background and aims. this in vitro study evaluated the effect of delaying composite resin restorative procedures bonded with total-etch and self-etch adhesive systems on microleakage following root canal irrigation with sodium hypochlorite (naocl) solution. materials and methods. the roofs of pulp chambers and roots (1–2 mm below furcation) of 40 human first molar teeth were cut and pulp tissue...

background: sulphites are widely used as a preservative and antioxidant additives in the food and pharmaceutical industries. many types of biological and toxicological effects of sulphites in multiple organs of mammals have been shown in previous studies. objective: the aim of this study was to investigate the effects of sodium metabisulfite (smb) on testicular function and morphometric values ...

to assess the effects of different final irrigants on the bond strength of bonded root filling materials, epiphany/resilon and epiphany self-etch (se)/resilon.the root canals of eighty single-rooted extracted human teeth were prepared. after the smear layer was removed using 17% edta, the samples were randomly divided into eight groups. in groups 1 and 2, no additional irrigant was used after e...

background:   objective: the aim of this study was to investigate the harmful effects of sodium arsenite on sperm parameters and the antioxidant effects of vit.e on sperm anomalies in sodium arsenite treated rats.   materials and methods: adult male rats were divided into 4 groups: control, sodium arsenite (8 mg/kg/day), vit.e (100 mg/kg/day) and sodium arsenite+vit.e. oral treatments were perf...

In vitro methods have environmental advantages of preparing bio additives as harmful chemicals such fertilizers, herbicides, pesticides are used. addition, obtaining biomass does not depend on seasonality and a long growing season. this series experiments, an accelerated method for sterile alfalfa culture was developed by adding 1% potassium humate to the explant culture. From 4 varieties alfal...