Accuracy of a novel stereophotogrammetry system for full-arch digital implant impressions: An in vitro study and clinical case

Dental implant technology plays a pivotal role in restorative dentistry, significantly enhancing both aesthetics and functional recovery for patients with tooth loss. However, traditional stereophotogrammetry approaches often involve large scan bodies, which can be unwieldy and challenging to position in full-mouth implant scenarios. These issues lead to patient discomfort and an increased risk of errors. In our paper, we build up a captured device that leverages stereophotogrammetry for capturing high-precision dental implant impressions. The design of scan body incorporates segmented annular encoding and miniature high-reflective infrared elements, effectively reducing the scan body size while improving accuracy and user experience. Additionally, a multi-scale optimization strategy for calibration parameters further refines precision. Extensive experiments have been conducted to demonstrate the accuracy of our proposed stereophotogrammetry system. •We developed a novel SGP-based device for high-precision dental implant impressions.•We proposed an annular coding strategy that enhances accuracy and minimizes scan body size.•We introduced a new calibration method for the built-up SGP system.•Extensive experiments have been conducted to demonstrate the accuracy of our proposed stereophotogrammetry system.