--- title: "Digital Scan vs Impressions UK 2026 | Records Explained" url: https://virtualconsultant.online/guides/orthodontic-scan-vs-impressions-uk description: "Digital intraoral scans versus putty impressions for orthodontic records: accuracy, comfort, and what to expect at the visit." updated: 2026-08-17T00:00:00Z publisher: Virtual Consultant Online --- Records Technology Getting Started # Digital Scan vs Traditional Impressions — Which Does Your Orthodontist Use? Orthodontic records need accurate models of your teeth. Traditional putty impressions have been largely replaced in UK practices by digital intraoral scanners such as iTero and 3Shape TRIOS. Both methods produce clinically accurate records, but the patient experience is very different — and digital scans are faster, more comfortable, and directly integrated with aligner planning software. [Start Photo Assessment](https://virtualconsultant.online/evaluations/quote) [Compare Costs](https://virtualconsultant.online/costs) ## What orthodontic models are used for Before treatment begins, your orthodontist needs accurate three-dimensional records of your teeth and bite. These records serve several purposes: they form the basis of the treatment plan, allow monitoring of progress during treatment, are used by laboratories to fabricate appliances such as retainers and aligners, and provide a legal record of your dental anatomy before treatment started. Historically, plaster models cast from impressions were stored physically for years. Today, digital files serve the same purpose and can be archived, shared with laboratories digitally, and used directly by aligner planning software such as ClinCheck for Invisalign or Dental Monitoring. The quality and accuracy of these records directly affects treatment planning, so the method used matters clinically as well as for patient comfort. ## Traditional alginate impressions — the process, pros and cons Traditional impressions use alginate — a seaweed-derived powder mixed with water to form a thick paste — loaded into a horseshoe-shaped tray that is pressed against the teeth and held in place for two to three minutes while the material sets. The resulting negative impression is then filled with plaster or stone to produce a positive model. The process is straightforward and inexpensive, and the equipment requires no significant investment. However, many patients find it uncomfortable: the material can trigger a gag reflex, the tray can feel large, and the experience of having a setting material in the mouth for several minutes is unpleasant for some. Alginate is also technique-sensitive — bubbles, distortion on removal, or delays between taking the impression and pouring the model can compromise accuracy. Some practices still use polyvinylsiloxane (PVS) impression materials, which are more dimensionally stable but share the same experience drawbacks. ## Intraoral digital scanners — how they work, comfort, and accuracy Intraoral scanners use a small wand fitted with a camera and light source that is moved around the mouth, capturing thousands of images per second. Software stitches these images together in real time to produce a highly accurate three-dimensional digital model visible on screen as the scan proceeds. The process typically takes five to ten minutes per arch for an experienced operator. There is no material in the mouth — just the scanner wand — which eliminates the gag reflex trigger and the sensation of setting material. Accuracy studies consistently show intraoral scanners are equivalent to or superior to alginate impressions for most orthodontic applications, with the added benefit of immediate digital output. The digital file can be sent electronically to aligner manufacturers or laboratories within minutes, avoiding postal delays. Patient satisfaction scores consistently favour digital scanning over traditional impressions. ## iTero Element — Invisalign's native scanner The iTero Element scanner, produced by Align Technology (the maker of Invisalign), is the most widely deployed intraoral scanner in UK orthodontic practices offering clear aligner treatment. It produces the scan files used directly by the ClinCheck treatment planning software, which creates the virtual tooth movement simulation shown to patients before treatment begins. iTero scanners are present in a high proportion of Invisalign Premier and Diamond practices. iTero also offers an Outcome Simulator that allows patients to see a projected result on screen during the records appointment. While iTero can be used for fixed appliance records as well, its native integration with the Invisalign workflow is its primary clinical advantage. The scanner uses structured white light rather than powder, meaning no preparation of the teeth is needed before scanning. ## 3Shape TRIOS and other systems 3Shape TRIOS is a widely used competitor to iTero, particularly popular in practices that use multiple aligner systems or offer a range of dental treatments beyond orthodontics. TRIOS integrates with multiple aligner brands including SureSmile and SparkAligners, as well as restorative and implant workflows. Other scanners used in UK practices include the Dentsply Primescan, the Carestream CS 3600, and the Medit i700. Each has slightly different ergonomics and software ecosystems, but the clinical output — an accurate digital model — is comparable across systems. The choice of scanner in a practice is typically driven by the aligner brands it works with and the software ecosystem the practice uses for wider digital dentistry. From a patient perspective, the experience across modern intraoral scanners is broadly similar. ## Which is better — the evidence on accuracy and patient preference Systematic reviews comparing intraoral scanners with traditional impressions consistently find that digital scans achieve clinically acceptable accuracy