[Elastic stress distribution in cases of half-crowns use].

Elastic stress distribution in abutment teeth, cement layer and abutment elements themselves was compared in cases of traditional half-crown and modified half-crown use. The results of the study let the authors come to the conclusion that when preparation rules were followed and exact adjustment the modified half-crown had advantages and could be used successfully.

[Prophylaxis and treatment of eventration after relaparotomy].

A method of prophylaxis and treatment of eventrations after relaparotomy using apparatus of transtissue fixation was fested clinically. The apparatus was used in 24 patients with acute abdominal surgical disease subjected to relaparotomy. The apparatus of transtissue fixation permits to shorten time of operation, to make easier the work of surgeon and assistants, to minimize damage to sutured inflamed tissues.

[Means for volumetric fire extinguishing in inhabited facilities].

The authors discuss the problem concerning the substitution of ozone-destroying fire extinguishing halogen hydrocarbons 13B1, 12B1 and 114B2 with alternative means of volumetric fire extinguishing. The toxicological-and-hygienic characteristics of chladon 13B1 and of the new ozone-harmless extinguishers (chladons 124B1 and 125, sulphur hexafluoride and aerosol-forming means of volumetric fire extinguishing) are shown.