Removable partial dentures have been used since the 19th century, and research into new materials has made both partial and complete dentures increasingly important worldwide. Computer-aided design and computer-aided manufacturing techniques (CAD/CAM) have recently been developed for removable prosthetics dentistry. CAD/CAM technology is mainly divided into subtractive technology and additive technology. Additive manufacturing technology is defined by the Society for Testing and Materials (ASTM) as "the procedure of assembling matters to create a digital model from 3-dimensional virtual models, usually in the form of increment by increment." In contrast, "additive manufacturing technology" is defined as follows. “Conventional machining" is defined as “conventional machining" using power-driven machines such as lathes, saws, milling machines, and drills to perform various material processing processes. CAD/CAM technology uses a technology that consists of scanning, design, and milling stages. The scanning machine converts the tooth characters into a three-dimensional (3-D) map. The computer tools generate this data into a 3D map. The dentist uses computer tools to design the repair geometry. The computer tool generates the tool path the milling equipment uses to create the desired form from the restoration material.