Both cells have same functions. The galvanic cell consist of two different metals connected by salt bridge. It is also known as electrochemical cell. It should not be confused with electrolytic cell. Voltaic cell also consist of two separate compartments.
But very oftenly, you get them from age 17-21. So yeah it depends if you already have your 12 yearold molars, I will edit if you say something! But here is ome more info on wisdom teeth! Wisdom Teeth get their name because they usually arrive about the time of adulthood (17-21 years of age).
With the exception of the wisdom teeth, the last of the secondary teeth come in around 12 years of age. Tooth eruption can be variable. It is time to do something! Most experts think that by 6 years of age, when the second teeth start to come in, is the proper age to treat the habit. We like to see the habit discontinued because it can push the new teeth into poor alignment. Finger sucking encourages the upper teeth to protrude.