Necessarily, the wisdom teeth are the 3rd molars. They usually grow in adults between the ages of 17 to 25 years old. A grownup can have four wisdom teeth. The development of your wisdom teeth is something that happens once you mature yet the only trouble is that the majority of people have wisdom teeth that grow laterally or are impacted. This can be significant trouble since as the wisdom tooth grows; it digs into the jawbone or pushes right into the tooth alongside it.