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Eruption of Your Child’s Teeth

The eruption of primary teeth (also known as deciduous or baby teeth) follows a similar developmental timeline for most children.  A full set of primary teeth begins to grow beneath the gums during the fourth month of pregnancy. For this reason, a nourishing prenatal diet is of paramount importance to the infant’s teeth, gums, and bones.

Generally, the first primary tooth breaks through the gums between the ages of six months and one year.  By the age of three years old most children have a “full” set of twenty primary teeth.  The American Dental Association (ADA) encourages parents to make a “well-baby” appointment with a dentist approximately six months after the first tooth emerges.  Dentists communicate with parents and children about prevention strategies, emphasizing the importance of a sound, “no tears” daily home care plan.

Although primary teeth are deciduous, they facilitate speech production, proper jaw development, good chewing habits - and the proper spacing and alignment of adult teeth.  Caring properly for primary teeth helps defend against painful tooth decay, premature tooth loss, malnutrition, and childhood periodontal disease.

In what order do primary teeth emerge?

As a general rule-of-thumb, the first teeth to emerge are the central incisors (very front teeth) on the lower and upper jaws (6-12 months).  These (and any other primary teeth) can be cleaned gently with a soft, clean cloth to reduce the risk of bacterial infection.  The central incisors are the first teeth to be lost, usually between 6 and 7 years of age.

Next, the lateral incisors (immediately adjacent to the central incisors) emerge on the upper and lower jaws (9-16 months).  These teeth are lost next, usually between 7 and 8 years of age.  First molars, the large flat teeth towards the rear of the mouth then emerge on the upper and lower jaws (13-19 months).  The eruption of molars can be painful.  Clean fingers, cool gauzes, and teething rings are all useful in soothing discomfort and soreness. First molars are generally lost between 9 and 11 years of age.

Canine (cuspid) teeth then tend to emerge on the upper and lower jaws (16-23 months).  Canine teeth can be found next to the lateral incisors, and are lost during preadolescence (10-12 years old).  Finally, second molars complete the primary set on the lower and upper jaw (23-33 months).  Second molars can be found at the very back of the mouth, and are lost between the ages of 10 and 12 years old.

What else is known about primary teeth?

Though each child is unique, baby girls generally have a head start on baby boys when it comes to primary tooth eruption.  Lower teeth usually erupt before opposing upper teeth in both sexes.

Teeth usually erupt in pairs – meaning that there may be months with no new activity and months where two or more teeth emerge at once.  Due to smaller jaw size, primary teeth are smaller than permanent teeth, and appear to have a whiter tone.  Finally, an interesting mixture of primary and permanent teeth is the norm for most school-age children.

If you have questions or concerns about primary teeth, please contact your dentist.

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Testimonials

I have been a patient of Dr. Jeffrey Weiner since 1981. His work is impeccable. He is meticulous and results focused. He is not happy unless you are happy. I have referred many patients over the year to his office. His staff is always accommodating and friendly. I have had to call him and his son Dr. Jason Weiner on weekends and holidays over the years for a dental emergency and they have both responded to me quickly and with concern and advice. I receive compliments every day about my smile and it is because of Weiner Dental.

Mary P., Bensalem, PA

I know from experience that patients at Weiner Dental are very fortunate in knowing that "the apple doesn't fall far from the tree." Dr. Jason Weiner is my primary dentist. He is not only adept in the painless and creative cosmetic work that he has performed on me, his easy manner and confident professionalism allays any anxiety that I may have about any dental problems. Having also been treated by Jason's father, Dr. Jeffrey Weiner, it is evident that a caring attitude and a healing aptitude has been passed on from father to son. That same demeanor seems to be instilled in everyone at Weiner Dental. I sincerely recommend the doctors and staff at Weiner Dental. I believe that they really care.

Edward M., Huntingdon Valley, PA

I have been going to Doctor Weiner for 30 years along with my wife and children. He has always given us the best of care. I do not know t oo many doctors who care so much that they call you at home to check on you. He cares about all people. When Dr. Weiner heard we were going to visit our daughter (who is a missionary in Jaraboca, in the Dominican Republic), he sent dental supplies for the folks down there. Most of them do not have the money for toothbrushes and toothpaste. If you could have seen the look of joy on their faces...it's hard to describe. And his son Jason is following in his father's footsteps. I not only feel like I have a great dentist but a good friend! Thanks Docs.

Robert B., Philadelphia, PA

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