Your dentist looked at a tooth and said it needs a crown, and your next thought was probably about your calendar. How many times will you have to leave work, and how long will the tooth stay in limbo?
You may hear different answers. One person had a crown made in a single appointment, and another wore a temporary while a lab did the work. Both can be true, because how long a crown takes depends on where the crown gets built.
How long does a crown take from start to finish?
A visit to check the tooth comes first, and after that a crown takes either one appointment or two. The tooth, the location of the damage and the way the crown is made decide which.
MedlinePlus describes a crown as a tooth-shaped cap that replaces your normal tooth above the gum line. That description holds on both paths, and only the maker and the timing of the cap change. Dr. Goh tells you which path your tooth is on before he starts. The last sections of this post explain how that call gets made.
Why do some crowns need two visits?
Because a lab builds them. On the two-visit path, the first appointment prepares the tooth and records its shape, then a lab makes the crown from that record. The second appointment fits it.
Cleveland Clinic lists the first visit as three steps. The dentist reshapes the tooth, takes an impression (physical or digital) and places a temporary crown. At the second visit the dentist removes the temporary, checks the shape, color and fit of the new crown, and bonds it to the tooth.
The gap between those visits is the lab's time, and Cleveland Clinic says a lab usually needs two to three weeks, sometimes longer. That is a general figure from a medical source, not a promise about any one lab. For the number on your own case, ask the office.
How does a crown get made in one visit?
The one-visit path moves the building into the office, and our crowns page describes the sequence. Dr. Goh numbs the tooth, offers nitrous and clears the decay. He then shapes what remains so the ceramic sits evenly all the way around.
Then a digital scan replaces the impression tray. He designs the crown on screen, mills it in the office, checks your bite and bonds it in the same appointment. When a case suits this path, there is no temporary crown and no second appointment.
Both paths share the same core: the tooth still gets shaped, and the crown still has to be checked for fit before it is bonded. The only things that disappear are the lab and the wait between visits.
What decides whether my tooth is a one-visit case?
Not every case suits the mill, and our crowns page names three situations that send a crown to a lab or add a step.
A front tooth. A front tooth often looks more natural in layered lab ceramic, so front-tooth crowns often go to a lab.
A margin below the gum. The margin is the edge where the crown meets the tooth. When that edge sits below the gumline, the tissue sometimes needs time to settle before anything final goes on.
A bridge. A bridge always takes two visits, because a lab builds the span between the supporting crowns. A bridge replaces a missing tooth by crowning the teeth on either side of the gap and joining them with a middle unit. We explain how that works in crown vs. filling.
So the question is not whether an office owns a mill. The question is whether your tooth is the kind of case a mill suits. Dr. Goh makes that call about the tooth before he starts.
What happens between the two visits?
A reshaped tooth should not sit uncovered for weeks, so a temporary crown covers it until the final crown arrives. According to the Leeds Teaching Hospitals NHS Trust, the temporary goes on with temporary cement. That lets it come off easily when the final crown is ready.
That easy removal is by design, because the dentist has to take the temporary off at the second visit. It also means a temporary can come loose before then.
If your temporary comes off, call the office. Our guide to dental emergencies explains what a reshaped tooth without its cover needs, and what to do with the crown in the meantime. If it will not wait, our emergency dentist page has the details.
Why does the tooth get shaped at all?
A crown is a cap, and a cap needs room to fit around the tooth, so the tooth is reduced first. Shaping takes healthy structure from every side, and enamel does not grow back. That is part of why Dr. Goh does not reach for a crown while a filling still has solid walls to bond to.
How do I find out which path my tooth is on?
Start with an exam: at Smiles by Goh the exam and the imaging that matters come first, and a written, itemised plan follows. The path depends on which tooth it is, whether the crown is part of a bridge and where its edge will sit. With those answers you have a good idea how many visits to plan for, and Dr. Goh confirms it before he starts.
If a dentist has told you a tooth needs a crown, bring that tooth to an exam and ask how many visits it needs. Call us at 702-732-3754, or read about becoming a new patient.