For decades, denture fabrication started the same way: alginate or polyvinyl siloxane loaded into a metal tray, pressed against edentulous ridges, and held still while a patient fought back a gag reflex. That process worked, but it was slow, uncomfortable, and prone to distortion. Intraoral scanners are replacing those trays with a handheld wand that captures thousands of data points per second, producing a precise 3D model of the patient's oral anatomy in minutes.
Explore AvaDent's digital denture workflow to see how intraoral scanning fits into a complete digital fabrication process. Scanner-based records create a direct path into AvaDent’s CAD/CAM denture products. Teams moving from scanning to production can review the AvaDent ordering workflow before submitting their first case.
This shift matters for practices that fabricate dentures regularly. Digital impressions for dentures reduce chair time, cut remakes, and give labs a more accurate starting point for design. Below, we break down which scanners work for denture cases, how they compare on accuracy, what makes edentulous scanning different from other dental applications, and how the data flows into platforms like AvaDent for final fabrication.
What Is an Intraoral Scanner and How Does It Work?
An intraoral scanner is a handheld optical device that projects structured light or laser patterns onto oral tissues and teeth. A camera captures how those patterns deform across the surface, and software stitches individual frames into a continuous 3D mesh. The result is a digital impression that can be sent directly to a dental lab or design platform.
Most modern scanners use confocal imaging, triangulation, or active wavefront sampling to build their 3D models. The scanning wand moves across the arch in a smooth path, capturing data at rates exceeding 6,000 frames per second on newer models. Within two to four minutes, the clinician has a complete digital record of both arches and the bite relationship.
Unlike traditional impression materials that can tear, bubble, or pull away from undercuts during removal, digital scans capture geometry without physical contact beyond the wand tip. The digital file can be stored indefinitely, shared instantly with a lab, and used to fabricate a replacement years later without asking the patient to return for a new impression.
Why Edentulous Scanning Is Different from Restorative Scanning
Scanning a full set of teeth gives the software plenty of fixed reference points: cusps, marginal ridges, interproximal contacts. Edentulous ridges lack those landmarks. The tissue is soft, mobile, and relatively uniform in color and texture, which makes it harder for the scanner's algorithms to orient each frame relative to the last.
This means that accuracy can drop when scanning fully edentulous arches, especially across longer spans. A 2023 study published in BMC Oral Health found that while intraoral scanners accurately captured denture-bearing areas, interpretation of the peripheral border and soft palate required additional clinical judgment. Practitioners who succeed with edentulous scanning typically adopt specific techniques to compensate for the lack of natural landmarks.
The practical difference is that edentulous scanning takes more skill, more deliberate scan paths, and sometimes supplemental tools like reference markers. It is not a plug-and-play process, but practices that invest in the learning curve report fewer remakes and faster turnaround once they are comfortable with the technique.
Scanner Types Compatible with Denture Workflows
Not every intraoral scanner handles edentulous cases equally well. Here are the most commonly used scanners in digital denture workflows and what sets each apart.
| Scanner | Manufacturer | Key Strength for Dentures | Scan Technology |
|---|---|---|---|
| Primescan 2 | Dentsply Sirona | High-speed capture reduces soft tissue distortion | Dynamic depth scanning |
| TRIOS 5 | 3Shape | Real-time HD color imaging aids tissue differentiation | Confocal microscopy |
| Medit i700 | Medit | Open architecture integrates with most lab platforms | 3D-in-motion video |
| iTero Element 5D | Align Technology | NIRI imaging detects subsurface tissue changes | Confocal with parallel imaging |
All four scanners can export STL or PLY files compatible with denture design platforms. The Medit i700 is popular among practices already using AvaDent because its open-file architecture avoids vendor lock-in. Primescan 2's speed advantage helps when scanning edentulous arches, since faster capture reduces the impact of saliva pooling or patient movement.
Learn what clinical records AvaDent accepts, including compatible intraoral scan formats.
