While ceramic-to-metal bonding has been used in many applications, the actual chemical and physical factors leading to optimum bond strength are not well understood. In this work, several variables affecting the bonding between dental porcelain and a palladium alloy (85% Pd, 10% Cu, and 5% Ga) were investigated: 1) precoating the metal by sputtering various oxides before porcelaining; 2) peroxi...

The absence or poor chemical bonding of acrylic resin to Cobalt-Chromium metal frameworks, often introduces microleakage and bond failure at the interface. The aim of this study was to compare the shear bond strength of sandblasted cast and ingot cobaltchromium alloy to heat-cured and self-cured acrylic resins primed with four different metal primers. Fifty Co-Cr Ingot and fifty cast specimens ...

background: the aim of this study was to compare push-out bond strength of a new bioceramic endodontic sealer, endosequence bc sealer (brasseler usa, savannah, ga), used with gutta-percha in the presence or absence of phosphate-buffered saline solution (pbs) within the root canals. materials and methods: forty single-rooted human teeth were prepared and randomly divided into four groups. sample...

objectives: a reduction in bond strength of composite to bleached enamel has been reported immediately after bleaching treatment. application of some antioxidant agents may decrease the adverse effects of whitening agents on bond strength and enhance composite bond to enamel. this study aimed to assess the effect of green tea, sodium ascorbate, sage and grape seed extract on bond strength of co...

OBJECTIVES The present study evaluated the microtensile bond strength and caries formation on adhesive/dentin interfaces before and after dynamic chemical formation of secondary caries. METHODS Restorations were prepared on the dentin surface of 80 bovine incisors using four adhesive systems: two fluoride-free (Single Bond and Clearfil SE Bond) and two fluoride containing (Optibond Solo Plus ...

Atom size, not electronegativity difference, determines C−X bond strength, which weakens from X=F to I. In their Communication (DOI: 10.1002/chem.202103544), M. Bickelhaupt et al. reveal that, as the atom size increases, it is increase in steric Pauli repulsion that bond, and weakening of orbital interaction (which, fact, strengthens it!), traditionally considered model. With state-of-the-art D...

objectives: the main disadvantage of fiber posts is their low bond strength to root canal wall. the aim of the present study was to assess the effect of different root canal post space treatments on push-out bond strength of fiber posts to root dentin. materials and methods: after post space preparation in 40 endodontically treated human premolars, the teeth were randomly divided into four expe...

objectives: composite repair is a minimally invasive and conservative approach. this study aimed to evaluate the effect of an additional hydrophobic resin layer on the repair shear bond strength of a silorane-based composite repaired with silorane or methacrylate-based composite. materials and methods: sixty bar-shaped composite blocks were fabricated and stored in saline for 72 hours. the surf...