[Impression disinfection--clinical tests]

In a series of tests was proved that the disinfection of impressions could be performed without significant dimensional changes of the impressions or loss of quality of the gypsum casts. There still exists, however, certain reservations among dentists and dental technicians to disinfect impressions routinely. Therefore the clinical effects of the disinfection of impressions have been tested. In total 248 impressions were tested, 138 were not disinfected, 110 were immersed for 15 minutes in a 2.5% solution of glutardialdehyd (Cidex). Lateron was controlled if the disinfection had an influence on the correct fitting of the fixed prosthodontics. As the result, the disinfection of impressions can be definitely excluded to be the course for incorrect fitting.