Wisdom teeth need to be extracted, if the maximum circumference of the exposed wisdom tooth in the mouth is less than the maximum circumference of the wisdom tooth as a whole, then this wisdom tooth must need to be cut, simply put, the wisdom tooth has resistance, and obstructed teeth need to be cut in the vast majority of cases. Since the wisdom tooth is the last tooth to erupt, the eruption space is mostly insufficient at the time of eruption, and the wisdom tooth with insufficient eruption space will appear to tilt and erupt horizontally. These tilted and horizontally erupted wisdom teeth, if they need to be extracted should be analyzed for dental films and extraction to see the direction of their dislocation, specifically by a professional dentist, but the patient also needs to know that the longest distance of the wisdom tooth can be viewed, while it should be larger than the corresponding exposed longest distance before it does not need to be cut, and if it is small it definitely needs to be cut.