The full-arch scanning problem: drift and stitching
The source describes a known risk of extensive intraoral scans: a large number of sequential captures, a lack of rigid references and repeated interruptions can lead to spatial drift that is not apparent to the naked eye.
ScanLogiQ: convergence, continuity and repeated measurement
In the workflow described, Scan Flag iQ is intended to reduce the area that must be scanned while also creating common references. The third layer is crucial: the same reduced area is acquired four times and AssistLogiQ compares multiple independent observations of the same information. The authors frame this principle as metrological validation rather than simple redundancy.
What happens after a validated scan
After digital validation, the case continues through CAD libraries, Custom TiBase and a printed model with digital analogs. The article emphasises that errors can also arise during manufacturing, sintering, 3D printing or transfer to an articulator. It is therefore necessary to verify not only the input data but also the physical output.
The numbers belong to one specific case
In the technical section, the authors compare one “One-Shot” acquisition with the ScanLogiQ reference. In this specific case, they report a mean deviation in inter-implant distances of 193.6 µm, with six of fifteen pairs above 200 µm. These values cannot automatically be generalised to all scanners or all clinical situations, but they clearly illustrate the value of independent verification.
Main message
The passive fit of a restoration cannot simply be assumed because the “workflow is digital”. Accuracy is a property of the entire process and requires verification of the data at entry as well as verification of the physical result at exit.