Then CAD/CAM all ceramic crowns constructed for each tooth sample. The specimens divided in to two groups according to the type of digital impression technique: Group A, eight prepared teeth scanned directly by Bluecam camera Group B, eight prepared teeth scanned directly by Omnicam camera. Standardized preparation of all teeth samples were carried out to receive all ceramic crown restoration with deep chamfer finishing line (1mm), axial length (4mm) and convergence angle (6 Materials and Methods: Sixteen sound upper first premolar teeth of comparable size were collected. The objective of this present in vitro study was to evaluate the marginal fitness of all ceramic crowns fabricated by direct digital scanning of the prepared tooth using two types of intra-oral cameras (Bluecam camera with strip light projection technique and Omnicam camera with video sampling technique). The introduction of scanning system presents a paradigm shift in the way of the dental impression procedure and encourages the accuracy of obtained restoration especially in the marginal area as a result of producing accurate final impression The digital system offers many advantages over the Conventional method. ![]() Background: In capturing a negative image, the digital impression secures a digital record for the purposeof designing and creating restorations.
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