Whether the filled tooth can bite hard things or not needs to be determined according to the material of the filling, the degree of tooth decay, the location of the defect, and so on. 1. Dental filling materials: commonly used clinical filling materials include glass ionomer, composite resin, silver mercury, etc. Among them, glass ionomer belongs to the mixing-type materials with low hardness, so try not to use the affected tooth to chew within 24 hours after filling, and usually don’t bite hard food; composite resin and silver mercury have moderate hardness, and it is recommended that you don’t bite hard food, so as to avoid dislodging of the filling materials. 2. The degree of dental caries: dental caries can be divided into shallow caries, moderate caries, deep caries and other three degrees, including shallow caries and moderate caries, the need for filling materials less, the remaining healthy tooth tissue, so you can bite hard objects; and for deep caries, and even endodontic treatment of the teeth after endodontic inflammation, due to the degree of defects, it is generally not recommended to bite hard objects. 3. The location of the defect: the caries defect is generally located in the occlusal surface of the tooth and the incisal end and other special positions, the retention force of the filling material is not good, if you bite hard objects are prone to the phenomenon that the filling material is dislodged, therefore, it is not recommended to bite something too hard.