Digital X-Rays & iTero Scanning: Better Dental Care
- Jun 20
- 10 min read
Most people assume a dental X-ray is a dental X-ray, no matter where they get it done. That assumption costs them. Outdated film-based imaging exposes patients to significantly more radiation, produces lower-resolution images, and adds unnecessary wait time to every appointment. A digital X-rays dentist in St. John's using current imaging technology can detect cavities between teeth, early bone loss, and hidden infections that film simply misses. At Stavanger Dental, we use digital radiography and iTero scanning not because they are trendy, but because the diagnostic difference is measurable and the patient experience is genuinely better.
Table of Contents
Quick Takeaways
Key Insight
Explanation
Digital X-rays reduce radiation by up to 90%
Compared to traditional film radiography, digital sensors require far less exposure to produce a diagnostic-quality image, making them safer for children and frequent imaging needs.
Images are available instantly
No darkroom, no chemical processing. Digital images appear on screen within seconds, allowing your dentist to discuss findings with you in real time during your appointment.
iTero eliminates physical impressions
The iTero intraoral scanner captures a full 3D digital model of your teeth without the gagging and discomfort of traditional putty-based impressions.
Early detection is the primary advantage
Digital radiography reveals issues at earlier stages, including interproximal decay, bone density changes, and periodontal pockets, allowing less invasive treatment options.
iTero enables outcome simulation before treatment
The Outcome Simulator feature shows patients a projected result of Invisalign treatment before a single aligner is ordered, supporting informed decision-making.
Records are stored securely and shareable
Digital files are stored in encrypted patient records and can be shared instantly with specialists or insurance providers, reducing paperwork delays.
Modern dental technology reduces total treatment time
Faster, more accurate diagnostics at the front end of treatment planning means fewer follow-up appointments and corrective procedures down the line.
What Digital X-Rays Actually Do Differently
Film-based radiography dominated dentistry for over a century, and it worked, but it required chemical development, produced images with limited contrast adjustment, and delivered radiation doses that were simply higher than necessary. Digital radiography replaces the film with an electronic sensor that captures the X-ray beam and converts it directly into a digital image on a computer screen.
In practice, the diagnostic quality difference is significant. Digital images can be zoomed, rotated, and adjusted for brightness and contrast without losing resolution. A dentist can highlight a suspicious area between two molars that would appear as a faint shadow on film, making the difference between catching decay at the enamel stage versus discovering it when it has already reached the pulp.
The data consistently shows meaningful radiation reduction. According to the American Dental Association, digital sensors require 50 to 80 percent less radiation than traditional film, with some systems achieving up to 90 percent reduction. For a patient getting a full-mouth series, that is a clinically relevant difference, particularly for children, pregnant patients, and anyone requiring frequent monitoring.
Why Image Enhancement Matters Clinically
A common mistake in evaluating dental technology is assuming that "better image quality" just means a clearer picture. It means more than that. When a dentist can adjust contrast to isolate bone density differences, they can identify early-stage periodontal bone loss before it becomes symptomatic. That changes the treatment plan from a surgical conversation to a scaling and root planing conversation.
At Stavanger Dental, digital X-rays are part of every new patient exam and are used to track changes over time with direct before-and-after comparison. That longitudinal view is something film never supported efficiently.
Pro tip: Ask your dentist to walk you through your digital X-ray images on screen during your appointment. A good practice will show you exactly what they are looking at and why, rather than just handing you a diagnosis at the end.
The iTero Scanner in NL: What It Is and Why It Matters
The iTero scanner is an intraoral digital impression system developed by Align Technology, the same company behind Invisalign. It uses a handheld wand equipped with optical sensors to capture thousands of images per second, assembling them into a precise 3D digital model of your teeth and gums in real time. For patients in St. John's looking for modern dental technology, it represents a meaningful upgrade over traditional impressions.
Traditional impressions involve a tray filled with polyvinyl siloxane or alginate material pressed against the teeth and held there for several minutes while it sets. For patients with a strong gag reflex, dental anxiety, or sensory sensitivities, this process is genuinely unpleasant. The iTero scanner replaces all of that with a small wand moved across the teeth while the patient breathes normally.
Accuracy Compared to Physical Impressions
Physical impressions introduce error at multiple stages: material shrinkage during setting, distortion during removal, and inaccuracies introduced in the pouring and shipping of plaster models. Studies published in dental literature have found digital impressions using systems like iTero to be measurably more accurate for crown preparation fits and aligner fabrication.
