The correct term for the lower teeth is mandibular teeth. The treatment of large gaps between mandibular teeth can be done by veneer restoration, full crown restoration and orthodontic treatment as follows. 1. Veneer restoration: It is possible to eliminate the gap between two teeth by utilizing all-ceramic or resin bonding on the surface of the teeth with less or no grinding while preserving the living pulp. 2. Full crown restoration: If the gap between the teeth is too large for veneer restoration, full crown restoration can be chosen to change the shape of the crown and eliminate the gap. 3. Orthodontic treatment: using orthodontic appliances to adjust the alignment of teeth and close the gap. The orthodontic treatments you can choose from are labial fixed aligners, lingual fixed aligners, invisible removable aligners and so on. The same disease, the patient’s condition is different, the choice of treatment is different, it is recommended to go to the hospital to receive targeted treatment.