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Description of the studying groups
| Impression technique | thickness of flexible polyurethane layer | Groups | Number of samples |
|---|---|---|---|
| Conventional Impression | 2 mm | Group I (C2mm) | 15 |
| Conventional Impression | 4 mm | Group II (C4mm) | 15 |
|
Digital Impression |
2 mm | Group III (D2mm) | 15 |
|
Digital Impression |
4 mm | Group IV (D4mm) | 15 |
