journal article·2024-11Open access

A review on surface modification of NiTinol for biomedical applications

Tabassum Billah, Tahmidul Islam Aquib, Kamol Dey

Journal of Materials Science· Volume 59· Issue 41

Abstract

The unique qualities of nickel-titanium alloys (NiTinol) make them promising materials for biomedical applications. Despite the potential benefits, certain issues, such as nickel leaching, raise health concerns. The necessity of treating bare NiTinol before human implantation emphasizes the need for surface modifications that improve biocompatibility without sacrificing the inherent qualities of the alloy. Although NiTinol alloys have been used since the 1960s, a comprehensive review on the surface modification of these alloys is still lacking. In this review article, we have examined all commercially available surface modification techniques applied to NiTinol alloys in depth, including mechanical polishing, chemical etching, heat treatment, ion implantation techniques, coating approaches, sterilization methods, and alloying strategies. The benefits and drawbacks of each technique are explored, with an emphasis on the diverse effects they have on appearance, corrosion resistance, biocompatibility, cell growth, and hemocompatibility. This paper also discusses the current advancements and research on the surface modification of NiTinol as well as its potential for use in biomedical applications. The overall goal of this review is to provide guidance for choosing the right surface treatments that will improve the functionality of NiTi alloys in various biomedical devices.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Shape Memory Alloy Transformations · Bone Tissue Engineering Materials · Titanium Alloys Microstructure and Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

References (100+)

Show source-provided references
1. Gill P et al (2015) Surface modification of Ni-Ti alloys for stent application after magnetoelectropolishing. Mater Sci Eng C 50:37–44. https://doi.org/10.1016/j.msec.2015.01.00910.1016/j.msec.2015.01.009 ↗
2. Rohman G (2014) Materials used in biomaterial applications. In: Migonney V (ed) Biomaterials. Wiley, pp 27–8110.1002/9781119043553.ch3 ↗
3. Sheiko N, Kékicheff P, Marie P, Schmutz M, Jacomine L, Perrin-Schmitt F (2016) PEEK (polyether-ether-ketone)-coated nitinol wire: Film stability for biocompatibility applications. Appl Surf Sci 389:651–665. https://doi.org/10.1016/j.apsusc.2016.07.15910.1016/j.apsusc.2016.07.159 ↗
4. Wadood A (2016) Brief overview on nitinol as biomaterial. Adv Mater Sci Eng. https://doi.org/10.1155/2016/417313810.1155/2016/4173138 ↗
5. Machado LG, Savi MA (2003) Medical applications of shape memory alloys. Brazilian J Med Biol Res 36(6):683–691. https://doi.org/10.1590/S0100-879X200300060000110.1590/S0100-879X2003000600001 ↗
6. Fathyunes L, Sheykholeslami SOR (2020) The surface modification of Nitinol superelastic alloy with alkaline-heat treatment and hydroxyapatite/chitosan composite coating for biomedical applications. J Ultrafine Grained Nanostructured Mater 53(2):166–176. https://doi.org/10.22059/jufgnsm.2020.02.0810.22059/jufgnsm.2020.02.08 ↗
