A. Thouati et al., DIMENSIONAL STABILITY OF 7 ELASTOMERIC IMPRESSION MATERIALS IMMERSED IN DISINFECTANTS, The Journal of prosthetic dentistry, 76(1), 1996, pp. 8-14
Dental impressions can increase the transmission of microorganisms and
infections. The purpose of this study was to assess the influence of
three disinfectant solutions on the dimensional accuracy of seven elas
tomeric impression materials. Impressions of a test block were either
left untreated (controls) or treated by immersion in a disinfectant so
lution, Measurements were taken on die stone replicas of the impressio
ns. Comparisons mere made between (1) the measurements for the variati
ons in the nontreated impressions and those for the treated impression
s and (2) measurements for the treated impressions and the test block.
Results indicated that the aminoamphoteric agent or glutaraldehyde de
rivative-based solutions created little change in relation to the init
ial dimensional accuracy of the impression products. However, the sodi
um hypochlorite solution often leads to expansion by comparison with c
ontrols. By comparison to the test block, this expansion then makes it
possible in most cases to obtain better dimensional accuracy than ini
tially. Within the limits of this study this expansion could lead to a
n improvement in clinical fixed prosthodontic procedures.