Table 1 Overview of shrinkage factors by model scanner, iOS, and CBCT
| Model scanner | iOS | CBCT | |
|---|---|---|---|
| System factors | |||
| Hardware factors | Camera body | Camera body | CBCT |
| Software factors | CAD software | CAD software | Processing software |
| Human factors | Dimensional changes of models | Technical errors during scanning | Measurement errors |
| Amount of shrinkage | + | ++ | +++ |