Longer Edentulous Spans Reduce Scanner Accuracy in Full-Arch Digital Workflows: Study

This loss of accuracy could lead to errors in prosthesis fit, necessitating additional adjustments or remakes. The study underscores that the choice of IOS is critical when working with patients who present with extensive edentulous spaces, as not all scanners perform equally well in such challenging situations. While the digital workflow has transformed prosthodontics with improved efficiency and patient comfort, the findings highlight the need for clinicians to carefully select scanners that maintain reliable performance across different clinical scenarios.

Inaccuracies over long spans can result from stitching errors during image acquisition, limited reference points in edentulous areas, and cumulative deviation across the arch. The researchers suggest using scanners with documented high trueness and precision or combining digital impressions with alternative methods, such as photogrammetry or verification jigs, for enhanced accuracy in full-arch rehabilitations.

Additionally, they note the importance of following manufacturer guidelines for scanning strategies and ensuring proper operator training. These steps can help mitigate potential errors and improve final prosthesis fit. The study emphasizes that although IOS technology continues to evolve rapidly, clinicians must be aware of its current limitations and apply best practices to achieve optimal outcomes. Future studies are expected to evaluate how advancements in scanning software and hardware might overcome the challenges posed by long edentulous spans in fully digital workflows.