Filling is the primary method for treatment of decayed tooth. Remove completely the carious organizations, and make it hole-shaped,and then fill it by material after cleansing and disinfection and restore defective shape of teeth. Teeth will not be damaged again. Filling will have a good effect on superficial caries. During the treatment of middle caries and deep caries, sometimes after removing the carious organization, dental pulp is nearly exposed, so a film of pulpal protection should be filled at the bottom inside carious tooth and then fills with filling material. Sometimes after removing the carious organization, dental pulp is nearly exposed, so should treat the dental pulp first and then fill with filling material. Filling material mainly is amalgam or composite resin. Primary teeth will be replaced by a new one, so it can be filled by glass ionomer cement (a temporary filling material).
The cavity without caries cave can be treated by drug and achieves a certain effect. Constant cavity always uses sodium fluoride paste to spread on the cavity; silver diamine fluoride can be spreaded on primary teeth (After spreading, the color will be changed, so it is not applied for permanent teeth). After treatment by drug, it will repeat, so it is still necessary to review once every six months. Therefore, for the treatment of decayed tooth, the sooner the better.
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