Accuracy: How Do Digital Impressions Compare to Traditional Methods?
Accuracy in denture fabrication has two components: trueness (how close the scan is to the actual anatomy) and precision (how consistently the scanner reproduces the same result). For denture cases, both matter. A scan that is consistently off by the same amount can be compensated for in software, but a scan that varies unpredictably from one attempt to the next creates fitting problems.
Research published in the Journal of Prosthetic Dentistry in 2024 compared digital and conventional impressions for complete dentures and found that digital impressions produced denture bases with comparable or better adaptation to the residual ridge. The key variable was not the scanner itself but the clinician's technique during edentulous scanning.
A separate study in BDJ Open (2025) evaluated multiple scanner brands on edentulous models and reported trueness values within 50 to 100 micrometers for the best-performing devices, which is within the clinical tolerance for denture base adaptation. Traditional impressions typically achieve 50 to 150 micrometers of accuracy depending on the material and handling.
The practical takeaway: digital impressions for dentures match or exceed traditional methods in controlled conditions, but the clinician's scanning technique is the single biggest variable affecting the final result.
Overcoming Edentulous Scanning Challenges
The challenges are real but solvable. Here are the techniques that experienced clinicians use to get reliable scans on edentulous patients.
1. Use reference markers
Placing small adhesive markers or a thin dusting of titanium dioxide powder on the tissue gives the scanner's algorithms fixed points to track. This is the most effective single intervention for improving scan accuracy on edentulous ridges. Some scanners now include software that specifically assists with marker-based registration.
2. Follow a deliberate scan path
Start at the center of the ridge crest and scan in a continuous zigzag pattern from one tuberosity or retromolar pad to the other. Avoid jumping between sections or lifting the wand mid-scan. A continuous path minimizes stitching errors where the software has to reconnect separate scan segments.
3. Manage moisture
Saliva and blood create reflective surfaces that confuse optical scanners. Keep the area as dry as possible with gentle air or cotton rolls. Some clinicians prefer scanning the mandibular arch first while the patient's salivary flow is lower at the start of the appointment.
4. Capture the bite registration carefully
For complete denture cases, the bite registration is as important as the arch scans. Use a reference denture or bite rim to establish vertical dimension of occlusion, then scan the patient biting on the registration. AvaDent's digital workflow accepts scans of both arches plus a bite scan to reconstruct the full articulation digitally.
5. Verify before sending to the lab
Most scanner software includes tools for checking mesh completeness and identifying voids. Spend 30 seconds reviewing the scan on screen, rotating the model, and looking for holes or obvious distortion before sending the file. A quick rescan of a small area is much cheaper than remaking a denture.
How Intraoral Scan Data Integrates with AvaDent's Digital Platform
Once the scan is captured, the digital file moves into the fabrication pipeline. AvaDent's platform accepts intraoral scans from seven major scanner brands through its cloud-based dashboard. Here is how the process works.
- Upload scan files: Export the STL or PLY files from your scanner software and upload them through the AvaDent dashboard. Include upper arch, lower arch, and bite registration scans.
- Digital design review: AvaDent's Computer Aided Engineering (CAE) platform processes the scans and generates a digital denture design, including tooth arrangement and base contours. The design uses Adaptive Occlusion software that draws on data from over 250,000 cases to predict optimal occlusal contacts.
- Clinician approval: You receive a digital preview of the proposed denture within 1 to 2 business days. Review tooth position, midline, vertical dimension, and overall aesthetics. Request modifications before approving for fabrication.
- Fabrication and delivery: After approval, AvaDent mills the final dentures from a single puck of XCL (eXtreme-Cross-Linked) PMMA, a material up to 8 times stronger than conventionally processed denture acrylic. Finished dentures ship within 6 business days via free 2-day FedEx delivery.
The entire process, from scan upload to denture delivery, typically takes 7 to 8 business days. Because every case is stored digitally, replacement dentures can be fabricated from the same file without a new impression.
