KHEIRON® Spinal Fixation System, including patient specific K-ROD

K251804 · S.M.A.I.O · NKB · Jul 8, 2025 · Orthopedic

Device Facts

• Record ID: K251804
• Device Name: KHEIRON® Spinal Fixation System, including patient specific K-ROD
• Applicant: S.M.A.I.O
• Product Code: NKB · Orthopedic
• Decision Date: Jul 8, 2025
• Decision: SESE
• Submission Type: Special
• Regulation: 21 CFR 888.3070
• Device Class: Class 2
• Attributes: Therapeutic, Pediatric

Intended Use

KHEIRON® Spinal Fixation System including patient specific K-ROD is intended to provide immobilization and stabilization of spinal segments in skeletally mature patients as an adjunct to fusion in the treatment of the following acute and chronic instabilities or deformities of thoracic, lumbar, and sacral spine: degenerative disc disease (defined as back pain of discogenic origin with degeneration of the disc confirmed by history and radiographic studies), degenerative spondylolisthesis with objective evidence of neurological impairment, fracture, dislocation, deformities or curvatures (i.e. scoliosis, kyphosis, and/or lordosis), spinal stenosis, spinal tumor, pseudarthrosis and failed previous fusion. When used for posterior, non-cervical, pedicle screw fixation in pediatric patients, KHEIRON® Spinal Fixation System including patient specific K-ROD is indicated as an adjunct to fusion to treat progressive spinal deformities (i.e., scoliosis, kyphosis, or lordosis) including idiopathic scoliosis, neuromuscular scoliosis, and congenital scoliosis. Additionally, KHEIRON® Spinal Fixation System including patient specific K-ROD is intended to treat pediatric patients diagnosed with spondylolisthesis/spondylolysis, fracture caused by tumor and/or trauma, pseudarthrosis, and/or failed previous fusion. This system is intended to be used with autograft and/or allograft. Pediatric pedicle screw fixation is limited to a posterior approach. Patient specific K-ROD devices are compatible with NuVasive Reline System components and Seaspine Mariner System components that are compatible with ø5.5mm and/or ø6.0mm rods as well as screws ø4.5mm or larger and at least 25mm in length.

Device Story

KHEIRON Spinal Fixation System provides spinal stabilization via patient-specific K-ROD rods; used as adjunct to fusion. System components include pedicle screws, hooks, and rods. Device implanted by surgeons in clinical settings to correct spinal instabilities or deformities. Patient-specific rods manufactured from Ti-6Al-4V ELI; designed to interface with compatible pedicle screw systems (NuVasive Reline, Seaspine Mariner). Output is mechanical stabilization of spinal segments; aids in maintaining spinal alignment until fusion occurs. Benefits include correction of spinal curvature and stabilization of unstable segments.

Clinical Evidence

Bench testing only. Mechanical verification and validation performed per ASTM F1717 (dynamic compression bending, static torsion) and ASTM F1798 (static axial and torsional gripping capacity). Results demonstrate compatibility with Seaspine Mariner System components and equivalence to predicate performance.

Technological Characteristics

Material: Ti-6Al-4V ELI (ASTM F136). Rod diameters: 5.5mm and 6.0mm. Mechanical fixation via pedicle screws and rods. Compatible with Seaspine Mariner and NuVasive Reline systems. No software or energy source.

Indications for Use

Indicated for skeletally mature and pediatric patients requiring spinal immobilization/stabilization as adjunct to fusion. Treats degenerative disc disease, spondylolisthesis, fractures, dislocations, spinal deformities (scoliosis, kyphosis, lordosis), stenosis, tumors, pseudarthrosis, and failed fusion. Pediatric use limited to posterior approach for progressive deformities, spondylolysis, and trauma-related fractures.

Regulatory Classification

Identification

(1) Rigid pedicle screw systems are comprised of multiple components, made from a variety of materials that allow the surgeon to build an implant system to fit the patient's anatomical and physiological requirements. Such a spinal implant assembly consists of a combination of screws, longitudinal members (e.g., plates, rods including dual diameter rods, plate/rod combinations), transverse or cross connectors, and interconnection mechanisms (e.g., rod-to-rod connectors, offset connectors).(2) Semi-rigid systems are defined as systems that contain one or more of the following features (including but not limited to): Non-uniform longitudinal elements, or features that allow more motion or flexibility compared to rigid systems.

