The price of tooth decay filling is mainly based on the degree of tooth decay, the consumption used in the filling process and the filling material chosen by the patient. At present, the three most widely used filling materials in the market are glass ionomer, which costs about$200 a piece. There is also a resin type material, which costs about$300-400 a piece. There are also porcelain inlays, which cost more than$1,000. In addition, the price varies with different brands. Tooth decay is generally divided into three types: shallow caries, medium caries and deep caries, shallow caries and medium caries can be filled directly with filling materials, the cost is about 200-400 yuan. As for deep caries, because it is very close to the nerve, the filling material will stimulate the nerve to a certain extent, so pulp treatment is needed, and generally the pulp treatment may charge extra, generally around 300-500 yuan a piece. It is suggested that once patients find black spots on teeth or holes on top of teeth, they should go to hospital for filling treatment in time to avoid deeper and deeper decay and injury to dental nerve.