The practical result is fewer remakes, better-fitting restorations, and aligners that track more predictably. For anyone considering Invisalign through a dentist in St. John's, starting with an accurate digital scan rather than a physical impression sets the entire treatment on a stronger foundation.
"The shift to digital impressions is not simply a convenience upgrade. It is a fundamental improvement in the precision of the data sent to the dental laboratory." - Dr. Irfan Ahmad, author of Digital Dental Photography, Quintessence Publishing
Radiation Levels: Digital vs. Traditional Film
Radiation concern is the number one question patients ask before agreeing to dental X-rays, and it is a fair one. The answer, when using digital radiography, is consistently reassuring. A single digital bitewing X-ray delivers approximately 0.001 millisieverts (mSv) of radiation. For context, the average person receives about 3.1 mSv annually from natural background radiation just by living on Earth.
A full-mouth series using digital radiography delivers roughly 0.005 mSv. Flying from St. John's to Vancouver exposes a passenger to approximately 0.03 mSv of cosmic radiation. The numbers are not close. Skipping dental X-rays out of radiation concern often causes more harm than the X-rays themselves by allowing undetected decay or bone loss to progress to a more invasive treatment stage.
For children specifically, the reduced exposure of digital radiography matters more because children are more radiosensitive than adults. At Stavanger Dental, we use the lowest diagnostic dose necessary and follow ALARA principles, meaning As Low As Reasonably Achievable, for every patient regardless of age.
Clinical Benefits That Directly Affect Your Treatment
The most important question about any clinical technology is simple: does it change what happens to the patient? For digital X-rays and iTero scanning, the answer is yes, in specific and documented ways.
Earlier Detection of Interproximal Decay
Cavities between teeth are among the most commonly missed diagnoses in dentistry using older imaging. Digital radiography with enhanced contrast resolution catches interproximal lesions at the enamel or early dentin stage, when a small composite filling is the appropriate intervention. Catch the same cavity two years later, and it may require a crown or even a root canal.
Better Planning for Implants and Orthodontics
For patients considering dental implants or orthodontic treatment, the combination of digital X-rays and iTero scanning provides a comprehensive picture of bone volume, tooth position, and soft tissue architecture that film and physical impressions simply cannot match. Implant placement decisions depend on bone density and proximity to anatomical structures. Getting that data from high-resolution digital imaging reduces surgical risk and improves long-term implant success rates.
Monitoring Periodontal Health Over Time
Gum disease progresses silently in most patients. Digital X-ray series from consecutive years, stored in a patient's digital record, allow a dentist to track bone level changes with a level of specificity that was impractical with film. A 1 millimeter change in crestal bone height becomes visible and measurable rather than estimated.
Pro tip: If you have a history of gum disease, ask your dentist specifically about using digital periapical X-rays at regular intervals to track bone levels, not just bitewing X-rays taken at routine checkups.
How These Technologies Compare
Feature
Traditional Film X-Ray and Physical Impression
Digital X-Ray and iTero Scanner
Radiation exposure
Higher, requires more exposure to achieve diagnostic quality
Up to 90% lower radiation dose
Image availability
Requires chemical development, adds 10 to 20 minutes minimum
Appears on screen within seconds of capture
Image adjustability
Fixed once developed, no contrast or zoom adjustment
Fully adjustable for brightness, contrast, and magnification
Impression comfort
Putty trays held in place for several minutes, common gag reflex trigger
Small scanner wand, no material, no waiting
Impression accuracy
Subject to material shrinkage and distortion during shipping
Sub-millimeter accuracy, transmitted digitally to lab
Record storage
Physical films, risk of damage, loss, or degradation
Encrypted digital records, easily shared with specialists
Treatment simulation
Not available
iTero Outcome Simulator shows projected Invisalign results
How iTero Powers Invisalign Treatment at Stavanger Dental
Invisalign and iTero are tightly integrated systems. Align Technology, which manufactures both, designed the iTero scanner to feed directly into the ClinCheck treatment planning software used to engineer each set of Invisalign aligners. When a St. John's patient visits Stavanger Dental for an Invisalign consultation, the iTero scan replaces the impression step entirely.
The scan data is transmitted to Align Technology's fabrication facilities, where ClinCheck generates a virtual treatment plan showing tooth-by-tooth movement across the projected treatment timeline. Dentists review and approve this plan before any aligners are manufactured. The accuracy of the initial scan directly influences how well each aligner stage tracks, which in turn determines whether the treatment stays on schedule or requires refinements.
