Most people call them “wisdom teeth” or “end teeth”, which grow after the age of 18, and there are 4 teeth in total, but due to the refinement of human diet, the jawbone exercise is reduced, and the jawbone becomes shorter, and some of them even don’t have the wisdom teeth’s eruption position, or there are permanent teeth embryos, which don’t have enough position for “wisdom teeth” to start looking for a position to erupt. However, due to the refinement of the human diet, the jawbone becomes shorter and shorter, and some of them even do not have the position for wisdom teeth to erupt, or there is a permanent embryo, but there is not enough position for the “standing teeth” to begin to look for a position for the teeth to erupt, which results in the difficulty of eruption of the teeth in the clinic, and the difficulty of eruption of the teeth is also known as the “blocked teeth” or “ambulatory teeth”. The most common type of blocked tooth is the mandibular third molar, which erupts at about 18 years of age, so it is called “blocked wisdom teeth”. So, what are the hazards of wisdom teeth on the human body? 1, wisdom teeth pericoronitis: wisdom teeth due to obstruction of the crown can not be completely exposed, the gums around the crown into a pocket, it is very easy to accumulate food, nourishing bacteria. When the systemic resistance drops, it causes acute pericoronitis. 2.Interstitial infection: the inflammation of pericoronitis may further spread to the muscle interspace causing interspace infection. 3.Second molar caries: Forward tilted impacted wisdom teeth are prone to caries of neighboring teeth (mandibular second molar) due to frequent accumulation of food between neighboring teeth. 4, other: blocked wisdom teeth may also form odontogenic jaw cysts, osteomyelitis and temporomandibular joint disease. So, like this kind of trouble, “the standing problem teeth” how to deal with it, need to be extracted, the answer is that in addition to the opposite jaw teeth have a good occlusal relationship, the other wisdom teeth should be removed, once and for all, to eliminate the problem forever.