In vitro Bonding of Prosthodontic Adhesives to Dental Alloys

Abstract

In vitro tensile bond strengths were determined for three adhesive cements and two resin-bonded bridge cements to two alloys, each prepared by two methods: sandblasted Ni-Cr-Be alloy (I), electro-etched Ni-Cr-Be alloy (II), sandblasted Type IV gold alloy (III), and tin-plated Type IV gold alloy (IV). Storage conditions of 24 hours at 37 degrees C and 30 days at 70 degrees C were evaluated. The highest bond strengths were obtained for the electro-etched Ni-Cr-Be alloy, and all bond failures were cohesive. At both 24 hours and 30 days, the adhesive cements had the highest bond strengths to the other alloy/surface preparations (I, III, and IV). The adhesive cements usually failed cohesively under these conditions, whereas the resin-bonded bridge cements failed adhesively at the cement-alloy interface. Storage for 30 days at 70 degrees C caused average decreases of 30%, 5%, 15%, and 32% for alloy/surface preparations I to IV, respectively.

Influence of surface treatment on bond strength of resin cements to a nickel alloy

“…A mixed fracture pattern with cohesive predominance of Panavia F was obtained in this study, a constant feature in studies using this type of resin cement 22,26 .…”

Influence of alloy microstructure on the microshear bond strength of basic alloys to a resin luting cement

“…Panavia F 2.0 resin cement contains MDP monomer (10-Methacryloyloxydecyl dihydrogen phosphate), which can react chemically with the chromium oxide layer created on the cast metal surfaces (21,22) by means of covalent bonds (13). in the present study, the alloy primer was not used, in spite of being indicated by the manufacturer for application on the metal surface before cementation of the resin material.…”

Effects of Primers Containing Thiouracil and Phosphate Monomers on Bonding of Resin to Ag-Pd-Au Alloy

“…On promoting adhesive bonding as well as surface modification of substrate materials, the type of functional monomer contained in a resin cement or primer plays an influential role. Although the use of some phosphate or carboxylic monomers has been shown to improve the bond strength of resins to base metal alloys, these monomers were not as effective for noble metal alloys [6][7][8] . To bond noble metal alloys, additional surface modification treatments such as tin plating 9) , high temperature oxidation 10) , galliumtin alloy technique 11) , and silica coating 12) were devised.…”