Poor dental quality clinically refers mostly to poor mineralization of enamel and dentin, which are easily worn out. Generally, the main thing is to reduce biting hard objects, avoid contact with too cold and too hot stimuli, and less contact with acid-producing foods. 1. The outermost layer of the tooth surface is wrapped in a hard layer of enamel, and then inside is dentin. Poor dentin clinically may be the result of congenital underdevelopment of tooth structure, leading to poor mineralization of the teeth, easy to wear and tear, etc. It may also be the result of excessive intake of fluoride, leading to dental fluorosis, etc. 2. If the teeth have passed the age of development, it is generally impossible to restore, can only reduce the bite of hard objects, avoid contact with too cold and too hot stimuli, less contact with acid-producing foods, such as cola, etc., resulting in substantial defects need to be repaired in a timely manner. Poor dental quality is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.