SHORT ANSWER
Most often with a digital scanner: it is comfortable and doesn't trigger the gag reflex. But sometimes the doctor needs a traditional silicone or alginate impression, so the clinic offers both methods.
1How the scanner works
An intraoral scanner captures the teeth and instantly creates a digital 3D model of them. No tray with impression material and no unpleasant feeling in the mouth.
2Who the scanner suits best
Patients with a strong gag reflex: a traditional impression can be hard for them to tolerate, while scanning is much easier.
3So why are impressions still needed
There are clinical situations where the doctor needs a traditional silicone or alginate impression. So we don't choose technology on a "new instead of old" basis.
We use the digital scanner and traditional impressions where each method genuinely suits the task.
4What impressions are taken for
- Diagnostics and treatment planning
- Bite correction
- Prosthetics: crowns, veneers, inlays
- Making other dental restorations