INTRODUCTION The implantological rehabilitation of the anterior sector is one of the most demanding and complex treatments due to the necessity of obtaining an optimum esthetic result. At the level of the soft tissues, it involves obtaining the complete formation of the papilla and creating a harmonic contour of the gingival margin. OBJECTIVE A bibliographical review has been carried out on t...

We have studied the velocity dispersion of guided waves in transversely isotropic formations. Theoretical velocity dispersion curves were calculated with elastic constants based on laboratory and field measurements and compared to dispersion curves for isotropic formations having the same vertical po and S-wave velocities. The symmetry axis for the transverse isotropy was parallel to the boreho...

The exchange coupling between a hard magnetic layer MnBi and soft Co-Fe has been found to significantly improve the maximum energy product. In this work, spin structure of exchange-coupled MnBi:Co-Fe bilayers is experimentally investigated by X-ray circular dichroism (XMCD) polarized neutron reflectometry (PNR). We find that out-of-plane magnetization reversal process bilayer involves formation...