When Will My Baby’s Teeth Come In?

As with most things with children (as you’ll soon learn), their teeth will start come in when they’re ready.  The age your child is when their teeth first start to come in is not indicative of whether they’re developmentally behind or ahead.  And when you’re up at 3AM with a fussy child who’s cutting his first tooth, you’ll wonder why you ever looked forward to this wonderful event.

 

The average time for the appearance of the first teeth is between 5 and 7 months old.  However, teeth could come in as early as one month or they might not reveal their toothy grin until 1.5 years olds.  In some extreme cases, a child can even be born with teeth!  This typically only happens in about 1 out of every 2,000 newborns, and these are often extra teeth that should be removed.

If teeth are very early or very late to appear, you should take your child to a doctor to make sure that it is not indicative of a more serious complication.  Delayed eruption could be caused by a nutritional problem, such as rickets, or a systemic condition, such a hypopituitarism or hypothyroidism.  If baby teeth appear very early, it could indicate a hormonal problem such as hyperthyroidism.

The following tables outline the normal ranges for teeth to erupt and to shed:

WHEN BABY TEETH FIRST APPEAR

 UpperLower
Central incisors6-8 months5-7 months
Lateral incisors8-11 months7-10 months
Cuspids (canines)16-20 months16-20 months
First molars10-16 months10-16 months
Second molars20-30 months20-30 months

WHEN BABY TEETH FALL OUT

 UpperLower
Central incisors7-8 years6-7 years
Lateral incisors8-9 years7-8 years
Cuspids (canines)11-12 years9-11 years
First molars10-11 years10-12 years
Second molars10-12 years11-13 years

WHEN PERMANENT TEETH FIRST APPEAR

 UpperLower
Central incisors7-8 years6-7 years
Lateral incisors8-9 years7-8 years
Cuspids (canines)11-12 years9-11 years
First premolars (bicuspids)10-11 years10-12-years
Second premolars (bicuspids)10-12 years11-13 years
First molars6-7 years6-7 years
Second molars12-13 years12-13 years
Third molars (wisdom teeth)17-22 years17-22 years

 

***A few facts about baby teeth:

  • A general rule of thumb is that for every 6 months of life, approximately 4 teeth will erupt.
  • Girls generally get their baby teeth before boys.
  • Lower teeth usually come in before upper teeth.
  • Teeth in both jaws usually erupt in pairs — one on the right and one on the left.
  • Primary teeth are smaller in size and whiter in color than the permanent teeth that follow.
  • By the time a child is 2 to 3 years old, all primary teeth should have come in.