for orthodontic treatment planning and appliance fabrication. For full-arch scanning in orthodontics — as opposed to restorative work requiring sub-millimetre marginal fits — intraoral scanners perform at least as well as alginate impressions, with some studies showing marginal superiority in the anterior segment. Patient preference studies strongly favour digital scanning: reported discomfort and anxiety are significantly lower, and the visual feedback of seeing a 3D model on screen in real time tends to increase engagement. The main practical advantage of traditional impressions is cost — alginate is cheap, the tray is reusable, and no capital investment is required. For practices that have invested in a scanner, digital records also eliminate the cost and delay of model storage and postage. ## Useful related pages [Orthodontic Records UK Guide](https://virtualconsultant.online/guides/orthodontic-records-uk) [Understanding Your Orthodontic Quote](https://virtualconsultant.online/guides/understanding-orthodontic-quote-uk) [Best Clear Aligners UK](https://virtualconsultant.online/guides/best-clear-aligners-uk) [Types of Braces UK](https://virtualconsultant.online/guides/types-of-braces-uk) [Get a Virtual Consultation](https://virtualconsultant.online/evaluations/quote) This guide is for general information only. It is not a diagnosis, treatment plan, or substitute for advice from a registered dentist or orthodontist. ### Compare next steps [Orthodontist Near Me](https://virtualconsultant.online/locations/orthodontic-treatment-near-me) [Clear Aligners Near Me](https://virtualconsultant.online/treatments/clear-aligners-near-me) [Invisalign Near Me](https://virtualconsultant.online/locations/invisalign-provider-near-me) [Browse Locations](https://virtualconsultant.online/locations) ### Ready for a clearer starting point? Upload guided photos and receive an indication of likely treatment options and pricing before booking appointments. [Get an Online Quote](https://virtualconsultant.online/evaluations/quote) ### Frequently Asked Questions Is a digital scan as accurate as traditional impressions? For orthodontic purposes, yes. Systematic reviews and clinical studies consistently show that modern intraoral scanners produce models of equivalent or superior accuracy to alginate impressions for treatment planning and aligner fabrication. The key advantage of digital scans is the elimination of dimensional changes that can occur with alginate if there is a delay between taking the impression and pouring the model. Do digital scans cost more than impressions? The scanner represents a significant capital investment for a practice, but this cost is not typically passed directly to patients as a separate line item. In most UK practices, records — whether digital or traditional — are included in the overall treatment fee or charged as a flat records fee. You may occasionally see a practice charging slightly more for digital records to offset equipment costs, but this is not universal. Ask what is included in the records appointment fee. Can I refuse impressions and request a digital scan instead? You can express a preference for a digital scan, and most practices with a scanner will accommodate this. However, if a practice does not have a scanner, it cannot offer one. If you have a strong gag reflex or significant anxiety about traditional impressions, it is worth raising this before the appointment — some practices will prioritise scanner use for patients with these concerns, or can modify impression techniques to reduce discomfort. How long does a digital scan take? A full-mouth digital scan for orthodontic records typically takes five to fifteen minutes depending on the clinician's experience with the scanner and the complexity of the dentition. This compares to two to three minutes per arch for a traditional impression, though the overall records appointment time including photography and radiographs is similar for both approaches. Are digital scans used for all types of braces? Digital scans can be used for records for all brace types, including fixed metal braces, ceramic braces, lingual braces, and clear aligners. The direct workflow benefit is greatest for clear aligner treatment, where the scan file is uploaded directly to the aligner manufacturer's planning software. For fixed appliance records, the digital model is used for treatment planning and retainer fabrication at the end of treatment. Do I get a copy of my digital scan? You can request a copy of your digital scan — as a patient, your clinical records belong to you and you are entitled to access them under UK data protection law. Most practices will provide a digital file on request, though they may charge an administrative fee. The file format (STL or PLY) can be viewed using free 3D viewing software or opened by any dental laboratory or orthodontic practice. Explore your options Quick links Not sure where to start? Use these quick links to explore orthodontic treatments, typical costs, and helpful guides that explain what different options involve. Whether you're researching braces or clear aligners, comparing pricing, or just getting a feel for what comes next, you can browse at your own pace and come back when you're ready to request a quote. 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Upload guided photos and get a tailored recommendation for your teeth and bite. [Start Photo Assessment](https://virtualconsultant.online/evaluations/quote) [Find an Orthodontist](https://virtualconsultant.online/locations) Citation details Title Digital Scan vs Impressions UK 2026 | Records Explained Publisher Virtual Consultant Online Published 2024-06-01 Updated 2026-08-17 URL [https://staging.virtualconsultant.online/guides/orthodontic-scan-vs-impressions-uk](https://staging.virtualconsultant.online/guides/orthodontic-scan-vs-impressions-uk)