Laughing gas, also known as nitrous oxide, is a colorless, sweet-smelling gas, an oxidizing agent with the chemical formula N2O, stable at room temperature and slightly anesthetic, whose anesthetic effect was discovered in 1799 by the English chemist Humphrey Davy. The gas was early used for anesthesia in dental surgery and is now used in surgery and dentistry for its anesthetic and analgesic effects. The name “laughing gas” is due to the fact that it is euphoric and causes laughter when inhaled. Nowadays, laughing gas sedation and laughing gas anesthesia are widely used in outpatient oral surgery, especially for tooth extraction. Usually people have different degrees of nervousness and fear about dental treatment, which is professionally called “dental phobia”. As a result, people are often afraid to talk about extractions. This is because people’s memory of tooth extraction is that the patient is lying on the dental chair and the dentist is operating in the patient’s mouth with hammer, chisel and drill, which sums up in one word “pain”. On the one hand, these patients cannot cooperate well with the medical staff, and on the other hand, the best time to treat the disease is delayed. In order to completely solve the fear of such patients, the stomatology hospital of Binzhou Medical College Hospital introduced the technology of “Minimally invasive tooth extraction under laughing gas sedation”, which enables patients to complete the tooth extraction process with the cooperation of medical staff in a sober, relaxed, pain-free and comfortable state. The “Painless Minimally Invasive Tooth Extraction” painless oral treatment center was first launched in December 2009 in Southwest China, introducing new concepts from Europe and America, and trained and authorized by professional oral sedation and analgesic treatment. The so-called painlessness is derived from the inhalation of a gas called laughing gas. Unlike anesthesia, this gas is an inhaled sedative and analgesic, which can produce analgesic effect in 30 to 45 seconds, that is, it can stop pain and relax the patient, and has obvious anti-anxiety effect, and the patient is awake rather than anesthetized. Painless and minimally invasive tooth extraction technology is applied to dentistry, from filling, extraction, veneering, scaling, orthodontics, implantation and other general oral treatment to oral surgery, completely painless and enjoyable medical treatment can be realized. It is especially suitable for patients who have fear of dental treatment and fear of pain, as well as dental treatment for patients with high blood pressure and heart disease, etc. At present, painless and minimally invasive tooth extraction has been carried out in the oral and maxillofacial surgery clinic of the stomatological hospital, and pediatric dentistry has just been introduced and tried out with better results. From now on, patients can enjoy and comfortably visit and extract their teeth at Bin Medical.