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).
There are usually four of them, right at the back of the mouth. Around 25% of people will not have at least one of of the usual four wisdom teeth. If a wisdom tooth is going to erupt and emerge it will typically do so by 25 years of age.