Yesterday, I happened to meet a couple of friends of mine whom I had not seen for many years at the hospital, and their son was still sobbing and tearing up, which was heartbreaking to see. When the couple was anxious and worried, I learned that their child had suffered a traumatic injury during a school activity, knocking his front teeth, and had just had a periodontal splint fixed in our maxillofacial surgery department, and they said that their child had been naughty and mischievous since childhood, and was only in the third grade, and had already gotten into a lot of trouble. Then I would like to address this issue and talk about dental trauma. The incisors are the most exposed and prominent teeth in the oral cavity area. When people fall, they generally fall forward and land on their mouths and faces first, so incisors can easily be injured, loosened, broken, or even dropped. The incisors that are bruised should first be examined in the hospital to see if there are any other parts of the fall. For example, in addition to the incisor fall, there are no fractures at the roots of the teeth, and the roots of the teeth are not broken. If necessary, the doctor will give you special tests and take x-rays to clarify the diagnosis for treatment. Generally speaking, the treatment varies depending on the degree of the incisor fall. If the bruised incisor is only slightly loose and there is no other feeling, you can not do any treatment, as long as you do not chew with the incisor, so that the upper and lower incisors do not touch. If the loosening is obvious, the doctor can simply fix it. If the incisor is knocked off a small corner, the pulp is not damaged, and the root is not loose, after the doctor’s treatment, a retaining nail is made in the defective part, and the composite resin material with the same color as the tooth is restored, so that the shape and color of the restored tooth are in harmony with the neighboring teeth. If a small part of the tooth is broken and involves the pulp, the pulp is exposed, sensitive to hot and cold, and even painful. In this case, pulp treatment should be performed first. The remaining crown is then prepared and a plastic crown or porcelain crown is made on top of it. They look and color like your own real teeth, and they are comfortable in your mouth without foreign body sensation. However, they should not be used to gnaw on hard foods, as they may chip. If the crown is largely fractured and the pulp is exposed, a perfect root canal treatment should be performed, i.e., the pulp and nerve should be taken out, the root canal should be filled, a pile should be made using the root, and another tooth should be set on this pile. If an incisor is knocked out, don’t be nervous. First, rinse the lost tooth with water, but do not rub it with anything. Then soak it in milk or hold it in your mouth. Get to the hospital as soon as possible (preferably within thirty minutes). Depending on the situation, the doctor will reinsert the tooth into the original socket and then fix the tooth to the next tooth for one or two months. This method is called “tooth reimplantation”. In conclusion, it is important to go to the hospital as soon as possible after the incisors are hit, otherwise, it will be a lifelong regret if you miss the treatment. Here I would like to introduce to my friends the sports mouthguard: American children are good at sports. Especially some sports that require mutual physical contact such as ball games. At this time, they are required to wear dental protectors to avoid injuries to their teeth from accidental impacts. According to the American Dental Association, wearing a dental guard has prevented more than 200,000 cases of sports-related mouth injuries in the United States each year. According to figures released by the American Youth Sports Association, 5 million teeth are still damaged to varying degrees in sports each year in the United States. According to the statistics of 1 million cases of trauma by “1990 Australian Youth Sports”, the trauma rate without a sports mouthguard is 30%, while the trauma rate with a mouthguard can be reduced to 0; wearing a mouthguard can reduce the trauma of lip from 55% to 24%, and the trauma rate of tongue from 21% to 8%. The rate of mandibular trauma was reduced from 10% to 2%; wearing a mouthguard also effectively prevented concussions, while the rate of concussions without a mouthguard was 16%. According to Dr. Ray Padilla, the cost of damaging a tooth is more than 20 times the cost of making and wearing a mouthguard. It is clear that the risk of dental and mouth injuries during sports can be effectively reduced in both youth and adults by wearing a personalized mouthguard.