English technical abstract
A digital scan is not a single homogeneous measurement. The source article distinguishes error in the immediate vicinity of a scan body from deformation of the complete scanned arch. A scanner may capture a small object correctly while a long scan path, repeated loss of tracking and stitching of partial acquisitions introduce global displacement or torsion.
The authors therefore replace simple trust in the on-screen image with a system of verification gates. CSS Strategy is intended to simplify and stabilise acquisition, ReScan can replace a difficult section of the scan with a more accurate extraoral record, and DeBug reintroduces an independent physical check into the digital workflow. The practical goal is a passively fitting restoration, not merely a visually smooth mesh.
What the article shows
Four layers where error can hide
The article’s central practical question is simple: how was the correctness of the data verified independently of the scanning software itself?
What this means for the laboratory and clinic
- In a full-arch scan, assess not only the surface quality of individual scan bodies but also the relative distances and orientation of the complete assembly.
- Minimise scan interruptions and long jumps between areas lacking clearly readable geometry.
- For complex cases, use rigidly linked references and a verification protocol independent of the original acquisition.
- Before definitive milling, verify the passive fit of the restoration or validation element on a physical master.
The article naturally explains the role of Scan Transfer and IPD full-arch protocols. Here the product is not “just another scan body”, but a tool for stabilising the scan path, transferring implant positions and creating a physical verification point.
Limitations and cautious interpretation
Original source article
Original title: Multi-dimensionalità degli errori nelle scansioni intraorali: possiamo finalmente affermare di avere i protocolli di validazione e verifica delle nostre acquisizioni intraorali?
Authors and source: Francesco Plito, Nicola Palladino; CAD/CAM, 2/2023.
Download the original PDF
The original Italian document contains the complete text, image documentation and any bibliography included by the authors.
Related IPD pages and workflows
Glossary of technical terms
- stitching
- Stitching partial images or 3D fragments into one continuous mesh.
- mesh
- A network of points and triangular surfaces describing the scanned 3D surface.
- passive fit
- A condition in which a restoration seats without forced flexure or unwanted preload.
- full-arch
- Acquisition or reconstruction of the complete dental arch.
