objectives: micromechanical retention of resin cements to alloys is an important factor affecting the longevity of metal base restorations. this study aimed to compare the bond strength and etching pattern of a newly introduced experimental etchant gel namely nano met etch with those of conventional surface treatment techniques for nickel-chrome (ni-cr) and high noble alloys.  materials and met...

Background: The effect of in vivo implantation on breast implants is important to both physicians and patients, but little information about the in vivo aging process of silicone gel-filled breast implants has appeared in the literature. The effects of the in vivo aging process could affect the durability of breast implants. Objective: The purpose of this study was to investigate changes in the...

It has become a research hotspot to explore raw material substitutes of concrete. is important the mechanical properties self-compacting concrete (SCC) with slag powder (SP) and rubber particle (RP) replacing cement coarse aggregate, respectively. 12 kinds composite modified (CMSCC) specimens were prepared by using 10%, 20% 30% SP 30%, 40%, 50% 60% RP. The rheological properties, microstructure...

This paper reports the dispersion of nanoclay in vinylester using co-rotating twin screw extrusion and ultrasonication for preparing nanoclay/vinylester gel coat. Two sets MMT/vinylester specimens, namely Type 1 2 were prepared comparative studies. While specimens only, both twin-screw extrusion. showed lower levels intercalation higher exfoliation. By coat so by two different routes, MMT/vinyl...