NEXUS® Hip Stem

{0} FDA U.S. FOOD & DRUG ADMINISTRATION May 15, 2025 MicroPort Orthopedics, Inc. Hunter Williams Manager, Regulatory Affairs 5677 Airline Road Arlington, Tennessee 38002 Re: K250444 Trade/Device Name: NEXUS® Hip Stem 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, MEH Dated: February 12, 2025 Received: February 14, 2025 Dear Hunter Williams: 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 (the 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 available 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. U.S. Food & Drug Administration 10903 New Hampshire Avenue Silver Spring, MD 20993 www.fda.gov {1} K250444 - Hunter Williams Page 2 Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device" (https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download). Your device is also subject to, among other requirements, the Quality System (QS) regulation (21 CFR Part 820), which includes, but is not limited to, 21 CFR 820.30, Design controls; 21 CFR 820.90, Nonconforming product; and 21 CFR 820.100, Corrective and preventive action. Please note that regardless of whether a change requires premarket review, the QS regulation requires device manufacturers to review and approve changes to device design and production (21 CFR 820.30 and 21 CFR 820.70) and document changes and approvals in the device master record (21 CFR 820.181). 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 device-related adverse events) (21 CFR Part 803) for devices or postmarketing safety reporting (21 CFR Part 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reporting-combination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050. All medical devices, including Class I and unclassified devices and combination product device constituent parts are required to be in compliance with the final Unique Device Identification System rule ("UDI Rule"). The UDI Rule requires, among other things, that a device bear a unique device identifier (UDI) on its label and package (21 CFR 801.20(a)) unless an exception or alternative applies (21 CFR 801.20(b)) and that the dates on the device label be formatted in accordance with 21 CFR 801.18. The UDI Rule (21 CFR 830.300(a) and 830.320(b)) also requires that certain information be submitted to the Global Unique Device Identification Database (GUDID) (21 CFR Part 830 Subpart E). For additional information on these requirements, please see the UDI System webpage at https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory-assistance/unique-device-identification-system-udi-system. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-devices/medical-device-safety/medical-device-reporting-mdr-how-report-medical-device-problems. For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). 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 (https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory- {2} K250444 - Hunter Williams Page 3 assistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100). Sincerely,  Limin Sun, Ph.D. Assistant Director DHT6A: Division of Joint Arthroplasty Devices OHT6: Office of Orthopedic Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health Enclosure {3} K250444 Page 1 of 1 DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration Indications for Use Form Approved: OMB No. 0910-0120 Expiration Date: 07/31/2026 See PRA Statement below. Submission Number (if known) K250444 Device Name NEXUS® Hip Stem Indications for Use (Describe) NEXUS® Hip stems are intended for use in total hip arthroplasty for reduction or relief of pain and/or improved hip function in skeletally mature patients. 1) non-inflammatory degenerative joint disease such as osteoarthritis, avascular necrosis, ankylosis, protrusio acetabuli, and painful hip dysplasia; 2) inflammatory degenerative joint disease such as rheumatoid arthritis; 3) correction of functional deformity; and, 4) revision procedures where other treatments or devices have failed Titanium plasma spray and HA coatings applied to implant surfaces are intended for uncemented arthroplasty. 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) ## 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." {4} K250444 Page 1 of 2 | 510(k) #: | 510(k) Summary | Prepared on: 2025-04-15 | | --- | --- | --- | | Contact Details | | 21 CFR 807.92(a)(1) | | Applicant Name | MicroPort Orthopedics, Inc. | | | Applicant Address | 5677 Airline Road Arlington TN 38002 United States | | | Applicant Contact Telephone | 901-451-6511 | | | Applicant Contact | Mr. Hunter Williams | | | Applicant Contact Email | hunter.williams@ortho.microport.com | | | Device Name | | 21 CFR 807.92(a)(2) | | Device Trade Name | NEXUS® Hip Stem | | | Common Name | Hip joint metal/ceramic/polymer semi-constrained cemented or nonporous uncemented prosthesis | | | Classification Name | Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Polymer, Cemented Or Non-Porous, Uncemented | | | Regulation Number | 888.3353 | | | Product Code(s) | LZO, MEH | | | Legally Marketed Predicate Devices | | 21 CFR 807.92(a)(3) | | Predicate # | Predicate Trade Name (Primary Predicate is listed first) | Product Code | | K200007 | PROFEMUR Gladiator Thin HA Classic Hip Stem with Collar | LZO | | K150302 | PROFEMUR Preserve Classic Stem | LZO | | K150862 | DePuy Actis DuoFix Hip Prosthesis | MEH | | K160907 | DePuy Actis DuoFix Hip Prosthesis | MEH | | K191632 | PROFEMUR TL2 Stems | LZO | | Device Description Summary | | 21 CFR 807.92(a)(4) | | The MicroPort NEXUS® Hip Stem is manufactured from titanium alloy (Ti6Al4V per ASTM F620) and includes titanium plasma sprayed coating conforming to ASTM F1580 and a hydroxyapatite (HA) coating conforming to ASTM F1185. The proximal body of the hip stem has a dual titanium and HA plasma spray coating while the distal portion of the hip stem has an HA coating. The NEXUS Hip Stem features collared and collarless options and sizes 0 through 12 with standard and high offsets. The NEXUS Hip Stem is provided sterile and is a single use device. The subject NEXUS Stems are compatible with previously cleared MicroPort femoral head and shell/liner components. | | | | Intended Use/Indications for Use | | 21 CFR 807.92(a)(5) | | NEXUS® Hip stems are intended for use in total hip arthroplasty for reduction or relief of pain and/or improved hip function in skeletally mature patients. | | | {5} K250444 Page 2 of 2 1) non-inflammatory degenerative joint disease such as osteoarthritis, avascular necrosis, ankylosis, protrusio acetabuli, and painful hip dysplasia; 2) inflammatory degenerative joint disease such as rheumatoid arthritis; 3) correction of functional deformity; and, 4) revision procedures where other treatments or devices have failed Titanium plasma spray and HA coatings applied to implant surfaces are intended for uncemented arthroplasty. **Indications for Use Comparison** 21 CFR 807.92(a)(5) The indications for use are the same for the subject and primary predicate devices. **Technological Comparison** 21 CFR 807.92(a)(6) The subject device shares the same material and chemical composition as the primary predicate device, with the same principle of operation. The subject device has the same shape, size range, collar variants, neck lengths and offsets with the same femoral head connection as some or all of the predicate devices and is therefore substantially equivalent. **Non-Clinical and/or Clinical Tests Summary & Conclusions** 21 CFR 807.92(b) - Range of Motion (ROM) Analysis per ISO 21535:2023 + A1:2016 - Proximal Fatigue per ISO 7206-6 - Distal Fatigue per ISO 7206-4. - Impingement Performance Analysis per ASTM F2582-20 - Magnetic Resonance Testing and Analysis per ASTM F2182-19 and FDA Guidance for "Assessment of Radiofrequency-Induced Heating in the Magnetic Resonance (MR) Environment for Multi-Configuration Passive Medical Devices" issued March 2016, ASTM F2052-21, ASTM F2119-07 (reapproved 2013). Not Applicable. Clinical data were not necessary for this device. Each test met the applicable acceptance criteria and the NEXUS Stem was found to be substantially equivalent to its predicate devices. The NEXUS Stem is therefore expected to be safe, effective and perform as well or superior to its predicates.