Smith & Nephew	K061253	05/31/2006
	Continum AcetabularSystem	Zimmer, INC.	K091508	09/11/2009
40 mm CeramicFemoral Head	Ceramic FemoralHead -- Delta	UnitedOrthopedic Co.	K103497	03/04/2011
			K112463	09/23/2011
	BIOLOX®Delta CeramicFemoral Heads	Smith &Nephew, INC.	K083762	03/11/2009
			K100412	05/05/2010

Performance Test - Bench:

This 5101k) was prepared in accordance with "Class II Special Controls Guidance Document- Hip Joint Metal Polymer Constrained Cemented or Uncemented Prosthesis",

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"Guidance Document For The Preparation of Premarket Notification For Ceramic Ball Hip Systems", "510(K) Information Needed for Hydroxyapatite Coated Orthopedic Implants", and "Guidance Document for Testing Orthopedic Implants with Modified Metallic Surfaces Apposing Bone or Bone Cement". A review of the mechanical data indicates that the U-Motion II Acetabular System is capable of withstanding expected in vivo loading without failure. The following mechanical tests of the U-Motion II Acetabular System were performed:

� Evaluation of modified surface includes SEM evaluation per ASTM F1854, shear fatigue testing per ASTM F1160, static shear testing per ASTM F1044, static tensile testing per ASTM F1147, and taber abrasion resistance per ASTM F1978
Locking Strength of XPE Cup Liner per ASTM F1820
Wear Simulation Test of XPE Cup Liner per ISO 14242-1
Range of Motion for XPE Cup Liner and 28 Femoral Head with +10 mm neck length by CAD simulation
Evaluation of ceramic femoral head includes burst test, fatigue test, burst test for post-fatigue, rotational resistance test and pull-off test
Evaluation of driving torque of Titanium Cancellous Bone Screw ●
Characterize of material properties of XPE Cup Liner has been assessed in accordance with ASTM F2759.

A review of these tests has demonstrated that there are no new issues related to the safety and effectiveness of the subject devices. Clinical data was not needed to support the safety and effectiveness of the subject devices.

Conclusion

As previously noted, this Traditional 510(k) Premarket Notification is being submitted to request clearance for the U-Motion II Acetabular System. Based on the similarities to

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the predicate components and a review of the mechanical testing performed, the devices are substantially equivalent to predicate hip systems.

ﻢ

Page: Summary-7/7

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DEPARTMENT OF HEALTH & HUMAN SERVICES

Image /page/7/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a stylized eagle or bird-like symbol with three curved lines forming its body and wings. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" is arranged in a circular fashion around the symbol.

Public Health Service

Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-002

February 22, 2013

United Orthopedic Corporation % Ms. Fang-Yuan Ho No 57, Park Ave 2, Science Park Hsinchu. 300 Taiwan

Re: K122185

Trade/Device Name: U-Motion II Acetabular System Regulation Number: 21 CFR 888.3353 Regulation Name: Hip joint metal/ceramic/polymer semi-constrained cemented or nonporous uncemented prosthesis Regulatory Class: Class II Product Code: LZO, LWJ, KWY, MEH Dated: January 10, 2013 . Received: January 18, 2012

Dear Ms. Ho:

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 (reporting of medical

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Page 2 - Ms. Fang-Yuan Ho

device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set 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 go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. 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 Small Manufacturers, International and Consumer Assistance 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.

Sincerely yours,

Image /page/8/Picture/6 description: The image shows the name "Erin I.D. Keith" in a stylized font. The name is written in black ink and is easily readable. The letters are bold and have a slightly rounded appearance. The overall design is simple and modern.

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

Enclosure

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Indication for Use

510 (k) Number (if known): K122185

Device Name: U-Motion II Acetabular System

Indications for Use:

The device is used for reduction or relief of pain and/or improved hip function in skeletally mature patients with the following conditions:

1. Painful, disabling joint disease of the hip resulting from: degenerative arthritis, rheumatoid arthritis, post-traumatic arthritis or late stage avascular necrosis.
1. Revision of previous unsuccessful femoral head replacement, cup arthroplasty or other procedure.
1. Clinical management problems where arthrodesis or alternative reconstructive techniques are less likely to achieve satisfactory results.
1. Correction of functional deformity.
1. Treatment of nonunion femoral neck and trochanteric fracture of the proximal
・ femur with head involvement that is unmanageable using other techniques.

The device is intended for cementless use.

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)

Anton E. Dmitriev, PhD 00 -05'00' 16:25:10 -05'00' Page 1 of l Division of Orthopedic Devices

Regulation Number and Section

§ 888.3353 Hip joint metal/ceramic/polymer semi-constrained cemented or nonporous uncemented prosthesis.

(a)
Identification. A hip joint metal/ceramic/polymer semi-constrained cemented or nonporous uncemented prosthesis is a device intended to be implanted to replace a hip joint. This device limits translation and rotation in one or more planes via the geometry of its articulating surfaces. It has no linkage across-the-joint. The two-part femoral component consists of a femoral stem made of alloys to be fixed in the intramedullary canal of the femur by impaction with or without use of bone cement. The proximal end of the femoral stem is tapered with a surface that ensures positive locking with the spherical ceramic (aluminium oxide, A12 03 ) head of the femoral component. The acetabular component is made of ultra-high molecular weight polyethylene or ultra-high molecular weight polyethylene reinforced with nonporous metal alloys, and used with or without bone cement.(b)
Classification. Class II.