Why Are My Child’s Teeth Not Growing In?

If your child’s teeth are not growing in, it is often part of normal development. Some babies get their first tooth as early as 4 months, while others do not until 15 months. Permanent teeth usually begin replacing baby teeth around age 6. Delayed tooth eruption can also be caused by genetics, retained baby teeth, lack of space, impacted teeth, nutritional deficiencies, or, less commonly, certain medical conditions. A pediatric dentist can determine whether the delay is normal or needs treatment.

Is It Baby Teeth Or Permanent Teeth That Are Delayed?

The answer depends on your child’s age.

• Babies: The concern is delayed eruption of the first baby teeth.
• Older children: The concern is usually that permanent teeth are taking longer to replace baby teeth.

Although the causes are different, both situations benefit from a professional evaluation if teeth are significantly delayed.

Baby Teeth Haven’t Come In Yet

Most babies get their first tooth at around 6 months, but anything between 4 and 15 months can be normal. By around age 3, most children have all 20 primary teeth.

Common Causes

A late first tooth is often due to:

• Family genetics
• Premature birth or low birth weight
• Vitamin D or calcium deficiency
• Less commonly, hormonal or genetic conditions

Most children with delayed baby teeth are otherwise healthy.

When Should Parents Be Concerned?

Arrange a dental evaluation if:

• Your baby has no teeth by around 12 months
• Teeth seem very delayed compared with overall growth
• There are concerns about nutrition or development

Permanent Teeth Haven’t Come In

Permanent teeth usually begin erupting around age 6. Sometimes a baby tooth falls out but the adult tooth takes longer than expected to appear.

Common Causes

Delayed permanent teeth may be caused by:

• Lack of space or crowding
• A retained baby tooth
• An impacted tooth
• Extra (supernumerary) teeth blocking eruption
• Teeth developing in the wrong direction
• Certain medical or genetic conditions

A useful guide is the 6-month rule. If one permanent tooth has erupted and the matching tooth on the opposite side has not appeared within about six months, it should be evaluated.

How Does A Pediatric Dentist Find The Cause?

The first step is a careful examination. If needed, digital X-rays help determine whether the tooth is:

• Developing normally
• Impacted beneath the gums
• Missing from birth
• Blocked by another tooth
• Delayed because of crowding

This allows the pediatric dentist to recommend the most appropriate treatment.

Treatment Options

Treatment depends on the reason for the delay. It may include:

• Monitoring if eruption is progressing normally
• Removing a retained baby tooth
• Orthodontic guidance to create space
• Surgical exposure of an impacted tooth
• Referral to a medical specialist if an underlying condition is suspected

Many delayed teeth simply need time and regular monitoring.

When Is It Not A Cause For Concern?

A delayed tooth is often completely normal if:

• Other aspects of growth are progressing well.
• There is a family history of late tooth eruption.
• X-rays show the tooth is developing normally.

Your pediatric dentist may simply recommend regular reviews.

When Should You Book An Appointment?

Arrange an evaluation if:

• Your baby has no teeth by about 12 months.
• A permanent tooth has not appeared several months after the baby tooth is lost.
• One matching tooth has erupted but the other has not after six months.
• Your child has pain, swelling, or difficulty chewing.
• You notice crowding or unusual tooth development.

Early evaluation often prevents more complex treatment later.

Frequently Asked Questions

Is it normal for a one-year-old to have no teeth?

Some children naturally develop teeth later than others. However, if no teeth have appeared by around 12 months, it is sensible to arrange a pediatric dental evaluation.

Why hasn’t my 7-year-old’s permanent tooth come in?

Common reasons include crowding, a retained baby tooth, or an impacted tooth. A dental examination and X-rays can identify the cause.

Can delayed tooth eruption be hereditary?

Yes. Children often follow a similar eruption pattern to their parents.

Can vitamin deficiencies delay teeth coming in?

They can. Low vitamin D or calcium may contribute to delayed tooth eruption, although genetics is a much more common cause.

Can a baby tooth stop the adult tooth from coming through?

Yes. A retained baby tooth can sometimes block or delay the permanent tooth underneath.

What is an impacted tooth?

An impacted tooth is a tooth that cannot erupt normally because it is blocked or growing in the wrong direction.

Will my child need X-rays?

Not always. X-rays are only recommended when they are needed to understand why a tooth has not erupted.

Can delayed teeth be treated?

Yes. Many cases only need monitoring, while others may require orthodontic guidance or treatment to help the tooth erupt normally.