The third mandibular molar, also known as the wisdom tooth, is the most common obstructive tooth. So what do we mean by an interrupted tooth? An obstructed tooth is a tooth that does not erupt normally now and is unlikely to erupt in the future. Some people believe that wisdom teeth are related to intelligence, so they are determined not to remove them. So should wisdom teeth be removed or not? First of all, the presence of an obstructed wisdom tooth in the jaw may lead to a common disease called pericoronitis. It occurs mostly in young people and can usually manifest clinically as oral odor, localized gum swelling and pain, difficulty in opening the mouth, and in severe cases can extend to oral and maxillofacial interstitial infection, which will seriously affect a person’s life. During the patient’s visit, they are usually told “you have wisdom teeth”, however, the root cause is the presence of wisdom teeth, resulting in inflammation of the soft tissue around the crown of the wisdom teeth. Secondly, the mandibular blocked wisdom tooth can be tilted forward, called “proximal mesial block”, and its crown forms a triangle with the crown of the mandibular second molar, in this area, it is easy to cause food residue, and it is not easy to clean, leading to decay of the wisdom tooth itself and the mandibular second molar, i.e. tooth decay. Due to the anterior inclination of the wisdom tooth, it may lead to bone deficiency of the second molar, thus causing its loosening and pain. In addition, due to the long-term presence of wisdom teeth and pressure, it is easy to cause the second molar pressure root resorption, which will lead to the loosening and pain of the second molar, and in serious cases, it needs to be extracted. Third, due to the presence of wisdom teeth, it may lead to the occurrence of odontogenic cysts, such as tooth-containing cysts of wisdom teeth. In addition, some scholars now believe that dental crowding and misalignment may also be related to the presence of wisdom teeth. Of course, not all wisdom teeth need to be extracted. For example, some people have a wide dental arch with enough space for wisdom teeth to erupt properly and to perform chewing functions. Secondly, the second mandibular molar can be retained if, for various reasons, it is already missing and the wisdom tooth is not tilted very much. Finally, wisdom teeth that can only be detected by x-ray, the so-called ambiguous obstructed wisdom teeth, which are completely asymptomatic clinically, can also be temporarily left untreated. There are many risks associated with the removal of wisdom teeth. The most serious of these is damage to the inferior alveolar nerve, causing temporary or permanent numbness of the lower lip on the affected side. However, in general, it is better to have wisdom teeth removed.