Determination of the Effect of TiN Coating on Self-Fitting Properties of Dental Implants Made of NiTi Alloy

Abstract

Design and material research continues to increase dental implants’ success rates, which is a widely applied treatment type. The size and morphology of the implant–bone interface are essential for implant stability. Our study produced a dental implant with two artificial tooth roots from NiTi alloy to increase the implant–bone contact surface. The properties of NiTi alloy, such as transformation temperature and composition, were determined by material characterization tests. Using NiTi alloy’s shape memory effect, these artificial roots at body temperature were programmed with appropriate heat treatments for the self-fitting feature. Dental-implant-like models are coated with TiN to prevent Ni ion release. The corrosion tests were performed in Ringer’s solution to determine the effect of TiN coating on Ni ion release. The nickel ion emission values showed that the TiN coating inhibited the release. In addition, it was determined that the TiN coating increased the shape memory transformation time of the NiTi alloy. In in vitro tests of NiTi and TiN-coated NiTi implants, it was observed that they completed self-fitting by deforming the trabecular bone, but the placement in the cortical bone was not complete. During the use of a shape memory implant, it should complete its transformation without contacting the cortical bone and should not cause a stress concentration.

In Vitro Corrosion and Wear Investigation of Multifunctional TiAlMoN Sputtered Coatings on Cold-Sprayed SS316L

“…17−21 Among them, titanium nitride is widely used in manufacturing cutting tools, orthopedic implants, stamping tools, and bearings and as a decorative material. 22,23 Many researchers have found that TiN coatings are usually characterized by high tribological performance during friction by forming a solid lubricant. 24 Therefore, combining TiN coatings with other elements (e.g., Al, Mo, Cr, etc.)…”

“…Magnetron sputtering is a highly recommended technique for depositing various industrial coatings. , It contributes to a wide application range, including wear-resistant, hard, corrosion-resistant, oxidation-resistant, and decorative coatings with specific optical or electrical properties. It is often used to improve the performance and extend the lifetime of different components such as cutting tools, aircraft fasteners, and proton exchange membrane fuel cells. − Transition metal nitride films have shown good corrosion resistance, high hardness, and excellent electrical conductivity. − Among them, titanium nitride is widely used in manufacturing cutting tools, orthopedic implants, stamping tools, and bearings and as a decorative material. , Many researchers have found that TiN coatings are usually characterized by high tribological performance during friction by forming a solid lubricant. − Therefore, combining TiN coatings with other elements (e.g., Al, Mo, Cr, etc.) presents a remarkable improvement in the hardness and wear resistance.…”