To systematically measure and compare the stress distribution on the bone around an implant in the anterior maxilla using angled abutments by means of finite element analysis, three-dimensional finite element simplified patient-specific models and simplified models were created and analyzed. Systematically varied angled abutments were simulated, with angulation ranging from 0° to 60°. The mater...

Background and Aim: Oral bacteria can proliferate in the implant-abutment interface (IAI) and cause inflammation in the peri-implant tissues and adjacent bone. This study aimed to assess the effect of zirconia and titanium abutments on the microleakage of the IAI under oblique cyclic loading conditions. Materials and Methods: In this in-vitro study, 12 implant-abutment assemblies with zirconia...

PURPOSE The purpose of part II of this in vitro study was to compare the fracture load of two-piece zirconia custom abutments with different thicknesses and angulations. MATERIALS AND METHODS Forty zirconia custom abutments were divided into four groups as follows: group A1: 0.7 mm thickness and 0° angulations; group A2: 0.7 mm thickness and 15° angulations; group B1: 1 mm thickness and 0° an...

Fixed partial denture is one of the most popular and commonly used treatment modality for replacement of missing teeth. It often involves preparation of vital abutments to support the retainers of the fixed partial denture. Full coverage restorations or retainers; involve preparation of all the tooth surfaces of the abutments. Post-cementation hypersensitivity in vital abutments is a common com...

The concept of robust reliability is de®ned to take into account uncertainties from structural modeling in addition to the uncertain excitation that a structure will experience during its lifetime. A Bayesian probabilistic methodology for system identi®cation is integrated with probabilistic structural analysis tools for the purpose of updating the assessment of the robust reliability based on ...

Bridges are the most critical and usually vulnerable structural component of a road network exposed to various hazards. Damage due recent earthquakes worldwide highlighted substantial direct indirect financial losses related partial or total collapse bridge components pointed need for reliable assessment their seismic performance. This paper presents ‘toolkit’ developed bridge-specific fragilit...

In this research, investigation the impact of water levels, velocity on drift depth pillars bridges in Garmian region was studied. The levels and were recorded for periods, different stretches between months December 2018 March 2019. study dealt with most important postural relationships that can be used to estimate future around pillars. Description site studying within includes measurements b...

Dental implants provide a restorative tool to support crowns, bridge abutments, and removable dentures. Osseointegrated implants are titanium posts that are surgically implanted in alveolar bone. A tight immobile bond (osseointegration) forms between bone and titanium, and prosthetic and restorative fixtures are attached to the implants. Titanium implants differ from natural teeth, which may ma...

STATEMENT OF PROBLEM Information is lacking about the fatigue resistance of computer-aided design and computer-aided manufacturing (CAD-CAM) tooth-colored implant custom abutment materials. PURPOSE The purpose of this in vitro study was to investigate the reliability of different types of CAD-CAM tooth-colored implant custom abutments. MATERIAL AND METHODS Zirconia (Lava Plus), lithium disi...

PURPOSE This study evaluated the accuracies of different bite registration techniques for implant-fixed prostheses using three dimensional file analysis. MATERIALS AND METHODS Implant fixtures were placed on the mandibular right second premolar, and the first and second molar in a polyurethane model. Aluwax (A), Pattern Resin (P), and Blu-Mousse (B) were used as the bite registration material...