Generally speaking, the process of full crown restoration of a tooth consists of pre-prosthetic preparation. If the affected tooth has developed decay, pulp inflammation, or apical inflammation, the tooth must be prepared for crown restoration in the hospital approximately 1-2 weeks after root canal treatment. The surgeon first evaluates whether the dentin or enamel of the remaining tooth tissue can serve as a base to hold the tooth structure in place. If the underlying dentin is not sufficient to create the required retention for the crown, a pile core pre-repair will be placed on top of the original root of the root canal treated tooth before the upper portion of the tooth is prepared. After the pile crown is cemented, the affected tooth is prepared. The preparation takes about 30 minutes, followed by an intraoral hard mold, which takes about 5 minutes, after which the intraoral occlusal relationship is made. After all hard molds and oral occlusal relationships are made, the restoration is sent to the fabricator, who makes the crown restoration, which takes about 1-2 weeks. Currently, computer-aided intraoral scans are available for intraoral restorations. After the scans are completed, the design is designed by the designer and then cut by the machine, allowing for the clinical process of preparing the restoration and bringing it in on the same day.