Showing posts with label teeth. Show all posts
Showing posts with label teeth. Show all posts

Friday, March 9, 2012

Baby's First Teeth

    My other post on baby's teeth has been wildly popular with parents who are googling information on their baby's first teeth! I, too, am interested in the subject, so I thought I'd do a little more research.  Last week Q-ball's top teeth started coming in- 4 of them in at once!  But, I was curious because her left central incisor (the upper left tooth) did not seem to be coming in, while both of her lateral incisors (the teeth next to the center teeth...) were coming in. Everything I had previously read always said that the first four teeth were the top and bottom middle teeth.  So, I decided to find out: What is the typical order of deciduous teeth eruption? Or in what order will my baby's first teeth come in?
   I didn't find information that is as specific as I typically like, but I ended up finding some other information to make me slightly more accomplished.  Here's a random smattering of most interesting information I found:
  • Lower teeth typically erupt first- typically around 6 months.
  • Teeth typically emerge in pairs.
  • Girls typically get their baby teeth before boys.
  • The formation of teeth represents two seemingly opposing actions- the creation of bone and the resorption of bone (or the breakdown of bone).  Teeth are fully formed in bone, but most break out of the bone to emerge.
  • A 2000 study published in the Journal of American Academy of Pediatrics found that fever is not associated with teething, despite claims by many parents and pediatricians.
  •  The eruption of teeth changes the composition of saliva in infants. About one month prior to teeth emergence, their is an increase in various proteins that are typically found in human blood, likely indicating the weakening of the gums.  Following the emergence of teeth, the following increase in infant saliva: certain enzymes (namely amylase) that help breakdown food and IgA which is an antibody that helps with immunity.
  • Lower birth weight is associated with later eruption of baby teeth.
Bayer, P. & Beatrix, B. (2000). Tooth eruption. Trends in Biochemical Science, 25(8). 366.
Morzel, M., Palicki, O., Chabanet,C., Lucchi, G., Ducoroy,P., Chambon,C., & Nicklaus, S. Saliva electrophoretic protein profiles in infants: Changes with age and impact of teeth eruption and diet transition. Archives of Oral Biology, 56(7). 634-642.
Sajjadian, N., Shajari1, H., Jahadi, R. Barakat, M., & Sajjadian, A. (2010). Relationship between birth weight and time of first deciduous tooth eruption in 143 consecutively born infants. Pediatrics neonatal, 51(4), 235-237.
Wake, M.,Hesketh, K., Lucas, J. (2000). Teething and tooth eruption in infants: A cohort study. Journal of American Academy of Pediatrics, 106(6). 
Williams, D. (2009, March 15). Teeth eruption charts. Retrieved from

Friday, December 23, 2011

A Baby's First Teeth

Are my two front (bottom) teeth! That's right!  Q-ball's bottom front teeth emerged simultaneously about 10 days ago.  So, I wanted to share some fun or interesting facts about infants' teeth.  Also, it's the holidays, so I'm taking a little bit of a break with this Science Friday post. :) 

  • The technical term for baby teeth is deciduous teeth (just like the trees that loose their leaves.)
  • Streptococcus sanguis (a.k.a. the bacteria that causes dental plaque and, sometimes cavities)  is only found in the human mouth after the first teeth appear.  In the infants studied, the bacteria was found in 100% of infants by 3 months after their first teeth appeared. 
  • The vast majortiy of infants get the bacteria from their mamas.  This is especially true for daughters (88%  of girls share the identical bacterium as their mamas, while 53% of boys do.)  There is no evidence that infants receive the bacterium from their fathers.
  • Some babies are born with teeth (these are called natal teeth), while others develop teeth within the first month of life (called neonatal.)  Natal and neonatal teeth are more common in babies with cleft palate or other syndromes that are present at birth.  But, the teeth are not always a cause for alarm.  It is not necessary to remove natal or neonatal teeth, but they may be removed if they disrupt feedings. 
  • Low-birth weight babies appear to have increased problems with their baby teeth, to include being more porous and containing more "subsurface lesions."
  • There is no evidence that breastfeeding causes an increase in cavities, and some studies have found that breast milk can help prevent cavities.  But, nighttime snacking can be a cause of cavities.
No, this isn't Q-ball- my teeth picture attempts were a fail!
Q-ball only exhibited minor pain with the emergence of these first two teeth.  However, I suspect that her one or both of her top teeth are now coming in, and she does appear to be exhibiting some discomfort.  I am currently giving her a wet washcloth that has been frozen for comfort, but I have also been debating purchasing a baltic amber necklace.  However, I can't find any hard research to support their pain relief claim. But, it seems lots of mothers have had success.

Have you used a baltic amber necklace? Do you think they work?  Do you have any other recommendations for teething pain?

Carlsson, J., Grahnén, H., Jonsson, G., & Wikner S. (1970). Establishment of Streptococcus sanguis in the mouths of infants. Archives of oral biology, 15(12). Retrieved from
Caufield, P.W. & Yi, L. (1995). The fidelity of initial acquisition of mutans Streptococci by infants from their mothers. Journal of Dental Research, 74(2). Retrieved from
Le Leche League International. (2010). The womanly art of breastfeeding. Ballantine Books: NY.
Noren, J. (1983).  Enamel structure in deciduous teeth from low-birth-weight infants. Acta Odontologica Scandinavica. Retrieved from
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