Interface corrosion in amalgam-to-amalgam and amalgam-to-nonprecious metal crown couplings.
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.
Schimelmitz
H
H
Bapna
M S
MS
Punwani
I
I
Ashrafi
S H
SH
Anderson
A W
AW
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002858:Chromium Alloys; D003300:Copper; D003343:Corrosion; D003442:Crowns; D003722:Dental Alloys; D003723:Dental Amalgam; D004577:Electron Probe Microanalysis; D008855:Microscopy, Electron, Scanning; D012965:Sodium Chloride; D013193:Stainless Steel; D013499:Surface Properties
D002858:Chromium Alloys; D003722:Dental Alloys; D013193:Stainless Steel; D012965:Sodium Chloride; D003300:Copper; D003723:Dental Amalgam