To determine whether there are wisdom teeth or not, you can go to the hospital to take X-rays and observe them, or you can make a general judgment by the position and shape of the teeth after knowing certain basic knowledge. Wisdom teeth are located at the end of the tooth row in the oral cavity, and there is often the phenomenon of obstruction in the oral cavity, which may cause wisdom teeth pericoronitis, usually erupted around the age of 18 to 25 years old, and the morphology of the oral cavity is manifested as the crown of the tooth toward the jaw surface, compared with the front of the molar teeth are smaller, so you can judge roughly by the time and location, morphology. After the tooth replacement is completed, if there is no tooth missing, you can count from the center incisor to the side, and the wisdom tooth is the eighth tooth. If there are only seven, there are no wisdom teeth, and if there is an eighth, there are wisdom teeth. You can also go to the hospital to take x-rays to confirm that wisdom teeth are also called third molars, and you can clearly see whether there is a third molar behind the first and second molars on the x-ray.