A preparation method of gutta-percha tip composite material suitable for sls printing

A composite material and gutta-percha technology, which is applied in the field of preparation of gutta-percha tip composite materials, can solve the problems of lack of individuality and the accuracy of tooth roots needs to be improved, and achieve excellent antibacterial effect, good mechanical properties and good biocompatibility. Effect

Active Publication Date: 2021-02-23
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A preparation method of gutta-percha tip composite material suitable for sls printing
  • A preparation method of gutta-percha tip composite material suitable for sls printing
  • A preparation method of gutta-percha tip composite material suitable for sls printing

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Embodiment 1

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

[0032] (1) Modify nano-barium sulfate and nano-zinc oxide respectively, and then make suspensions according to the mass ratio of modified nano-barium sulfate or modified nano-zinc oxide:ethylene glycol 1:20 respectively; the modification treatment includes the following Steps: first dissolve the titanate coupling agent in an appropriate amount of ethanol at 45°C, add an appropriate amount of nano barium sulfate, the mass ratio of nano barium sulfate: titanate coupling agent: absolute ethanol is 15:4:100, Set the stirring speed at 300r / min and the modification time at 60min for surface treatment and modification. After the reaction, filter with suction, wash the filter cake with absolute ethanol, and heat it in a vacuum oven set at 60°C to Drying, then pulverizing and refining with a fast pulverizer with a rotation speed of 1500r / min, and passing th...

Embodiment 2

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

[0040] (2) Modify nano-zirconia and nano-silver respectively, and then make a suspension according to modified nano-barium sulfate or modified nano-silver: isopropanol = 1:20; the modification process includes the following steps: first Dissolve stearic acid in an appropriate amount of absolute ethanol at 40°C, add an 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 40 minutes for surface treatment and modification. After the reaction is completed, suction filter, wash the filter cake with absolute ethanol, and heat to dry in a vacuum oven with a set temperature of 80°C, and then set the rotation speed to 2000r / Min’s fast pulverizer pulverizes, refines, and passes through a sieve of more than 300 meshes to finally obtain modified nano-zirc...

Embodiment 3

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

[0048] (3) Modify nano-barium sulfate and nano-zinc oxide respectively, and then prepare suspensions according to modified nano-barium sulfate or modified nano-zinc oxide: ethylene glycol = 1:20; modification includes the following steps : First dissolve oleic acid in an appropriate amount of ethanol at 40°C, add appropriate amount of nano-barium sulfate and nano-zinc oxide, nano-barium sulfate: oleic acid: absolute ethanol = 15:4:100, set the stirring speed to Surface treatment and modification under the conditions of 400r / min and modification time of 70min. After the reaction, filter with suction, wash the filter cake with absolute ethanol, and heat to dry in a vacuum oven with a set temperature of 80°C. The fast pulverizer set at 3000r / min pulverizes, refines, and passes through a sieve of more than 300 meshes to finally obtain modified nano-bar...

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Abstract

The invention discloses a preparation method of a gutta-percha tip composite material suitable for SLS printing, which comprises the following steps: modifying a blocking agent and an antibacterial agent, and then making a suspension in an organic solvent B; polymerizing a polymer Compound, modified additive A and organic solvent A are mixed to obtain a modified polymer solution; the prepared suspension is mixed with the prepared modified polymer solution according to a certain ratio, and then dried, and finally a suitable for SLS printing is obtained. Composite powder. The gutta-percha tip printed with the material prepared by the invention has good mechanical properties, excellent antibacterial effect and good biocompatibility, high production and processing precision, smooth printing, and can be widely used in the field of biomedicine, especially in the field of stomatology , can improve the accuracy of root canal treatment, and provide a new way to reduce the failure rate of root canal treatment.

Description

technical field [0001] The invention belongs to the technical fields of SLS additive manufacturing and stomatology, and in particular 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 based on digital models, which constructs objects by layer-by-layer accumulation of materials, and then realizes reverse manufacturing. With the gradual maturity of this technology and the vigorous development of material manufacturing technology, the application of 3D printing in the field of biomedicine has gradually increased, and it has great development potential in the field of precision and individualized medicine. The basic operation of Selective Laser Sintering (SLS) is to spread a layer of powder material evenly on the working platform with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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