Bond Strengths of Two Dental Bonding Systems

Abstract

A new bonding system named Kevloc has been introduced. It is based on acrylization of the metal surface with the goal of preventing the occurrence of a marginal gap between the metal and the resin. The purpose of this investigation was to determine the values of the shear bond strength achieved using the Kevloc technique on Ag-Pd (Auropal SE) and Co-Cr (Basil S) alloys and to compare them with those obtained with the OVS technique. The shear bond strengths were measured with the Smitz-Schulmayer shear test in a universal testing machine for polymer materials. A microscope image analyzer was used to measure the thickness of bonding layers and to reveal the possible occurrence of the marginal gap with both techniques. No marginal gap was detected with either technique. Kevloc provided better results than OVS only in a group of specimens tested after polymerization. Immersion in water and thermocycling reduced the initially high bond strength values of Kevloc specimens, whereas the bond strength values of OVS specimens remained unchanged regardless of which aging treatment was used. Microscopic examination did not reveal the existence of the marginal gap for either bonding system. According to the results obtained, it can be concluded that the Kevloc bonding system does not provide better shearing bond strength than the OVS bonding system.

Vergleichende Untersuchungen zur Eignung eines neuen Oberflächenkonditionierungsverfahrens (Airsonic Mini Sandblaster®) in der Klebebrückentechnik / Comparative Studies on the Applicability of a New Surface Conditioning System (Airsonic Mini Sandblaster®) in Adhesive Bridging Technic

“…In this way, a reduction in treatment time and costs is achieved, and the reliable handling of the coating system is also improved. [6][7][8][9]. Die Untersuchung der Verbundfestigkeit von dentalen Metall-Kunststoff-Klebungen auf Basis der genannten Verfahren ergibt für die Verfahren in vitro eine gute Hydrolysestabilität des Verbundes zu Befestigungskompositen [10], Verblendkunststoffen [11], Silikonen [12] oder faserverstärkten Compositen [13].…”