Baby Teeth and Toothbrushing: When to Start and How to Make It Work

Baby teeth matter more than many parents realise. Even though they'll eventually fall out, they hold space for adult teeth, affect speech development, and their health sets patterns that carry through to permanent teeth. Starting good habits early is far easier than introducing them later.

When do first teeth appear?

Most babies cut their first tooth between 4 and 12 months. The average is around 6 months — but anywhere from 3 to 14 months is within normal range.

Typical order of eruption:

1. Lower central incisors (bottom front teeth) — first
2. Upper central incisors (top front teeth) — shortly after
3. Upper lateral incisors
4. Lower lateral incisors
5. First molars
6. Canines
7. Second molars

By age 3, most children have all 20 primary (baby) teeth.

When to start brushing

Start as soon as the first tooth appears — even if it's just a tiny white dot emerging through the gum.

Before teeth appear, you can wipe baby's gums with a damp muslin cloth — this starts to familiarise them with mouth cleaning, though it's not essential.

Which toothpaste to use

For babies and children under 3: Use a smear (grain-of-rice-sized amount) of fluoride toothpaste containing at least 1000ppm fluoride (check the label). The NHS recommends this — it's not the same as adult toothpaste dosage but the same fluoride concentration.

From 3–6 years: A pea-sized amount of 1000–1500ppm fluoride toothpaste.

Avoid: Fluoride-free "natural" toothpastes for babies — fluoride is the active ingredient that protects enamel. The amount in a smear is too small to be harmful if swallowed.

Popular UK baby toothpaste brands meeting NHS recommendations: Colgate Little Ones, Oral-B Baby, Brush-Baby.

Toothbrushing technique

• Use a soft-bristled baby toothbrush (age-appropriate — heads are very small)
• Twice a day — last thing before bed is the most important (no food or drink after, other than water)
• Brush for 2 minutes — use a timer or hum a song
• Gentle circular or small back-and-forth motions on all surfaces
• Spit but don't rinse — let the fluoride work on the teeth (this is counterintuitive but correct)

How to manage resistance

Many babies and toddlers hate teeth brushing. This is completely normal. Strategies that help:

Make it routine: Same time, same sequence, every day. Predictability reduces resistance.

Give some control: Let baby hold a spare toothbrush while you brush. Let them "brush" first, then you finish. Sing a consistent song every time.

Distraction: Favourite song, nursery rhyme, video on a phone — whatever works.

Position for small babies: Try brushing in a reclining position in your lap, head supported.

Positive language: "Let's make your teeth sparkly!" rather than "It's time to brush your teeth" (which they know means a fight is coming).

Mirroring: Brush your own teeth at the same time. Babies imitate.

Tooth-brushing apps and songs: The NHS Brush DJ app randomises songs for a 2-minute brush.

If your baby bites down on the brush: wait. Don't wrestle. Try a different angle. Get the bits you can.

Early childhood dental decay — it matters

Early childhood caries (tooth decay in babies and toddlers) is the most common chronic disease of childhood in the UK and is almost entirely preventable.

Key risk factors:

• Sleeping with a bottle of milk or juice (milk contains sugar — after feeding, brush or wipe gums)
• Prolonged use of a bottle beyond 12 months
• Fruit juice or sweet drinks in bottles
• Grazing on sweet foods throughout the day

Decayed baby teeth can cause pain, affect eating and speech, and often require extraction under general anaesthetic — a procedure with risks that is happening tens of thousands of times a year in UK children.

NHS dental care

NHS dental care is free for children under 18 in the UK. Register your baby with a dental practice as soon as they have teeth — many practices accept children from birth. The British Dental Association recommends a first dental visit when the first tooth appears.

Your child doesn't need to sit in the chair or be examined at the first visit — just getting comfortable with the environment is enough.

Fluoride varnish

NHS dentists apply fluoride varnish to children's teeth at regular check-ups — typically every 6 months from age 3, or earlier for high-risk children. It's quick, painless, and significantly reduces decay risk.