purpose: the aim of this study was to evaluate the effect of two gingival finishing lines (90° shoulder and deep chamfer) on the marginal fitness of two types of full anatomic all-ceramic crowns; zirconia crowns (zikonzhan) and glass ceramic crowns (ips e-max cad) milled with cad/cam system. materials and methods: two dentoform teeth of left maxillary first molar were prepared with chamfer fini...

Purpose: The aim of this study was to evaluate the effect of two gingival finishing lines (90° shoulder and deep chamfer) on the marginal fitness of two types of full anatomic all-ceramic crowns; zirconia crowns (Zikonzhan) and glass ceramic crowns (IPS e-max CAD) milled with CAD/CAM system. Materials and Methods: Two dentoform teeth of left maxillary first molar were prepared with chamfer fini...

The use of hierarchical Chamfer Matching (CM) to match die patterns on VLSI wafers for the alignment of semiconductor chips is presented. This method can extract images with non-umform lighting (without loss) for matching, and somehow it is invariant to some environment changes. Here, it is applied to align IC patterns under non-uniform lighting while the normalized correlation method fails. Ex...

The first solution for addressing this new wire bonding challenge was the matte finish. Along with some geometrical capillary tip modifications, such as the double internal chamfer (IC), these changes proved Cu wire to be a reliable substitute to gold (Au). However, while the welding requirements were achieved, the tool’s resistance to wear deteriorated. This was expected as the hardness of Cu ...

The intramedullary alignment guides used in total knee replacement disrupt the intramedullary vessels, resulting in greater postoperative blood loss. The use of an autologous bone plug to seal the intramedullary femoral canal has been shown to be effective in reducing postoperative bleeding. The authors present a simple technique to create a bone plug from the anterior chamfer femoral cut to pe...