We investigate the role of parenthood on the outcomes of nonmarital unions for two cohorts of British women between the ages of 16 and 29. We compare the effect of conceptions leading to births and the presence and characteristics of children on the odds that a cohabitation is dissolved, or that it is converted to marriage, for women born in 1958 and 1970. A multilevel multiprocess competing ri...

Magnetic Resonance (MR) microscopy is a noninvasive tool that enables high resolution imaging of water concentration in non-magnetic materials. In this study, water migration in a dense porous material (dental cement) was monitored by 1D MR microscopy. The measured concentration profiles were later analyzed via three different migration models: an imbibition model, a diffusion model and a combi...

The use of self-adhesive resin cements is accomplished by a simple clinical step, in which the simultaneous demineralization/infiltration of the bonding substrate takes place. However, the self-adhesive resin cements have lower bond strength than conventional resin cements that rely on the application of etch-and-rinse adhesive systems. In order to increase the bond strength of the self-adhesiv...

This study evaluated the effect of primer on shear bond strength and marginal gaps of six new compomers immediately after light-activation. A resin-modified glass ionomer cement, a conventional glass-ionomer cement and a microfilled composite were used for comparison. The marginal gap widths of each of the four compomers and a microfilled composite used with the primer were significantly smalle...

1DMD, MSc, PhD, Associate professor, Iranian Center for Endodontic Research, Iran Center for Dental Research, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran 2DDS, MSD, Associate professor, Iran Center for Dental Research, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran 3DDS, Iran Center for Dental Research, Shahid Beheshti Uni...

1DDS, MSc, PhD, Graduate Student, Department of Operative Dentistry, Bauru Dental School, University of São Paulo, Brazil. 2DDS, MSc, Graduate Student, Department of Operative Dentistry, Bauru Dental School, University of São Paulo, Brazil. 3Undergraduate Student of Bauru Dental School, University of São Paulo, Brazil. 4Associate Professor of Operative Dentistry, Dean of Bauru Dental School, Un...

In order to achieve a fair description of radon transport through concrete certain information is needed on the concrete structure, porosity and permeability, on processes causing the transport of radon, on radon’s interaction with environment, factors favouring the generation of radon, etc. The concrete characteristics (that depend on its composition and especially on the W/C ratio) which infl...

Available technical methods do not permit the fabri­ cation of dental restorations outside the mouth which will not expose the cementing medium to the influence of the oral fluids. Although meticulous craftsmanship may attain very high standards of marginal adap­ tation in such restorations the solubility and disinte­ gration of cementing media is still considered suffi­ ciently important to wa...