Abstract The molecular weight of the macromonomer has a great influence on performance Polycarboxylate Superplasticizer (PCE). PCE with different structures was prepared by using methylallyl polyoxyethylene ether (HPEG) weights 2400, 3000, 4000, and 5000. effects emptying time rheological properties cement paste concrete were investigated. test results show that paste, plastic viscosity ratio i...

The growing demand for high strength concrete [HSC] in the construction industry increases usage of cement, resulting environmental issues. Recent studies are showing that utilization cementitious materials can effectively reduce volume cement. In present study, ternary blended combinations were prepared using silica fume, and fly ash to attain HSC. Here, cement was partially replaced by fume [...

This paper proposes a method for the determination of optimum surfactant amount to achieve highest strength carbon nanotubes (CNT) cementitious composites. The is based on combining results chemical and mechanical test. test was used determine remaining after sonication by analyzing solutions containing CNTs, polycarboxylate surfactant, water. On other hand, that achieved composite’s conducting...

The relationship between metallic cast crowns and tensile strength according to cement types submitted to thermocycling was studied. Seventy-two metallic crowns were cast with Verabond II Ni-Cr alloy and cemented in standardized preparations with 10 masculine tapering. Three types of finishing line (45-degree chamfered, 20-degree bevel shoulder and right shoulder) were made with diamond burs on...

OBJECTIVE The aim of the present clinical longitudinal study was to observe, over 10 years, the prognosis of abutment teeth restored with fixed prostheses retained by glass ionomer luting cements and one conventional zinc phosphate cement. METHODS Three dentists prepared 135 abutment teeth in 61 patients to retain 81 fixed prostheses. The prostheses were retained by two glass ionomer luting c...

An important requirement for dental materials placed in direct contact with living tissues is biocompatibility. The purpose of this study was to evaluate the antiproliferative activity of three dental materials (mineral trioxide aggregate, zinc oxide-eugenol cement, and glass-ionomer cement) against a panel of established fibroblastic cell lines (L929, BHK21/C13, and RPC-C2A). The materials wer...

BACKGROUND The purpose of this study was to compare the effects of selected cements, or their combination with titanium, on the growth of two periodontopathic bacteria: Prevotella intermedia (Pi) and Fusobacterium nucleatum (Fn). MATERIAL AND METHODS This study was comprised of several experimental groups: 1) Dental luting cements (glass ionomer cement, methacrylate-based resin cement, zinc-oxi...

AIM Remnants of provisional cement on the internal surface of cast restorations can have an adverse effect on the performance of the definitive luting agent. The purpose of this study was to evaluate the effect of eugenol-containing temporary cement removal by an ultrasonic or an organic solvent on the retentive strength of metallic rings cemented to amalgam cores using zinc phosphate cement. ...