7. Gil FJ, Planell JA (1998) Shape memory alloys for medical applications”. Proc Inst Mech Eng Part H J Eng Med. 212(6):473–488. https://doi.org/10.1243/095441198153423110.1243/0954411981534231 ↗
8. Boccaccini AR, Peters C, Roether JA, Eifler D, Misra SK, Minay EJ (2006) Electrophoretic deposition of polyetheretherketone (PEEK) and PEEK/Bioglass® coatings on NiTi shape memory alloy wires. J Mater Sci 41(24):8152–8159. https://doi.org/10.1007/s10853-006-0556-z10.1007/s10853-006-0556-z ↗
9. Cui YW, Wang L, Zhang LC (2024) Towards load-bearing biomedical titanium-based alloys: From essential requirements to future developments. Prog Mater Sci 144:101277. https://doi.org/10.1016/j.pmatsci.2024.10127710.1016/j.pmatsci.2024.101277 ↗
10. Chrzanowski W, Abou Neel EA, Armitage DA, Zhao X, Knowles JC, Salih V (2010) In vitro studies on the influence of surface modification of Ni-Ti alloy on human bone cells. J Biomed Mater Res - Part A 93(4):1596–1608. https://doi.org/10.1002/jbm.a.3264610.1002/jbm.a.32646 ↗
11. Siu HT, Man HC (2013) Fabrication of bioactive titania coating on nitinol by plasma electrolytic oxidation. Appl Surf Sci 274:181–187. https://doi.org/10.1016/j.apsusc.2013.03.00810.1016/j.apsusc.2013.03.008 ↗
12. Duerig T, Pelton A, Stöckel D (1999) An overview of nitinol medical applications. Mater Sci Eng A 273–275:149–160. https://doi.org/10.1016/s0921-5093(99)00294-410.1016/s0921-5093(99)00294-4 ↗
13. Chakraborty R, Raza MS, Datta S, Saha P (2019) Synthesis and characterization of nickel free titanium–hydroxyapatite composite coating over Nitinol surface through in-situ laser cladding and alloying. Surf Coatings Technol 358(November):539–550. https://doi.org/10.1016/j.surfcoat.2018.11.03610.1016/j.surfcoat.2018.11.036 ↗
14. Dai KR, Hou XK, Sun YH, Tang RG, Qiu SJ, Ni C (1993) Treatment of intra-articular fractures with shape memory compression staples. Injury 24(10):651–655. https://doi.org/10.1016/0020-1383(93)90313-U10.1016/0020-1383(93)90313-U ↗
15. Breschan C, Jost R, Platzer M, Likar R (2006) Nitinol mandril guide wire facilitates percutaneous subclavian vein cannulation in a very small preterm infant [11]. Paediatr Anaesth 16(3):366–368. https://doi.org/10.1111/j.1460-9592.2005.01836.x10.1111/j.1460-9592.2005.01836.x ↗
16. Ing FF, Bierman FZ (1995) Percutaneous transcatheter coil occlusion of the patent ductus arteriosus aided by the nitinol snare: Further observations. Cardiovasc Intervent Radiol 18(4):222–226. https://doi.org/10.1007/BF0023941610.1007/BF00239416 ↗
17. Stepan LL, Levi DS, Carman GP (2005) A thin film nitinol heart valve. J Biomech Eng 127(6):915–918. https://doi.org/10.1115/1.204931110.1115/1.2049311 ↗
18. Hannula SP, Söderberg O, Jämsä T, Lindroos VK (2006) Shape memory alloys for biomedical applications. Mater Clin Appl VII 49:109–118. https://doi.org/10.4028/www.scientific.net/ast.49.10910.4028/www.scientific.net/ast.49.109 ↗
19. Andreasen GF, Hilleman TB (1971) An evaluation of 55 cobalt substituted Nitinol wire for use in orthodontics. J Am Dent Assoc 82(6):1373–1375. https://doi.org/10.14219/jada.archive.1971.020910.14219/jada.archive.1971.0209 ↗
20. Petrini L, Migliavacca F (2011) Biomedical applications of shape memory alloys. J Metal 1–15:2011. https://doi.org/10.1155/2011/50148310.1155/2011/501483 ↗
