How dentures move from your mouth to the lab and back

Dentures are made in stages over several weeks, starting with impressions of your mouth and ending with adjustments at your dentist's office. The process involves your dentist, a dental lab technician, and multiple fittings where you try on the denture before it is finished. Most of the work happens in a lab, not in the dental chair — your dentist sends molds and measurements to a technician who builds the denture piece by piece, then sends it back for you to test.

The entire timeline from first appointment to wearing your finished denture usually takes four to six weeks, though some dentists offer faster options. You will visit your dentist at least three times: once for impressions, once or twice for fittings, and once for final adjustments. Understanding what happens at each stage helps you know what to expect and why the process takes as long as it does.

Key Takeaways

  • Your dentist takes a preliminary impression in a large tray, then a final impression in a custom tray made from that first mold, before sending both to the lab.
  • The lab technician pours plaster models from your impressions, arranges artificial teeth on a wax base, and then boils away the wax and pours acrylic plastic in its place.
  • You will try on the denture at least once before it is finished so your dentist can check the bite and the fit, and the lab can make changes.
  • Final adjustments happen at your dentist's office after you receive the finished denture, and may include grinding high spots and adding tissue conditioner to improve the seal.

The first appointment: taking impressions

At your first visit, your dentist takes two impressions of your mouth — one preliminary and one final. The preliminary impression uses a stock tray (a standard metal or plastic tray that comes in several sizes) filled with alginate, a fast-setting material that feels like thick pudding. You bite down or hold the tray in place for a few minutes while it hardens, then your dentist removes it. This impression is not precise enough for the final denture, but it gives the lab enough information to make a custom tray that fits your mouth exactly.

The lab receives the preliminary impression and pours plaster into it to create a model of your mouth. They then use this model to fabricate a custom tray — a thin plastic or acrylic shell that matches the shape of your mouth. Your dentist sends this custom tray back to you, and at your second appointment (usually one to two weeks later), your dentist uses it to take the final impression. The final impression uses a more precise material, often zinc oxide eugenol paste or a rubber-based compound, and captures fine details that will affect how well the denture fits and feels.

What the lab does with your impressions

Once the lab receives your final impression, the technician pours liquid plaster into it to create a working model — an exact replica of your mouth in plaster. This model becomes the base for building your denture. The technician then creates a second model, called the opposing model, which represents your bite relationship. If you are having a full denture on top and keeping your lower teeth, for example, the opposing model shows where your lower teeth sit so the upper denture teeth can be arranged to meet them correctly.

The technician next arranges artificial teeth on a wax base that sits on top of the plaster model. The teeth are positioned one at a time, and the technician adjusts their angle, spacing, and height to match your bite and facial proportions. This stage is called the wax-up. Once the arrangement is complete, your dentist will see this wax denture at a fitting appointment so you can check the bite, the appearance, and the overall fit before the lab moves forward.

The wax fitting and bite check

At your second or third appointment, your dentist inserts the wax denture so you can see how it looks and feels. This is called the wax try-in or bite appointment. You will bite down on the denture to check that your teeth meet evenly and that your jaw closes in a comfortable position. Your dentist may ask you to speak, smile, and move your mouth to see whether the denture stays in place and whether the teeth look natural in your face.

This is your chance to request changes before the denture is cast in permanent acrylic. If the teeth are too visible when you smile, or if they do not match your natural tooth color, or if the denture feels bulky in your mouth, tell your dentist now. Your dentist notes any changes and sends the wax denture back to the lab with written instructions. The lab will adjust tooth position, color, or the shape of the denture base before moving to the next stage. Some dentists charge a small fee for major changes at this stage, so ask beforehand if you think you may want significant adjustments.

Converting wax to acrylic: the processing stage

After your dentist approves the wax denture, the lab begins the processing stage. The technician places the wax denture in a flask — a two-part plaster container — and pours more plaster around it. Once the plaster hardens, the technician heats the flask in an oven to melt away the wax, leaving a hollow cavity in the shape of the denture. This is called dewaxing.

The technician then mixes acrylic powder and liquid into a dough-like consistency and packs it into the cavity. The flask goes into a pressure cooker or oven where heat and pressure harden the acrylic. Once it cools, the technician removes the denture from the flask, trims excess acrylic, and polishes the surface until it is smooth and shiny. The denture is now a finished product, but it still needs adjustments at your dentist's office before you can wear it full-time.

Final adjustments at your dentist's office

When you pick up your finished denture, your dentist will insert it and check the fit and bite. Even though the lab worked from precise impressions and a wax try-in, the acrylic denture may sit slightly differently in your mouth than the wax version did. Your dentist will look for high spots — areas where the denture presses too hard on your gum — and grind them down with a bur. You will bite on articulating paper (colored paper that marks where your teeth touch) so your dentist can see exactly where adjustments are needed.

Your dentist may also explore tissue conditioner, a soft material that fills small gaps between the denture base and your gum. This improves the seal and the fit, and the tissue conditioner gradually hardens over a few days. You may need to return for a follow-up visit one to two weeks later so your dentist can remove the tissue conditioner, check the fit again, and make any final grinding adjustments. Some soreness and minor adjustments are normal in the first few weeks of wearing a new denture.

Timeline and cost factors that affect how long it takes

The standard timeline from first appointment to finished denture is four to six weeks. This includes time for the lab to make the custom tray (one to two weeks), time between your appointments for the lab to process the denture (one to two weeks), and time for final adjustments. If you need multiple follow-up visits or if the lab has a backlog, the process may take longer.

Some dentists offer rush services that compress the timeline to two to three weeks by using faster materials or by having the lab work on your denture outside normal hours. Rush services usually cost more. The total cost of a full denture typically ranges widely depending on your location and your dentist's fees, but the process itself — impressions, fittings, lab work, and adjustments — is the same regardless of price. More expensive dentures are not necessarily made differently; they may reflect higher lab fees, more experienced technicians, or premium materials.

Frequently Asked Questions

Why does it take so long to make dentures?

Most of the time is spent in the lab, not in the dental chair. The lab technician must pour models, arrange teeth, create a wax denture, get your approval, process it in acrylic, and polish it — each step takes time. Your dentist also needs time between appointments to send materials to the lab and receive them back.

Can I wear my denture the same day it is finished?

No. Even after final adjustments, new dentures need time to settle into your mouth. Your dentist will schedule follow-up visits to check the fit and make grinding adjustments as your gums adjust to the denture. Wearing a denture that has not been fully adjusted can cause sores.

What if the denture does not fit after I pick it up?

Tell your dentist when ready. High spots and pressure areas are normal and are fixed by grinding. If the denture is loose or rocks side to side, your dentist may add tissue conditioner or send it back to the lab for adjustments to the base.

Can I make changes to the denture after it is finished?

Minor adjustments like grinding and tissue conditioner are done at your dentist's office. Major changes like repositioning teeth or reshaping the denture base require sending it back to the lab and cost extra. This is why the wax try-in stage is important — it is your final note to request changes before the denture is cast in permanent acrylic.

Do all dentists use the same lab?

No. Most dentists send dentures to a local or regional lab they have worked with for years. Some labs are faster or more experienced than others, which can affect how long your denture takes and how well it fits. You can ask your dentist which lab they use and whether they have options.