Dental repair material for temporary crowns and bridges and preparation method of dental repair material

A technology for repairing materials and dentistry, which can be used in dental preparations, dentistry, dental prostheses, etc., and can solve the problems of low production efficiency, long molding time, and high cost of preparation time.

Pending Publication Date: 2022-06-24
佛山(华南)新材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molding of methyl methacrylate usually adopts the bulk polymerization method. The traditional bulk polymerization method is generally divided into four steps: pre-polymerization, cooling, water bath curing and high-temperature post-treatment, and the molding time is affected by the thickness of the finished product. The thicker the finished product, the molding time Relatively longer, for example, the thickness of conventional temporary crown and bridge resin products generally ranges from 10 to 30 mm. It usually takes about 45 hours to make a crown and bridge product with a thickness of 30 mm by using the traditional bulk polymerization method. The molding time is long, and the preparation time and cost are high. Production The efficiency is low, and the mechanical properties of the prepared dental restoration materials still need to be improved

Method used

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  • Dental repair material for temporary crowns and bridges and preparation method of dental repair material
  • Dental repair material for temporary crowns and bridges and preparation method of dental repair material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In this embodiment, a dental restoration material for a temporary crown and bridge is prepared, and the specific preparation steps include:

[0022] S1. According to the mass ratio of 10:6:2:3, take silica, alumina, fluorite, and cryolite, put them together in a ball mill, ball mill and mix them at a speed of 120rpm for 8 hours, and then pass through a 500-mesh sieve to obtain an inorganic filler powder;

[0023] S2. Weigh 200g methyl methacrylate, 0.2g azobisisobutyronitrile and 0.3g titanium nickel yellow and titanium dioxide mixed toner (the mass ratio of titanium nickel yellow and titanium dioxide is 1:20) and pour it into In the reactor, after ultrasonic mixing for 30 minutes, weigh 200 g of the inorganic filler powder prepared in step S1, pour it into the reactor while stirring, and after preliminary mixing for 5 minutes, transfer the materials in the reactor to a kneader and mix thoroughly for 30 minutes to prepare got the mixture;

[0024] S3. Fill the mixture...

Embodiment 2

[0026] In this embodiment, a dental restoration material for a temporary crown and bridge is prepared, and the specific preparation steps include:

[0027] S1. Take silicon dioxide, basalt powder, and alumina in a mass ratio of 10:1:6, put them together in a ball mill, and ball mill and mix them at a speed of 120 rpm for 2 hours, and then pass through a 500-mesh sieve to obtain an inorganic filler powder;

[0028] S2, take by weighing the mixed toner of 240g methyl methacrylate, 2.4g azobisisobutyronitrile and 0.4g titanium nickel yellow, iron oxide red and titanium dioxide (the quality of titanium nickel yellow, iron oxide red and titanium dioxide) ratio of 10:1:50) into the reactor, ultrasonically mixed for 30 minutes, weighed 160 g of the inorganic filler powder prepared in step S1, poured it into the reactor while stirring, and mixed the material in the reactor for 5 minutes Transfer to the kneader and fully mix for 45min to prepare the mixture;

[0029] S3. Fill the mixt...

Embodiment 3

[0031] In this embodiment, a dental restoration material for a temporary crown and bridge is prepared, and the specific preparation steps include:

[0032] S1. Take silicon dioxide, cryolite, and alumina according to the mass ratio of 20:7:20, put them together in a ball mill, ball mill and mix at a speed of 120 rpm for 12 hours, and then pass through a 500-mesh sieve to prepare inorganic filler powder;

[0033] S2. Weigh 200g methyl methacrylate, 200g inorganic filler powder, 0.5g initiator dibenzoyl peroxide and 0.2g mixed toner in sequence, wherein the mixed toner has a mass ratio of 1:0.1:0.0001:20 Iron oxide yellow, nickel titanium yellow, carbon nanotubes, titanium dioxide; then pour methyl methacrylate, dibenzoyl peroxide and mixed toner into the reactor, and after ultrasonic mixing for 30 minutes, the inorganic filler powder Pour into the reactor while stirring, and after preliminary mixing for 5 minutes, transfer the material in the reactor to a kneader and fully mix ...

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Abstract

The invention discloses a dental restoration material for temporary crowns and bridges and a preparation method thereof, and the preparation method comprises the following steps: mixing preparation raw materials comprising methyl methacrylate, an inorganic filler, an initiator and a toner to prepare a mixture, injecting the mixture into a mold, and carrying out warm isostatic pressing curing molding to prepare the dental restoration material for temporary crowns and bridges. By adding the inorganic filler, the mechanical property of the dental restoration material can be enhanced, and by adopting a warm isostatic pressing curing molding mode, the curing molding time can be remarkably shortened, the production time cost can be reduced, the production efficiency can be improved, and the mechanical property of the product material can be further improved; further, the prepared dental restoration material has high strength, high modulus and high surface hardness.

Description

technical field [0001] The invention relates to the technical field of dental restoration materials, in particular to a dental restoration material for temporary crowns and bridges and a preparation method thereof. Background technique [0002] Polymethyl methacrylate is a CAD / CAM block repair material with good comprehensive performance. It is cheap, low oral irritation, high biocompatibility, good edge adaptability, easy processing and polishing, and has a unique Color and transparency controllability and stability. However, the strength of polymethyl methacrylate is not high, the modulus and surface hardness are low, and it is easy to wear and tear when used as dental restoration materials such as crowns and bridges, which affects its service life. In this regard, the existing conventional method is to improve the mechanical properties of polymethyl methacrylate by utilizing the reinforcing effect of inorganic fillers. The molding of methyl methacrylate usually adopts t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/891A61K6/15A61K6/71A61K6/76C08F120/14
CPCC08F120/14A61K6/891A61K6/76A61K6/71A61K6/15C08L33/12
Inventor 鲍晓珍李德珊麦耀光杜韩杰崔本仓卢江湖
Owner 佛山(华南)新材料研究院
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