Porcelain crown (bridge) restoration and implant restoration are both types of fixed restorations. Porcelain crowns should be installed on the restored teeth or abutment teeth (teeth on both sides of the missing position when doing porcelain bridges) to grind the teeth, generally up to about 2 mm, so that the thickness of the magnetic powder layer of the porcelain crown and the metal layer of the liner. Any grinding that does not take into account the morphology of the fabrication surface, the cohesion angle, the seating channel and the rounding of the angles of the fabrication axis is irresponsible. In general, the edge of the restoration must fit with the gingival margin to ensure that no x-disease occurs after the restoration as much as possible. Porcelain crown restoration after the bite force adjustment is also the clinician must pay attention to, also related to the success or failure of the restoration. Dental implants, is to cut in the patient’s alveolar bone to be planted on the site of the gums after the hole buried artificial implant nail (pile), and then gum suture, after 3 months or so, re-expose the artificial pile, according to the upper structure, and then consider the porcelain crown on this basis to complete the restoration. This is not a short period of time. Any method of restoration has its pros and cons of the two sides. Porcelain bridge restoration certainly needs to grind the teeth on both sides of the missing teeth, some patients seem to have “can’t give up” feelings. In the case of dental implant restorations, the possibility of the implant slipping and falling out of the implant nail after a few years cannot be ruled out due to the skewed direction of the implant nail. In case of implant failure, a fixed restoration with a porcelain bridge is often necessary.