A computational analysis has been performed in this study to solve three-dimensional thermo-solutal natural convection a differentially heated cubical enclosure filled with micropolar CNT/water nanofluid stabilized by two types of surfactants lignin and sodium polycarboxylate. The work is carried out for different pertinent parameters as Rayleigh number (104 $$\le$$ Ra 106), parameter (0 K 10),...

Adhesive bond strengths of glass ionomer and polycarboxylate cements to human enamel and dentine were measured in vitro on untreated surfaces and on surfaces treated with cement liquid or polyacrylic acid, ferric oxalate, and ferric chloride. The bond strengths of two cements to enamel and dentine were increased by as much as 183 per cent by the use of surface treatments of polyacrylic acid and...

PURPOSE Provisional cements are commonly used to facilitate retrievability of cement-retained fixed implant restorations. While the functional life spans of these cements are unpredictable, the relative retentiveness of various permanent and provisional cements between dental alloys and titanium abutments is not well documented. The aim of this study was to compare the uniaxial resistance force...

The mechanical properties of polycarboxylate cements containing 20 massO/o of fbur kinds of aluminoborate whiskers with ditTercnt fiber lengths and diameters were eva]uated. Bending strength of the cements inereased with increase in fiber length, whereby the strength ol' the cement with the longest fiber was about two times greater than that ef whisker-free cement, The diametral tensile strengt...

background and aims. this in vitro study was designed to compare enamel demineralization depths adjacent to bands cemented with zinc polycarboxylate, glass ionomer (gi) and resin-modified glass ionomer (rmgi), in order to achieve minimal enamel demineralization during orthodontic treatment. materials and methods. sixty fully developed extracted third molars were randomly divided into three test...

The in vivo disintegration of luting cements was determined at 6- and 12-month intervals in two test series of 20 participants each. Four cements were inserted in the wells located in the mesial and distal surfaces of cast crowns. Glass ionomer, silicophosphate, polycarboxylate, and zinc phosphate cements prepared with recommended powder/liquid ratios are discussed, and are ranked with respect ...

Proposed special requirements exist for the rheological properties and time varying characteristics of 3D printing cementitious materials (3DPC). In this study, high dispersion polycarboxylate superplasticizer (HD PC) fluidity retaining (FR were used to control behaviors 3DPC. The correlation interval, interlayer bonding strength investigated. results indicated that FR PC improved retention abi...