Effect Bur Velocity on Fracture Surface, Roughness and Morphology of Zirconia Crown and Bridge by Computer Aided Design and Manufacturing (CAD/CAM)

EasyChair Preprint 3564

Abstract

The Y-TZP has been used in dentistry such as crowns, fixed partial dentures, implants, abutments, and brackets. This paper studied effect cutting speed of bur on fracture surface, roughness and morphology of crowns made of different brands of ’yttria stabilized tetragonal zirconia polycrystals (3- 5 mol % Y) "by "computer aided design and manufacturing techniques. The results SEM of the surface morphology for each brands reveals milling traces and scratching induced by the milling tool also crack and microchips and pores appeared on the surface machining due to densification process. The SEM of the fracture surface morphology revealed the presence plastic deformation ,microchip,twist hackle and  defects refers to the direction of crack propagation. The results of fracture resistance for crown shows the fracture force at high cutting speed  cutting speed was lower than from low cutting speed Finally, the tool life was found increase with increasing cutting speed.

Keyphrases: Bridge, CAD/CAM, crown, fracture surface, morphology, roughness

@booklet{EasyChair:3564,
  author    = {Iman Abed and Duha Bassim},
  title     = {Effect Bur Velocity on Fracture Surface, Roughness and Morphology of Zirconia Crown and Bridge by Computer Aided Design and Manufacturing (CAD/CAM)},
  howpublished = {EasyChair Preprint 3564},
  year      = {EasyChair, 2020}}