Evaluation of the Accuracy of Six Intraoral Scanning Devices: An in-vitro Investigation.

The making of conventional dental impressions of tooth preparations using elastomeric materials is a task encountered routinely in today’s practice of dentistry. However, studies have evidenced that many of these conventional dental impressions that are sent to dental laboratories are unsatisfactory due to flaws such as voids and bubbles at critical regions of the impression.1,2 Moreover, distortion and expansion of gypsum, used in the making of stone dental casts, can further reduce the accuracy of this conventional dental restoration fabrication process.3 Because computer-aided design/computer-aided manufacturing (CAD/CAM) requires digital models, the interest in intraoral digital impression making has increased to circumvent the conventional production of stone casts using conventional impression materials.

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