What type of occlusal radiograph requires the patient to wear a thyroid collar?

The upper standard occlusal radiograph requires the patient to wear a thyroid collar because this type of radiographic technique exposes the patient's upper jaw, where the thyroid gland is located in the neck, to X-rays.

By wearing a thyroid collar, the patient is better protected from unnecessary radiation exposure to this sensitive area. The thyroid gland is particularly vulnerable to radiation, making it crucial to shield it during imaging procedures that may pose a risk of radiation exposure.

In contrast, other types of radiographs listed, such as the lower standard occlusal, transverse occlusal, and occlusal bitewing, may not necessitate thyroid collars in the same way. For example, lower occlusal radiographs focus on the lower jaw and are generally less of a concern when it comes to exposing the thyroid, whereas occlusal bitewings are designed to capture a wider view of the dental arches and may incorporate protective measures differently.