Elastomeric Impression Materials and Cleaning Systems for Residue Removal

摘要

A materials evaluation program was conducted to characterize castable resin compounds as suitable dimensional inspection aids. A fast curing dimethylsilicone based compound was selected as the best performer of the eleven compounds tested. Evaluation of physical properties revealed an inherent problem of particle adherence of these compounds to the metal surfaces tested. A cleaning study was conducted to determine the effectiveness of the solvent systems in removing particulate matter from test surfaces. Silicone residues which can adversely affect bonding characteristics of the metals were identified in cleaning study test. One solvent system composed of alkylarylsulfonic acids, toluene, and dichloromethane gave superior results in breaking down and removing these polymerized compounds. (ERA citation 08:000757)