X-Rays (Radiographs) In general, children need X-rays more often than adults. Their mouths grow and change rapidly. X-rays can often show weaknesses in the tooth structure (such as demineralization) that may not be visible with the naked eye. The American Academy of Pediatric Dentistry recommends X-ray examinations every six months for children with a high risk of tooth decay. Children with a low risk of tooth decay require X-rays less frequently. We use digital radiography which uses approximately 1/4 the radiation of the traditional dental x-rays.