What are the Limitations of Dental X-rays

The use of different types of X-rays in dentistry comes with specific limitations.

Conventional bitewing radiography:

Accurate detection and diagnosis of carious lesions are essential for implementing the most effective caries management strategies. Among the various diagnostic aids available, bitewing radiographs are considered the gold standard for identifying proximal carious lesions.

Pitfalls and complications
• Bitewing radiography does not help detect caries on smooth surfaces (buccal and lingual).
• Changes in X-ray projection can cause some carious lesions to falsely appear as ‘progressing’ or ‘regressing’.
• Ionizing radiation is a major pitfall of bitewing radiography and limits its repeatability and application in young children.
• Bitewing radiography poses a risk of under-detection for early proximal lesions.
• Bitewing radiography carries an increased risk of underestimation of lesion extension in occlusal lesions.

Panoramic X-ray:

A panoramic X-ray does not provide precise, detailed information about each tooth or soft tissue, such as muscles. It is generally utilized as an initial evaluation of the bones and teeth. Due to the curvature of the mouth, the panoramic X-ray may sometimes produce a slightly blurry image, making it impossible to accurately measure the teeth and jaw.

Cone Beam CT:

While cone beam computed tomography (CBCT) has quickly become popular in dentistry, it does have several drawbacks. These issues may stem from the “cone-beam” projection geometry, detector sensitivity, and contrast resolution. Artifacts, noise, and insufficient soft tissue contrast can compromise the clarity of CBCT images. Additionally, CBCT units generally have less soft tissue contrast compared to conventional CT machines.