ЭКСПЕРИМЕНТАЛЬНОЕ ОБОСНОВАНИЕ НОВОГО СПОСОБА ПОДГОТОВКИ И УСТАНОВКИ ЧЕТЫРЕХПУЧКОВОГО АУТОТРАНСПЛАНТАТА ИЗ СУХОЖИЛИЯ ПОЛУСУХОЖИЛЬНОЙ МЫШЦЫ ПРИ ПЛАСТИКЕ ПЕРЕДНЕЙ КРЕСТООБРАЗНОЙ СВЯЗКИ

Purpose: to modify the cortical technique of quadrupled semitendinosus autograft fixation for anterior cruciate ligament reconstruction that enables to achieve tight contact of the tendon within the bone tunnels. Material and methods. Several described methods of graft fixation directed to the formation of maximum contact area between the popliteus tendon graft and the bone are analyzed. In the proposed technique a semitendinosus graft is fixed by cortical fixatives. During graft placement its proximal and distal ends are corrugated and increase in diameter providing additional close intra-tunnel fixation of the graft. Testing for rupture was performed on the material (6 semitendinosus tendons) from 3 cadavers. Potential fixation tightness within the tunnels was assessed by the degree of graft diameter enlargement after its placement. Results. At corrugated sutures tightening the proximal and distal diameters of the graft ends increased by 2.5±0.55 and 2.67±0.55 mm, respectively. Testing for rupture showed elastic deformation mean value of 364.83±69.16 N. Conclusion. The proposed modification for cortical technique of semitendinosus autograft fixation enables to ensure the close contact of the tendon within the bone tunnels and sufficient strength for the patients’ rehabilitation.