Abstract: Objective To analyze the clinical effect of nitrous oxide inhalation on extraction of embedded supernumerary teeth, and to provide reference for the subsequent clinical research. Methods a total of 114 children who were admitted to our hospital from January 2016 to February 2018 were selected for extraction of embedded supernumerary teeth. They were randomly divided into two groups: tooth extraction assisted by nitrous oxide inhalation and tooth extraction routine. Then the condition of the children and curative effects were observed. Results Most of the children were able to complete tooth extraction without any anesthesia accident. Nitrous oxide inhalation group could respond correctly according to the instruction and keep respiratory tract unobstructed, shorten the operation time (P < 0.05), and lower Frankle score (P<0.05). Among them, 98.25% children could complete treatment, and have no nausea or vomiting, have clear consciousness after tooth extraction, normal activity unaffected, no excessive sedation or postoperative hospital phenomenon. Conclusion Nitrous oxide inhalation assisted extraction of embedded supernumerary teeth in children is effective, and can significantly reduce clinical anxiety, shorten treatment time, reduce the probability of general anesthesia treatment and improve treatment completion rate and patient satisfaction, which is worthy of clinical application.

Key words: nitrous oxide inhalation, the child embedded supernumerary teeth, anxiety, clinical curative effect