21. Uo M, Watari F, Yokoyama A, Matsuno H, Kawasaki T (1999) Dissolution of nickel and tissue response observed by X-ray scanning analytical microscopy. Biomaterials 20(8):747–755. https://doi.org/10.1016/S0142-9612(98)00224-510.1016/S0142-9612(98)00224-5 ↗
22. Das K (2008) Nickel, its adverse health effects & oxidative stress. Indian J Med Res 128(4):412–425
23. Barrett RD, Bishara SE, Quinn JK (1993) Biodegradation of orthodontic appliances. Part I. Biodegradation of nickel and chromium in vitro. Am J Orthod Dentofac Orthop 103(1):8–14. https://doi.org/10.1016/0889-5406(93)70098-910.1016/0889-5406(93)70098-9 ↗
24. Haider W, Munroe N (2011) Assessment of corrosion resistance and metal ion leaching of nitinol alloys. J Mater Eng Perform 20(4–5):812–815. https://doi.org/10.1007/s11665-011-9892-510.1007/s11665-011-9892-5 ↗
25. Duda-Chodak A, Blaszczyk U (2008) The impact of nickel on human health. J Elem 13(4):685–696. https://doi.org/10.1142/S021951941000371X10.1142/S021951941000371X ↗
26. Bass JK, Fine H, Cisneros GJ (1993) Nickel hypersensitivity in the orthodontic patient. Am J Orthod Dentofac Orthop 103(3):280–285. https://doi.org/10.1016/0889-5406(93)70009-D10.1016/0889-5406(93)70009-D ↗
27. Block GT (1982) Asthma induced by nickel. JAMA J Am Med Assoc 247(11):1600–1602. https://doi.org/10.1001/jama.247.11.160010.1001/jama.247.11.1600 ↗
28. Wever DJ, Veldhuizen AG, De Vries J, Busscher HJ, Uges DRA, Van Horn JR (1998) Electrochemical and surface characterization of a nickel-titanium alloy. Biomaterials 19(7–9):761–769. https://doi.org/10.1016/S0142-9612(97)00210-X10.1016/S0142-9612(97)00210-X ↗
29. Yang Z (2015) Surface modification of nitinol by electrochemical methods for biomedical applications. ResearchSpace@Auckland
30. Shabalovskaya S, Rondelli G, Rettenmayr M (2009) Nitinol surfaces for implantation. J Mater Eng Perform 18(5–6):470–474. https://doi.org/10.1007/s11665-009-9498-310.1007/s11665-009-9498-3 ↗
31. Shabalovskaya SA, Tian H, Anderegg JW, Schryvers DU, Carroll WU, Van Humbeeck J (2009) The influence of surface oxides on the distribution and release of nickel from Nitinol wires. Biomaterials 30(4):468–477. https://doi.org/10.1016/j.biomaterials.2008.10.01410.1016/j.biomaterials.2008.10.014 ↗
32. Shabalovskaya S, Rondelli G, Anderegg J, Xiong JP, Wu M (2004) Comparative corrosion performance of black oxide, sandblasted, and fine-drawn nitinol wires in potentiodynamic and potentiostatic tests: effects of chemical etching and electropolishing. J Biomed Mater Res - Part B Appl Biomater 69(2):223–231. https://doi.org/10.1002/jbm.b.3000610.1002/jbm.b.30006 ↗
33. Venugopalan R, Trépanier C (2000) Assessing the corrosion behaviour of Nitinol for minimally-invasive device design. Minim Invasive Ther Allied Technol 9(2):67–73. https://doi.org/10.3109/1364570000906305210.3109/13645700009063052 ↗
34. Rondelli G, Vicentini B (2002) Effect of copper on the localized corrosion resistance of Ni-Ti shape memory alloy. Biomaterials 23(3):639–644. https://doi.org/10.1016/S0142-9612(01)00142-910.1016/S0142-9612(01)00142-9 ↗
35. Rondelli G, Vicentini B (1999) Localized corrosion behaviour in simulated human body fluids of commercial Ni-Ti orthodontic wires. Biomaterials 20(8):785–792. https://doi.org/10.1016/S0142-9612(98)90233-210.1016/S0142-9612(98)90233-2 ↗
