The caries can be divided into superficial caries, medium caries and deep caries according to the depth, when the deep caries occurs, the decayed tissue has reached the deep layer of dentin. When the filling is carried out, the second bedding is needed at the bottom of the cavity, and the price of deep caries filling varies according to the bedding material and the blocking material above. If the ordinary calcium hydroxide or zinc polycarboxylate cement is used for bedding, and the glass ion formed by the mixing of water and powder is used for filling above, the price of a deep cavity filling is usually about 200 RMB. If you choose to apply the light-curing calcium hydroxide for the base and the photosensitive resin above for the filling, the price of a deep cavity filling is about 500 RMB.