Dentists often place post and core buildups on endodontically treated abutments for crown and bridge restorations. This article analyzes the bio-mechanical purposes, advantages and disadvantages of placing a core or a post and core in an endodontically treated tooth and reviews literature on post and core biomechanics. The author assesses the scientific rationale of the claim that the main purp...

This study aims to analyze the longitudinal seismic performance of a typical multi-span continuous girder bridge with seat-type abutments under earthquake excitation, especially accounting for different abutment behaviors. Three-dimensional finite element models bridges are built considering nonlinearity columns, bearings, abutment-backfill interactions, pile-soil and pounding at expansion join...

This paper presents two-dimensional (2D) and three-dimensional (3D) numerical simulations of a half-scale geosynthetic reinforced soil (GRS) bridge abutment during construction load application. The backfill was characterized using nonlinear elastoplastic model that incorporates hyperbolic stress–strain relationship the Mohr–Coulomb failure criterion. Geogrid reinforcements were linearly elasti...

Fixed dental prosthesis success requires appropriate impression taking of the prepared finish line. This is critical in either tooth supported fixed prosthesis (crown and bridge) or implant supported fixed prosthesis (solid abutment). If the prepared finish line is adjacent to the gingival sulcus, gingival retraction techniques should be used to decrease the marginal discrepancy among the resto...

Abstract The Palu Earthquake on September 28th, 2018, which was followed by a tsunami and liquefaction, caused massive damage to infrastructure in City its surroundings, include III Bridge as an Australian steel truss structure with span of 2 x 60 m. need for evaluation the post-earthquake bridge can be done Rapid Visual Screening (RVS) method detect transverse longitudinal direction bridge, cr...

It is reported that the inclined pile could be either beneficial or detrimental for abutment they support in condition of liquefaction—induced lateral displacement. To clarify effect on seismic response bridge abutments undergoing displacement, numerical analyses were carried out damaged was supported by piles and displaced riverwards 100 mm–150 mm due to soil liquefaction during 2011 Great Eas...