The necessity of extraction of obstructive teeth Obstructive teeth is a clinical term, which is generally known as rootless teeth, wisdom teeth and so on. Due to the modern people eat more and more fine food and jaw bone development degeneration, resulting in the third molar growth space is not enough, easy to cause the third molar can not erupt normally, will produce a series of adverse effects. 1, due to the abnormal position of the blocked teeth, resulting in abnormal gap with the adjacent teeth, easy to lead to food embedding, such as can not be effectively cleaned in time will lead to adjacent teeth and blocked teeth caries, over time, resulting in pulpitis, apical inflammation, resulting in pain in the affected area, gum swelling, affecting the function of eating. 2.The abnormal gap between the blocked teeth and the neighboring teeth will lead to the resorption of the alveolar bone behind the neighboring teeth, if the degree is serious, it will lead to the loosening of the neighboring teeth, swelling and pain of the gums, and the neighboring molars may be extracted. 3.In some cases, the root of the adjacent tooth will be pressed by the blocked tooth, resulting in root resorption of the adjacent tooth and secondary pulpitis, which seriously requires extraction of the adjacent molar. 4.In addition, clinically, we may encounter cysts and benign tumors in the jaw bone caused by obstructed teeth, which require surgical treatment. Of course, not all obstructed teeth need to be extracted. The following cases are recommended to be extracted. 1.Proximally inclined, horizontally obstructed and distally obstructed teeth are likely to lead to caries of adjacent teeth and alveolar bone resorption. 2.Recurrent acute pericoronitis needs to be extracted. 3.Obstructed teeth that may lead to jaw bone cysts and unexplained facial pain are recommended to be extracted if they are considered to be closely related to obstructed teeth. 4. Pre-pregnancy dental examination is recommended for women who are planning to get pregnant, and the obstructed teeth that are likely to cause harm during pregnancy need to be extracted prophylactically.