Evaluation of single liquid primers with organic sulfur compound for bonding between indirect composite material and silver-palladium-copper-gold alloy.
The purpose of this study was to evaluate the effect of primers on bonding between a silver-palladium-copper-gold alloy and an indirect composite material. Cast disks were air-abraded with alumina, conditioned with one of five primers (Alloy Primer, Luna-Wing Primer, Metal Primer II, Metaltite, M.L. Primer), and bonded with a light-activated indirect composite. Shear bond strengths were determined after 20,000 times of thermocycling. The results showed that four of the primers, except the Luna-Wing Primer, were effective in enhancing the bond strength as compared with the unprimed control group. Of these four primers, Alloy Primer, Metal Primer II, and M.L. Primer exhibited significantly greater bond strengths. It can be concluded that the effectiveness of primers varies considerably according to the organic sulfur compounds added to the solvent, and that care must be taken in selecting priming agents for bonding the composite material and the silver-palladium-copper-gold alloy.
Bonding and wear characteristics of a tri-n-butylborane initiated adhesive resin filled with pre-polymerized composite particles.
This study evaluated the wear characteristics and bonding to silver-palladium-copper-gold (Ag-Pd-Cu-Au) alloy of an acrylic resin that was filled with pre-polymerized composite particles and initiated with tri-n-butylborane (TBB) derivative (Bondfill). Three methyl methacrylate (MMA)-based resins (Bondfill, Super-Bond, and Multi-Bond II) and a microfilled composite restorative material (Metafil C) were assessed. Disk specimens were cast from the alloy and were air-abraded with alumina. The disks were bonded with nine bonding systems selected from two priming and three luting agents. Shear bond strengths were measured before and after thermocycling. Bond strength varied from 2.2 MPa to 28.2 MPa. Three systems based on thione primers (Metaltite and V-Primer) and TBB-initiated resins (Bondfill and Super-Bond) had the highest bond strength after thermocycling (15.9-20.4 MPa). The toothbrush-dentifrice abrasion test showed that the Metafil C material was the most wear-resistant, followed by Bondfill and Super-Bond. In conclusion, Bondfill resin is an alternative to Super-Bond resin for luting metallic restorations and for restoring tooth defects. However, care is required in selecting appropriate clinical cases.
Ethics and the professions.
We may not be able to make you love reading, but ethics and the professions will lead you to love reading starting from now. Book is the window to open the new world. The world that you want is in the better stage and level. World will always guide you to even the prestige stage of the life. You know, this is some of how reading will give you the kindness. In this case, more books you read more knowledge you know, but it can mean also the bore is full.