[Studies into the effectivity of Caridex in caries removal]. / Untersuchungen über die Effektivität von Caridex bei der Kariesentfernung.

It was the goal of this study to find out if Caridex is a reliable method for removing dentine caries. Different lesions on 37 teeth were treated with the system and subsequently examined for caries. The macroscopic results were verified using undecalcified thin sections stained with toluidine blue and examined for residual caries under the light microscope. Even after applying the system for as long as 30 minutes there were only two cases where the floor of the cavity could be referred to as caries-free, while none of the enamel/dentin interfaces was caries-free in the cases treated. Histologically four preparations could be considered caries-free. The use of the Caridex system alone produced no satisfactory results.

K2-tartarate gradient centrifugation in the isolation of purified influenza virus haemagglutinin after bromelain cleavage.

A method of haemagglutinin (HA) purification by means of K2-tartarate gradient centrifugation is described. Different influenza virus strains possessing the antigenic formulas H1N1, H2N2 and H3N2 yielded pure and immunologically active HA samples.