What Is the Learning Curve for Intraoral Scanning in Denture Cases?
Practices adding intraoral scanning to their denture workflow should plan for a transition period. Based on published data and clinician feedback, here is a realistic timeline.
| Phase | Timeframe | What to Expect |
|---|---|---|
| Initial training | 1 to 2 days | Basic scanner operation, software setup, first supervised scans |
| Guided practice | Weeks 1 to 4 | Scanning on every denture case with mentor review; expect some rescans |
| Independent scanning | Months 2 to 3 | Consistent scan quality; scan times drop to under 5 minutes per arch |
| Full proficiency | Months 4 to 6 | Confident handling of difficult edentulous anatomy; minimal rescans |
The steepest part of the curve is the first 10 to 15 edentulous cases. Clinicians comfortable with restorative scanning often overestimate their readiness for edentulous cases because the technique differences are significant. Dedicated training on edentulous scanning, rather than just general scanner training, accelerates the transition.
Read AvaDent's guide to digital impressions for dentures for specific tips on getting started.
Cost Considerations for Practices
Intraoral scanners range from approximately $20,000 to $50,000 depending on the brand, features, and subscription model. Some manufacturers offer monthly payment plans or bundle the scanner with software subscriptions.
The return on investment for denture-focused practices comes from three areas:
- Fewer remakes: Digital impressions reduce distortion-related remakes, which cost $200 to $500 per case in materials and chair time.
- Faster chair time: A digital scan takes 2 to 4 minutes versus 5 to 8 minutes for a traditional impression (including material mixing and set time). Over hundreds of cases per year, that adds up.
- Permanent digital records: Storing scans digitally eliminates the need for physical model storage and makes replacement dentures faster to fabricate.
For practices already using a scanner for restorative cases, the additional investment is primarily in training, not hardware. The scanner they already own likely supports denture workflows with the right software export settings.
Frequently Asked Questions
Can you use an iTero scanner for dentures?
Yes. The iTero Element 5D supports edentulous scanning and exports files in formats compatible with digital denture platforms. Performance on fully edentulous arches depends on the clinician's scanning technique, particularly the use of reference markers and a consistent scan path. Many practices use iTero for both Invisalign and denture workflows.
How do they scan for dentures without teeth?
Clinicians scan the edentulous ridges directly, often using adhesive reference markers or a light dusting of scanning powder to help the scanner's software distinguish tissue surfaces. The scan captures the ridge shape, palate, vestibule, and any remaining anatomical landmarks. A separate bite registration scan establishes the jaw relationship.
Do digital impressions work as well as traditional impressions for complete dentures?
Published research shows that digital impressions produce denture bases with comparable or better adaptation to the residual ridge when the scan is performed correctly. The main factor affecting accuracy is the clinician's scanning technique rather than the scanner hardware. Practices that invest in proper training see results that match or exceed traditional methods.
How long does an intraoral scan take for a denture patient?
A complete scan of both arches plus a bite registration typically takes 5 to 10 minutes for an experienced clinician. During the initial learning phase, expect 10 to 15 minutes. This compares to 5 to 8 minutes per arch for a traditional impression, but without the wait for material setting time or the risk of pulls and voids requiring a retake.
Moving Forward with Digital Denture Impressions
Intraoral scanners are not a future technology for denture fabrication. They are a current, proven tool that thousands of practices already use daily. The scanners are accurate enough, the workflows are established, and platforms like AvaDent accept digital impressions directly.
The practical question for most practices is not whether to adopt digital scanning for dentures, but when to start and how to structure the transition. Start with a scanner your team already knows, invest in edentulous-specific training, and run your first cases alongside traditional impressions until you are confident in the results.
Digital records last forever. Traditional impressions do not. Every case you scan today becomes a permanent asset that simplifies future care for that patient.
Contact AvaDent to learn how your intraoral scanner connects to the digital denture workflow.
