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The DVX 5.5 Spine System is intended for posterior, noncervical, pedicle fixation in order 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, including degenerative spondylolisthesis with objective evidence of neurologic impairment; fracture; dislocation; scoliosis; kyphosis; spinal tumor; and failed previous fusion (pseudarthrosis).

In addition, when used as a pedicle screw fixation system, the DVX Spine System is intended for skeletally mature patients with severe spondylolisthesis (Grades 3 and 4) of the L5-S1 vertebra, who are receiving fusion by autogenous bone graft having implants attached to the lumbar and sacral spine (L3 and below), with removal of the implants after the attainment of solid fusion.

The DVX 5.5 Spine System (like the predicate The DVX Spine System) consists of four or more pedicle screws and two solid rods in a symmetric. bilateral arrangement. The pedicle screws are placed axially in the pedicles with two screws in the cephalad position and two screws in the caudad position. The rods are secured in the heads of the pedicle screws so that fixed stabilization is provided between the cephalad and caudad vertebrae. Cross-links can be used if additional stabilization is necessary. The DVX5.5 Spine System ( See Figure 1) is made of components for fixation of the spine: multi-axial pedicle screws, locking cap, rod and cross-link . The materials, sterilization and packaging are the same as those in DVX Spine System, the predicate.

The provided text is a 510(k) summary for the DVX 5.5 Spinal System. It primarily focuses on demonstrating substantial equivalence to a predicate device based on mechanical testing. It does not contain information typically associated with clinical studies involving human patients or complex data analysis for acceptance criteria related to diagnostic or AI devices. Therefore, many of the requested categories (sample size, data provenance, expert ground truth, adjudication, MRMC studies, standalone performance, training set details) are not applicable to the information contained in this document.

Here's the information that can be extracted and a clear indication of what is not present:

1. Table of Acceptance Criteria and Reported Device Performance

2. Sample Size Used for the Test Set and Data Provenance

• Sample Size: Not specified in terms of number of devices tested, but the testing was for the DVX 5.5 Spine System components.
• Data Provenance: The testing was conducted for the specific device by the manufacturer (BK MEDITECH Co., Ltd.). It is a laboratory, mechanical test, not derived from patient data.

3. Number of Experts Used to Establish Ground Truth for the Test Set and Qualifications of Those Experts

• Not Applicable. Ground truth, in this context, refers to clinical or diagnostic accuracy. For a mechanical device, performance is evaluated against engineering standards (ASTM F1717-04). No human experts are used to establish "ground truth" for mechanical performance in the way they would for medical image interpretation.

4. Adjudication Method for the Test Set

• Not Applicable. Mechanical testing against an ASTM standard does not involve an adjudication method. The results are quantitative measurements interpreted against the standard's specifications.

5. If a Multi Reader Multi Case (MRMC) Comparative Effectiveness Study Was Done, and the Effect Size of How Much Human Readers Improve with AI vs without AI Assistance

• Not Applicable. This is a mechanical spinal implant. It is not an AI-assisted diagnostic or treatment device, and no MRMC studies were conducted as part of this submission.

6. If a Standalone (i.e., algorithm only without human-in-the-loop performance) Was Done

• Not Applicable. This is a mechanical device, not an algorithm, and does not involve human-in-the-loop performance.

7. The Type of Ground Truth Used

• Mechanical performance standards. Specifically, ASTM F1717-04, which outlines standard test methods for spinal implant constructs in a corpectomy model. The "ground truth" is adherence to the specified mechanical properties and performance characteristics defined by this standard.

8. The Sample Size for the Training Set

• Not Applicable. This is a mechanical device, not a machine learning model. There is no concept of a "training set" in this context.

9. How the Ground Truth for the Training Set Was Established

• Not Applicable. As there is no training set, this question is not relevant.

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