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Relevance of research. The inclusion of light synthetic materials in the structure of strengthening zones is one of the ways to improve the efficiency of hernioplasty. Purpose. To compare functional effectiveness of the light endoprosthesis and the light strengthened polypropylene one for hernioplasty on the base of studying biomechanical characteristics of anterior abdominal wall tissues after endoprostheses' implantation in experiment. Materials and methods. Experimental studies were conducted on 36 rabbits of “chinchilla” breed. All animals were divided into 2 series of experimentsThe light polypropylene endoprosthesis was implanted to rabbits from the first (control) group. A new cancellated  endoprosthesis from monofilamentous polypropylene consists of the basic and strengthened zones in the form of horizontally located, alternating with each other monothreads of the high thickness.  It was implanted to animals from second (experimental) group. Pathomorphological changes and biomechanical properties of the abdominal wall tissues were studied macroscopically in the experiment by implantation of endoprostheses in onlay position on the 7th, 30th and 90th days. Results and their discussion. There was proved that in direction of the loop column as well as in the loop row after implantation of the studied materials breaking load increased from the 7th to the 90th day of experiment, that was related to the formation of the connective tissue capsule around materials. The light strengthened endoprosthesis was more durable and stronger in 1,6 times compare to the light analog at all stages of observation. Along the loop column there was no significant difference detected. In both series of experiment in the direction of the loop column as well as in loop row the reduction of sample lengthening took place. Along the loop column indicators of lengthening, characterizing elasticity of the prosthesis aponeurosis, in the series of the light strengthened endoprosthesis were 1,4-1,6 times lower than in its light analog. Along the loop row there was no significant difference of indicators. Conclusion . Introduction of the strengthened zones in a light endoprosthesis increases its durability with preservation of the material’s elasticity.

Biomechanical Characteristics of Light Synthetic Materials for Hernioplasty (Experimental Study)