A Study of Corrosion of Root Parts of Metallic Post and Core Reconstructions after their Extractions
Abstract
Introduction and objective: Cast post and cores are an important tool in the reconstruction of a dental crown. This article analyzes the state of cast metallic posts, made of alloys with high silver content, in cases where the restoration failed.
Our aim is to point out the risks associated with the use of these alloys. Results and conclusion: The analysis showed that the corrosion problems of cast post and cores relate to the inner wire component as well as cast metallic post.
In a situation when the corrosion environment penetrates to the core area, the corrosion process can lead to the formation of bulky iron corrosion products or ions of soluble silver compounds. This results in a strain, which may cause a longitudinal fracture of the tooth root and tissue pigmentation.
Since alloys with high silver content are still part of the inventory of dental laboratories and the silver-tin alloy is still offered in the dental market, we felt it necessary to highlight the risk aspects associated with manufacturing root extensions from these materials.