| Autor: |
Anikeev SG; Laboratory of Medical Materials Science, Tomsk State University, 634050 Tomsk, Russia.; Institute of Physics, Kazan Federal University, 420008 Kazan, Russia., Kaftaranova MI; Laboratory of Medical Materials Science, Tomsk State University, 634050 Tomsk, Russia., Hodorenko VN; Laboratory of Medical Materials Science, Tomsk State University, 634050 Tomsk, Russia., Ivanov SD; Department of Pediatric Surgical Diseases, Siberian State Medical University, 634050 Tomsk, Russia., Artyukhova NV; Laboratory of Medical Materials Science, Tomsk State University, 634050 Tomsk, Russia., Shabalina AV; Laboratory of Medical Materials Science, Tomsk State University, 634050 Tomsk, Russia., Kulinich SA; Research Institute of Science and Technology, Tokai University, Hiratsuka 259-1292, Kanagawa, Japan., Slizovsky GV; Department of Pediatric Surgical Diseases, Siberian State Medical University, 634050 Tomsk, Russia., Mokshin AV; Institute of Physics, Kazan Federal University, 420008 Kazan, Russia., Gunther VE; Laboratory of Medical Materials Science, Tomsk State University, 634050 Tomsk, Russia. |
| Abstrakt: |
Alloys based on TiNi are widely used in various fields of technology and medicine. In the present work, we report on the preparation of TiNi-alloy-based wire with the shape-memory effect, which was used for compression clips for surgery. The composition and structure of the wire and its martensitic and physical-chemical properties were studied using SEM, TEM, optic microscopy, profilometry, mechanical tests, etc. The TiNi alloy was found to consist of B2 and B19' and secondary-phase particles of Ti 2 Ni, TiNi 3 and Ti 3 Ni 4 . Its matrix was slightly enriched in Ni (50.3 at.% of Ni). A homogeneous grain structure was revealed (an average grain size of 19 ± 0.3 μm) with equal quantities of grain boundaries of special and general types. The surface oxide layer provides improved biocompatibility and promotes the adhesion of protein molecules. Overall, the obtained TiNi wire was concluded to exhibit martensitic, physical and mechanical properties suitable for its use as an implant material. The wire was then used for manufacturing compression clips with the shape-memory effect and applied in surgery. The medical experiment that involved 46 children demonstrated that the use of such clips in children with double-barreled enterostomies permitted improvement in the results of surgical treatment. |