Special Controls

*Classification.* (1) Class II (special controls), when intended to provide immobilization and stabilization of spinal segments in skeletally mature patients as an adjunct to fusion in the treatment of the following acute and chronic instabilities or deformities of the thoracic, lumbar, and sacral spine: severe spondylolisthesis (grades 3 and 4) of the L5-S1 vertebra; degenerative spondylolisthesis with objective evidence of neurologic impairment; fracture; dislocation; scoliosis; kyphosis; spinal tumor; and failed previous fusion (pseudarthrosis). These pedicle screw spinal systems must comply with the following special controls:(i) Compliance with material standards; (ii) Compliance with mechanical testing standards; (iii) Compliance with biocompatibility standards; and (iv) Labeling that contains these two statements in addition to other appropriate labeling information: “Warning: The safety and effectiveness of pedicle screw spinal systems have been established only for spinal conditions with significant mechanical instability or deformity requiring fusion with instrumentation. These conditions are significant mechanical instability or deformity of the thoracic, lumbar, and sacral spine secondary to severe spondylolisthesis (grades 3 and 4) of the L5-S1 vertebra, degenerative spondylolisthesis with objective evidence of neurologic impairment, fracture, dislocation, scoliosis, kyphosis, spinal tumor, and failed previous fusion (pseudarthrosis). The safety and effectiveness of these devices for any other conditions are unknown.” “Precaution: The implantation of pedicle screw spinal systems should be performed only by experienced spinal surgeons with specific training in the use of this pedicle screw spinal system because this is a technically demanding procedure presenting a risk of serious injury to the patient.” (2) Class II (special controls), when a rigid pedicle screw system is intended to provide immobilization and stabilization of spinal segments in the thoracic, lumbar, and sacral spine as an adjunct to fusion in the treatment of degenerative disc disease and spondylolisthesis other than either severe spondylolisthesis (grades 3 and 4) at L5-S1 or degenerative spondylolisthesis with objective evidence of neurologic impairment. These pedicle screw systems must comply with the following special controls: (i) The design characteristics of the device, including engineering schematics, must ensure that the geometry and material composition are consistent with the intended use. (ii) Non-clinical performance testing must demonstrate the mechanical function and durability of the implant. (iii) Device components must be demonstrated to be biocompatible. (iv) Validation testing must demonstrate the cleanliness and sterility of, or the ability to clean and sterilize, the device components and device-specific instruments. (v) Labeling must include the following: (A) A clear description of the technological features of the device including identification of device materials and the principles of device operation; (B) Intended use and indications for use, including levels of fixation; (C) Identification of magnetic resonance (MR) compatibility status; (D) Cleaning and sterilization instructions for devices and instruments that are provided non-sterile to the end user; and (E) Detailed instructions of each surgical step, including device removal. (3) Class II (special controls), when a semi-rigid system is intended to provide immobilization and stabilization of spinal segments in the thoracic, lumbar, and sacral spine as an adjunct to fusion for any indication. In addition to complying with the special controls in paragraphs (b)(2)(i) through (v) of this section, these pedicle screw systems must comply with the following special controls: (i) Demonstration that clinical performance characteristics of the device support the intended use of the product, including assessment of fusion compared to a clinically acceptable fusion rate. (ii) Semi-rigid systems marketed prior to the effective date of this reclassification must submit an amendment to their previously cleared premarket notification (510(k)) demonstrating compliance with the special controls in paragraphs (b)(2)(i) through (v) and paragraph (b)(3)(i) of this section.

Predicate Devices

• KHEIRON® Spinal Fixation System (K211981, K232650)
• Seaspine Mariner System (K222110)

Reference Devices

• NuVasive Reline System

Submission Summary (Full Text)

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FDA U.S. FOOD & DRUG ADMINISTRATION

July 8, 2025

S.M.A.I.O
% Robert A. Poggie
President
BioVera, Inc.
65 Promenade Saint Louis
Notre-Dame-de-L'Ile-Perrot, QC J7W3J6
Canada

Re: K251804
Trade/Device Name: KHEIRON® Spinal Fixation System, including patient specific K-ROD
Regulation Number: 21 CFR 888.3070
Regulation Name: Thoracolumbosacral Pedicle Screw System
Regulatory Class: Class II
Product Code: NKB, KWP
Dated: June 10, 2025
Received: June 12, 2025

Dear Robert A. Poggie:

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.

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"

U.S. Food & Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993
www.fda.gov

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(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-assistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email ([e-mail]) or phone [phone] or 301-796-7100).

