ASSESSMENT OF TOOTH PREPARATIONS SUBMITTED TO DENTAL LABORATORIES FOR FABRICATION OF MONOLITHIC ZIRCONIA CROWNS

Purpose: The objective of this study was to assess the quality of posterior teeth prepared for monolithic zirconia crowns.Materials and Methods: A total of 392 STL-files of posterior preparations for monolithic zirconia crowns were evaluated in this study.Three-dimensional (3D) images were evaluated using a software (3D Viewer; 3Shape A/S, Copenhag

The ultrafine grained (UFGed) 1050 Al plates with a thickness of 2 mm, which were produced by the accumulative roll bonding technique after five cycles, were friction stir butt welded to 2 mm thick 6061-T6 Al alloy plates at a different revolutionary pitch that varied from 0.5 to 1.25 mm/rev.In the stir zone, the initial nano-sized lamellar structu