Some of it, yes — and some of it absolutely should not be. Knowing the difference protects you from the clinics that promise everything.
Crowns and veneers on prepared teeth, whitening, fillings, extractions, cleaning and the surgical stage of implants all fit comfortably into a 3–5 day visit when the laboratory is in the same building.
Bone needs 8–12 weeks to integrate an implant. Anyone offering implant placement plus final permanent crowns inside a week is either using an immediate-load protocol that requires specific bone conditions, or cutting a corner you will pay for later.
Visit one: surgery, temporary teeth, 3–5 days. Visit two, three months later: final crowns, 3–4 days. Many patients combine the second visit with a holiday, which is easier to justify than an anxious rush.
Full arch All-on-4 cases do leave with fixed provisional teeth on day two or three. The bridge is provisional by design — the final one comes later, and any clinic calling the first bridge 'final' is misleading you.
For implants, usually yes — unless immediate loading is suitable for your bone. Crowns, veneers and whitening are single-visit.