[A new siloxane material for eliminating defects of the soft facial tissues by an injection method. I. The laboratory and experimental research].

The authors present the results of laboratory and clinical analysis of vinyl siloxane polymer-based compositions, Pt catalyzer-hardened. Animal experiments have demonstrated high biologic inertness of the implantation material, inducing virtually no irritation of the adjacent tissues. These results confirm the possibility of clinical use of this new material.

[Replacement of defects in the dura mater with a siloxane elastomer].

The authors discuss the experimental data and information concerning the clinical use of a siloxane elastomer for repairing a defect in the dura mater in 40 patients with various cerebral pathology. Observation over the patients in postoperative periods of up to 34 months, the results of autopsy and repeated operations, and experimental data allow the suggested material to be considered quite adequate and possessing definite advantages over other materials used for the purpose.

[Evaluation of the dynamic stress and quality of intraocular lenses].

Dynamic centrifugal loads exerted by intraocular lenses (IOL) on the ocular tissues during eye movements are studied, and the estimates of the quality of IOLs made of different materials are derived as a function of the density and the refraction index. The increase in the mass of IOLs may be observed under dynamic centrifugal loads depending upon the material, dimensions and the techniques of IOL fixation. The relation between the material quality and its density and refraction index is found thus facilitating the estimation of various materials for IOL manufacture.