Antibacterial cross-scale reinforced resin-matrix composite material for dentistry and preparation method thereof

A reinforced resin-based, composite material technology, applied in dental preparations, dentistry, dental prostheses, etc., can solve the problems of not having antibacterial properties, achieve good biological safety, reduce the incidence of secondary caries, and facilitate reasonable distribution Effect

Active Publication Date: 2021-01-08
NANFANG HOSPITAL OF SOUTHERN MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing deficiencies in interface properties also suggest that improving the interface properties between PBO fibers and resin matrix is ​​the key point that must be paid attention to when introducing high-performance PBO fibers.
At the same time, none of the existing fiber posts have antibacterial properties. When used in the oral cavity for a long time, secondary caries in the dental tissue around the fiber post is also one of the main reasons for its failure.

Method used

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  • Antibacterial cross-scale reinforced resin-matrix composite material for dentistry and preparation method thereof
  • Antibacterial cross-scale reinforced resin-matrix composite material for dentistry and preparation method thereof
  • Antibacterial cross-scale reinforced resin-matrix composite material for dentistry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 Preparation of cross-scale reinforcement

[0042] (1) Fiber decoating: Purify 2m PBO fibers with 200 mL of a mixed solution of ethanol and acetone (volume ratio 1:1) in a Soxhlet extractor for 24 hours to remove low-molecular polymers and pollutants on the PBO surface. Then rinse with 200mL deionized water for 5 times for later use to obtain decoated PBO fibers (D-PBO). D-PBO was the control group.

[0043] (2) Oxidation treatment: Immerse the decoated PBO fiber in 60% sulfuric acid, oxidize its surface at room temperature for 4 hours, rinse it repeatedly with deionized water until neutral, and bake it at 100 ° C. Dry for later use to obtain oxidized PBO fibers (O-PBO).

[0044] (3) Carboxylation treatment: Add 12g of sodium hydroxide to 100mL of water to dissolve, then put O-PBO into it, after ultrasonic oscillation for 30min, weigh 10g of chloroacetic acid and add it to the above solution, and then dry it for later use after ultrasonication for 3h to obtai...

Embodiment 2

[0049] Example 2 Construction of cross-scale reinforced monofilament mechanical model and evaluation of interface binding performance

[0050] (1) The preparation of the cross-scale reinforcement is the same as in Example 1.

[0051] (2) Construction of monofilament mechanical model and measurement of interfacial bonding properties of monofilament-resin composites

[0052] The fiber-resin bonding properties were analyzed by a single-filament pull-out test to determine the interfacial shear strength of the single-fiber-resin composites. During the test, the pull-out rate is 0.5 μm / s, measure and record the maximum debonding force, and end the test when the maximum debonding force appears. The schematic diagram of the specific sample preparation process is shown in figure 1 .

[0053] Each group of cross-scale reinforcement phases was divided into two groups, and two kinds of resin matrices were selected to prepare monofilament pull-out test samples, respectively: (1) pure Bi...

Embodiment 3

[0065] Example 3: Preparation of Cross-Scale Reinforced Composite Materials

[0066] (1) Preparation of cross-scale reinforcement (same as Example 1)

[0067] (2) Molding and processing of composite materials

[0068] A) Preparation of resin matrix glue: a total of two resin matrix glues are prepared for use, including Bis-GMA pure resin matrix glue without adding zinc oxide nanoparticles and added with the selected mass ratio (1.0wt%) Bis-GMA resin matrix glue of zinc oxide nanoparticles. According to the ratio of Bis-GMA:TEGDMA=1:1, a total of 198g of resin glue was prepared, and stirred evenly for 30 minutes in the dark, and zinc oxide nanoparticles with a mass ratio of 0.0% and 1.0% were added, and mixed for 30 minutes; finally, a photoinitiator was added 0.2g of CQ and 0.8g of DMAEMA (, mixed for 30min and placed in a vacuum oven at room temperature for 2h of degassing. Stir well and keep away from light for later use.

[0069] B) Fiber prepreg preparation: figure 1 S...

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Abstract

The invention relates to an antibacterial cross-scale reinforced resin-matrix composite material for dentistry and a preparation method thereof, and aims to solve the technical problems of insufficient flexural strength and no antibacterial property of an existing fiber pile. The cross-scale reinforced resin-matrix composite material comprises a light-cured Bis-GMA resin matrix and a cross-scale reinforced phase, wherein the cross-scale reinforced phase is PBO fiber-linear nano zinc oxide or PBO fiber-linear nano zinc oxide-POSS; and the light-cured Bis-GMA resin matrix is composed of a resinglue solution prepared from Bis-GMA and TEGDMA in a ratio of 1: 1, 0.0 wt% to 1.0 wt% of zinc oxide nanoparticles and a photoinitiator. The preparation method comprises the step of compounding the cross-scale reinforced phase and the light-cured Bis-GMA resin matrix by adopting a light-cured molding process under step-by-step impregnation pretension. The flexural strength of the cross-scale reinforced resin-matrix composite material is 975.15 + / -41.87 to 1334.59 + / -44.94 MPa under a static load, the flexural modulus of the cross-scale reinforced resin-matrix composite material is equivalent tothe flexural modulus of human dentin, and the cross-scale reinforced resin-matrix composite material has bacterium adhesion resistance and is very suitable for manufacturing dental fiber piles.

Description

technical field [0001] The invention relates to a dental resin-based composite material and a preparation method thereof, in particular to a dental cross-scale reinforced resin-based composite material with antibacterial properties and a preparation method thereof. Background technique [0002] In the field of dental root canal post materials, fiber-reinforced resin matrix composites (Fiber-reinforced resin matrix composites, FRMMC) have been widely developed and applied. And root fracture phenomenon caused by high modulus of elasticity of ceramic post. However, its flexural strength is far lower than that of traditional metal posts. When repairing large residual crowns and roots with large defects, the fiber post itself is often prone to breakage, which severely limits its clinical application. [0003] The performance of FRMMC is the result of the joint action of fiber and resin matrix. Among them, the fiber reinforced phase bears more than 70% of the total force of the c...

Claims

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Application Information

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IPC IPC(8): A61K6/887A61K6/891A61K6/71A61K6/15
CPCA61K6/15A61K6/71A61K6/887A61K6/891C08L35/02C08L79/04
Inventor 胡琛林于晴杨宇君邵龙泉冯晓黎陈静晓
Owner NANFANG HOSPITAL OF SOUTHERN MEDICAL UNIV
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