Dental X-Rays: What They Are and Why They Matter

Dental X-rays (radiographs) are images of your teeth, bone, and surrounding tissues that let your dentist see what’s invisible to the naked eye. They are one of the most valuable diagnostic tools in modern dentistry — catching problems early, when they’re easier and less expensive to treat.

Why dental X-rays matter

A visual exam only shows the surfaces of your teeth. X-rays reveal what’s happening between teeth, below the gumline, and inside the bone:

• Cavities forming between teeth or under existing fillings
• Bone loss from gum disease
• Infections at the root of a tooth
• Impacted teeth, cysts, and some tumors
• The position of developing teeth in children

Types of dental X-rays

• Bitewing — shows the crowns of upper and lower teeth in one area; the standard for detecting cavities between teeth.
• Periapical — shows an entire tooth from crown to root tip; used to diagnose root and bone issues.
• Panoramic — a single image of the entire mouth, including the jaws and sinuses; useful for implant and extraction planning.
• Cone Beam CT (3D) — a three-dimensional scan used for complex implant, surgical, and orthodontic planning.

How much radiation is involved?

Modern digital X-rays use up to 90% less radiation than traditional film, and the dose is extremely low — a set of bitewings is comparable to the radiation you’d receive on a short airplane flight. We follow the ALARA principle (“As Low As Reasonably Achievable”), using a lead apron and only taking the images you actually need.

How often will I need them?

It depends on your age, oral health, and risk factors. Many healthy adults need bitewings about once a year, while patients with active issues may need them more often. We’ll always explain why an X-ray is recommended before taking it.