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Bionic dental implant and preparation method thereof

A technology of implants and bionic teeth, which is applied in prosthetics, tissue regeneration, pharmaceutical formulations, etc., can solve the problems of reduced strength and rigidity, difficulty in bearing oral stress environment, etc., and achieves improved monomer utilization, improved implant success rate, Sufficient effect of chain extension reaction

Inactive Publication Date: 2014-06-11
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the elastic modulus of the metal material decreases, its strength and rigidity also decrease accordingly, and it is difficult to bear the complex stress environment of the oral cavity. If the elastic modulus of the dental implant is simply reduced to solve its biomechanical compatibility Sexual problems, there is a suspicion of neglecting the basics

Method used

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  • Bionic dental implant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the process steps for preparing the bionic dental implant are as follows:

[0026] ① The titanium matrix is ​​a bone screw with a diameter of 4.5mm and a length of 12mm. The titanium matrix is ​​treated with a mixed acid composed of hydrochloric acid and sulfuric acid. The mass concentration of hydrochloric acid is 36%, and the mass concentration of sulfuric acid is 98%. Prepare 20ml Mixed acid, in the mixed acid, the volume ratio of hydrochloric acid to sulfuric acid is 1:1, the treatment method: put the polished titanium substrate into the beaker containing the mixed acid, seal the beaker with plastic wrap and put In a water bath at 60°C, keep the temperature constant for 30 minutes, take out the titanium substrate, and put the titanium substrate in an oven to dry at 50°C;

[0027] Electron beam melting technology is used to deposit titanium dioxide powder layer by layer on the surface of the acid-treated pure titanium substrate to form a porous ti...

Embodiment 2

[0033] In this embodiment, the process steps for preparing the bionic dental implant are as follows:

[0034] ① The titanium matrix is ​​a bone screw with a diameter of 4.5 mm and a length of 12 mm. The acid treatment of the titanium matrix is ​​the same as in Example 1; electron beam melting technology is used to deposit titanium dioxide powder layer by layer on the surface of the acid-treated pure titanium to form a porous Titanium dioxide layer, the particle size of the titanium dioxide powder is 50 μm to 100 μm, the vacuum degree of the electron gun is 0.6Mpa, the power is 5.0kW, the accelerating voltage is 30~60kV, the scanning speed is 800mm / min, and the electron beam current is 2.0mA, The thickness of the porous titanium dioxide layer is 0.20mm;

[0035] ②Use isophorone diisocyanate (IPDI) and polycaprolactone 2000 (PCL-2000) as raw materials to prepare polyurethane prepolymer, mix 10g isophorone diisocyanate (IPDI) with 50g polycaprolactone 2000 (PCL -2000) into a thr...

Embodiment 3

[0040] In this embodiment, the process steps for preparing the bionic dental implant are as follows:

[0041] ① The titanium substrate is a bone screw with a diameter of 4.5 mm and a length of 12 mm. The acid treatment of the titanium substrate is the same as in Example 1; electron beam melting technology is used to deposit titanium dioxide powder layer by layer on the surface of the acid-treated titanium substrate to form a porous Titanium dioxide layer, the particle size of the titanium dioxide powder is 50 μm to 100 μm, the vacuum degree of the electron gun is 0.6Mpa, the power is 5.0kW, the accelerating voltage is 30~60kV, the scanning speed is 800mm / min, and the electron beam current is 2.0mA, The thickness of the porous titanium dioxide layer is 0.25mm;

[0042] ②Use isophorone diisocyanate (IPDI) and polytetrahydrofuran ether glycol 1000 (PTMG-1000) as raw materials to prepare polyurethane prepolymer, mix 12g of isophorone diisocyanate (IPDI) with 25g of polytetrahydrof...

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Abstract

Disclosed is a bionic tooth implant, which comprises a titanium base (1), a porous titanium dioxide layer (2) permeated with polyurethane and a polyurethane layer (3) as bionic tooth peridontium. The porous titanium dioxide layer (2) permeated with polyurethane is located between the titanium base (1) and the polyurethane layer (3). The preparation method of the implant comprises: (1) the titanium base (1) is treated with acid, and then micron-sized titanium dioxide powder is deposited layer-by-layer onto the surface of the titanium base (1) using an electron beam melting technology to form a porous titanium dioxide layer; (2) a polyurethane prepolymer is prepared; (3) the polyurethane prepolymer is coated on the porous titanium dioxide layer, then the polyurethane prepolymer permeates into the holes of the titanium dioxide layer under vacuum conditions; (4) a composite material obtained in step (3) is soaked in a solution of chain extender, and a catalyst is added for reaction, after the reaction is completed, the composite material is taken out and dried.

Description

technical field [0001] The invention belongs to the field of dental implants, in particular to a pure titanium dental implant whose surface is covered with low-modulus periodontal ligament and a preparation method thereof. Background technique [0002] Since Branemark put forward the theory of osseointegration, dental implants have been successfully used to repair the loss of permanent teeth and reconstruct masticatory function. At present, the international well-known brand dental implant systems commonly used at home and abroad (including British Branemark, Swiss ITI, German IMZ, and American 3i) and domestic Leiden BLB and other dental implant systems all use commercial pure titanium as dental implants, but in clinical applications, it is found that Even with imported titanium implants, there are still problems such as loosening, falling off, fracture and inflammation of surrounding bone tissue to varying degrees during use, resulting in implant failure. Long-term clinic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/34A61L27/42A61L27/06
CPCA61L27/06A61L27/34A61L27/42A61L2400/18A61L2430/12
Inventor 张利王立军李玉宝龚梅胡盼胡静李继华
Owner SICHUAN UNIV
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