The Outcome Simulator: Showing Results Before Treatment Starts
One of the most practically useful features of the iTero platform is the Outcome Simulator, which projects what a patient's smile will look like after treatment is complete. This is done at the consultation appointment, using the 3D scan captured that day. Patients can see a simulated before-and-after comparison while still in the chair.
This is not a marketing gimmick. It is a tool that allows patients to make genuinely informed decisions about whether to proceed with treatment, and it sets realistic expectations before any financial commitment is made. For families in St. John's weighing Invisalign as an option for themselves or a teenager, that simulation is a meaningful part of the decision-making process.
What to Expect During a Digital Imaging Appointment
If you are a new patient at Stavanger Dental, a full diagnostic imaging appointment typically includes a set of digital bitewing X-rays, periapical X-rays of any areas of concern, and depending on your treatment plan, a panoramic digital X-ray that shows the full jaw and supporting structures in a single image.
The bitewing and periapical X-rays take a few seconds each per exposure. A small sensor is placed in the mouth, positioned by the dental professional, and the exposure is triggered. The image appears on the adjacent screen almost immediately. The full series is usually completed in under 15 minutes, including the review of images with your dentist.
If an iTero Scan Is Part of Your Appointment
An iTero scan takes approximately 5 minutes for a full arch scan. The wand is moved methodically across the biting surfaces, outer surfaces, and inner surfaces of both arches. As it captures data, a 3D model assembles in real time on the monitor. There is no discomfort, no holding still for extended periods, and no material in the mouth.
Some patients with a strong gag reflex who have avoided impressions for years find the iTero scan entirely manageable. This makes it particularly valuable for patients who have delayed restorative work or orthodontic consultations because they dreaded the impression process.
Stavanger Dental also accepts the Canadian Dental Care Plan, which means eligible patients can access diagnostic imaging services including digital X-rays as part of their covered benefits. If you are unsure about your coverage, the front desk team can review your plan before your appointment so there are no surprises.
Frequently Asked Questions
Are digital X-rays safe for children?
Yes. Digital X-rays deliver up to 90 percent less radiation than traditional film X-rays, making them the appropriate choice for pediatric patients who are more radiosensitive than adults. At Stavanger Dental, we use the minimum diagnostic dose necessary for every patient and follow ALARA radiation safety principles. Routine X-rays for children are recommended by the Canadian Dental Association to monitor jaw development and detect early decay in primary and permanent teeth.
How often do I need dental X-rays?
The frequency depends on your individual risk profile. Patients with a history of decay, gum disease, or restorative work typically benefit from bitewing X-rays annually. Low-risk adult patients may only need them every 18 to 24 months. Your dentist at Stavanger Dental will recommend an imaging schedule based on your clinical history, not a blanket policy applied to every patient.
What is the iTero scanner used for beyond Invisalign?
The iTero scanner is used for crown and bridge planning, monitoring gum tissue changes over time, fabricating nightguards and sports mouthguards, and assessing tooth wear patterns. Any treatment that previously required a physical impression can now be completed with a digital scan. This includes partial dentures, implant-supported restorations, and smile design planning for cosmetic cases involving veneers.
Does the iTero scan replace X-rays?
No, and this is an important distinction. The iTero scanner captures surface geometry, meaning the visible tooth and gum structures. It does not show bone levels, internal tooth anatomy, or decay between teeth. Digital X-rays provide information that optical scanners cannot. The two technologies are complementary, not interchangeable, and most comprehensive treatment plans use both.
Is the iTero scanner covered by dental insurance or the Canadian Dental Care Plan?
Coverage varies by plan. Some insurers treat digital scanning as part of a restorative procedure code, while others require a separate line item. The Canadian Dental Care Plan covers a range of diagnostic and preventive services, and our team can review your specific benefits before your appointment to clarify what is included. We recommend calling ahead so your visit can be planned accordingly.
Can digital X-rays detect gum disease?
Digital X-rays are one of the key diagnostic tools for identifying bone loss associated with periodontal disease. While a clinical probe measurement assesses gum pocket depth, digital radiographs reveal the extent of underlying bone destruction that may not yet be visible or symptomatic. Early identification through routine digital X-rays allows treatment at a stage where non-surgical periodontal therapy is effective, rather than waiting until surgical intervention becomes necessary.
If you have had a digital X-ray or iTero scan experience at Stavanger Dental or elsewhere in St. John's, we would genuinely like to hear what the difference felt like compared to older methods.
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