Why the second visit existed
Conventionally, a crown means an impression posted to a laboratory, a plastic temporary while you wait, and a second appointment two or three weeks later. That gap exists purely because the lab is somewhere else. Ours is in the next room.
What actually happens
Minutes 0–20 — preparation
Local anaesthetic, then the damaged tooth is shaped. This is the only genuinely uncomfortable part and it is no different from any other crown appointment.
Minutes 20–25 — scanning
A handheld wand builds a 3D model of the prepared tooth and the opposing bite. There is no tray, nothing sets in your mouth and nothing triggers a gag reflex.
Minutes 25–45 — design
The crown is designed on screen against your own bite. You can watch it if you want to — most people do — and the shape is adjusted before anything is cut.
Minutes 45–75 — milling
A ceramic block is milled to the design. This is the point where we send you across the road for a coffee, because watching a milling unit is less interesting than it sounds.
Minutes 75–120 — staining, glazing and fitting
The crown is characterised to match neighbouring teeth, fired, then tried in, adjusted and bonded. You leave with the final restoration in place.
When we would not do this
Same-day is not automatically the right answer. If a tooth needs a gum-level margin, if the bite needs rebuilding across several teeth, or if we want to see how a root-treated tooth settles first, we will say so and use a conventional lab crown instead.
- Deep subgingival margins — better with a lab technician's eye
- Full-mouth rehabilitation — needs a staged approach
- Front teeth where shade matching is critical — often a lab case
- Teeth with an uncertain prognosis — restore temporarily and review
“I broke a molar on a Friday. It was scanned, milled and bonded by lunchtime the same day. I still do not entirely believe it happened.”
How long they last
Milled ceramic crowns have a well-documented survival rate of around 95% at ten years, which is indistinguishable from a good lab crown. What shortens that number is grinding, so if you clench we will talk about a night guard before we talk about a crown.