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A kind of low elastic modulus titanium-zirconium dental implant material and preparation method thereof
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A dental implant, titanium and zirconium technology, applied in the field of medical oral materials, can solve the problems of unguaranteed strength, low elastic modulus, high elastic modulus, etc., to avoid stress shielding effect, reduce elastic modulus, and good mechanical properties Effect
Inactive Publication Date: 2020-04-14
CENT SOUTH UNIV
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[0005] Although titanium and titanium alloys exhibit excellent performance in mechanical properties and corrosion resistance, traditional titanium alloys generally have a high elastic modulus, and the most widely used clinical Ti-6Al-4V alloys even contain toxic and side effects. Al, V elements
Although tantalum-zirconium alloy has excellent corrosion resistance and good biocompatibility, its low elastic modulus cannot guarantee its strength to meet the requirements of dental implant materials, and the price of tantalum is very expensive
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Embodiment 1
[0029] The mass ratio of zirconium to titanium in the low elastic modulus titanium-zirconium dental implant material is (3:17)˜(7:13).
[0030] Wherein, the particle size of the titanium powder in the low elastic modulus titanium-zirconium dental implant material is 1-22 μm, and the particle size of the zirconium powder is 2-35 μm. The compressive strength of the low elastic modulus titanium-zirconium dental implant material is 1292.8-1498.5 MPa, the elastic modulus is 21.8-22.8 GPa, and the relative density is 94.1%-94.5%.
Embodiment 2
[0032] The method for low elastic modulus titanium-zirconium dental implant material described in embodiment 1 comprises the steps:
[0033] 1. According to the ratio of zirconium powder and titanium powder mass ratio of 3:17, weigh 15.0g zirconium powder and 85.0g titanium powder respectively with a balance. The powder requires that the oxygen content is less than 0.3%, and the carbon content is less than 0.02%. The titanium-zirconium composite powder is obtained after powder ball milling.
[0034] 2. The titanium-zirconium composite powder obtained after ball milling was pressed and formed under a press. Each sample weighed 4.8 g and was formed under a pressure of 150 MPa. There was no edge or corner loss, and the surface of the compact was smooth.
[0035] 3. Place the compacted sample in a tungsten crucible, put it into a vacuum furnace for sintering, and pump the vacuum degree of the vacuum furnace to 10 -3 Pa. Then the temperature in the vacuum furnace was raised from ...
Embodiment 3
[0039] The method for low elastic modulus titanium-zirconium dental implant material described in embodiment 1 comprises the steps:
[0040]1. According to the atomic ratio of titanium powder and zirconium powder of 1:3, weigh 25.0g zirconium powder and 75.0 g titanium powder respectively with a balance. The titanium-zirconium composite powder is obtained after powder ball milling.
[0041] 2. The titanium-zirconium composite powder obtained after ball milling was pressed and formed under a press. Each sample weighed 5.2g and was formed under a pressure of 150MPa. There was no edge or corner loss, and the surface of the green compact was smooth.
[0042] 3. Place the compacted sample in a tungsten crucible, put it into a vacuum furnace for sintering, and pump the vacuum degree of the vacuum furnace to 10 -3 Pa. Then the temperature in the vacuum furnace was raised from room temperature to 800°C at a rate of 5°C / min, and kept for 1 hour; then raised to 1200°C at a rate of 5°C...
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Abstract
The invention relates to a low-elastic-modulus titanium-zirconium dental implant material and a preparation method thereof. The low-elastic-modulus titanium-zirconium dental implant material has needle-shaped and lamellar precipitated structures in the sintering and cooling processes, the structures are beneficial for titanium-zirconium alloy to obtain good mechanical property and biocompatibility. The preparation method comprises the following steps that titanium-zirconium powder is uniformly mixed according to a certain ratio, after pressing and forming are completed, in the protective atmosphere, the temperature is increased to 800 DEG C for heat preservation, finally vacuum sintering is carried out at 1200-1300 DEG C, and the low-elastic-modulus titanium-zirconium dental implant material is obtained. According to the low-elastic-modulus titanium-zirconium alloy, the relative density is 94.1%-94.5%, the compressive strength is changed within the range of 1292.8-1498.5 MPa, the elastic modulus is changed within the range of 21.8-22.8 GPa, the elasticity modulus is relatively low under the condition that the strength is guaranteed, the dental implant material is good in mechanicalcompatibility with an upper jaw bone and a lower jaw bone of a human body, and is good in biocompatibility with epithelium and fiber tissues of an oral cavity; and the preparation method is simple, and the dental implant material is an relatively ideal low-elastic-modulus dental implant material.
Description
technical field [0001] The invention belongs to the field of medical oral cavity materials in medical composite materials, and in particular relates to a low elastic modulus titanium-zirconium dental implant material and a preparation method thereof. Background technique [0002] Biomedical composite materials in biomaterials are mainly used to replace damaged or missing human tissue structures to achieve the purpose of restoring tissue shape and performance. During the implantation process of this material, the issue of biocompatibility needs to be considered, and the mechanical compatibility requires that the mechanical properties of the implanted material be adapted or matched with human tissue. If the strength is too low, the material will be fractured and unstable, and if it is too high, it will cause damage to the surrounding tissue, making it difficult for the implanted site to heal for a long time, that is, the "stress shielding" effect. [0003] Dental implant mate...
Claims
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