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Wear-bionic nano-ceramic composite artificial tooth and method for preparing same

A nano-ceramic, artificial tooth technology, applied in dental preparations, dentistry, dentures and other directions, can solve the problems of shortening the service life of artificial teeth, low chewing efficiency, short service life, etc., to reduce pain and economic burden, reduce wear speed, The effect of improving the service life

Active Publication Date: 2009-09-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Porcelain teeth are widely used for fixed restorations because of their good aesthetic effect, but their disadvantages are: brittle, easy to break; high density, heavy weight, large wear on natural teeth, and its thermal expansion coefficient and base material Mismatched, with high modulus of elasticity, easy to separate from the base, short service life
This mismatch of wear resistance will lead to rapid wear of artificial teeth or natural teeth during long-term use, shortening the service life of artificial teeth, or causing excessive wear of natural teeth, resulting in natural tooth allergies, etc.
Therefore, the clinical service life of the removable dentures made by the existing resin artificial teeth is usually only 1-2 years, and the chewing function of the dentures will obviously decline thereafter, resulting in low chewing efficiency and increased burden on the temporomandibular joint; Re-making dentures increases the financial burden of patients and increases the workload of clinicians

Method used

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  • Wear-bionic nano-ceramic composite artificial tooth and method for preparing same
  • Wear-bionic nano-ceramic composite artificial tooth and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The composition of the artificial tooth of this example is: on the cap ridge of the artificial tooth made of polymethyl methacrylate (PMMA) resin, there are 15 layers of nano-ceramic / resin composite material layers covered, the innermost first layer The content of nano-ceramic material in the composite material layer is 10%, and the content of nano-ceramic in the composite material layer increases gradually from the inside to the outside, and the nano-ceramic content of the outermost layer is 30%; The thickness is 180-220 μm.

[0024] The resin in the nano ceramic / resin composite material layer in this example is a copolymer of methyl methacrylate and methyl acrylate (MMA-MA), wherein the mass ratio of methyl methacrylate to methyl acrylate is 2:1. The nano-ceramics in the nano-ceramic / resin composite material layer in this example are alumina ceramics with a diameter of 70-90 nm.

[0025] The concrete way of the preparation method of the nano-ceramic composite artific...

Embodiment 2

[0037]The structure and preparation method of the artificial tooth in this example and Example 1 are basically the same, the only difference is that in each layer of ceramic / resin composite material, the ratio of nano ceramics to resin is different, and the ratio of this example is shown in the following table Show:

[0038] Nano Ceramic / Resin Complex

[0039] In this example, layers 1-12 are also used to simulate the axon layer of natural teeth whose hardness gradually decreases from outside to inside; layer 13 simulates the sudden drop in hardness at the axon-dentin junction of natural teeth, and layers 14-15 Then, the hardness variation characteristic of the dentin layer of natural teeth is simulated.

Embodiment 3

[0041] The structure and preparation method of the artificial tooth of this example and Example 1 are basically the same, the difference is only: the number of layers of composite material is 12 layers, and in each layer of ceramic / resin composite material, the proportioning ratio of ceramic and resin is different, The proportions in this example are shown in the table below:

[0042] Nano Ceramic / Resin Complex

Composite material layers resin content Nano ceramic content The first layer (outermost layer) 70％ 30％ Second floor 71％ 29％

[0043] the third floor 72％ 28％ fourth floor 74％ 26％ fifth floor 76％ 24％ sixth floor 77％ 23％ seventh floor 78％ 22％ eighth floor 79％ 21％ ninth floor 80％ 20％ tenth floor 85％ 15％ eleventh floor 88％ 12％ The twelfth floor (the innermost floor) 90％ 10％

[0044] In this example, layers 1-9 simulate the axon layer of natural teeth whose hardne...

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Abstract

The invention discloses a wear-bionic nano-ceramic composite artificial tooth, which comprises 12 to 15 layers of nano-ceramic / resin composite material layers covering on lap ridge parts of the artificial tooth made from polymethyl methacrylate resin, wherein the content of the nano-ceramic material in the innermost first composite material layer is 10 percent, the content of the nano-ceramic material in the composite material layers from the inside to the outside increases gradually, and the content of the nano-ceramic material in the outermost layer is 30 percent; and the thickness of each layer of the composite material layers at an occlusal surface is between 180 and 220 mu m. The artificial tooth is well combined with a base tray, has similar wear resistance to a natural tooth, and not only has the characteristics of beautiful appearance and wear resistance of a ceramic tooth, but also has small wear to the natural tooth like a resin tooth. The clinical service life of the artificial tooth of the invention is long.

Description

technical field [0001] The invention relates to an artificial tooth and a preparation method thereof. Background technique [0002] With the aging process of the whole society, the cases of dentition defects are gradually increasing. And people's requirements for quality of life are also constantly improving, and most of the missing natural teeth also require to be replaced by artificial teeth to bring into play its aesthetics and function. Currently clinically used artificial teeth are generally divided into two categories: porcelain teeth and resin teeth. Porcelain teeth are widely used for fixed restorations because of their good aesthetic effect, but their disadvantages are: brittle and easy to break; high density, heavy weight, and large wear on natural teeth; Mismatched, with a high modulus of elasticity, easy to separate from the base, and short service life. Although resin teeth have overcome the shortcomings of porcelain teeth, which have a large proportion and a...

Claims

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Application Information

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IPC IPC(8): A61C13/083A61K6/083
Inventor 于海洋高姗姗
Owner SICHUAN UNIV
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