Fiber reinforced composite material for dental root canal post and preparation method thereof

A composite material and fiber reinforced technology, applied in the direction of dental preparation, fiber type, fiber treatment, etc., can solve the problems of elastic modulus mismatch, difficult matrix bonding, easy corrosion and sensitization, etc., to improve repair life and improve deflection. performance, avoiding the effect of delamination between layers

Inactive Publication Date: 2014-10-15
NANFANG HOSPITAL OF SOUTHERN MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many materials that can be used for dental root canal posts, but they all have shortcomings: traditional metal alloy posts have poor aesthetics, are prone to corrosion and sensitization, and high elastic modulus can easily cause tooth root fracture; ceramic posts have good aesthetics and biological characteristics. Capacitance, but its elastic modulus is still much higher than that of dentin; the appearance of fiber-resin composite material has successfully solved the problem of serious mismatch of elastic modulus between post and dentin, effectively avoiding the occurrence of tooth root fracture
Although the performance of PBO fiber itself is excellent, its biggest disadvantage is that the surface is inert and it is not easy to combine with the matrix.

Method used

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  • Fiber reinforced composite material for dental root canal post and preparation method thereof
  • Fiber reinforced composite material for dental root canal post and preparation method thereof
  • Fiber reinforced composite material for dental root canal post and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: Preparation of thermosetting fiber resin composite material:

[0029] Raw materials: bisphenol A epoxy resin (E-51, epoxy value 0.48~0.54eq / 1009); methyltetrahydrophthalic anhydride (MeTHPA, analytically pure); 2,4,6-tris(dimethylaminomethyl ) phenol (DMP-30, chemically pure); PBO fiber (Zylon AS, Toyobo, Japan); silane coupling agent (Z-6040, Dow Corning, USA); acetone (analytical grade); deionized water; TiO 2 (particle size 25nm, Sigma Company, USA); titanate coupling agent (Sigma Company, USA); ether diluent; tetra-n-butyl titanate; triethanolamine; absolute ethanol.

[0030] (1) Resin-based nano-toughening

[0031] A. Nano-TiO 2 Pretreatment: take nano TiO 2 0.5% to 1.0% titanate coupling agent of the mass of the pellets, use 2 to 5 times the ether diluent, adjust the pH value to 7 to 9, fully disperse for 30 minutes with a high-speed emulsifying shearer, add the pellets and stir well , and then raise the temperature to 100-120°C, disperse for an...

Embodiment 2

[0044] Embodiment 2: Preparation of photocurable fiber resin composite material:

[0045] Raw materials: bisphenol A glycidyl methacrylate (Bis-GMA, chemically pure, Aldrich Company); triethylene glycol dimethacrylate (TEGDMA, chemically pure, Aldrich Company); catalyst camphorol (CQ, chemically pure Pure, Aldrich Company); initiator N,N-dimethylaminoethyl methacrylate (DMAEMA, Aldrich Company); PBO fiber (Zylon AS, Toyobo Company, Japan); silane coupling agent (Z-6040, Dow Corning, USA); acetone (analytical grade); deionized water; nano-TiO 2 (particle size 25nm, Sigma Company, USA); titanate coupling agent (Sigma Company, USA); ether diluent; tetra-n-butyl titanate; triethanolamine; absolute ethanol; self-made glass tube mold (specification: Length 100±1mm, diameter 2±0.02mm).

[0046] (1) Resin-based nano-toughening

[0047] A. Nano-TiO 2 Pretreatment: take nano TiO 2 0.5% to 1.0% titanate coupling agent of the mass of the pellets, use 2 to 5 times the ether diluent, a...

Embodiment 3

[0056] Example 3: Flexural performance test of four different fiber piles:

[0057] Materials: ParaPost Taper Lux (Conte, Switzerland), Rebilda Post (VOCO, Germany), self-made PBO light-cured fiber post and self-made PBO heat-cured fiber post, the selected model is Ф1.5mm.

[0058] (1) For each group of 10 samples, use an electronic digital caliper to measure the diameter at the midpoint of the length of each group of samples, and calculate the average value of the diameter of each group of fiber piles.

[0059] (2) According to the IS04597-2 standard, conduct a three-point bending strength test to test its flexural strength (MPa) and elastic modulus (GPa). Keep the indoor temperature (22±1)℃, humidity (50±10)%, the span between fulcrums is 10mm, the loading position is the diameter test point, the loading direction is perpendicular to the long axis of the fiber pile, the loading speed is 1.0mm / min, and the uniform acceleration Press until the sample is broken. Record the ma...

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Abstract

The invention relates to a poly(p-phenylene benzobisoxazole) (PBO) fiber reinforced composite material for a dental root canal post and a preparation method thereof. The fiber reinforced composite material for the dental root canal post comprises a surface modified PBO reinforced fiber which is used as a reinforcing phase and a nanometer modified toughening resin which is used as a matrix. The composite material is compounded by mixing the PBO reinforced fiber with the toughening resin, wherein the PBO reinforced fiber adopts a 3D braided structure. According to the invention, a breakthrough is made to the design of unidirectional reinforcement with single-phase fibers in conventional fiber post structures, the high-performance PBO fiber and the 3D braided structure are introduced into a dental post material, so the flexural behavior of a conventional fiber post is improved, and good interfacial bonding force between the high-performance fiber and the resin matrix is guaranteed; and through adoption of the 3D braided structure, layering of the laminated composite material is effectively avoided, so excellent mechanical properties of the composite material in vertical, transverse and thickness directions are guaranteed.

Description

technical field [0001] The present invention relates to a composite material for dental root canal posts and a preparation method thereof, in particular to a poly-p-phenylenebenzobisoxazole (PBO) fiber-reinforced composite material for dental root canal posts and its preparation method. Background technique [0002] When clinically repairing teeth with large defects, it is often difficult to obtain sufficient retention force with simple inlays or full crowns. Root canal posts must be used to assist crown retention in order to obtain ideal restoration results. At present, there are many materials that can be used for dental root canal posts, but they all have shortcomings: traditional metal alloy posts have poor aesthetics, are prone to corrosion and sensitization, and high elastic modulus can easily cause tooth root fracture; ceramic posts have good aesthetics and biological characteristics. Capacitance, but its elastic modulus is still much higher than that of dentin; the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/087D06M10/00D06M13/50D06M11/46D06M101/30A61K6/891
Inventor 胡琛周新贵杨会永邵龙泉刘琦王琳琳
Owner NANFANG HOSPITAL OF SOUTHERN MEDICAL UNIV
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