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).
1 In younger people (late teens and early 20s), the wisdom tooth's roots are not fully developed and the jaw bone is not as dense, so it is easier to remove the tooth. The easier it is to remove the tooth, the easier your recovery is likely to be.  Most problems with wisdom teeth develop between the ages of 15 and 25.