A sports mouthguard is an elastic device covering the maxillary dentition, which can cushion, absorb and disperse the impact force, effectively avoiding and reducing the occurrence of maxillofacial sports injuries. Domestic clinical research shows that the total incidence of various oromandibular sports trauma in the observation period is 6‰, while that in the control group is 24‰, and the difference between them is statistically significant. That is, the use of sports mouthguard can effectively reduce the chance of sports trauma. When the upper anterior teeth are impacted, the sports mouthguard protects the upper anterior teeth in three ways: 1) the sports mouthguard material covering the labial side of the upper anterior teeth absorbs and disperses the impact; 2) the sports mouthguard material covering the lingual side of the upper anterior teeth assists in absorbing and dispersing the impact; 3) the impact is dispersed by the support of the maxillary dentition, the mandibular dentition and the alveolar bone. The third type of conduction is achieved by the mandibular teeth biting into the mouthguard, which requires a fully balanced bite of the sports mouthguard. There are two common types of sports mouth guards on the market today: custom-made mouth guards – these are designed and made by doctors for each individual. The dentist takes an impression of your teeth and then makes a mouthguard to fit the shape of your teeth. Most people prefer custom-made mouth guards because they fit the teeth and are more comfortable. Also, because of the doctor’s extensive experience, he or she will make occlusal adjustments to the sports mouthguard to ensure a balanced bite. Nowadays, due to the advancement of technology, mouth guards are available in a variety of colors and are popular among young children. Heated, occlusal mouthguards – These mouthguards are pre-formed; the shape can be changed by heating the mouthguard in water and then occluding it in the mouth, thus making it suitable for different individuals. These mouth guards are available in many sporting goods stores, but they have a poor fit, are not as comfortable, and can easily lead to an unbalanced bite due to the lack of a doctor’s adjustment. Takeda T found in a single pendulum impact test that when the jaw was subjected to a sudden indirect impact force with an unadjusted mouthguard, the impact force was completely On the contrary, the impact force of a fully adjusted mouthguard is distributed to the upper jaw, thus reducing the severity of the impact. Simply put, it is important to choose a professional doctor to customize a professional sports mouthguard to truly protect.