Dental Admissions Test (DAT) Practice Test

Define the term "bitewing radiograph."

1. An X-ray for detecting gum disease

2. An X-ray for detecting cavities between teeth

3. An X-ray for evaluating tooth alignment

4. An X-ray for root canal therapy

The correct answer is: An X-ray for detecting cavities between teeth

The definition of a "bitewing radiograph" is specifically related to its purpose in dental imaging, which is to detect cavities between teeth. This type of X-ray captures a view of the upper and lower teeth in one area of the mouth simultaneously, allowing dentists and dental professionals to identify caries that may not be visible during a routine examination. Bitewing radiographs are particularly effective at showing interproximal surfaces—the areas where adjacent teeth touch—making them an essential tool in preventative dentistry and for monitoring the progression of tooth decay. By capturing this specific area, the bitewing contributes to early detection and treatment of cavities, which is crucial in maintaining oral health. While other options mention important aspects of dental care, they describe different types of radiographs or procedures. For instance, an X-ray for detecting gum disease typically utilizes panoramic or periapical radiographs, which provide a broader view of the jaw and bone structures. Evaluating tooth alignment may involve orthodontic films or panoramic radiographs, which show the positioning of teeth and jaw relationships. Lastly, x-rays for root canal therapy would focus on periapical, as they provide detailed images of the tooth roots and surrounding bone. Thus, bitewing radiographs have a distinct and critical role