Accuracy Analysis of Extraoral 3D Scanning in the Development of Dental Prosthetic.

Objective: The study has evaluated the accuracy (trueness and precision) of seven extraoral scanners when scanning two different types of jaws: simplified jaw with sharp edges and abutments and realistic jaw with natural teeth. The accuracies of extraoral scanners were compared, and their compliance with the required clinical accuracy levels was discussed.

Material And Methods: Ten scans were made with each scanner for both models.

Differences in engineers' brain activity when CAD modelling from isometric and orthographic projections.

A way of presenting information in visual representations of technical systems influences the progress and the outcome of the engineering design process. Consequently, improving the means by and through which information is utilised during the process is one suggested approach to advancing engineering design. Engineers' interaction with visual representations of technical systems is mainly visual and virtual.