Abstract : Aim: The purpose of this in vitro study is to evaluate two intraoral scanning accuracy regarding to internal fit of provisional restorations. Methodology: A maxillary acrylic cast will be used with two designs. Design 1: Acrylic resin maxillary cast will be used after removal of right canine and then block their positions with wax. the abutments are maxillary central and lateral incisor and first premolar. The abutments will be prepared using the dental milling machine and then scanned by a laboratory scanner to make a virtual model, which will be used to make ten models by 3D printing. Design 2: Acrylic resin maxillary cast, the abutments are maxillary sex anterior teeth from canine to canine. The abutments will be prepared using dental milling machine and then scanned by a laboratory scanner to make a virtual model, which will be used to make ten models by 3D printing. These ten models will be used to make single crowns using Omnicam and Prime scan. After scanning the abutments, provisional single crowns will be milled using Telio CAD blocks and adapted to the corresponding dies. Internal fit will be evaluated using a measuring microscope. Results: The results revealed that there were significant results between Primescan and Omnicam for all scanned teeth. Conclusion: The provisional restorations scanned with Primescan intra-oral scanner had better internal fit than restoration scanned with Omnicam intra-oral scanner.

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