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The Infinity™ OCT System is intended to provide immobilization of spinal segments as an adjunct to fusion for the following acute and chronic instabilities of the craniocervical junction, the cervical spine (C1 to C7), and the thoracic spine from T1-T3:

• Traumatic spinal fractures and/or traumatic dislocations.
• Instability or deformity.
• Failed previous fusions (e.g. pseudarthrosis).
• Tumors involving the cervical spine.
• Degenerative disease, including intractable radiculopathy, neck and/or arm pain of discogenic origin as confirmed by radiographic studies, and degenerative disease of the facets with instability.

The Infinity™ OCT System is also intended to restore the integrity of the spinal column even in the absence of fusion for a limited time in patients with advanced stage tumors involving the cervical spine in whom life expectancy is of insufficient duration to permit achievement of fusion.

The Infinity™ OCT System may be used with PASS OCT Patient Specific UNiD OCT Rods. In order to achieve additional levels of fixation, the Infinity™ OCT System may be connected to the CD Horizon™ Spinal System and VertexTM Reconstruction System rods with the Infinity™ OCT System rod connectors. Transition rods with differing diameters may also be used to connect the Infinity™ OCT System to the CD Horizon™ Spinal System. Refer to the CD Horizon™ Spinal System package insert and Vertex™ Reconstruction System package insert for a list of the indications of use.

Note: The 3.0mm multi axial screw (MAS) reguires the use of MAS Crosslink™ at each level in which the 3.0mm screw is intended to be used.

The lateral offset connectors and MAS extension connectors are intended to be used with 3.5mm and larger diameter multi axial screws. The lateral offiset connectors and MAS extension connectors are not intended to be used with 3.0mm screws.

Note: Segmental fixation is recommended for these constructs.

The PASS OCT spinal system is intended to provide immobilization of spinal segments as an adjunct to fusion for the following acute and chronic instabilities of the craniocervical junction, the cervical spine (C1 to C7) and the thoracic spine from T1-T3: traumatic spinal fractures and/or traumatic dislocations; instability or deformity; failed previous fusions (e.g., pseudarthrosis); tumors involving the cervical spine; and degenerative disease, including intractable radiculopathy and/or myelopathy, neck and/or arm pain of discogenic origin as confirmed by radiographic studies, and degenerative disease of the facets with instability. The PASS OCT spinal system is also intended to restore the integrity of the spinal column even in the absence of fusion for a limited time period in patients with advanced stage tumors involving the cervical spine in whom life expectancy is of insufficient duration to permit achievement of fusion. In order to achieve additional levels of fixation, the PASS OCT spinal system may be connected to the PASS LP spinal system with the dual diameter rods. Refer to the PASS LP spinal system package insert for a list of the PASS LP spinal system indications of use.

The Infinity™ OCT System and PASS OCT Spinal System (including UNID™ OCT Patient-Specific Rods) are posterior systems, which consist of a variety of shapes and sizes of rods, hooks, polyaxial screws, occipital plates, occipital bone screws, and connection components, which can be rigidly locked to the rod in a variety of configurations.

The implants are manufactured in titanium alloy Ti-6Al-4V ELI conforming to ISO 5832-3 specifications and ASTM F136 specifications, Cobalt-chromium molybdenum alloy Co-Cr28Mo6 according to ISO 5832-12 and ASTM F1537.

The purpose of this submission is to add titanium alloy and cobalt chrome 3.5/4.75 mm transition rods to the line of UNID™ OCT Patient-Specific Rods. The subject rods are designed and manufactured for one specific patient and are compatible with Infinity™ OCT System and PASS OCT Spinal Systems (cranially) and the CD Horizon Spinal System (caudally). The UNID™ OCT Patient-Specific Rods must be used during surgery for this patient only and must not be reused (single use only).

This document describes a spinal system, not an AI/ML device. Therefore, the requested information regarding acceptance criteria, study details for AI/ML performance, sample sizes, expert qualifications, adjudication methods, MRMC studies, standalone performance, and ground truth for AI/ML models is not applicable and cannot be extracted from the provided text.

The document pertains to the 510(k) premarket notification for the "Infinity™ OCT System and PASS OCT Spinal System," which are posterior cervical screw systems intended to provide immobilization of spinal segments. The purpose of the specific submission is to add titanium alloy and cobalt chrome 3.5/4.75 mm transition rods to the line of UNiD™ OCT Patient-Specific Rods.

The "Performance Data (Non-Clinical Test Summary)" section mentions that "Medicrea has evaluated the subject devices to demonstrate substantial equivalence to the predicate devices." The tests performed were "static and dynamic compression bending, and static torsion" per ASTM F1717, to confirm the compatibility of the caudal 4.75 mm portion of the subject rods with the CD Horizon Spinal System. This describes mechanical testing of a medical device, not a study of an AI/ML algorithm.

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