Patient: Doctor, my 17-year-old daughter has cavities in her upper two incisors, what is the best way to treat them? Beijing Stomatological Hospital Oral Preventive Department Han Yongcheng: Tooth decay is medically called dental caries, you have to go to the hospital to check the extent of the damage, the damaged area, whether it is at the gap between the two teeth or has been damaged to the cusp. If there is no damage to the cusp, it can be filled with resin material directly. If the damage has reached the cusp, it may not be possible to fill the tooth directly, and other methods of treatment or even porcelain crowns may be required.