36. Gu M et al (2014) Is graphene a promising nano-material for promoting surface modification of implants or scaffold materials in bone tissue engineering? Tissue Eng - Part B Rev 20(5):477–491. https://doi.org/10.1089/ten.teb.2013.063810.1089/ten.teb.2013.0638 ↗
37. Tepe G et al (2002) Thrombogenicity of various endovascular stent types: An in vitro evaluation. J Vasc Interv Radiol 13(10):1029–1035. https://doi.org/10.1016/S1051-0443(07)61868-510.1016/S1051-0443(07)61868-5 ↗
38. Liu M, Yue X, Dai Z, Xing L, Ma F, Ren N (2007) Stabilized hemocompatible coating of nitinol devices based on photo-cross-linked alginate/heparin multilayer. Langmuir 23(18):9378–9385. https://doi.org/10.1021/la700299610.1021/la7002996 ↗
39. Wang HR, Liu F, Zhang YP, Yu DZ, Wang FP (2011) Preparation and properties of titanium oxide film on NiTi alloy by micro-arc oxidation. Appl Surf Sci 257(13):5576–5580. https://doi.org/10.1016/j.apsusc.2011.01.04710.1016/j.apsusc.2011.01.047 ↗
40. Clarke B, Carroll W, Rochev Y, Hynes M, Bradley D, Plumley D (2006) Influence of nitinol wire surface treatment on oxide thickness and composition and its subsequent effect on corrosion resistance and nickel ion release. J Biomed Mater Res Part A 79(4):61–70. https://doi.org/10.1002/jbm.a10.1002/jbm.a ↗
41. O’Brien B, Carroll WM, Kelly MJ (2002) Passivation of nitinol wire for vascular implants - A demonstration of the benefits. Biomaterials 23(8):1739–1748. https://doi.org/10.1016/S0142-9612(01)00299-X10.1016/S0142-9612(01)00299-X ↗
42. Chan WS, Gulati K, Peters OA (2023) Advancing Nitinol: From heat treatment to surface functionalization for nickel–titanium (NiTi) instruments in endodontics. Bioact Mater 22:91–111. https://doi.org/10.1016/j.bioactmat.2022.09.00810.1016/j.bioactmat.2022.09.008 ↗
43. Rosenbloom SN, Kumar P, Lasley C (2021) The role of surface oxide thickness and structure on the corrosion and nickel elution behavior of nitinol biomedical implants. J Biomed Mater Res - Part B Appl Biomater. 109(9):1334–1343. https://doi.org/10.1002/jbm.b.3479410.1002/jbm.b.34794 ↗
44. Agarwal N, Gallagher KA, Keaveny S, Carton JG, Brabazon D, Obeidi MA (2024) Influence of processing parameters on the corrosion resistance of additively manufactured nitinol parts for biomedical applications. Results Mater 21:100536. https://doi.org/10.1016/j.rinma.2024.10053610.1016/j.rinma.2024.100536 ↗
45. Safavi MS, Bordbar-Khiabani A, Walsh FC, Mozafari M, Khalil-Allafi J (2023) Surface modified NiTi smart biomaterials: surface engineering and biological compatibility. Curr Opin Biomed Eng 25:1–15. https://doi.org/10.1016/j.cobme.2022.10042910.1016/j.cobme.2022.100429 ↗
46. Bandyopadhyay A, Mitra I, Goodman SB, Kumar M, Bose S (2023) Improving biocompatibility for next generation of metallic implants. Prog Mater Sci 133:101053. https://doi.org/10.1016/j.pmatsci.2022.10105310.1016/j.pmatsci.2022.101053 ↗
47. Marashi-Najafi F, Khalil-Allafi J, Mahdavi S, Hamishehkar H (2024) Influence of core-shell polydopamine-barium titanate doping on the osseointegration and cytotoxicity of the polypyrrole coatings applied by ECD on Nitinol orthopedic implants. J Mater Res Technol 29(February):4373–4383. https://doi.org/10.1016/j.jmrt.2024.02.18010.1016/j.jmrt.2024.02.180 ↗
