The treatment time of simple filling is about 20-30 minutes, and the specific time will be different according to the patient’s specific disease. The filling treatment can be divided into the following three cases according to the patient’s condition. 1.Simple shallow and moderate caries, such patients can generally remove the caries part of the tooth completely, and then use the filling material to pad, fill and shape the defective tissue of the tooth, the whole treatment time is about 20-30 minutes. 2.For the tooth caries degree has initially injured the pulp tissue, but the pulp is still 3.If inflammatory lesion occurs in the decayed tooth and causes serious damage to the root tissue such as the apical part of the tooth, it is necessary to consider root canal treatment and then carry out the overall dental restoration treatment by porcelain or dental implant, and the process takes about 1 month. This process takes about 1 month. After filling treatment, patients should pay attention to daily oral hygiene care during their daily diet and avoid eating foods with hard texture to avoid damage to the restorative dentition.