Interface corrosion in amalgam-to-amalgam and amalgam-to-nonprecious metal crown couplings.

Author: Schimelmitz H, Bapna MS, Punwani I, Ashrafi SH, Anderson AW.

Source: Journal of Prosthetic Dentistry

Year: 1986

Comment:

Abstract / Excerpt:

This study examined the contact surface area in the coupling of a class II amalgam restoration with another class II amalgam restoration or with a stainless steel or nickel-chrome crown in 1% NaCl solution. The characterization of interfaces was carried out by using SEM and EDX microanalysis. The results indicate that the coupling of an amalgam-stainless steel crown and an amalgam-inconel crown in NaCl solution forms a deposit on the crown surfaces. This deposit contains all the constituents of corrodible phases of amalgam, including Zn. If amalgam restorations in adjoining teeth are contemplated, non-Zn-containing amalgam alloys of the same composition should be considered.

Citation: Schimelmitz H, Bapna MS, Punwani I, Ashrafi SH, Anderson AW. Interface corrosion in amalgam-to-amalgam and amalgam-to-nonprecious metal crown couplings. Journal of Prosthetic Dentistry. 1986;55(2):189-94.