48. Wu S, Liu X, Yeung KWK, Xu ZS, Chung CY, Chu PK (2012) Wear properties of porous niti orthopedic shape memory alloy. J Mater Eng Perform 21(12):2622–2627. https://doi.org/10.1007/s11665-012-0392-z10.1007/s11665-012-0392-z ↗
49. Tan L, Crone WC, Sridharan K (2002) Fretting wear study of surface modified Ni-Ti shape memory alloy. J Mater Sci Mater Med 13(5):501–508. https://doi.org/10.1023/A:101473522543610.1023/A:1014735225436 ↗
50. Nagaraja S et al (2018) The impact of fatigue testing and surface processing on nickel release in nitinol stents. Shape Mem Superelasticity 4(4):462–471. https://doi.org/10.1007/s40830-018-00196-010.1007/s40830-018-00196-0 ↗
51. Mahtabi MJ, Shamsaei N, Mitchell MR (2015) Fatigue of Nitinol: The state-of-the-art and ongoing challenges. J Mech Behav Biomed Mater 50:228–254. https://doi.org/10.1016/j.jmbbm.2015.06.01010.1016/j.jmbbm.2015.06.010 ↗
52. Ilić B et al (2023) Investigation of ion release and antibacterial properties of TiN-Cu-nanocoated nitinol archwires. Coatings. https://doi.org/10.3390/coatings1309158710.3390/coatings13091587 ↗
53. Moradi MR, Salahinejad E, Sharifi E, Tayebi L (2023) Controlled drug delivery from chitosan-coated heparin-loaded nanopores anodically grown on nitinol shape-memory alloy. Carbohydr Polym 314:1–30. https://doi.org/10.1016/j.carbpol.2023.12096110.1016/j.carbpol.2023.120961 ↗
54. Hamann I, Hempel U, Rotsch C, Leimert M (2020) Biological cell investigation of structured Nitinol surfaces for the functionalization of implants. Materials (Basel) 13(15):1–12. https://doi.org/10.3390/MA1315326410.3390/MA13153264 ↗
55. Milošev I, Kapun B (2012) The corrosion resistance of Nitinol alloy in simulated physiological solutions: part 1: the effect of surface preparation. Mater Sci Eng C 32(5):1087–1096. https://doi.org/10.1016/j.msec.2011.11.00710.1016/j.msec.2011.11.007 ↗
56. Plant SD, Grant DM, Leach L (2005) Behaviour of human endothelial cells on surface modified NiTi alloy. Biomaterials 26(26):5359–5367. https://doi.org/10.1016/j.biomaterials.2005.01.06710.1016/j.biomaterials.2005.01.067 ↗
57. Stoeckel D, Pelton A, Duerig T (2004) Self-expanding Nitinol stents: Material and design considerations. Eur Radiol 14(2):292–301. https://doi.org/10.1007/s00330-003-2022-510.1007/s00330-003-2022-5 ↗
58. Bae I, Kim BH, Kim DG, Sohn IB, Yang SW (2021) Salt heat treatment and passivation to improve the corrosion resistance of nitinol (Ni-ti). Materials (Basel) 14(24):1–12. https://doi.org/10.3390/ma1424778910.3390/ma14247789 ↗
59. Tepe G et al (2006) Reduced thrombogenicity of nitinol stents - In vitro evaluation of different surface modifications and coatings. Biomaterials 27(4):643–650. https://doi.org/10.1016/j.biomaterials.2005.06.00410.1016/j.biomaterials.2005.06.004 ↗
60. Khalili V, Naji H (2020) Developing a mechanochemical surface pretreatment to increase the adhesion strength of hydroxyapatite electrophoretic coating on the NiTi alloy as a bone implant. Surf Coatings Technol 397:125985. https://doi.org/10.1016/j.surfcoat.2020.12598510.1016/j.surfcoat.2020.125985 ↗
