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Degradable appliance dental cast resin for SLA 3D printing and preparation method of same

An appliance and dental mold technology, which is applied in the field of SLA3D printing appliance dental mold resin and its preparation, can solve the problems of non-compliance with the national sustainable development strategy, environmental pollution, and difficulty in degradation, and is conducive to environmental protection and production. Low cost and easily degradable effect

Pending Publication Date: 2020-05-19
SHANDONG HUGE DENTAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at least 52 million personalized dental models need to be produced by 3D printing technology every year, and the annual growth rate is 30-40%, and the dental models are disposable products, so a large amount of plastic waste is generated every year
[0003] At present, the material used for 3D printing orthodontic dental models is ordinary 3D light-curing resin, which is difficult to degrade, pollutes the environment, and does not meet the technical problems of the national sustainable development strategy.

Method used

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  • Degradable appliance dental cast resin for SLA 3D printing and preparation method of same
  • Degradable appliance dental cast resin for SLA 3D printing and preparation method of same

Examples

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Embodiment 1

[0028] The invention provides a degradable SLA 3D printing appliance dental model resin, which comprises the following components by weight percentage: 20-60 parts of hydroxyl acrylate, 10-40 parts of polyurethane acrylate, cellulose-modified polyester 5-15 parts of lactate, 10-30 parts of acrylate monomer, photoinitiator diphenyl-(2,4,6-trimethylformyl)phosphine (TPO) or benzoin dimethyl ether (1065) 0.5-4 parts of one or two of them, 0.5-5 parts of one or more of titanium oxide, zinc oxide and silicon dioxide as inorganic fillers, and 0.1-0.5 parts of defoaming agent.

[0029] Among them, the acrylate monomer and the photoinitiator, under the light irradiation of the laser, make the mixture very easy to undergo photopolymerization reaction, and improve the formation efficiency of the photocuring of the dental mold resin. Among them, cellulose-modified polylactate is a kind of The biodegradable resin can be biodegraded in the soil under normal conditions, so that the dental m...

Embodiment 2

[0031] The present invention also provides a preparation method of a degradable SLA 3D printing appliance dental mold resin: first add 25% of hydroxyl acrylate and 10% of cellulose-modified polylactate into a beaker to obtain a mixture W1, Then add urethane acrylate and acrylate monomer to obtain mixture W2. By adjusting the ratio of urethane acrylate and acrylate monomer, the viscosity of mixture W2 at 25°C is 850cps, and then add 1.4% of photoinitiator in turn to defoam Add 0.1% of the filler to a beaker to obtain a mixture W3, heat the mixture W3 in a water bath at 40°C and stir for 4 hours until it is uniformly mixed to obtain a mixture W4, add 3.5% of the inorganic filler to the mixture W4, and place it in a ball mill to mix uniformly.

[0032] The liquid bio-based photosensitive resin composition has a viscosity of 850cps at 25°C and good fluidity, and can be completely cured after 5-12s using a 405nm SLA laser light source.

[0033] Such as figure 1 The table shows the...

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Abstract

The invention discloses degradable appliance dental cast resin for SLA 3D printing. The degradable appliance dental cast resin is prepared by mixing hydroxyl acrylate, urethane acrylate, cellulose modified polylactic acid ester, an acrylate monomer, a photoinitiator, an inorganic filler and a defoaming agent; wherein the acrylate monomer and the photoinitiator enable the mixture to be subjected toa photopolymerization reaction very easily, so that the photocuring efficiency is improved; the cellulose modified polylactic acid ester enables the dental cast resin to have the advantage of high degradation speed; the added defoaming agent can effectively eliminate bubbles in the resin liquid, so that the quality and the success rate of printed products are improved; the added inorganic fillerdoes not influence the biodegradability, enhances the hardness, compressive strength and notch impact strength of the material, and satisfies the use requirements in the field of oral appliances. Thematerial cost is equivalent to that of a traditional material, and the material has the advantages of being high in degradation speed, high in hardness, high in compressive strength, small in shrinkage rate, convenient to manufacture and low in manufacturing cost.

Description

technical field [0001] The invention relates to a dental mold resin, in particular to a degradable SLA 3D printing appliance dental mold resin and a preparation method thereof. Background technique [0002] Orthodontics is a dental treatment used to improve the alignment, appearance, protruding, crowded or crooked teeth and to correct problems related to the bite of the teeth. With the development of 3D printing, personalized invisible orthodontic braces have gradually won the favor of consumers and orthodontists due to their almost transparent appearance and portable and easy-to-wear features. The number of orthodontic cases in my country is expected to reach about 2.6 million in 2019, and each case needs to wear about 20-30 sets of orthodontic braces. Therefore, at least 52 million personalized dental models need to be produced by 3D printing technology every year, and the annual growth rate is 30-40%, and the dental models are disposable products, so a large amount of pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F283/02C08F220/20C08F220/18C08F2/48B33Y70/00
CPCC08F283/008C08F283/02C08F2/48B33Y70/00
Inventor 张锋
Owner SHANDONG HUGE DENTAL MATERIAL CO LTD
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