Some people only get one wisdom tooth, while others get two, three, four, or none. It is not uncommon for a person to have more than four wisdom teeth. In this case, the extra teeth are referred to as supernumerary teeth. The number of wisdom teeth you develop is also influenced by genetics. According to studies, at least 53% of people have at least one wisdom tooth emerge. If you don't have any wisdom teeth, that doesn't mean they aren't present. Sometimes wisdom teeth never erupt and are never visible. In this case, an x-ray can determine whether you have wisdom teeth under your gums.