The Acetabular Cup Orientation (ACO) System is intended to be used as a surgical instrument to place a visual reference k-wire alignment pin to assist in the intra-operative orientation of acetabular cup components used with total hip arthroplasty procedures. The system utilizes anatomic landmarks of the pelvis that are clearly identifiable on pre-operative CT imaging scans.

The ACO System can be used with any 510(k) cleared, legally marketed, hemispherical acetabular cup implant system for primary Total Hip Arthroplasty (THA) and its respective compatible components, with the additions listed below:

· Spherically shaped, symmetrical acetabular cups.
· Without protrusions for fixation such as spikes, threads, pegs, flanges or similar protruding elements.
· Cups with smooth outer surface or uniform coating.

· The central axis of the cup matches the direction of impaction; the inner and outer spherical surface of the cup have the same central axis.

· Cups have an apex hole to connect an impactor.
· Allowed deviations from a hemispherical cup shape (as long as the conditions stated above are fulfilled): o Cups with a very slightly flattened dome.
- o Cups with one or more holes for fixation with screws.

The ACO guides can only be used with hip systems that include reamers and impactors with straight handles.

The ACO guides can be used for posterior approach (Moore, also referred to as the 'Southern approach'), postero-lateral approach (Marcy-Fletcher), lateral approach (Hardinge) and antero-lateral approach (Watson-Jones).

The ACO guides are intended for single use only.

Device Description

The Acetabular Cup Orientation System consists of a software component, the Acetabular Cup Orientation Planner and a hardware component, the Acetabular Cup Orientation guides and is designed to assist the surgeon in the pre-op visualization and planning of the acetabular cup orientation and to assist intra-operatively in the orientation of the acetabular cup implant by placement of a visual reference pin.

The Acetabular Cup Orientation System is designed for cup orientation guidance within total hip arthroplasty surgery (THA).

AI/ML Overview

Here's an analysis of the acceptance criteria and the study that proves the device meets them, based on the provided text:

Acceptance Criteria and Device Performance

The acceptance criteria are not explicitly stated in a table format within the provided document. However, the text mentions that the "deviations between planned versus achieved orientation of the acetabular cup component were within the preset acceptance criteria." This implies that the primary acceptance criteria relate to the accuracy of the device in facilitating the planned orientation of the acetabular cup.

Since the specific numerical acceptance criteria (e.g., maximum allowable deviation in degrees) are not given, the table below will reflect this, along with the reported general performance.

Acceptance Criterion (Implicit)	Reported Device Performance
Deviation between planned and achieved acetabular cup orientation should be within predefined limits.	"The deviations between planned versus achieved orientation of the acetabular cup component were within the preset acceptance criteria."

Study Details:

Sample size used for the test set and the data provenance:
- Sample Size: "a series of cadaveric specimens" (the exact number is not specified).
- Data Provenance: Cadaveric specimens. The original country of origin for these cadavers is not mentioned in the document. This was a non-clinical study.
Number of experts used to establish the ground truth for the test set and the qualifications of those experts:
- This information is not provided in the document. The ground truth (planned orientation) was established by a pre-operative plan, presumably created by a qualified surgeon using the device's software, but the number and qualifications of experts involved in comparing this plan to the achieved orientation are not detailed.
Adjudication method (e.g., 2+1, 3+1, none) for the test set:
- This information is not provided in the document.
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 MRMC comparative effectiveness study was done. The study described is a non-clinical validation using cadavers, focusing on device accuracy rather than human reader performance. This device is described as assisting a surgeon, but the study doesn't quantify human improvement with its use.
If a standalone (i.e. algorithm only without human-in-the-loop performance) was done:
- The study described is a non-clinical test of the combination of the software (planning) and hardware (guides) on cadavers. While the software creates the plan, the "achieved orientation" depends on the physical application of the guides, which involves human interaction. Therefore, a purely "algorithm-only" performance for the entire system as intended for use was not performed; rather, the integrated system's performance was evaluated.
The type of ground truth used (expert consensus, pathology, outcomes data, etc.):
- The ground truth for the validation study was the pre-operative plan (the planned acetabular cup orientation). The "achieved orientation" on the cadaver was then compared against this plan.
The sample size for the training set:
- The document does not provide information on a separate 'training set' for the device's software component. It describes a non-clinical validation study of the device.
How the ground truth for the training set was established:
- As no information on a training set is provided, this question cannot be answered from the given text.

Summary

{0}------------------------------------------------

Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002

October 27, 2015

Materialise NV Mr. Oliver Clemens Regulatory Officer Technologielaan 15 3001 Leuven BELGIUM

Re: K150780

Trade/Device Name: Acetabular Cup Orientation System Regulation Number: 21 CFR 888.3350 Regulation Name: Hip joint metal/polymer semi-constrained cemented prosthesis Regulatory Class: Class II Product Code: PLW, JDI Dated: September 21, 2015 Received: September 24, 2015

Dear Mr. Clemens:

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 Parts 801); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set

{1}------------------------------------------------

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 yours,

Mark N. Melkerson -S

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

Enclosure

{2}------------------------------------------------

DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration

Indications for Use

510(k) Number (if known) K150780

Device Name

Acetabular Cup Orientation System

· Spherically shaped, symmetrical acetabular cups.
· Without protrusions for fixation such as spikes, threads, pegs, flanges or similar protruding elements.
· Cups with smooth outer surface or uniform coating.

· The central axis of the cup matches the direction of impaction; the inner and outer spherical surface of the cup have the same central axis.

