At what age do teeth erupt?
The temporary or deciduous ("baby" teeth) dentition is made up of 20 pieces (10 of each arch - lower and upper, 5 in each quadrant) starting between 6 and 12 months, and is completed approximately at the age of 3 years (36 months).
However, in the vast majority of children in whom the chronology separates somewhat from what is said, it is not usually an indication of any disease, in general.
Chronology of the final dentition
The final dentition is made up of 32 pieces (16 from each arch - lower and upper, 8 in each quadrant) starting after the fall of the temporary pieces, and is completed between the ages of 21 and 25.
The definitive dentition adds to the temporary pieces, 3 molars (or wisdom teeth) in each quadrant, following the first molars or premolars.
What are the symptoms of eruption of the first teeth?
The eruption of the first teeth is often related to various symptoms such as: fever, irritability, crying, increased salivation, difficulty sleeping and diarrhea. Consider the following:
There is no scientific basis that the eruption of the teething has anything to do with these symptoms.
These symptoms should not be blamed on the teething, there are certainly other causes even if they are sometimes not easy to identify.
It is not advisable to rub the gums with medicines, creams or gels, nor to give medicines for fever such as acetaminophen or ibuprofen, nor products, in general falsely, "natural". You can use some teethers, and be patient, they are temporary annoyances. In general, these discomforts do not need to be discussed with your pediatrician, but if you need advice, go to your pediatric nurse.
When and how to start brushing?
You should start brushing your teeth as soon as the first tooth appears. However, remember that dental health is basically based on healthy eating habits.
The following table schematically shows when and how to do dental hygiene based on the recommendations of the American Dental Association and the American Academy of Pediatrics, both in 2014.
How to use the toothbrush?
Watch these videos made by dentists, either with classic toothbrush or electric toothbrush.
What kind of toothpastes should I use?
Use a fluoride toothpaste for children up to 6-8 years of age (variable fluoride content, generally 1000-1450 ppm).
Then you can use the same paste as the whole family. Buy a correctly labelled paste with an identified manufacturer.
How to avoid excessive fluoride intake?
Use a toothpaste with clear and reliable labelling of its components. Use a toothpaste for children up to 6-8 years of age.
The process of brushing teeth and using toothpaste should be supervised by parents.
Keep toothpaste out of the reach of young children.
Control the amount of toothpaste used by children:
Like a grain of rice up to age 3.
Like a pea from the age of 3.
Avoid rinsing the mouth after washing with toothpaste, as the smallest will easily swallow part of the contents.
(This post is based on the wikipedia paper entitled: "Alimentación infantil e Higiene Dental". https://es.wikibooks.org/wiki/Alimentaci%C3%B3n_infantil/Higiene_dental)