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The Neocis Guidance System (NGS) is a computerized navigational system intended to provide assistance in both the planning (pre-operative) and the surgical (intra-operative) phases of dental implantation surgery. The system provides software to preoperatively plan dental implantation procedures and provides navigational guidance of the surgical instruments.

The Neocis Guidance System (NGS) is a stereotaxic medical device that guides surgeons during dental implant surgery. The system allows the user to plan the surgery virtually in software using a CT scan of the patient, and the plan is used by a quidance system to provide physical, visual, and audible feedback to the surgeon during the implant site preparation.

The implant process occurs in two phases. First, the dental surgeon plans the surgical procedure with the planning software. A virtual implant is placed at the desired location in the CT scan, allowing the dental surgeon to avoid interfering with critical anatomical structures during implant surgery. Second, when the implant plan is optimally positioned, the NGS provides accurate quidance of the dental surgical instruments according to the pre-operative plan.

Physical quidance is provided via the Guidance Arm. The Guidance Arm grips a standard dental drill from the back end, allowing the surgeon to grip the drill as normal. The Guidance Arm does not move unless the surgeon applies a manual force to the drill. The Guidance Arm will constrain the surgeon to drill according to the prescribed surgical plan, preventing deviation. The surgeon is constantly in control of the drilling.

Visual guidance is provided by 3D graphics and 2D cross sections that indicate the position and orientation of the drill in relation to the pre-operative plan and scan. The visual feedback is updated in real-time so any relative motion between the dental handpiece and the patient properly update the visualization.

The patient tracking portion of the NGS is comprised of the Patient Splint and the Patient Tracker. The Patient Splint is attached to the contralateral side of the patient's mouth. The Patient Splint is placed on the patient prior to the CT scan. A fiducial array with fiducial markers is placed on the Patient Splint prior to the CT scan so the virtual plan can be related to the physical space of the system. The Patient Tracker is a mechanical feedback system that is connected to the Patient Splint on the patient, which relays information to the control software in order to track patient movement. If patient movement occurs during the surgical procedure, the system will respond by altering the prescribed surgical cutting angle and position to accommodate the patient movement, which will maintain the accuracy of the drill placement.

Several steps are required for calibration and measurement during the procedure. The drill is calibrated using the Calibration Drill Bit inserted into a precise position on the Patient Tracker. During the surgery, each drill bit must be measured with the Depth Gauge to determine the proper length of the bit. These measurements complete the loop so the entire NGS is accurate to the tip of the drill.

The NGS is a supporting device, providing additional information and guidance to the decision- making process during the surgical procedure. It is not intended to replace the surgeon's judqment. The final clinical decisions are the sole responsibility of the surgeon. The surgeon can at any time during the surgical procedure modify the planned implant positions. Under no circumstances does the device relieve the surgeon of his or her ultimate clinical responsibility.

The subject device is the same as the NGS cleared under K182776 (the predicate device), except for a change to the dental drill supplier and dental drill collar design. The dental handpiece and motor have received previous 510(k) clearance under K070084 and K030163.

The splint is a key component for patient tracking for the NGS. The patient tracking portion of the NGS is comprised of the Chairside Splint and the Patient Tracker. The Chairside Splint is attached to the contralateral side of the patient's mouth. The Chairside Splint is affixed to the patient's teeth using dental materials specified in the labeling. The Chairside Splint is placed on the patient prior to the CT scan. A fiducial array with fiducial markers is placed on the Chairside Splint prior to the CT scan so the virtual plan can be related to the physical space of the system. The Patient Tracker is a mechanical feedback system that is connected to the Patient Chairside on the patient, which relays information to the control software in order to track patient movement. If patient movement occurs during the surgical procedure, the system will respond by altering the prescribed surgical cutting angle and position to accommodate the patient movement, which will maintain the accuracy of the drill placement.

The provided text describes information about the Neocis Guidance System (NGS), a computerized navigational system for dental implantation surgery. However, the document (a 510(k) premarket notification) primarily focuses on demonstrating substantial equivalence to a predicate device due to a change in dental drill supplier and collar design, rather than proving the device meets new acceptance criteria established for this specific submission.

