Механические свойства поверхностных Ti-Ni-Ta- и Ti-Ni-Ta-Si-сплавов, синтезированных на подложках из никелида титана

The physical-mechanical properties of Ti-Ni-Ta and Ti-Ni-Ta-Si-based surface alloys of ~1 μm thickness synthesized on the NiTi substrates by the additive thin-film electron beam method were investigated. The effect of these surface alloys on the functional properties of the composite systems [Ti-Ni-Ta surface alloy/TiNi substrate] and [Ti-Ni-Ta-Si surface alloy/TiNi substrate] was explored. It was established that Ti-Ni-Ta-Si based surface alloy with an amorphous structure is characterized by higher gradients of hardness and Young’s modulus in comparison with Ti-Ni-Ta based surface alloy, and has an increased by ~10% and ~2 times greater plasticity compared to the initial NiTi substrate and the Ti-Ni-Ta based surface alloy, respectively. Evaluation of the shape memory effect and superelasticity of the composite systems [Ti-Ni-Ta surface alloy/TiNi substrate] and [Ti-Ni-Ta-Si surface alloy/TiNi substrate] has shown that synthesis of the surface alloy with an amorphous structure results in an almost 2-fold increase in the martensitic shear stress and a significant decrease in the stress hysteresis width compared with the untreated TiNi samples.

Replantation of the Condylar Shoot of Fractured Temporomandular Joint of the Articular Head by TiNi-based Materials

The offered way of restoration of anatomic integrity of the articular head and of the condylar shoot of the temporomandibular joint by the way of modeling of replant at using materials of nickelid titanium alloy (TiNi) with the shape memory allows to conclude about the favorable results of rehabilitation of patients with fragmentary fractures of the articular head of the temporomandibular joint in the remote terms of observation of 8 years.

Antireflux Compression Biliodigestive Anastomoses Formation with the Usage of the TiNi Shape Memory Implant

The usefulness of the anastomotic device for the valve compression anastomoses formation among animals was evaluated. The implant is made of the nickelid titanium alloy (TiNi) in the form of two rounds of the TiNi wire which ends are unbent to the opposite sides. In the area of the unbent rounds the compression isn't carried out, the tissue isn't squeezed. And further there is a formation of the valve. 26antirefluxbiliodigestive compression anastomoses on the small bowel are created during the experiment. They include 13 choledochojejunostomy and 13 cholecystojejunostomy. We studied the terms of the compression devices failure, the mechanical and biological durability of these anastomoses, the primary permeability of anastomoses and carried out the microscopic examination of the compression suture. No complications connected with the use of the compression device were noted. We proved that all the valve compression anastomoses created with using the TiNi shape-memory implant are mechanically and biologically tight. The compression devices eliminated from the zones of anastomoses on the 7th-8th day after the surgery in all cases. The microscopic examination showed the insignificant development of sclerosis in the compression zone and full adaptation of all organ layers. The created valve reduced the reflux of intestinal contents that lessened the probability of development of acute and chronic cholangitis in the postoperative period. The use of the TiNi implant allows to carry out the operation twice quicker. Such anastomosis has high physical durability and small bacteriological permeability.The new way of the formation of valve biliodigestive compression anastomoses allows to create stronger and more reliable anastomoses and prevent the development of typical complications.