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Sincerely,

Colin
O'neill -S

Colin O'Neill, M.B.E.
Assistant Director
DHT6B: Division of Spinal Devices
OHT6: Office of Orthopedic Devices
Office of Product Evaluation and Quality
Center for Devices and Radiological Health

Enclosure

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DEPARTMENT OF HEALTH AND HUMAN SERVICES
Food and Drug Administration
Indications for Use
Form Approved: OMB No. 0910-0120
Expiration Date: 06/30/2020
See PRA Statement below.

510(k) Number (if known)
K251804

Device Name
KHEIRON® Spinal Fixation System including patient specific K-ROD

Indications for Use (Describe)
KHEIRON® Spinal Fixation System including patient specific K-ROD is intended to provide immobilization and stabilization of spinal segments in skeletally mature patients as an adjunct to fusion in the treatment of the following acute and chronic instabilities or deformities of thoracic, lumbar, and sacral spine: degenerative disc disease (defined as back pain of discogenic origin with degeneration of the disc confirmed by history and radiographic studies), degenerative spondylolisthesis with objective evidence of neurological impairment, fracture, dislocation, deformities or curvatures (i.e. scoliosis, kyphosis, and/or lordosis), spinal stenosis, spinal tumor, pseudarthrosis and failed previous fusion.

When used for posterior, non-cervical, pedicle screw fixation in pediatric patients, KHEIRON® Spinal Fixation System including patient specific K-ROD is indicated as an adjunct to fusion to treat progressive spinal deformities (i.e., scoliosis, kyphosis, or lordosis) including idiopathic scoliosis, neuromuscular scoliosis, and congenital scoliosis. Additionally, KHEIRON® Spinal Fixation System including patient specific K-ROD is intended to treat pediatric patients diagnosed with spondylolisthesis/spondylolysis, fracture caused by tumor and/or trauma, pseudarthrosis, and/or failed previous fusion.

This system is intended to be used with autograft and/or allograft.

Pediatric pedicle screw fixation is limited to a posterior approach.

Patient specific K-ROD devices are compatible with NuVasive Reline System components and Seaspine Mariner System components that are compatible with ø5.5mm and/or ø6.0mm rods as well as screws ø4.5mm or larger and at least 25mm in length.

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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K251804
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Special 510(k) Device Modification, K251804
KHEIRON® Spinal Fixation System including patient specific K-ROD

In accordance with 21 CFR 807.92 of the Federal Code of Regulations, the following is a summary of safety and effectiveness of the KHEIRON® Spinal Fixation System, including patient specific K-ROD, and compatibility with Seaspine's Mariner System.

A. SUBMITTERS INFORMATION

Submitter Name: BioVera, Inc.
Submitter Address: 65 Promenade Saint-Louis, NDIP, Québec, J7W 3J6, CANADA
Contact Person: Robert A. Poggie, PhD
Phone Number: 514-349-7226
Date of Submission: July 8, 2025

B. DEVICE IDENTIFICATION & MANUFACTURER

Manufacturer Name: S.M.A.I.O
Manufacturer Address: 2 place Berthe Morisot - Parc Technologique 69800 Saint Priest - FRANCE
Registration Number: 3015383864
Contact Name: Jean-Charles ROUSSOULY
Title: Deputy CEO
Device Trade Name: KHEIRON® Spinal Fixation System, including patient specific K-ROD
Regulation Name: Thoracolumbosacral Pedicle Screw System
Regulation Numbers: 21 CFR 888.3070, 21 CFR 888.3050
Classification Codes: Primary code: NKB Additional code: KWP
Classification Panel: Orthopedic

C1. PRIMARY PREDICATE DEVICE
K211981, K232650
KHEIRON® Spinal Fixation System

C2. ADDITIONAL PREDICATE DEVICE
K222110
Seaspine Mariner System

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# D. DEVICE DESCRIPTION

S.M.A.I.O.'s patient specific K-ROD is part of the 510(k) cleared KHEIRON® Spinal Fixation system (K211981, K232650) designed for stabilization and correction of chronic instability or deformity of the thoracic, lumbar, and sacral spine. The patient specific K-ROD is manufactured from Ti-6Al-4V ELI per ASTM F136 and is available in diameters of 5.5 and 6.0 mm.

