Long distances between reference points
Between implants, there may be sections with few unambiguous geometric features. The scanner must stitch the partial record across a greater distance.
Technical guide · digital full-arch scanning
How to identify an error before it reaches the definitive restoration.
From full-arch scan to the physical restorationIPD Solutions Map · clinic ↔ laboratoryOne clinical pathway connects the Multi-Unit abutment (MUA) platform, ScanLogiQ, AssistLogiQ, Scan Transfer and clinical passive-fit verification. This is not a component catalogue, but an overview of decision and control steps in digital full-arch scanning.
Live technical discussion · 27 NovemberDigitally to the Perfect Result · Žďár nad Sázavou
Inside ScanLogiQ. Explore the full-arch workflow down to the data coordinates.
Stitching drift, four independent Scan Flag iQ acquisitions, Data Sets 1–3, AssistLogiQ, 6DoF and the limits of digital validation. Matouš Záhorec, a professional trainer with extensive experience in CAD/CAM technologies and implant prosthodontics, will add a clinical-laboratory perspective to the live discussion.
A GOOD-LOOKING STL ≠ PROOF OF ACCURACY4× SCAN FLAG iQASSISTLOGIQ6DoFKILL THE WORKFLOW
Why discrepancies occur
Full-arch scanning is more demanding than recording a single implant
In an extensive implant-supported restoration, the intraoral scanner must connect multiple distant reference points into one spatial whole. The longer the scan path and the fewer stable references available to the software, the more important it becomes to verify the data repeatedly.
Arch curvature and mobile tissues
Soft tissues, saliva, reflections and pronounced curvature make stable acquisition more difficult, especially in distal areas and locations with poorer visibility.
Accumulation of deviations while stitching the 3D image
Small local inaccuracies can accumulate as successive captures are stitched together. The resulting model may still look smooth and convincing on screen.
Trueness and repeatability are not the same thing
Trueness describes how close the record is to the true position. Repeatability (precision) describes whether repeated scans produce a similar result. ScanLogiQ works with repeated acquisitions precisely so that data that look good but are not mutually consistent can be identified.
Guide map
The complete case as a controlled chain of clinical and data steps
Each phase answers a different question. If a control point is missing, a discrepancy can pass through to the definitive restoration. The workflow is therefore divided into clear verification checkpoints.
Platform
MUA creates a common working level for full-arch restorations
Implant-level connections differ between systems. A Multi-Unit abutment (MUA) creates a common prosthetic level above the implants, allowing scanning, framework design and communication with the laboratory to be standardised.
MUA ClassicMUA APcoronal platform Ø4.8full-arch restorations
MUA AP availability must be verified for the specific implant platform. The general principle of working at MUA level should therefore be distinguished from the availability of individual AP references.
MUA AP · anatomically shaped external profile
overall shape
profile detailAnatomical external profile
The curved MUA AP profile is designed to provide a smoother transition between the abutment and soft tissues.
TiN surface
The gold-coloured titanium nitride (TiN) surface combines an aesthetic appearance with high surface wear resistance.
Angulated variants
Angulated versions allow correction of an unfavourable implant axis and can improve access to the restoration screw channel.
ScanLogiQ
One good-looking scan is not enough. Repeatability and mutual consistency are what matter.
ScanLogiQ combines the physical Scan Flag iQ components with the AssistLogiQ platform. The aim is to record the MUA position repeatedly and identify inconsistent data before they are used to design the definitive restoration.
1
One Shot iQ
Captures the soft tissues and the initial map used to select and orient Scan Flag iQ.
2
Scan Flag iQ × 4
Four independent acquisitions make it possible to assess whether the spatial information repeats consistently.
3
AssistLogiQ evaluation
The number of mutually confirmed scans determines whether it is appropriate to proceed or repeat the acquisition.
AssistLogiQ evaluation
A result of 1–2, 3 or 4 out of 4 changes the next clinical decision
Repeating a scan when consistency is low is not a failure; it is part of quality control. Four confirmed files represent a complete ScanLogiQ validation result, although the passive fit of the definitive restoration must still be verified clinically.
| Result | Meaning of the result | Recommended action |
|---|---|---|
| 1–2 / 4 | Insufficient consistency | Repeat the scan; depending on case risk, consider a physical verification framework. |
| 3 / 4 | Minimum acceptable consistency | Add another scan or proceed according to the clinical risk and internal protocol. |
| 4 / 4 | Complete consistency across repeated acquisitions | Proceed to design and manufacture while retaining subsequent clinical passive-fit verification. |
Reverse iQ
MUA position and the shape of the functional provisional restoration are two different pieces of information
Scan Flag iQ is used to verify spatial position at MUA level. Reverse iQ can add the shape, functional relationships, occlusion and soft-tissue support from a provisional restoration, prototype or try-in. It is therefore an optional but valuable data layer in many cases.
Scan Transfer
Scan Transfer and ScanLogiQ represent two different full-arch verification strategies
Scan Transfer uses a physical reference structure and allows rigid splinting of the scan bodies. ScanLogiQ is based on repeated controlled scanning and software evaluation. Both approaches target the same problem: limiting the accumulation of deviations during intraoral scanning of a long dental arch.
CSS | continuous scanning
Connected scan bodies create a continuous reference path along which the intraoral scanner can move without large jumps between isolated points.
De|Bug | physical verification
The rigid assembly can serve as a physical validation key to verify position and mutual relationships before definitive manufacturing.
Re|Scan | combined rescanning
The simpler portion is recorded intraorally, while a difficult-to-access area can be rescanned extraorally and then accurately aligned.
Clinical verification
Digital data verification does not replace clinical passive-fit verification
After data evaluation and manufacture of the restoration, clinical verification follows. The Sheffield test and radiographic verification complement the digital workflow and confirm whether the restoration actually seats passively in the mouth.
Important: ScanLogiQ verifies the consistency of repeated digital acquisitions at MUA level. The clinical team subsequently verifies the passive fit of the definitive restoration.
Scientific resources
Scientific studies should explain accuracy, not merely claim it
For each technical claim, it is useful to state what the study actually tested, which reference method it used, what results it found, and which conclusions cannot be generalised from it.
ScanLogiQ 2026
Revilla-León et al. evaluate an uncalibrated system of scan bodies oriented towards the centre of the arch using five intraoral scanners. DOI: 10.1016/j.prosdent.2026.03.002.
CSS Strategy 2020
A published clinical protocol describes continuous scanning and rigidly connected scan bodies as a reference pathway for digital full-arch recording.
Scan Transfer 2026
The clinical description validating the principle presents the CSS, De|Bug and Re|Scan procedures. It is suitable for explaining the method, not as universal evidence for every clinical situation.
Study results must be interpreted in relation to the specific procedure tested, the reference method and the measurement conditions. Indirect rankings of different technologies cannot be presented as direct comparisons.
Check before first clinical use
Dry run: verify the entire digital workflow before the first case
Before the first clinical use, it is advisable to run through the entire workflow: intraoral-scanner setup, STL file saving, Data Set 1, four Data Set 2 scans, evaluation, optional Reverse iQ, Data Set 4 and download of the resulting working files.
intraoral-scanner setupsaving the STL fileAssistLogiQ accountbackup test dataclinical Check List
27. 11. 2026 · Žďár nad Sázavou
Inside ScanLogiQ: from the web-based guide to a live technical discussion.
At the Digitally to the Perfect Result conference, ScanLogiQ will be explored from trueness vs. precision through stitching drift, four Scan Flag iQ acquisitions and AssistLogiQ to the limits of digital validation. The planned schedule also includes an interactive “Kill the workflow” conclusion and an optional hands-on block.
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