The correct term for a full crown restoration, if the filling can normally exercise the function, there is no need to make a full crown restoration, if the filling is poor retention, resistance, or the affected teeth are susceptible to caries need to be replaced with a full crown restoration, as follows. 1. No need to make a full crown restoration: if the caries range is small, the remaining tooth tissue can provide good retention and resistance for the filling, to ensure that the filling does not fall off, not broken, and can exercise normal function, then there is no need to carry out a full crown restoration. 2. Need to change to full crown restoration: If the remaining tooth tissue can not provide sufficient retention and resistance for the filling, or the affected tooth has a high risk of caries and is prone to secondary caries, then it can be restored with a full crown restoration. There may be other reasons for changing to a full crown restoration, so it is advisable to visit a hospital and receive regular treatment.