Fixed prostheses are cemented to the abutment teeth by means of full crowns, pile crowns, partial crowns, etc., with full crowns being the most commonly used. If the missing tooth is restored by a full or porcelain bridge, the abutment teeth at both ends of the missing tooth are ground down and the bridge is attached to the abutment teeth through the retainer and the occlusal force is transmitted to the abutment teeth through the retainer. Fixed prostheses are commonly used in clinical practice to restore single or multiple missing teeth, usually by bonding the restored bridge to the natural teeth using an adhesive or retention device to restore the anatomical form and physiological function of the missing tooth. After the fixed denture restoration, it is necessary to pay attention to good oral hygiene, usually pay attention to brushing, and avoid chewing too hard food, so as not to form a large force on the fixed teeth, resulting in tooth disintegration or fracture and regular oral examination to protect the remaining teeth and fixed denture.