The three-dimensional morphology of oral and facial tissues is obtained by obtaining an impression, followed by plaster model production via conventional methods. Considering the advancements in science and computer technology, digital scanning has been developed and applied in prosthodontics. Three-dimensional digital scanning improves patient comfort. On the other hand, digital models are easy to store, arrange, and use in remote communication. These techniques include contact mechanical scanning, laser scanning, structured light scanning, computed tomography, and so on. This review focuses on the principle, features, and application of these techniques in prosthodontics.
