Dental restoration thread fiber pole

A dental restoration and fiber technology, applied in dentistry, medical science, dental preparations, etc., can solve the problems of large differences in mechanical properties, restoration failure, low strength, etc., achieve excellent mechanical properties, increase adhesion, and increase adhesion area effect

Active Publication Date: 2010-01-06
北京欧亚瑞康新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the following three problems are likely to occur when using the existing dental post and light-cured resin core: (1) the restoration failure caused by debonding of the post and core in clinical application occurs, and the chemical interface bonding force between the post and the core is relatively small , when the stress is transferred, stress concentration is likely to cause delamination or debonding between the pile and the core, resulting in repair failure
(2) The core made of composite light-curing resin is applied to the high-strength composite material post. Due to the large difference in mechanical properties, it only depends on the strength of the chemical interface between the resin matrix of the fiber-reinforced composite material and the light-curing pile-shaped resin. Lower, increasing the possibility of nuclear damage due to external force
(3) In addition, in clinical application, the bonding strength of the chemical interface between the fiber post and the dentin formed by the light-cured adhesive between the straight fiber post and the dentin is low, and it will also occur. The possibility of repair failure such as debonding, displacement or even pulling out

Method used

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Examples

Experimental program
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Embodiment 1

[0023] Pultrusion sample preparation of fiber-reinforced resin-based composite body: the basic formula of matrix resin is: American Dow Der331 epoxy resin: 100 parts, curing agent: methyltetrahydrophthalic anhydride (80 parts), accelerator: DMP- 30 (1 part), release agent: 1.5 parts, reinforcing fiber: HS4 from Nanjing Glass Fiber Research and Design Institute, fiber tensile strength is 4600MPa, elastic modulus is 86.4GPa, density is 2.53g / cm 3 , The elongation at break was 5.3%.

[0024] The green body is prepared by pultrusion process in a circular mold with a diameter of 4mm. The pultrusion process adopts a three-stage heating method, the temperature of the first stage: 140 degrees, the temperature of the second stage: 165 degrees, and the temperature of the third stage: 185 degrees. The stretch-extruded strip was post-cured in an oven at 200°C for 2 hours to obtain the fiber-reinforced composite body of the embodiment. The volume fraction of fibers is 62%, the tensile st...

Embodiment 2

[0032] The basic formula system is: photocurable resin monomer bisphenol A glycidyl methacrylate (Bis-GMA), diluent triethylene glycol dimethacrylate (TEGDMA), catalyst camphorone (CQ) and co-initiator Reagent N,N-dimethylaminoethyl methacrylate (DMAEMA) was purchased from Aldrich Company. High-strength glass fiber, HS4, fiber tensile strength of 4600MPa, elastic modulus of 86.4GPa, density of 2.53g / cm3, elongation at break of 5.3%, produced by Nanjing Glass Fiber Research Institute.

[0033] On-site light-curing molding green body of light-curing prepreg: Weigh 49.5g Bis-GMA and TEGDMA respectively and put them in a 250ml three-neck flask, stir at high speed for 6h to mix evenly, then add 0.5g each of CQ and DMAEMA to the resin system, and then Stir for 1 h to obtain a photocurable resin system. Put the photocurable resin in a 30cm-long dipping tank, pass the continuous glass fiber through the dipping tank at a speed of 0.5m / min, and then scrape off the excess resin through ...

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Abstract

The invention relates to a dental restoration thread fiber pole which is characterized by comprising a head part, a middle section and a tail part, wherein the head part is provided with an oblique spiral groove, the tail part is a cone-shaped part, the shape and the size of the tail part are consistent with the shape and the size of a cone-shaped part of a dental drill bit, the cone-shaped part of the middle section near the tail part is provided with a groove, and a smooth straight section is arranged between the groove and the oblique spiral groove of the head part. A dental restoration thread pole core is an integer and is formed once, and physical locking force of the dental restoration thread pole core and a light-cured resin core is increased by the designed oblique spiral groove so as to increase interface strength. The dental restoration thread fiber pole reduces restoration failure caused by debonding the pole core in clinical application, but also has better transfer stress with the core, thereby avoiding the dental post break caused by stress concentration. The dental restoration thread fiber pole can be finely processed by a machine tool, has simple method, small errors and high consistency and can be produced in a large scale.

Description

technical field [0001] The invention relates to a threaded pile for dental restoration, in particular to a threaded pile processed and formed by fiber reinforced composite materials. Background technique [0002] With the continuous development of modern root canal treatment technology and the continuous improvement of dental materials, a large number of teeth with severe tooth defects have been preserved. Post-core restoration technology is an important means to preserve the affected teeth and restore their functions. The post-core is a prosthesis used to improve the resistance and retention of the affected tooth. It consists of two parts, the post and the core. The post is cemented in the root canal to achieve retention, and the core restores the shape of the defective tooth, providing further support for the affected tooth. Create conditions for artificial crown restoration or as an abutment for denture restoration. [0003] The core post repair technology of tooth defec...

Claims

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Application Information

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IPC IPC(8): A61C13/30A61K6/08A61K6/884
Inventor 杨小平邓旭亮
Owner 北京欧亚瑞康新材料科技有限公司
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