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The authors emphasize that cermet and metal plastic dentures should be widely used in practical orthodontics. They suggest new approaches to the selection of indications for the tooth preparation to cast dentures in view of the necessity of coating these dentures. The shortcomings of dentures with titanium nitride coating are disclosed.

Analysis of the type of teeth crown exposure in talking and smiling, carried out in 798 subjects, has shown that the perigingival third of the crowns is not exposed in the majority of the examinees. This permitted employment of cast combined crowns with wide perigingival metal rims to support the clasp dentures to make them look better when supplying 73 patients with partial removable dentures.

The authors suggest a method for making cermet dentures that permits improving by 25-30% the adhesion of porcelain to metal carcass. This method was employed in supplying 162 patients with prostheses. A stronger porcelain-metal compound permitted a sparing preparation of abutment teeth and porcelain coating of 20-50% of the prosthesis metal carcass without deteriorating the strength and aesthetic characteristics of the denture.

It was shown in experiments on rats, dogs, and monkeys, irradiated with x rays or the gamma rays of 60 Co, that a decrease in the indices of phagocytosis is observed only 3-4 weeks after irradiation. It is concluded that the absorptive function of mature neutrophils in radioresistant, and the cells whose maturation occurred after the influence of ionizing radiation are inadequate.