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The Sirona Dental CAD/CAM System is intended for use in partially or fully edentulous mandibles and maxillae in support of single or multiple-unit cement retained restorations. For the BH 3.0 S. SSO 3.5 L and SBL 3.3 L titanium bases, the indication is restricted to the replacement of single lateral incisors in the maxilla and lateral and central incisors in the mandible. The system consists of three major parts: TiBase. inCoris mesostructure, and CAD/CAM software. Specifically, the inCoris mesostructure and TiBase components make up a two-piece abutment which is used in conjunction with endosseous dental implants to restore the function and aesthetics in the oral cavity. The inCoris mesostructure may also be used in conjunction with the Camlog Titanium base CAD/CAM (types K2244.XXX) (K083496) in the Camlog Implant System. The CAD/CAM software is intended to design and fabricate the inCoris mesostructure. The inCoris mesostructure and TiBase two-piece abutment is compatible with the following implant systems: (list of compatible implant systems follows).

The Sirona Dental CAD/CAM System which is the subject of this premarket notification is a modification to the Sirona Dental CAD/CAM System as previously cleared under K111421. The modifications represented in the subject device consist of the implementation of a new "chairside" CAD/CAM software version, CEREC SW version 4.6.1, in which additional functionality for the control of critical CAD/CAM abutment dimensions has been added. Additionally, the modified Sirona Dental CAD/CAM System that is the subject of this premarket notification includes a line extension to the existing offerings of the Sirona TiBase titanium base component offerings. These additional TiBase variants facilitate compatibility with additional implant systems. The modified Sirona Dental CAD/CAM System which is the subject of this premarket notification consists of: CEREC SW version 4.6.1, "chairside" CAD/CAM software; CEREC AC digital acquisition unit; CEREC AC Connect digital acquisition unit; CEREC Omnicam 3D digital intraoral scanner; CEREC MCXL product family of CAM milling units; Sirona TiBase titanium base components; inCoris ZI zirconium mesostructure blocks. As subject to this premarket notification, the Sirona Dental CAD/CAM System is utilized to digitally acquire and record the topographical characteristics of teeth, dental impressions, or physical stone models in order to facilitate the computer aided design (CAD) and computer aided manufacturing (CAM) of two-piece "CAD/CAM" abutments. The patient-specific two-piece abutments consist of pre-fabricated "TiBase" components which are designed with interface geometry to facilitate compatibility and connection with currently marketed dental implant system. The CEREC SW 4.6.1 CAD/CAM software is utilized to drive the specified acquisition unit hardware to acquire the intraoral dental scans and to design the mesostructure component of the CAD/CAM abutments. Following the completion of the design, the CEREC SW 4.6.1 drives the CAM fabrication of the mesostructure component in the "chairside" workflow by utilizing the CEREC MCXL milling equipment and the defined zirconium block materials. The completed mesostructure is cemented to the TiBase component using PANAVIA F 2.0 dental cement in order to complete the finished, two-piece CAD/CAM dental abutment.

Here is the information about the acceptance criteria and the study that proves the device meets the acceptance criteria, based on the provided document:

1. Table of Acceptance Criteria and Reported Device Performance:

The document primarily focuses on demonstrating substantial equivalence to a predicate device (K111421) rather than explicitly detailing numeric acceptance criteria for each test. However, it lists the types of non-clinical performance data and states that the results support substantial equivalence. The implied acceptance criterion for all tests is "conformity" with the referenced standards or successful validation/analysis, and the reported performance is that these criteria were met.

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

The document does not explicitly state the numerical sample sizes for each specific test (e.g., number of abutments for fatigue testing, number of software test cases). It refers generally to "testing" and "analyses."

The data provenance is implied to be internal testing conducted by Dentsply Sirona, as the document details their testing efforts to support the 510(k) submission. No information about country of origin of the data is provided, nor whether it was retrospective or prospective, although typically such a submission would involve prospective testing designed to meet the specified standards.

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

This information is not provided in the document. The document describes compliance with recognized standards and internal validation processes but does not detail the involvement of external experts for establishing ground truth on a test set.

4. Adjudication Method for the Test Set:

This information is not provided. The non-clinical testing appears to rely on objective measurements against established engineering and regulatory standards rather than subjective expert adjudication of results.

5. Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study:

No MRMC comparative effectiveness study was done or reported. This device is a CAD/CAM system for designing and fabricating dental abutments, not an AI or imaging diagnostic tool that would typically involve human reader performance studies.

6. Standalone (Algorithm Only) Performance Study:

Yes, a standalone performance study in the form of non-clinical performance data and software verification and validation testing was performed. The document describes:

• Testing to verify conformity with various IEC and ISO standards for medical electrical equipment, electromagnetic compatibility, and dynamic loading.
• Compatibility analyses of new TiBase interface geometries.
• System validation testing for the CAD/CAM software's design and fabrication workflow.
• Software verification and validation testing specifically for the abutment design library to demonstrate design restrictions and locked specifications.

These tests focus on the technical performance and safety of the device components and software, independent of human clinical application for their evaluation.

7. Type of Ground Truth Used:

The ground truth used for non-clinical testing is based on:

• Engineering specifications and design requirements: For confirming the functionality and outputs of the CAD/CAM system and software.
• Recognized international standards: Such as IEC 60601-1, IEC 60601-1-2, IEC 62304, and ISO 14801 which define performance benchmarks and safety criteria.
• Original manufacturer's implant connection geometries: For compatibility analyses of TiBase interfaces.

8. Sample Size for the Training Set:

This information is not applicable and therefore not provided. The Sirona Dental CAD/CAM System, as described, is not an AI/ML-based diagnostic device that typically requires a "training set" in the context of machine learning model development. It's a system for computer-aided design and manufacturing within predetermined parameters.

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

This information is not applicable, as there is no mention or indication of a "training set" for an AI/ML model for this device. The software functions based on established CAD/CAM principles and predefined parameters rather than learning from a training dataset.

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