Dimensional stability of seven elastomeric impression materials immersed in disinfectants

The effect of immersion disinfection procedures on dimensional stability of two elastomeric impression materials

“…When disinfected by immersion, the impression materials exhibited minimal dimensional changes when compared both to the specimens before immersion (Table 3) and to the metal die (Table 4). It must be noted that similar dimensional changes, probably due to the chemical structure of the material and/or disinfectant, have been previously reported (6,19,21,27,28).…”

“…Several studies have been carried out to find an effective disinfection protocol that does not produce any clinically relevant changes in the elastomers, particularly the polyether ones (9,11,13,(15)(16)(17)(18)(19)(20)(21). However, the findings from these studies have not always been univocal, because different exposure times and various combinations of disinfectant solutions and impression materials were used.…”

The effect of disinfection by spray atomization on dimensional accuracy of condensation silicone impressions

“…The fact that both of these impression materials are condensation silicones indicates that extrapolation across different brands within a single generic group is not wise. This finding is in agreement with the results of Martin et al 18 The dimensional changes in the present study which represent expansion of tested impression materials following disinfection are in accordance with the findings of Thouati et al 25 Such an expansion can offset the polymerization shrinkage and therefore improve the precision of the resulting cast. Previous research also confirms the presence of an improvement in the precision of impressions in condensation silicone immersed in the disinfectant.…”

“…9,19 Other studies have also evaluated the possible damage to the quality of the elastomeric materials impression according to the disinfecting products, methods, and time used. 1,8,[22][23][24][25] However, there is limited literature on the effect of disinfection by spraying on the dimensional accuracy of the condensation silicon impression materials. Although condensation silicon impression material is inherently unstable chemical structure because of evaporation of volatile by-products from condensation reaction, it is commonly used in Iran.…”

Estudio in vitro de la alteración dimensional de impresiones con silicona por adición sometidas a desinfección

“…Aun así, esta técnica puede ser utilizada sobre cualquier tipo de material de impresión, siempre y cuando se adapte al antiséptico y el tiempo de inmersión a cada tipo de material (9,(11)(12)(13).…”