How X-Rays Are Used During a Dental Health Check
Dental X-rays are one of the most valuable diagnostic tools available to your dentist, and they play a central role in a thorough dental health check. While a visual examination can reveal a great deal about the condition of your teeth and gums, it only tells part of the story. The structures beneath the surface — the roots of your teeth, the surrounding bone, and the spaces between your teeth — remain invisible to the naked eye. X-rays change that, giving your dentist a complete picture of your oral health that simply cannot be achieved any other way.
At Gorgie Road Dental Practice, dental X-rays are used selectively and thoughtfully. Not every patient needs X-rays at every appointment, but when they are taken, they provide information that can catch problems at a very early stage, often before any symptoms appear. Early detection is the cornerstone of preventive dentistry, and X-rays are a key part of making that possible.
What Dental X-Rays Can Detect
The list of conditions that dental X-rays can reveal is extensive. Decay between teeth — known as interproximal decay — is one of the most common findings. This type of cavity develops in the contact point between two adjacent teeth, a location that cannot be seen or probed effectively without an X-ray image. By the time interproximal decay causes noticeable symptoms such as sensitivity or pain, it may already be advanced enough to require a more involved treatment.
Beyond decay, X-rays allow your dentist to assess the health of the bone supporting your teeth. Bone loss is a hallmark of periodontal (gum) disease, and X-rays can reveal the extent of bone changes long before a tooth becomes loose. Abscesses — painful infections at the root of a tooth — also show up clearly on X-ray images, as do cysts, impacted teeth, and in some cases abnormal growths. For patients undergoing orthodontic treatment or planning dental implants, X-rays provide essential information about root positions and available bone volume.
Types of Dental X-Rays
There are several different types of dental X-ray, each suited to examining different aspects of your oral health. Your dentist will select the most appropriate type based on what they need to assess.
- Bitewing X-rays — These are the most common type taken during a routine check-up. They show the upper and lower back teeth in a single image and are particularly useful for detecting decay and assessing bone levels between the teeth.
- Periapical X-rays — These show the entire length of one or two teeth, from crown to root tip, along with the surrounding bone. They are used when a specific tooth needs closer examination, for example if an abscess or root problem is suspected.
- Panoramic X-rays (OPG) — These produce a wide view of the entire mouth, including all the teeth, both jaws, the sinuses, and the temporomandibular joints. They are often taken when planning orthodontic treatment, investigating impacted wisdom teeth, or getting a broad overview of oral health.
- Cone Beam CT (CBCT) — A three-dimensional imaging technique used for more complex assessments, such as implant planning or detailed bone evaluation.
How Safe Are Dental X-Rays?
Radiation safety is a common concern among patients, and it is entirely understandable. The good news is that dental X-rays involve very low doses of radiation — considerably lower than many other medical imaging procedures. Modern digital X-ray equipment has further reduced radiation exposure compared to older film-based systems. Lead aprons and thyroid collars may be offered for additional protection, particularly for children or patients who require multiple images.
According to NHS Inform Scotland, dental X-rays are a routine part of a check-up and allow your dentist to identify problems that are not visible during a standard visual examination, including decay, impacted teeth, jawbone damage, cysts, and abscesses. The guidance also notes that X-rays during pregnancy should only be performed in emergency situations, which is why dentists will always ask about pregnancy before taking any radiographs.
How Often Are X-Rays Taken?
The frequency of dental X-rays is determined by your individual circumstances rather than a fixed schedule. Patients who have a history of decay or gum disease, or who are undergoing active treatment, may need X-rays more often. Those with good oral health and a low risk of problems may only need them every couple of years. Your dentist will recommend a frequency that is appropriate for you based on a clinical assessment of your needs.
| X-Ray Type | What It Shows | Common Use |
|---|---|---|
| Bitewing | Upper and lower back teeth, bone levels between teeth | Decay detection, routine check-up |
| Periapical | Full tooth from crown to root tip | Root problems, abscesses, bone changes around a specific tooth |
| Panoramic (OPG) | All teeth, both jaws, sinuses, TMJ | Wisdom teeth, orthodontics, broad assessment |
| Cone Beam CT | 3D view of teeth and bone | Implant planning, complex cases |
What Happens After an X-Ray?
Once your X-rays have been taken, your dentist will review them carefully, often using a computer screen to magnify the images and highlight areas of interest. They will then explain their findings to you in plain language, pointing out anything that requires attention and discussing the options available. If everything looks healthy, you will simply be given a scheduled date for your next review. If a problem is identified, treatment can be planned promptly, before the issue becomes more serious or more expensive to address.
Preparing for Your Appointment
There is nothing special you need to do to prepare for dental X-rays — no fasting or special instructions are required. Simply attend your appointment as usual, inform your dentist if you are pregnant or think you might be, and let the team know if you have any concerns. The whole process is quick and painless, and most X-rays are completed within a minute or two.
If you have not had a dental health check recently, or if you have questions about what to expect during one, we would be delighted to help. At Gorgie Road Dental Practice, our team takes a comprehensive approach to every check-up, using digital X-rays where appropriate to ensure nothing is missed. Get in touch with us on 0131 337 3936 to book your next appointment.