Preschoolers are ready for their first bitewing X-rays (usually age 4–5), and can start brushing with parental supervision. It's also the window to break persistent thumb, pacifier and tongue-thrust habits before they reshape the bite.
Cavities between molars are common at this age and need bitewing X-rays to catch — they're invisible from the outside.
Milestones
- 3 y: routine cleanings & fluoride
- 4–5 y: first bitewing X-rays
- By 5 y: break thumb/pacifier habits
Key risks at this stage
- Between-teeth cavities (interproximal)
- Anterior open bite from persistent habits
- Dental anxiety if care is rushed
Parent tips that actually work
- Supervise brushing — kids still lack the dexterity
- Start flossing where teeth touch
- Stop thumb/pacifier by age 4
- Book first bitewing X-rays around age 4
Red flags — see a dentist
- • Persistent thumb-sucking past age 4
- • White spots progressing to brown
- • Reluctance to open mouth for parent