Without x-rays, you cannot see decay in between the teeth, screen for abscesses (infections), evaluate bone level or screen for bony lesions. It is a well worn adage in medicine that if you’re not looking for something, you’re not going to find it. I’d rather know what I’m dealing with and find problems before they find me!
Dental x-rays do give you a dose of radiation, but the latest techniques minimize that dose. In our office we used the fastest x-ray film available. The dosage used to expose that film is equal to the dosage used in digital x-ray units.