METHOD FOR REPLACING EXTENSIVE DEFECTS IN LONG TUBULAR BONES USING 3D PRINTING

The fact that the scientific substantiation and promotion worldwide of the method of Ilizarov is the greatest achievement of domestic medicine, and the method of its use in filling bone deficit of upper and lower extremities have become the gold standard treatment of such patients [7]. It is known that frequent causes of the formation of a massive bone defect are injuries from projectiles with high kinetic energy, local infection, cancer, and excessive surgical aggression [4]. For a long time, the preservation of limb function in such patients was possible only in the case of non-focal transosseous compression-distraction osteosynthesis with non-free bone grafting according To G. A. Ilizarov [7]. However, the duration and result of treatment often did not fully satisfy both the patient and the attending physician [1]. The use of regenerative medicine in the practice of restoring the structural properties of damaged tissues with the help of bioactive implants allows us to count on solving difficult clinical cases in modern traumatology and surgery [12]. The question of replacing extensive defects in long tubular bones has always been relevant for both damage surgery and Oncology. Bone defects often require, in addition to the use of extra-focal transosseous compression-distraction osteosynthesis with non-free bone grafting according to GA. Ilizarov, using bone grafts or prosthetics. Titanium alloy is now widely used in dentistry and orthopedic surgery due to its relative bio-inertness and excellent mechanical and biological properties [5]. Titanium and its combined alloys are superior to all materials available in surgery that are used to replace bulk bone defects [6]. With the advent and development of 3D printing methods using metals, new opportunities for the use of titanium and its alloys have emerged, and it is now possible to create high-precision porous structures to replace bone defects in accordance with clinical needs. During the work, a prototype of the prosthesis model was developed and created using 3D printing, which is promising for further development and implementation in clinical practice

3D-printing, bioimplant, osseointegration, prosthetics, prototype, defect, scaffolds, trauma, cells, bones