The search for an all-purpose luting system for final cementation that fulfills the properties necessary for definitive placement of cast metal, porcelain-metal, resin, and all-ceramic fullcoverage restorations has been limited by the physical properties of the cements that have been available. Currently the clinician has many choices for cementation. Despite the challenges of the current resto...

background: heavy metals (hms) are one of the most important polluting substances emitted to the environment during cement production. tehran cement factory located in the southeastern of tehran, iran, closer to agricultural lands cultivates alfalfa, barley, and maize as feed. the objective of the study was to determine the concentration of hms in agricultural soils. methods: thirty six soil sa...

The issue of concrete modification railway sleepers remains relevant in connection with the growing demand for this product and increased requirements operational characteristics one basic materials track superstructure. problem is a partial early failure sleepers, loss load-bearing capacity periods operation (in first years or after ten years). A lot work has been done direction, most them are...

The purpose of this study was to evaluate the ability of a glass-ionomer cement-base material to prevent bacterial penetration along the dentin interface and to compare it with two conventional cement-base materials. A total of 107 Class 5 restorations was placed in Rhesus monkey teeth by means of three test materials [zinc oxide-eugenol (ZOE), copalite varnish + zinc phosphate cement base (V +...

Abstract Cemented pastefill is one of the most popular backfill types that use waste mill tailings to and stabilise mined-out voids in underground mines. Cement dosage range 3–7% added increase strength cemented serve as wall support when extracting adjacent stopes. expensive contributes significantly cost backfilling even with small dosages. Moreover, production cement energy intensive emissio...

The formal potentials of several redox couples incorporated in coatings of a perfluoropolycarboxylate on graphite electrodes were measured and compared with the formal potentials of the same couples in homogeneous solution. The differences observed agreed with those calculated from the Nernst equation with the independently measured incorporation coefficients for both halves of the redox couple...

introduction: the purpose of this in vitro study was to evaluate the sealing ability of the readymade temporary filling and hand mixed materials by assessing coronal microleakage. materials & methods: standardized access cavities were prepared in 80 intact human permanent premolar teeth. they were divided randomly into four experimental groups (n=20). the teeth were restored using one of the te...

Purpose: Scientific data on wear from toothbrushing of luting cements for fixed partial dentures (FPDs) are limited and inconsistent, therefore the study aimed: (1) to investigate the effect of marginal gap width on cement wear and (2) to compare the resistance to wear from toothbrushing of five luting materials in an in vitro model. Materials and Methods: one zinc phosphate cement (ZPC), glass...

AIM The objective of this study is to investigate the effect of different luting agents on the fracture strength of Turkom-Cera all-ceramic copings. METHODS AND MATERIALS Standardized metal dies were duplicated from a prepared maxillary first premolar tooth using non-precious metal alloy (Wiron 99). Thirty Turkom-Cera copings of 0.6 mm thickness were then fabricated. Three types of luting age...