Thank you for the links. It makes sence why the lower teeth are doing much better.
My son has only been breastfed all this time, and never slept with a bottle. It is then my milk that is destroying his teeth...
I have now started to wean him gradually from breastfeeding, which is another problem to be discussed in another topic.
The only strange thing that is still unclear for me is: why were the teeth so weak and soft when they were coming out first? Teeth on the pictures from the above mentioned links look like they were good and then got decayed.
Another question is: Are the future teeth going to be as weak?
Providing that I always had had problems with my teeth, but my husband in the contrary has been to a dentist very few times in his life.