Oral exams should be performed at each well child visit, with formal risk assessment starting at 6 months of age.
Small children are best examined while lying down. For infants and toddlers, the knee-to-knee oral examination allows you to carefully examine the child's teeth with assistance from a caregiver. If the child's legs don't fit around the caregiver's body, the child may lie sideways or diagonally on the caregiver's lap.
For detailed info about the oral exam, including differences between primary and permanent teeth, see Smiles for Life Oral Examination module.