The dimensional stability of dental impression materials following immersion in disinfecting solutions

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.…”

“…7 The effects of disinfection methods on the accuracy of different impression materials have been investigated. [8][9][10][11][12][13][14][15][16][17][18] Regardless of different methodologies used, previous studies have also shown that the immersion disinfectant has no clinically relevant effect even on hydrophilic materials; 12,[19][20][21] however, other studies have indicated that the dimensional stability of hydrophilic materials is adversely affected by immersion. 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.…”

Disinfection of dental impressions – compliance to accepted standards

“…9 It is therefore not surprising that 95% of the responding technicians had encountered blood-contaminated impressions. The presence of such debris on the surface of the impression will impair the efficacy of the chemical disinfection process 32,33 which is a surface phenomenon. 10 In light of this poor communication between dentist and dental laboratory, which has been noted by others previously, 5,6 it is not surprising that the responding dental technicians were not confident in some cases (35.3%) that the impressions received were disinfected by the dentist.…”

Some factors influencing the stability of Sterilox®, a super-oxidised water

“…1 In dentistry they have been proposed for the removal of bacteria from dental unit water supplies 1 and disinfection of common impression materials, 2 and their antimicrobial and cleaning effectiveness in root canals have been studied. 3,4 Sterilox® is a super-oxidised water currently used to decontaminate endoscopes.…”