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Preparation method of gutta percha point composite material suitable for SLS printing

A technology of composite materials and gutta-percha, which is applied in the field of preparation of gutta-percha tip composite materials, can solve the problems of lack of personalization and the need to improve the precision of tooth roots, and achieve excellent antibacterial effects, good mechanical properties, and improved precision.

Active Publication Date: 2020-01-17
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 103709582 B discloses a gutta-percha material prepared from polyolefin, SEBS, ethylene octene block copolymer, antioxidant and mineral fillers. It adopts injection molding to produce thermoplastic gutta-percha, which meets the standard specifications. no personalization
Chinese patent CN 108676348 A discloses a pulp cavity glue composite material prepared by fused deposition 3D printing, which is prepared from high molecular polymers, antibacterial agents, blocking agents, diffusing oils, additives and sex agents. The tensile strength The maximum bending strength is 51.3 MPa, and the maximum bending strength is 58.2 MPa, but the accuracy of the printed tooth root needs to be improved, such as Figure 4 shown

Method used

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  • Preparation method of gutta percha point composite material suitable for SLS printing
  • Preparation method of gutta percha point composite material suitable for SLS printing
  • Preparation method of gutta percha point composite material suitable for SLS printing

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A preparation method of gutta-percha-tip composite material suitable for SLS printing includes the following steps:

[0032] (1) The nano barium sulfate and nano zinc oxide are modified respectively, and then the suspension is made according to the modified nano barium sulfate or modified nano zinc oxide: ethylene glycol mass ratio 1:20; the modification treatment includes the following Steps: First dissolve the titanate coupling agent in an anhydrous ethanol at 45°C, add an appropriate amount of nano-barium sulfate, nano-barium sulfate: titanate coupling agent: anhydrous ethanol with a mass ratio of 15:4:100, Set the stirring speed to 300r / min and the modification time to 60min under the condition of surface treatment and modification. After the reaction is completed, filter with suction, wash the filter cake with absolute ethanol, and heat it in a vacuum oven set at 60℃ Dry, then use a fast pulverizer with a rotation speed of 1500r / min to pulverize and refine, and pass t...

Embodiment 2

[0039] A preparation method of gutta-percha-tip composite material suitable for SLS printing includes the following steps:

[0040] (2) The nano-zirconia and nano-silver are modified separately, and then the suspension is prepared according to the modified nano-barium sulfate or modified nano-silver: isopropanol=1:20; the modification treatment includes the following steps: Dissolve stearic acid in an appropriate amount of 40℃ in absolute ethanol, add appropriate amount of nano zirconia, nano zirconia: stearic acid: absolute ethanol = 15: 6: 120, set the stirring speed to 400r / min and The modification time is 40min under the condition of surface treatment modification. After the reaction is completed, suction filter, wash the filter cake with absolute ethanol, and heat it to dryness in a vacuum oven set at 80℃, and then set the speed to 2000r / Min rapid pulverizer crushed, refined, and passed through a sieve of more than 300 mesh, and finally obtained modified nano-zirconia; prep...

Embodiment 3

[0047] A preparation method of gutta-percha-tip composite material suitable for SLS printing includes the following steps:

[0048] (3) The nano barium sulfate and nano zinc oxide are modified separately, and then the suspension is made according to the modified nano barium sulfate or modified nano zinc oxide: ethylene glycol=1:20; the modification treatment includes the following steps : First dissolve oleic acid in an appropriate amount of 40℃ in absolute ethanol, add appropriate amounts of nano barium sulfate and nano zinc oxide, nano barium sulfate: oleic acid: absolute ethanol = 15: 4: 100, set the stirring speed as Surface modification is performed under the conditions of 400r / min and modification time of 70min. After the reaction is completed, suction filter, wash the filter cake with absolute ethanol, and heat it to dryness in a vacuum oven set at 80℃, and then use rotation speed A fast pulverizer set at 3000 r / min is crushed, refined, and passed through a sieve of 300 me...

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Abstract

The invention discloses a preparation method of a gutta percha point composite material suitable for SLS printing. The preparation method comprises the following steps that a blocking agent and an antibacterial agent are subjected to modifying treatment, and then suspension liquid is prepared in an organic solvent B; a high molecular polymer, a modified additive and an organic solvent A are mixedto obtain a modified high molecular solution; and the prepared suspension liquid is mixed with the prepared modified high molecular solution according to a certain ratio, and then drying is carried out to finally obtain composite powder suitable for SLS printing. Gutta percha points printed by the material prepared by the preparation method is good in mechanical properties, excellent in antibacterial effect, good in biocompatibility, high in production and processing precision, smooth in printing, and widely used in the field of biomedicine, especially in the field of oral medicine; and the accuracy of root canal therapy can be improved, and a new way is provided for reducing the failure rate of root canal therapy.

Description

Technical field [0001] The invention belongs to the technical field of SLS additive manufacturing and stomatology, and specifically relates to a preparation method of a gutta-percha tip composite material suitable for SLS printing. Background technique [0002] In recent years, due to the rapid development of digital technology, 3D printing technology has gradually entered the field of biomedicine. 3D printing is a technology that is based on digital models and builds objects by stacking materials layer by layer to achieve reverse manufacturing. With the gradual maturity of this technology, material manufacturing technology has been vigorously developed, and the application of 3D printing in the field of biomedicine has gradually increased, and it has huge development potential in the field of precision and personalized medicine. The basic operation of selective laser sintering technology (SLS) is to use a powder spreading stick to spread a layer of powder material evenly on the...

Claims

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Application Information

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IPC IPC(8): A61K6/00A61K6/878A61K6/849
Inventor 周武艺万美玲杨子俊袁杜娟董先明郑文旭
Owner SOUTH CHINA AGRI UNIV
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