What's the nonfinancial purpose of dental x-rays?

Diagnosis. Diagnosis of those areas which are not visible during the clinical exam. We often detect decay, abscesses, bone defects, tumors, progressive bone loss, and other dental diseases and abnormalities. By detecting them early the prognosis is often much better.
Diagnosis. X-rays allow the dentist to see things that are not apparent in the clinical exam. We can detect decay in between the teeth, bone loss, and many other pathologies. In order to provide treatment, your dentist must be able to fully diagnose your needs. In order to do this, we need to take x-rays, do a good clinical examination and take the patient's health history and symptoms into account.
Diagnosis and Record. X-rays are an important tool for dentists to diagnose dental diseases. The dental X-rays also have been used as a record for Medicolegal Investigation.
Financial? Dentists take radiographs (x-rays) and perform many types of examinations (visual, oral cancer-velscope, periodontal, diagnodent, occlusal, etc) not for financial reasons (no one will ever get rich taking dental x-rays). We take them to have as much patient information possible so that we may discover problems earlier and diagnose more thoroughly.
Better diagnosis. The dentist better treat the person using dental x-rays. He or she can diagnose what is happening in someone's mouth if all the structures can be seen.