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The ACTIVE TM Screw Bone Screw is intended for implantation into prepared bone during orthopaedic surgery when the surgeon determines the need for additional fixation: bone reconstruction, osteotomy, arthrodesis, joint fusion, fracture repair, and fracture fixation, appropriate for the size of the device.

The ACTIVE™ Screw Bone Screw is indicated for use in bone reconstruction, osteotomy, arthrodesis, joint fusion, fracture repair, and fracture fixation, appropriate for the size of the device.

The ACTIVE ™ Screw Bone Screws subjected to this premarket notification are 4.5 mm diameter screws available in 5 mm length increments from 20 to 50 mm. The screws are manufactured from titanium alloy and have an expandable thread crest. The implants are single use only devices.

The ACTIVE ™ Screw Bone Screw consists of a screw shank in conjunction with a spiral helical thread crest component. With the spiral helical thread component, the screw has the ability to expand an additional 1 mm after implantation.

The ACTIVE TM Screw Bone Screw is made of wrought titanium 6AI-4V ELI (ASTM F136) and is available in a 4.5 mm diameter size from 20 mm to 50 mm and will be provided non-sterile, and is to be steam sterilized by the end user. Resterilization of screws upon contamination is not recommended.

The provided document describes a 510(k) premarket notification for the "ACTIVE™ Screw Bone Screw" and contains information about its performance testing. However, it does not present acceptance criteria in a quantitative, pass/fail manner with specific numerical targets. Instead, it describes general compliance with existing standards and acceptable results.

Here's a breakdown of the information based on the request:

1. Table of Acceptance Criteria and Reported Device Performance

As specific numerical acceptance criteria are not explicitly stated in the document, I will infer them from the reported testing methods and positive outcomes.

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

• Sample Size for Test Set: The document does not explicitly state the specific number of screws or tests conducted for each performance evaluation (torsion, pullout, torque in/out, bone interaction). It refers to "testing" as a general activity.
• Data Provenance: The studies were pre-clinical bench tests. The data is generated from laboratory testing of the device itself, not from human subjects or retrospective/prospective clinical data. Therefore, notions of "country of origin of the data" or "retrospective/prospective" do not apply in the typical sense; the tests were conducted by the manufacturer, Intelligent Implant Systems, LLC.

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

This question is not applicable to the type of safety and effectiveness testing described in the document. The "ground truth" for mechanical testing is established by engineering standards (e.g., ASTM F543-07) and objective physical measurements rather than expert consensus on medical images or diagnoses.

4. Adjudication Method for the Test Set

This question is not applicable. Adjudication methods like "2+1" or "3+1" are relevant for clinical studies where subjective assessments (e.g., image interpretation) require reconciliation; this document describes objective mechanical performance testing.

5. 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

This question is not applicable. The device described is a bone screw, not an AI-powered diagnostic or assistive tool for human readers. Therefore, an MRMC study or evaluation of AI assistance for human readers is irrelevant to this device.

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

This question is not applicable. The device is a physical bone screw, not an algorithm.

7. The Type of Ground Truth Used

The ground truth used for these performance tests is based on:

• Engineering Standards: Specifically, ASTM F543-07 for bone screw testing methods.
• Physical Measurements: Objective measurements of torsional strength, breaking angle, axial pullout strength, and force exerted.
• Comparative Performance to Predicate Devices: Damage from removal was compared directly to that of "traditional (predicate) bone screw[s]."

8. The Sample Size for the Training Set

This question is not applicable. As a physical medical device (bone screw), there is no "training set" in the context of machine learning or AI models. Performance is evaluated through physical testing.

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

This question is not applicable, as there is no training set for this device.

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