The Seaspine Mariner System is a 510(k) cleared pedicle screw system (K222110) that consists of a variety of screws, hooks, rods, lock screws, transverse connectors, rod-to-rod connectors, iliac connectors, and general instruments. Implant components are available in a variety of sizes and can be rigidly locked into a variety of different configurations to suit the individual pathology and anatomical conditions of the patient. The Seaspine Mariner System is designed to provide immobilization and stabilization of spinal segments as an adjunct to fusion in the treatment of acute and chronic instabilities or deformities of the posterior thoracic, lumbar, and sacral spine. The Seaspine Mariner System is also used to treat severe spondylolisthesis (Grades 3 and 4) of the L5-S1 vertebral joint in skeletally mature patients receiving fusion by autogenous bone graft.

The purpose of this Special 510(k) Device Modification is to extend indication of S.M.A.I.O.'s patient specific K-ROD (K211981, K232650) for use with the Seaspine Mariner System (K222110).

# E. INDICATIONS FOR USE

KHEIRON® Spinal Fixation System including patient specific K-ROD is intended to provide immobilization and stabilization of spinal segments in skeletally mature patients as an adjunct to fusion in the treatment of the following acute and chronic instabilities or deformities of thoracic, lumbar, and sacral spine: degenerative disc disease (defined as back pain of discogenic origin with degeneration of the disc confirmed by history and radiographic studies), degenerative spondylolisthesis with objective evidence of neurological impairment, fracture, dislocation, deformities or curvatures (i.e. scoliosis, kyphosis, and/or lordosis), spinal stenosis, spinal tumor, pseudarthrosis and failed previous fusion.

When used for posterior, non-cervical, pedicle screw fixation in pediatric patients, KHEIRON® Spinal Fixation System including patient specific K-ROD is indicated as an adjunct to fusion to treat progressive spinal deformities (i.e., scoliosis, kyphosis, or lordosis) including idiopathic scoliosis, neuromuscular scoliosis, and congenital scoliosis. Additionally, KHEIRON® Spinal Fixation System including patient specific K-ROD is intended to treat pediatric patients diagnosed with spondylolisthesis/spondylolysis, fracture caused by tumor and/or trauma, pseudarthrosis, and/or failed previous fusion.

This system is intended to be used with autograft and/or allograft.

Pediatric pedicle screw fixation is limited to a posterior approach.

Patient specific K-ROD devices are compatible with NuVasive Reline System components and Seaspine Mariner System components that are compatible with ø5.5mm and/or ø6.0mm rods as well as screws ø4.5mm or larger and at least 25mm in length.

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# F. TECHNOLOGICAL CHARACTERISTICS, COMPARISON TO PREDICATE DEVICE

The patient specific K-ROD subject device is identical to the patient specific K-ROD cleared in K211981 and K232650. The components of the Seaspine Mariner System that interface with the patient specific K-ROD are identical to those cleared in K222110. The purpose of this Special 510(k) is to present the V&V activities demonstrating that the K-ROD can be used with the Seaspine Mariner System.

**Intended Use**: K-RODs used in conjunction with the Seaspine Mariner System, and the predicate devices are intended to be used to maintain spine shape until fusion occurs.

**Indications for Use**: The indications for use statement for the primary predicate and subject devices are the same.

**Material**: K-RODs used in conjunction with the Seaspine Mariner System uses the same material as the predicates (ASTM F136 Ti-6Al-4V alloy).

**Design**: K-RODs used in conjunction with the Seaspine Mariner System and the predicate devices are substantially equivalent in shape, sizes, material, and manufacturing process.

**Strength**: K-ROD used with the Seaspine Mariner System has similar strength as the primary predicate K-ROD per verification and validation activities.

# G. PERFORMANCE DATA

Engineering analysis and mechanical testing of K-RODs used with the Seaspine Mariner System were performed to verify and validate the mechanical characteristics of the expanded use of patient specific K-RODs. The following mechanical tests were performed as part of the V&V activities:

- Dynamic compression bending – ASTM F1717
- Static torsion – ASTM F1717
- Static axial gripping capacity – ASTM F1798
- Static torsional gripping capacity – ASTM F1798

The ASTM F1717 and F1798 tests performed for V&V of K-ROD used with the Seaspine Mariner System were identical in set-up and test parameters presented in K211981 and K232650. Engineering analysis comparing K-ROD and Seaspine Mariner System's titanium alloy rods determined that a new worst-case was not created.

# H. CONCLUSIONS

The information presented in this Special 510(k) Device Modification demonstrates that the KHEIRON® Spinal Fixation System, including patient specific K-ROD, is compatible with the Seaspine Mariner System as described in this 510(k) and is substantially equivalent to the legally marketed predicate devices.