61. Dimakos K, Mariotto A, Giacosa F (2016) Optimization of the fatigue resistance of nitinol stents through shot peening. Procedia Struct Integr 2:1522–1529. https://doi.org/10.1016/j.prostr.2016.06.19310.1016/j.prostr.2016.06.193 ↗
62. Olumi S, Sadrnezhaad SK, Atai M (2015) The influence of surface nanocrystallization induced by shot peening on corrosion behavior of NiTi alloy. J Mater Eng Perform 24(8):3093–3099. https://doi.org/10.1007/s11665-015-1570-610.1007/s11665-015-1570-6 ↗
63. Grant DM, Green SM, Wood JV (1995) The surface performance of shot peened and ion implanted NiTi shape memory alloy. Acta Metall Mater 43(3):1045–1051. https://doi.org/10.1016/0956-7151(94)00310-E10.1016/0956-7151(94)00310-E ↗
64. Armitage DA, Grant DM (2003) Characterisation of surface-modified nickel titanium alloys. Mater Sci Eng A 349(1–2):89–97. https://doi.org/10.1016/S0921-5093(02)00818-310.1016/S0921-5093(02)00818-3 ↗
65. Nino-Barrera J, Sanchez-Aleman J, Acosta-Humanez M, Gamboa-Martinez L, Cortes-Rodriguez C (2021) Shot peening increases resistance to cyclic fatigue fracture of endodontic files. Sci Rep 11(1):1–12. https://doi.org/10.1038/s41598-021-92382-x10.1038/s41598-021-92382-x ↗
66. Mukunda S, Mahesh V, Nath N, Herbert MA, Pg M (2022) Effect of low-temperature annealing on the superelastic response and electrochemical corrosion behaviour of equi-atomic Ni-Ti alloy. Adv Mater Process Technol 8(sup3):1113–1125. https://doi.org/10.1080/2374068X.2021.193464710.1080/2374068X.2021.1934647 ↗
67. Chan C-M, Trigwell S, Duerig T (1990) Oxidation of an NiTi alloy. Surf Interface Anal 15(6):349–354. https://doi.org/10.1002/sia.74015060210.1002/sia.740150602 ↗
68. Vojtech D, Joska L, Leitner J (2008) Influence of a controlled oxidation at moderate temperatures on the surface chemistry of nitinol wire. Appl Surf Sci 254(18):5664–5669. https://doi.org/10.1016/j.apsusc.2008.03.01410.1016/j.apsusc.2008.03.014 ↗
69. Firstov GS, Vitchev RG, Kumar H, Blanpain B, Van Humbeeck J (2002) Surface oxidation of NiTi shape memory alloy. Biomaterials 23(24):4863–4871. https://doi.org/10.1016/S0142-9612(02)00244-210.1016/S0142-9612(02)00244-2 ↗
70. Marchenko E, Baigonakova G, Dubovikov K, Kokorev O, Yasenchuk Y, Vorozhtsov A (2022) In vitro bio-testing comparative analysis of NiTi porous alloys modified by heat treatment. Metals (Basel). https://doi.org/10.3390/met1206100610.3390/met12061006 ↗
71. Kwak SW, Shen Y, Liu H, Wang Z, Kim HC, Haapasalo M (2021) Heat treatment and surface treatment of nickel-titanium endodontic instruments. Front Dent Med 2(October):1–6. https://doi.org/10.3389/fdmed.2021.76997710.3389/fdmed.2021.769977 ↗
72. Lekston Z, Stroz D, Drusik-Pawlowska MJ (2012) Preparation and characterization of nitinol bone staples for cranio-maxillofacial surgery. J Mater Eng Perform 21(12):2650–2656. https://doi.org/10.1007/s11665-012-0372-310.1007/s11665-012-0372-3 ↗
73. Yang Z, Wei X, Cao P, Gao W (2013) Surface modification of nitinol by chemical and electrochemical etching. Mod Phys Lett B 27(19):1–7. https://doi.org/10.1142/S021798491341012110.1142/S0217984913410121 ↗
74. Katona B, Bognár E, Berta B, Nagy P, Hirschberg K (2013) Chemical etching of nitinol stents. Acta Bioeng Biomech 15(4):3–8. https://doi.org/10.5277/abb13040110.5277/abb130401 ↗