Therefore, the information regarding acceptance criteria and study details is largely drawn from previous clearances (K173402 and K161399) as the current submission leverages prior performance testing.

Here's a breakdown of the requested information based on the provided text:

1. A table of acceptance criteria and the reported device performance

The document doesn't explicitly define "acceptance criteria" presented as a single, consolidated list with corresponding performance for the current submission (K191605). Instead, it refers to the performance characteristics of the device, which serve as criteria for substantial equivalence to the predicate. The "Prior Performance Testing" sections (K173402 and K161399) detail various verification and validation activities.

For this submission, the comparison table (Table 1) between the subject device and the predicate device outlines several technical characteristics. The implicit acceptance criterion for these is "no difference" compared to the predicate, as highlighted in the "Comments" column.

2. Sample size used for the test set and the data provenance (e.g. country of origin of the data, retrospective or prospective)

The document provides limited specific numbers for test set sample sizes and provenance:

• Total System Accuracy (K173402): Evaluated with "a typodont as simulation of a patient with three osteotomies per typodont in four locations (Upper Right / Upper Left / Lower Right / Lower Left)." This implies multiple osteotomies on each typodont, but the exact number of typodonts is not specified.
• Guidance Arm Accuracy / Repeatability (K161399): "collecting 27 data points in spaces within two work volumes (54 total points) against a calibrated CMM."
• Other tests: Descriptions like "Run through of Typical Use Case," "Testing of all potential boundary parameters," and "Simulating all error messages and pop-ups" do not provide specific numerical sample sizes.
• Data Provenance: The document does not specify the country of origin of the data or whether the studies were retrospective or prospective, beyond indicating "simulated use" on typodonts/in a simulated clinical environment.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts

• Simulated Use (End User Validation) (K173402 and K161399): Performed by "Surgeons" (K173402) and "End User" (K161399). The number of surgeons/end users and their specific qualifications (e.g., years of experience, specialization) are not specified in the provided text.

4. Adjudication method (e.g. 2+1, 3+1, none) for the test set

The document does not describe any adjudication method used for establishing ground truth in the reported tests.

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

The document refers to the Neocis Guidance System as a "computerized navigational system" and a "stereotaxic medical device that guides surgeons." It is a surgical guidance device, not an AI-powered diagnostic or interpretive tool that assists "human readers." Therefore, an MRMC comparative effectiveness study involving human readers (as typically seen in diagnostic imaging AI) is not applicable to this type of device, and no such study is mentioned. The system assists surgeons during the surgical procedure rather than enhancing their interpretation of images.

6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done

The device is designed for human-in-the-loop operation, as it "guides surgeons" and "is not intended to replace the surgeon's judgment." The reported accuracy tests (System Lateral Accuracy, System Depth Accuracy, System Angular Accuracy, Guidance Arm Accuracy / Repeatability) likely represent the standalone technical performance of the guidance system's robotic/mechanical components, separate from the surgeon's manual actions, but within the context of a simulated surgical environment where the system provides guidance. The document does not explicitly present "standalone algorithm performance" in a way that separates algorithmic output from its interaction with the mechanical guidance system.

7. The type of ground truth used (expert consensus, pathology, outcomes data, etc.)

The ground truth for the reported accuracy tests appears to be physical measurements against established benchmarks or calibrated equipment.

• Total System Accuracy (K173402): Accuracy was evaluated, implying a comparison against a known, intended plan or precise measurements on the typodont.
• Guidance Arm Accuracy / Repeatability (K161399): Evaluated "against a calibrated CMM" (Coordinate Measuring Machine), which provides highly accurate physical measurements.
• End User Calibration Verification (K161399): "Dimensional analysis and verification of Calibration Materials."

8. The sample size for the training set

The document does not provide any information regarding a training set or its sample size. This type of surgical guidance system typically relies on computational geometry, kinematics, and control theory rather than machine learning models that require labeled training data in the same way as an AI diagnostic algorithm.

9. How the ground truth for the training set was established

Since no training set is mentioned for an AI/machine learning model, this question is not applicable. The device's functionality is based on established engineering principles and calibration processes.

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