Beginning of the twentieth century, population growth, urbanization and industrialization has led to depletion of rapidly building areas. Accordingly, each passing day, the opening of the new construction sites has become mandatory. Among these newly opened areas, geotechnical aspects of construction from time to time in areas not suitable for construction and deployment was seen to improve the...

The Upper Triassic Chang-7 Member of the Ordos Basin contains typical tight sandstone reservoirs. Reservoir quality is affected by diagenesis, which a critical factor in oil exploration. In this study, sandstones were studied variety experimental methods, including thin sections, scanning electron microscopy (SEM), and X-ray diffraction (XRD), to determine reservoir characteristics diagenesis d...

Abstract Cementation exponent or factor is one of most crucial factors in the Archie’s equations that should be estimated precisely order to accurately determine relevant petrophysical characteristics reservoir. Inaccurate estimation this leads incorrect analysis and inaccurate determination water saturation which highly important for economic forecasting hydrocarbon reservoirs. An alternative ...

OBJECTIVE To evaluate the marginal gap (MG) and absolute marginal discrepancy (MD) of full ceramic crowns with two finish line designs, shoulder and chamfer, using microcomputed tomography (micro-CT) before and after cementation. MATERIALS AND METHODS Sixty extracted human maxillary premolar teeth were divided into two groups based on the finish line design: Group I: 90° shoulder and Group II...

Zinc filter cakes (ZFCs) have economic values as secondary sources, but also are classified hazardous waste and negative effects on human health the environment because they contain several heavy metals. Especially extraction recovery of lead zinc metals from ZFCs will provide environmental benefits. Therefore, in this study, with a weak acid (ammonium acetate, AmAc) leaching was investigated, ...

OBJECTIVES Several adhesive systems are available for cementation of fibre posts into the root canal. The aim of the present study was to investigate the push-out bond strengths of quartz fibre posts to root dentin with the use of different total-etch and self-adhesive resin cements. STUDY DESIGN Ninety single-rooted human premolars were endodontically treated and standardized post-spaces wer...

cementation of alloy-based restorations with traditional cements (e.g., glass-ionomer, resin-modified glass-ionomer, zinc phosphate, zinc polycarboxylate) to bonding of all ceramic restorations with resin based cements. With the increasing demand for high-end esthetic treatments for anterior teeth restorations, the need for a good esthetic cementation system comes into play in modern day dentis...

Background and Aim: Dislodgment of prosthetic crowns is a common occurrence. In such cases, recementation is a suitable treatment option. The aim of this study was to compare the retention in cementation and recementation using different resin ce-ments. Materials and Methods: In this in vitro, experimental study, 40 premolars were se-lected (n=10). They were standardized relative to some prope...