75. Roth R, Coemert S, Burkhardt S, Rodewald KS, Lueth TC (2020) A Process towards eliminating cytotoxicity by removal of surface contamination from electrical discharge machined nitinol. Procedia CIRP 89(March):45–51. https://doi.org/10.1016/j.procir.2020.05.11710.1016/j.procir.2020.05.117 ↗
76. Constant C, Nichols S, Wagnac É, Petit Y, Desrochers A, Braïlovski V (2020) Biocompatibility and mechanical stability of Nitinol as biomaterial for intra-articular prosthetic devices. Materialia. https://doi.org/10.1016/j.mtla.2019.10056710.1016/j.mtla.2019.100567 ↗
77. Kim J, Park JK, Kim HK, Unnithan AR, Kim CS, Park CH (2017) Optimization of electropolishing on NiTi alloy stents and its influence on corrosion behavior. J Nanosci Nanotechnol 17(4):2333–2339. https://doi.org/10.1166/jnn.2017.1332410.1166/jnn.2017.13324 ↗
78. Mwangi JW, Nguyen LT, Bui VD, Berger T, Zeidler H, Schubert A (2019) Nitinol manufacturing and micromachining: a review of processes and their suitability in processing medical-grade nitinol. J Manuf Process 38:355–369. https://doi.org/10.1016/j.jmapro.2019.01.00310.1016/j.jmapro.2019.01.003 ↗
79. Lee ES, Shin TH (2011) An evaluation of the machinability of nitinol shape memory alloy by electrochemical polishing. J Mech Sci Technol 25(4):963–969. https://doi.org/10.1007/s12206-011-0209-210.1007/s12206-011-0209-2 ↗
80. Ji H, Wang Y, Li Z, Huang Z, Huang Z (2021) Electrolytic polishing test and surface properties of nitinol tube. Int J Electrochem Sci 16(3):1–21. https://doi.org/10.20964/2021.03.4210.20964/2021.03.42 ↗
81. Wang G, Liu Z, Niu J, Huang W, Wang B (2020) Effect of electrochemical polishing on surface quality of nickel-titanium shape memory alloy after milling. J Mater Res Technol 9(1):253–262. https://doi.org/10.1016/j.jmrt.2019.10.05310.1016/j.jmrt.2019.10.053 ↗
82. Conrad JR, Radtke JL, Dodd RA, Worzala FJ, Tran NC (1987) Plasma source ion-implantation technique for surface modification of materials. J Appl Phys 62(11):4591–4596. https://doi.org/10.1063/1.33905510.1063/1.339055 ↗
83. Lotkov AI et al (2015) Interaction of human endothelial cells and nickel-titanium materials modified with silicon ions. AIP Conf Proc. https://doi.org/10.1063/1.493281610.1063/1.4932816 ↗
84. Van Hengel IAJ et al (2020) Self-defending additively manufactured bone implants bearing silver and copper nanoparticles. J Mater Chem B 8(8):1589–1602. https://doi.org/10.1039/c9tb02434d10.1039/c9tb02434d ↗
85. Vidyasagar KEC, Rana A, Kalyanasundaram D (2020) Optimization of laser parameters for improved corrosion resistance of nitinol. Mater Manuf Process. https://doi.org/10.1080/10426914.2020.178492610.1080/10426914.2020.1784926 ↗
86. Wang M, Yang Z, Yang C, Zhang D, Tian Y, Liu X (2020) The investigation of mechanical and thermal properties of super-hydrophobic nitinol surfaces fabricated by hybrid methods of laser irradiation and carbon ion implantation. Warwick Res. Arch. Portal 527:146889
87. Villermaux F, Tabrizian M, Yahia L, Czeremuszkin G, Piron DL (1996) Corrosion resistance improvement of NiTi osteosynthesis staples by plasma polymerized tetrafluoroethylene coating. Biomed Mater Eng 6(4):241–254. https://doi.org/10.3233/bme-1996-640310.3233/bme-1996-6403 ↗
