Nano-titanium-dioxide coated root canal file and preparation method thereof

A technology of nano-titanium dioxide and root canal files, applied in sputtering plating, ion implantation plating, vacuum evaporation plating, etc., can solve problems such as insufficient strength and wear resistance, toxicity allergies, and unclean root canal cleaning. Achieve the effects of accurate transition temperature, good biocompatibility, good superelasticity and temperature memory effect

Pending Publication Date: 2020-10-30
山西嘉文生物科技有限公司
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Problems solved by technology

However, in the process of manufacturing root canal files, nickel-titanium shape memory alloys have insufficient strength and wear resistance due to the demand for metal toughness, and root canal cleaning is not clean; meanwhile, nickel-titanium shape memory alloys also contain 50% (nominal composition ) of nickel, the same nickel ion precipitation leads to toxic allergies

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  • Nano-titanium-dioxide coated root canal file and preparation method thereof

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Embodiment 1

[0022] A root canal file with a nano-titanium dioxide coating, which uses a nickel-titanium shape memory alloy as a substrate, and prepares a nano-titanium dioxide coating on its surface with a thickness of 60-100nm.

[0023] Further, the nickel-titanium shape memory alloy is a biomedical nickel-titanium shape memory alloy, which is composed of the following mass fraction: nickel 50-51%, the balance is titanium, and the impurity content of the material: oxygen<300ppm, nitrogen< 30ppm.

[0024] The nickel-titanium shape memory alloy is produced by ultra-pure smelting, and the specific preparation method includes the following steps.

[0025] Step 1. Select a crucible with high temperature stability, CaO crucible, so that it cannot be reduced by highly reducible Ti during the smelting process, and the oxide of Ti will be formed to affect the ratio of components. At the same time, due to the accurate ratio of Ni and Ti, it can be obtained The composition is accurately designed t...

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Abstract

The invention relates to the field of biomedical metal products, in particular to a nano-titanium-dioxide coated root canal file and a preparation method thereof. The nano-titanium-dioxide coated rootcanal file takes nickel-titanium shape memory alloy as a matrix, a nano titanium dioxide coating film is prepared on the surface of the matrix, and the thickness of the nano titanium dioxide coatingfilm is 60 nm-100 nm. The nano-titanium-dioxide coated root canal file adopts the Ni-Ti shape memory alloy and has biological functionality, and the mechanical property of the nano-titanium-dioxide coated root canal file is suitable for a human body; and the nano-titanium-dioxide coating film on the surface of the root canal file has biocompatibility of biological ceramic, is non-toxic, has good biological safety, and has great advantages and application prospects. A film coating method adopted in the preparation method of the nano-titanium-dioxide coated root canal file is simple in process,but the film coating effect is good. The nano-titanium-dioxide coated root canal file is safe to use in medicine and good in practicability.

Description

technical field [0001] The invention relates to the field of biomedical metal products, in particular to a nano-titanium dioxide-coated root canal file and a preparation method thereof. Background technique [0002] Dental files are mostly medical austenitic stainless steel, usually with nickel as the main austenitizing element (such as 316L, 317L, etc.), and the nickel content is about 14%. Research and clinical statistics show that nickel can cause allergic reactions in some people, and even cause teratogenicity and canceration. With the deepening of research, more and more attention has been paid to the toxic effect of nickel on the human body. [0003] 316L and 317L stainless steel are widely used metal biomaterials, and root canal files that have been used in large quantities in dentistry are made of such materials. In recent years, nickel-titanium shape memory alloys have been used to manufacture this type of root canal file. Using the shape memory effect and superel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/08A61C5/42
CPCC23C14/35C23C14/083C23C14/0036A61C5/42
Inventor 高淑春仇爱荣王秋实郑碧霄张少骞李家旺
Owner 山西嘉文生物科技有限公司
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