Glossary
›
Periapical X-ray
P

Periapical X-ray

A periapical X-ray is a dental radiograph that captures the entire tooth, from crown to root tip, along with the surrounding bone.

Understanding 

Periapical X-ray

A periapical X-ray is a type of dental radiograph designed to show the complete structure of a tooth. The image includes the crown, root, and the bone surrounding the root tip, known as the periapical area. This view allows dentists to evaluate the tooth's internal and supporting structures in detail.

Periapical radiographs are commonly used when a dentist needs to investigate a specific tooth or area of concern. They are particularly helpful for identifying infections at the root tip, evaluating root canal anatomy, detecting fractures, and assessing the condition of the surrounding bone. Because the entire tooth is visible, these images provide important diagnostic information that cannot be obtained from bitewing X-rays alone.

Periapical X-rays are frequently used in general dentistry as well as in endodontics, which focuses on the treatment of the tooth pulp and root canal system. They help clinicians monitor dental conditions over time and guide treatment decisions when deeper tooth structures are involved.

Clinical Significance

Periapical X-rays provide detailed visualization of the tooth root and surrounding bone. This allows dentists to detect infections, abscesses, root fractures, and changes in bone around the tooth. The images are also used to evaluate the results of root canal treatment and monitor healing in the periapical region.

How it Works

During a periapical X-ray, a small digital sensor or film is placed inside the mouth near the tooth being examined. The patient gently bites down to hold the sensor in position. An X-ray beam passes through the tooth and surrounding structures, creating an image that shows the crown, roots, and bone around the root tips. The image is then displayed on a computer or imaging system for the dentist to review.

What it's Used For

Periapical X-rays are used to diagnose infections near the root tip, evaluate root canal anatomy, detect root fractures, assess bone around teeth, and investigate tooth pain or trauma affecting a specific tooth.

Benefits

Periapical X-rays provide detailed images of the entire tooth and surrounding bone. This helps dentists diagnose infections, evaluate root structures, monitor treatment outcomes, and identify problems affecting deeper parts of the tooth that may not be visible during a routine exam.

What Patients Can Expect

Taking a periapical X-ray is usually quick and straightforward. A small sensor is placed inside the mouth near the tooth being examined. The patient holds still for a few seconds while the image is captured. The process may be repeated from different angles if multiple teeth or areas need to be evaluated.

Downside

Periapical X-rays focus on a small area of the mouth and therefore do not provide a broad overview of the entire jaw or multiple teeth at once. In some cases, additional imaging such as bitewing X-rays, panoramic imaging, or CBCT scans may be needed to evaluate larger areas or more complex conditions.

Frequently Asked Questions

Q

Why would a dentist take a periapical X-ray?

Dentists may take a periapical X-ray when they need a detailed view of a specific tooth and the bone surrounding it. This type of image helps identify infections at the root tip, evaluate tooth pain, detect root fractures, and assess root canal anatomy. Because the entire tooth is visible, periapical X-rays provide valuable information for diagnosing problems that involve the deeper structures of the tooth.

Q

What is the difference between a bitewing and a periapical X-ray?

Bitewing X-rays primarily show the crowns of the upper and lower teeth and are commonly used to detect cavities between teeth and evaluate bone levels. Periapical X-rays, on the other hand, capture the entire tooth from crown to root tip, along with the surrounding bone. Dentists typically use periapical images when investigating infections, root problems, or other issues affecting the deeper parts of a tooth.

Q

Can a periapical X-ray detect a tooth infection?

Yes, periapical X-rays can help dentists identify signs of infection near the root tip of a tooth. These infections may appear as radiolucent areas around the root apex, indicating changes in the surrounding bone. Dentists use this information along with symptoms and clinical examination findings to determine whether further treatment, such as root canal therapy, may be necessary.

Q

Are periapical X-rays safe?

Periapical X-rays use a small amount of radiation and are considered safe when used appropriately. Modern dental imaging systems are designed to minimize radiation exposure while still producing clear diagnostic images. Dentists recommend X-rays only when they provide useful information for evaluating or monitoring oral health.

Q

How long does it take to get a periapical X-ray?

A periapical X-ray usually takes only a few seconds to capture once the sensor is positioned. The dental team may take one or several images depending on the number of teeth being evaluated. The entire process is typically completed within a few minutes during a routine dental visit.

Browse Glossary

Explore more dental terminology

View All Terms

Medical Disclaimer: This glossary is provided for educational and informational purposes only. Pearl is not a dental or medical provider and cannot offer medical advice, diagnosis, or treatment recommendations. Always consult a qualified dental professional for questions about your oral health.

Consent Preferences