· Cups have an apex hole to connect an impactor.
· Allowed deviations from a hemispherical cup shape (as long as the conditions stated above are fulfilled): o Cups with a very slightly flattened dome.
- o Cups with one or more holes for fixation with screws.

The ACO guides can only be used with hip systems that include reamers and impactors with straight handles.

The ACO guides are intended for single use only.

Type of Use (Select one or both, as applicable)
X Prescription Use (Part 21 CFR 801 Subpart D) Over-The-Counter Use (21 CFR 801 Subpart C)

CONTINUE ON A SEPARATE PAGE IF NEEDED.

This section applies only to requirements of the Paperwork Reduction Act of 1995.

DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW.

The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to:

Department of Health and Human Services Food and Drug Administration Office of Chief Information Officer Paperwork Reduction Act (PRA) Staff PRAStaff@fda.hhs.gov

"An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number."

{3}------------------------------------------------

510(k) Summary

Submitter information

Company name	Materialise N.V.
Establishment registration number	3003998208
Street Address	Technologielaan 15
City	Leuven
Postal code	3001
Country	Belgium
Phone number	+32 16 74 45 37
Fax number	+32 16 39 66 06
Contact name	Oliver Clemens
Contact title	Regulatory Officer
Contact e-mail address	regulatory.affairs@materialise.be

Submission date

The date of the Traditional 510(k) submission is 20 March, 2015.

Submission information

Trade Name	Acetabular Cup Orientation System
Common Name	Hip joint metal/polymer semi-constrained cementedprosthesis
Primary product codes	PLW (21 CFR 888.3350)

Predicate devices

Predicate Device
Trade or proprietary or model name	Signature™ Personalized Patient Care System – AcetabularGuide System
510(k) number	K111863
Decision date	15 June 2012
Product code	JDI
Manufacturer	Materialise N.V.

Device Information

Description of the device

{4}------------------------------------------------

orientation and to assist intra-operatively in the orientation of the acetabular cup implant by placement of a visual reference pin.

The Acetabular Cup Orientation System is designed for cup orientation guidance within total hip arthroplasty surgery (THA).

Functioning of the device

The Acetabular Cup Orientation System generates a pre-surgical plan based on medical imaging data using the Acetabular Cup Orientation Planner (software component).

The software is then used pre-operatively by a qualified surgeon to inspect, fine-tune and approve the pre-surgical plan. Next, Acetabular Cup Orientation guides are designed and manufactured based on the approved pre-surgical plan. Acetabular Cup Orientation guides are patient specific templates that transfer the pre-operatively determined pin location and the planned acetabular cup orientation to the patient intra-operatively.

Intended use

The ACO System can be used with any 510(k) cleared, legally marketed, hemispherical acetabular cup implant systems for primary Total Hip Arthroplasty (THA) and its respective compatible components, with the additional conditions listed below:

Spherically shaped, symmetrical acetabular cups.
Without protrusions for fixation such as spikes, threads, pegs, flanges or similar protruding elements.
Cups with smooth outer surface or uniform coating.
The central axis of the cup matches the direction of impaction; the inner and outer spherical surface of the cup have the same central axis.
Cups have an apex hole to connect to an impactor.
Allowed deviations from a hemispherical cup shape (as long as the conditions stated above are fulfilled):
- Cups with a very slightly flattened dome. O
- Cups with one or more holes for fixation with screws. o

{5}------------------------------------------------

The ACO guides can only be used with hip systems that include reamers and impactors with straight handles.

The ACO guides are intended for single use only.

Summarv of technological characteristics

Device comparison showed that the proposed device is substantially equivalent in intended use, materials and performance characteristics to the predicate devices.

Both subject device and predicate device are to be used as a surgical instrument to . assist the surgeon in pre-operative planning and evaluation of surgical treatment options
The guides of the subject and predicate devices are intended to assist in the intraoperative orientation of acetabular cup components
The guides of the subject and predicate devices are designed and manufactured from reconstructed three-dimensional models of the patient's anatomy
The guides of the subject and predicate devices are made of the same material and follow the same manufacturing process
The software component of the subject and predicate device are intended for use as medical device for Materialise and a surgeon for pre-surgical simulation and evaluation of surgical treatment options, which includes transferring, visualizing, measuring, annotating and editing medical data

Performance data

Non-clinical tests

Acetabular Cup Orientation Guides were validated through non-clinical studies using cadaver specimens: On a series of cadaveric specimens, Acetabular Cup Orientation guides were designed and applied according to a pre-operative plan. The planned versus achieved orientation of acetabular component were compared. The deviations between planned versus achieved orientation of the acetabular cup component were within the preset acceptance criteria.

Other tests performed: Biocompatibility test, sterilization dimensional stability test, cleaning validation test, load bench test, visible debris test, skiving prevention and packaging and shipment test were performed to assess the safety and effectiveness of the Acetabular Cup Orientation Guides. Testing verified that the accuracy and performance of the device is adequate to perform as intended.

{6}------------------------------------------------

Clinical data

Clinical testing was not performed.

Summary

The data presented in the 510(k) submission demonstrates that the subject device is substantially equivalent to the predicate device.

Regulation Number and Section

§ 888.3350 Hip joint metal/polymer semi-constrained cemented prosthesis.

(a)
Identification. A hip joint metal/polymer semi-constrained cemented 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 includes prostheses that have a femoral component made of alloys, such as cobalt-chromium-molybdenum, and an acetabular resurfacing component made of ultra-high molecular weight polyethylene and is limited to those prostheses intended for use with bone cement (§ 888.3027).(b)
Classification. Class II.