The monitor’s betrayal: why your phygital workflow still needs physics (and chemistry)

You know that feeling of completeness and satisfaction when you look at a perfect 3D rendering?
On the monitor, at 30x magnification, the margins are flawless, no gaps, and the occlusion seems written in the stars. Yet sometimes, the in-mouth trial brings us abruptly back to earth.

This happens because the efficiency of your phygital workflow in dentistry depends not only on the power of the software, but on the quality of the “state transition” between atom and pixel, between the physical world and the digital one. If the physical matter is not prepared correctly, the digital layer accumulates errors upon errors that no algorithm can correct (for now!)

The practice-laboratory synergy: beyond the “do and redo”

The success of a restoration is a chess match played between the Practice and the Laboratory. A few months ago we explored the anti-do-and-redo protocol with a focus on the clinical side; today we take it a step further.

The digital dentist-dental technician collaboration, today, cannot be merely an exchange of STL files; it is the sharing of physical standards. When the technician receives a scan, they must be certain that what they see is reality, not an optical interpretation distorted by reflections or moisture. Optimizing this interface is the secret to reducing stress for both professionals.

Surface optimization: the secret to posthetic precision

Why do scanner reading errors on plaster models occur so often? It’s a matter of physics.

The physics is simple: scanner light bounces off shiny or translucent surfaces, creating artifacts on the sensors.

And how can we “shape” physics so it no longer works against our intentions and expectations? With a little preparation, a few specific products, and a few minutes dedicated to this step.

1. Lights

To achieve consistent analog-digital prosthetic precision, the model (or the abutment) must be “seen” correctly. Opacification remains the best way to avoid artifacts and achieve clean scans.

• Tip from the Larident Team: Before every extraoral scan, apply an ultra-light spray to even out the reflection. Less optical “noise” means fewer minutes lost at the CAD and zero touch-ups at the bench.

2. Shadows

The scanner, unlike traditional impression paste, is an optical eye: what it cannot see, it cannot reconstruct. If the preparation margin is partially submerged or covered by gingival collapse, the software will create an interpolation (i.e., it will “guess”), inevitably leading to misfit.

• Tip from the Larident Team: Using a double retraction cord or hemostatic paste helps you clearly see the margin with the naked eye before passing the handpiece. If you can’t see it, neither can the scanner.

3.  Surface tensions and perfect castings

Even in the transition to the physical artifact, matter can work against you. Wax and investment speak different chemical languages (water-repellency vs. water).

• Tip from the Larident Team: Using a wetting agent that creates a molecular bridge between these two worlds eliminates the risk of bubbles and imprecisions. It’s a small gesture that stabilizes the entire production process.

4. Fluid control

Saliva and fluids are not only enemies of adhesion but also of geometry. For the scanner, a drop of saliva on a margin is not transparent — it has physical volume. The software will read it as part of the tooth, creating a non-existent “bump” that will prevent the crown from seating.

• Tip from the Larident Team: Strict isolation. Before scanning, use cotton rolls and compressed air to dry every single droplet. The goal is a “matte” (opaque) and dry surface, where light can reflect consistently.

5. Ambient light pollution

This is a point that is often overlooked: ultra-powerful dental lights or direct sunlight entering through the practice windows can “wash out” the structured light pattern projected by the scanner. This generates “holes” in the digital mesh or dramatically slows down the software as it struggles to distinguish its own signal from ambient light.

• Tip from the Larident Team: Dim the lights. During intraoral scanning, turn off or move away the dental unit light. The scanner works best in controlled low light, where its light is the only player. It’s a small adjustment that reduces sensor stress and, by extension, your own.

The plaster model is still a cinical and legal record

We have cloud archives for every aspect of our digital lives, yet even today, the master plaster model remains an “irrefutable truth”. Clinically, it allows you to verify the fit in a controlled analog environment. Legally, in the event of a dispute, it is your incontestable physical proof — provided it is properly preserved.

• Tip from the Larident Team: Treat models with sealants that harden the surface without creating a film. A model that does not absorb dirt or moisture is a health record that protects your professional standing for years to come.

Generational perspectives: acommon goal

Regardless of your age and your “style,” a professional’s mental well-being depends on the predictability of results. Working better means living better.

Don’t let physics decide the quality of your work. The synergy between your experience and the right chemical allies is what transforms a stressful day into a satisfying one.

Want to find out how to optimize your phygital steps and drastically reduce remakes?

We’ve left some useful products for you here!

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FAQ: Phygital Workflow Dentistry