The normal human is usually 28-32 teeth, if all wisdom teeth erupt, it is 32 teeth, but nowadays many people’s wisdom teeth may be blocked and cannot erupt into the oral cavity, and they cannot be examined in the oral cavity, so they will show 28 teeth. There are some individual wisdom teeth eruption will show 28-32 teeth, many people nowadays also have wisdom teeth missing, wisdom teeth did not develop, congenitally missing. There are other teeth that are clinically missing as well as the possibility of obstruction. Therefore, under normal circumstances, people have 28-32 teeth, if the wisdom teeth do not erupt or missing, it is considered normal, if other teeth are missing or obstructed, you need to go to the clinical examination for treatment, and some obstructed wisdom teeth can be considered for extraction.