Before the age of 12, the molar teeth are not replaced, and permanent teeth will grow back after they fall out. after the age of 6, the first and second molars will erupt successively, and after the age of 12, all the permanent teeth will erupt, and the big teeth will not grow back after they fall out.
There are two molar teeth in the upper, lower, left and right quadrants of the milk teeth, which will be lost at the age of 10 to 12 years old and replaced by the first and second premolar teeth. 12 years old after the first molar and second molar teeth have all erupted, and if the teeth are lost due to caries or traumas, there will not be any new teeth to erupt again.
When permanent teeth erupt, they are not fully developed, so they are easy to be decayed. Pay attention to brushing your teeth on time every day, and do fissure sealing surgery in time to protect your teeth. Regular oral examination.