A missing tooth may affect the occlusion, and also prone to caries of other teeth. 1. Influence occlusion: after missing a tooth, due to the loss of occlusal contact with the opposite jaw teeth, it can lead to the elongation of the opposite jaw teeth over time, and at the same time, the two sides of the teeth have lost the normal connection, and will be tilted to the side of the gap, so that the occlusal relationship of the misalignment affects the cleaning of the food. 2. Causing other teeth caries: the elongation of the opposite jaw teeth and the tilt of the teeth on both sides, but also lead to other teeth neighboring relationship suffered damage, the appearance of interstices, resulting in food undercrowding, resulting in a decline in the self-cleaning function of the teeth, the appearance of too much plaque, thereby increasing the chance of caries. One less tooth will affect the oral health, it is recommended to consult the doctor in time, under the guidance of the doctor for denture restoration.