Typically, patients should remain fasted for 2-3 hours after receiving a dental filling. The specific interval length has a certain relationship with the material used by the patient to fill the tooth. Because patients receive dental filling treatment, the filling material needs to wait for 2-3 hours to reach the ideal degree of curing, and resume normal eating function. Currently in the clinic, the commonly used filling materials can be divided into optical curing and chemical curing two types. Chemically cured fillings mainly use polymerized materials and have a chemical reaction with oxygen to achieve the curing effect. The initial curing time is 3-5 minutes, and the complete curing time takes about 2-3 hours. Optical curing material is mainly through the way of light, prompting the material polymerization reaction, so as to achieve the effect of curing hard. Compared to the former, the time for resuming eating can be shortened accordingly for those who choose this type of filling material. It is recommended to choose softer food for the first 12 hours after receiving the filling treatment to avoid excessive chewing pressure, which may cause the filling material to fall off or damage the phenomenon.