88. Shabalovskaya SA, Rondelli GC, Undisz AL, Anderegg JW, Burleigh TD, Rettenmayr ME (2009) The electrochemical characteristics of native Nitinol surfaces. Biomaterials 30(22):3662–3671. https://doi.org/10.1016/j.biomaterials.2009.03.03410.1016/j.biomaterials.2009.03.034 ↗
89. Bakhshi R, Darbyshire A, Evans JE, You Z, Lu J, Seifalian AM (2011) Polymeric coating of surface modified nitinol stent with POSS-nanocomposite polymer. Colloids Surfaces B Biointerfaces 86(1):93–105. https://doi.org/10.1016/j.colsurfb.2011.03.02410.1016/j.colsurfb.2011.03.024 ↗
90. Davoodian F, Salahinejad E, Sharifi E, Barabadi Z, Tayebi L (2020) PLGA-coated drug-loaded nanotubes anodically grown on nitinol. Mater Sci Eng C. https://doi.org/10.1016/j.msec.2020.11117410.1016/j.msec.2020.111174 ↗
91. Katić J, Metikoš-Huković M, Babić R (2014) Synthesis and characterization of calcium phosphate coatings on Nitinol. J Appl Electrochem 44(1):87–96. https://doi.org/10.1007/s10800-013-0604-810.1007/s10800-013-0604-8 ↗
92. Bogdanski D, Esenwein SA, Prymak O, Epple M, Muhr G, Köller M (2004) Inhibition of PMN apoptosis after adherence to dip-coated calcium phosphate surfaces on a NiTi shape memory alloy. Biomaterials 25(19):4627–4632. https://doi.org/10.1016/j.biomaterials.2003.12.00110.1016/j.biomaterials.2003.12.001 ↗
93. Kong X et al (2002) Effect of biologically active coating on biocompatibility of Nitinol devices designed for the closure of intra-atrial communications. Biomaterials 23(8):1775–1783. https://doi.org/10.1016/S0142-9612(01)00304-010.1016/S0142-9612(01)00304-0 ↗
94. Krause D, Thomas B, Leinenbach C, Eifler D, Minay EJ, Boccaccini AR (2006) The electrophoretic deposition of Bioglass® particles on stainless steel and Nitinol substrates. Surf Coatings Technol 200(16–17):4835–4845. https://doi.org/10.1016/j.surfcoat.2005.04.02910.1016/j.surfcoat.2005.04.029 ↗
95. Dulski M et al (2021) Key properties of a bioactive ag-sio2 /tio2 coating on niti shape memory alloy as necessary at the development of a new class of biomedical materials. Int J Mol Sci 22(2):1–17. https://doi.org/10.3390/ijms2202050710.3390/ijms22020507 ↗
96. Thierry B, Tabrizian M, Savadogo O, Yahia L (2000) Effects of sterilization processes on NiTi alloy: Surface characterization. J Biomed Mater Res 49(1):88–9810.1002/(SICI)1097-4636(200001)49:1<88::AID-JBM11>3.0.CO;2-I ↗
97. Silvaggio J, Lamar Hicks M (1997) Effect of heat sterilization on the torsional properties of rotary nickel-titanium endodontic files. J Endod 23(12):731–734. https://doi.org/10.1016/S0099-2399(97)80344-510.1016/S0099-2399(97)80344-5 ↗
98. Kannan S, Kapoor DN, Tandon P, Gupta A (2012) Evaluation of effects of sterilization on mechanical properties of orthodontic wires. J Indian Orthod Soc 46(3):126–131. https://doi.org/10.5005/jp-journals-10021-107410.5005/jp-journals-10021-1074 ↗
99. Kang YJ et al (2023) Effect from usage and autoclave sterilization on torsional fracture resistance of heat-treated nickel-titanium instruments: an in-vitro study. Front Mater 10(June):1–7. https://doi.org/10.3389/fmats.2023.121578010.3389/fmats.2023.1215780 ↗
100. Stošić N et al (2023) Effects of autoclave sterilization on cyclic fatigue resistance in 5 types of rotary endodontic instruments: an in vitro study. Med Sci Monit 29:1–10. https://doi.org/10.12659/MSM.93969410.12659/MSM.939694 ↗