When it comes to orthodontic extractions, many parents and patients themselves will flag their opposition, with all sorts of seemingly proven hypotheses that extractions are bad for the body, that they can affect development, that they can damage nerves, that teeth are born that way, and that they are against science. There are all sorts of weird and wonderful theories in clinical practice, and they can be very convincing. Today, we will give a general introduction to orthodontic tooth extraction. Orthodontic tooth extraction in layman’s terms, there are roughly two reasons one for crowded teeth, the need to extract teeth to provide clearance and space for the alignment of teeth, and the second for the face is more abrupt, the need to extract more clearance for the recovery of front teeth to improve the more abrupt face. There are some other reasons that need not be mentioned here, and need to be combined with the case to make a specific choice, but the mainstream reasons are dominated by the above two factors. Orthodontic tooth extraction requires a general understanding of the human dental row, people will have two sets of teeth in their lifetime, namely, milk teeth and permanent teeth, permanent teeth have a total of 32 teeth, including the upper and lower left and right four wisdom teeth. There are four incisors, two cuspids (also known as tigers), four premolars, and four molars, two each on the left and right, in both the upper and lower dentition. The incisors are usually used to cut food, the cuspids are usually used to support the corners of the mouth, the molars are used to chew food, and the premolars are in the middle of the row of teeth, usually for transitional purposes, and their functionality can usually be replaced. Usually, depending on the situation, we will choose to remove one premolar after the cusp, one up and one down, one left and one right, that is, we usually talk about orthodontic extraction of four teeth. Sometimes there are decayed teeth in the dentition or there are some other cases, there are also different ways of extracting teeth. The orthodontic extraction usually does not cause harm to the human body, and there is no nerve damage to the human body, after all, the orthodontic treatment plan developed by professional orthodontists, extraction of teeth for patients, aesthetics, health, functional improvement is far greater than the so-called “injury”. Modern medicine has been developed for a century, there are no reports that tooth extraction will cause harm to other parts of the body, I hope that the majority of patients eliminate unnecessary fear, the correct understanding of orthodontic tooth extraction.