How Are Digital Dentures Made? A Step-by-Step Lab Workflow

Ask a dental lab how digital dentures are made and the answer usually starts with a scanner instead of an impression tray. That single change — replacing physical impressions with optical data — reshapes every step that follows. The workflow is faster, more repeatable, and easier to document than conventional processing, but it demands a different kind of quality control.

This article walks through the full production sequence: scanning, CAD design, try-in, milling or printing, and finishing. It also explains where digital dentures go wrong when a lab skips a step or treats the digital file as a shortcut rather than a tool.

If you want background on what digital dentures are and why labs use them, this guide to digital dentures covers the benefits and the decision points.

Step 1: Optical Scanning Replaces the Impression

The workflow begins with a digital model of the patient’s mouth. That model comes from one of three sources.

Intraoral scan. The dentist scans the patient’s mouth directly with an optical scanner. This captures the gum ridge, the palate, and any remaining teeth in a single file. The scan goes to the lab electronically, which eliminates shipping time and the dimensional drift that happens when a physical impression sits in a box for days.

Model scan. If the dentist took a conventional impression, the lab pours a stone model and scans that. This is the bridge between old and new workflows. The accuracy depends on the impression quality — a distorted impression produces a distorted scan, no matter how good the scanner is.

Existing denture scan. The patient brings an old denture. The lab scans it, uses it as a reference for tooth position and border extension, and then modifies the design in CAD. This is a starting point, not a finished product. The old denture’s flaws carry into the new design unless the technician corrects them.

The scanner itself matters less than what happens next. A high-resolution scan is useless if the technician does not mark the denture border correctly or misjudges the tissue depth. Digital dentures shift the skill requirement from manual carving to digital analysis.

Step 2: CAD Design Maps the Denture Before Any Material Is Cut

The scanned model goes into CAD software, where the technician designs the denture base, the tooth setup, and the border extension.

Base design. The software maps the denture base directly onto the digital gum ridge. The technician sets the border to match the functional depth of the vestibule — the fold where the cheek and gum meet. A border that is too short loses retention. A border that is too long rubs and hurts. This is the same clinical judgment as conventional border molding, done on a screen.

Tooth setup. The technician selects digital teeth from a library and positions them according to the patient’s jaw relationship, lip support, and bite plane. The software checks the occlusion digitally, which catches interferences before any material is milled. In a conventional workflow, this happens on an articulator with wax. The digital version is faster, but it still requires a technician who understands occlusion. The software cannot tell you if the midline is wrong or the smile line looks unnatural.

Try-in planning. For cases where the aesthetic risk is high, the lab prints a try-in denture. The patient wears it for a few days, and the dentist checks fit, phonetics, and lip support. Adjustments are marked on the try-in, scanned back into the software, and incorporated into the final design. This step is where digital dentures earn their cost. A conventional try-in requires a wax rim and a second appointment; the digital try-in is printed from the same file that will produce the final denture.

The CAD stage is where the digital workflow either matches conventional quality or falls short. A lab that rushes the design and skips the try-in produces a denture that fits the scan but not the patient.

Step 3: Milling or 3D Printing Turns the File into a Denture

After design approval, the digital file moves to manufacturing. Two paths exist, and they produce different results.

Milling

A milling machine cuts the denture base from a pre-polymerized acrylic puck or a zirconia block. The puck is solid and dense, which means the milled base is stronger than a conventionally processed base of the same thickness. No shrinkage, no porosity, no free monomer. The teeth can be milled separately from multilayer blocks and bonded into the base.

Milled dentures take longer to produce per unit and generate more material waste. The equipment costs more. But the fit and strength are the closest thing to an ideal acrylic base that a lab can make. Most labs use milling for final dentures when the case is straightforward and the material density matters.

3D Printing

A resin printer builds the denture base layer by layer from a liquid photopolymer. Printing is faster and cheaper than milling, and it handles complex geometries that a milling machine cannot reach. The trade-off is material strength. Printed denture base resins have improved significantly, but they still do not match the density and longevity of milled acrylic.

Printing works well for try-in dentures, temporary prostheses, and cases where speed matters. For a permanent full denture that the patient will wear for years, milling remains the safer choice unless the lab uses a validated permanent denture resin with documented clinical results.

Some labs combine both: printed try-in for patient approval, milled final for delivery. The file does not change between stages, which means the patient approves exactly what the lab will deliver.

Step 4: Finishing, Polishing, and Quality Control

The milled or printed denture comes out of the machine with a rough surface and support structures that need removal. This is the most labor-intensive stage in the digital workflow.

Support removal. Printed dentures have support struts that the technician cuts away. Milled dentures have a sprue or connection point that gets ground down. These areas are then smoothed to the surrounding surface.

Polishing. Acrylic bases are polished with progressively finer abrasives until the tissue surface is smooth and non-porous. The polished surface resists plaque accumulation and feels better against the gum. The teeth are polished separately, with care taken not to flatten the occlusal anatomy.

Bonding. If the teeth were milled or printed separately, they are bonded into the base with a luting agent. The bond must be strong enough to withstand chewing forces without debonding. A weak bond is one of the most common failure points in digital dentures.

Final quality check. The lab checks the fit on the digital model, verifies the occlusion, and inspects the surface for voids or rough edges. Some labs also run a final scan to compare the finished denture against the original CAD file. Any deviation beyond the tolerance threshold gets corrected before delivery.

The quality check closes the loop. It confirms that the denture the patient receives is the same one the dentist approved at the try-in stage.

What Digital Dentures Get Wrong When Labs Cut Corners

The digital workflow removes some sources of error and introduces new ones. The most common problems come from skipping steps.

Relying on the scan without clinical judgment. A scan shows geometry, not tissue condition. A lab that designs a denture border purely from scan data misses the compressibility of the gum tissue and the functional movement of the cheeks. The result is a denture that fits on the model but not in the mouth.

Skipping the try-in. Not every case needs a try-in, but high-risk cases do: patients with unusual jaw relationships, flat ridges, or a history of failed dentures. A lab that skips the try-in to save a week may save the lab time, but the patient pays for it in comfort.

Using the same resin for try-in and final. Try-in resins are designed for short-term wear. Final resins are designed for durability. Mixing them up produces a denture that looks good at delivery and degrades within a year.

Treating the workflow as fully automated. The software, scanner, and milling machine are tools. The outcome depends on the technician who reads the scan, sets the occlusion, and checks the finish. A fully automated denture workflow does not exist yet — not one that produces clinically acceptable results across all patients.

How digital dentures are made matters less than who makes them. A capable technician with average equipment beats a careless one with a high-end scanner. The digital workflow raises the ceiling; it does not remove the floor.

How Long the Process Takes

A conventional complete denture typically takes 5 to 8 appointments across several weeks. A digital denture compresses that timeline in two ways.

Try-in from scan. If the dentist sends an intraoral scan, the lab can produce a try-in denture in 3 to 5 working days. For a conventional workflow, the first wax try-in takes longer because the impression must ship to the lab and the wax rim must be set up by hand.

Final delivery. After try-in approval, the final milled denture takes another 3 to 7 working days depending on the lab’s schedule. A 3D-printed final takes less time but carries the material trade-offs mentioned above.

The total digital workflow from scan to final delivery runs about 7 to 14 working days for most cases. Rush cases can move faster. The limiting factor is rarely the milling machine — it is the technician’s queue and the try-in approval loop.

For dental practices and labs evaluating digital denture production, the timeline advantage only matters if the lab manages the workflow well. A digital lab with a three-week backlog is not faster than a conventional lab with a clean schedule.