Preparation method of root canal filling material

A root canal filling and inorganic filler technology, which is applied in dental preparations, pharmaceutical formulations, medical science, etc., can solve the problems of poor stability and insufficient adhesion of Resilon resin filling materials, and achieve excellent stability and excellent adhesion. The effect of improving junction performance, stability and cohesion

Inactive Publication Date: 2009-04-29
HOSPITAL OF STOMATOLOGY SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to overcome the above-mentioned shortcoming existing in the prior art, provide a kind of preparation method of root canal filling material, the root canal filling material prepared by the present invention both overcomes gutta-perch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Styrene-isoprene-styrene block copolymer 40 parts

[0040] Ethylene-vinyl acetate copolymer 10 parts

[0041] γ-methacryloxypropyltrimethoxysilane modified fumed silica 20 parts

[0042] 10 parts of methacrylic acid modified zinc oxide

[0043] Acrylic modified tricalcium phosphate 10 parts

[0044]Undecylenic acid modified barium sulfate 10 parts

[0045] Prepare reaction mixture by above proportioning, above all are parts by weight,

[0046] After the reaction mixture was fully mixed uniformly with a kneader, it was kneaded for 30 minutes in a two-roller plastic mixer in a molten state at 140° C. to obtain a root canal filling material. According to relevant standards, its Shore A hardness is 82, its tensile strength is 2.85MPa, and its elongation at break is 345%. After soaking in artificial saliva with a pH of 7.0 and 9.5 for 30 days, its mass gain is 0.06% and 0.32%. Using Epiphany as a sealant to fill the isolated teeth, the measured bond strength was 2.68MPa...

Embodiment 2

[0048] Styrene-ethylene-butadiene-styrene copolymer grafted methyl methacrylate 20 parts

[0049] γ-methacryloxypropyltrimethoxysilane modified bioglass 10 parts

[0050] Stearic acid modified zinc oxide 20 parts

[0051] Undecylenic acid modified barium sulfate 50 parts

[0052] Prepare reaction mixture by above proportioning, above all are parts by weight,

[0053] The reaction mixture was first kneaded in an internal mixer at 250°C for 5 minutes to fully mix the components uniformly, and then extruded in a twin-screw extruder in a molten state at 250°C to obtain a root canal filling material. According to relevant standards, its Shore A hardness is 90, its tensile strength is 1.77MPa, its elongation at break is 225%, and its mass gain is 0.19% and 0.52% after soaking in artificial saliva with a pH of 7.0 and 9.5 for 30 days, Using Epiphany as a sealant to fill the isolated teeth, the measured bonding strength was 1.91MPa, and the glucose microleakage was 4.06mM / L on the ...

Embodiment 3

[0055] Styrene-butadiene-styrene copolymer 32 parts

[0056] Ethylene-butyl acetate copolymer 8 parts

[0057] γ-methacryloxypropyltrimethoxysilane modified fumed silica 15 parts

[0058] Barium sulfate 45 parts

[0059] Prepare reaction mixture by above proportioning, above all are parts by weight,

[0060] The reaction mixture was kneaded in an internal mixer at 250°C for 5 minutes to fully mix the components, and then kneaded in a twin-roller plastic mixer at 170°C for 15 minutes to obtain a root canal filling material. According to relevant standards, its Shore A hardness is 88, its tensile strength is 2.40MPa, its elongation at break is 241%, and its mass gain is 0.05% and 0.45% after soaking in artificial saliva with a pH of 7.0 and 9.5 for 30 days, Using Epiphany as a sealant to fill the isolated teeth, the measured bonding strength was 2.86MPa, and the glucose microleakage was 3.76mM / L on the 30th day; while the gutta-percha root canal filling material and Resilon ...

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Abstract

The invention discloses a preparation method of root canal filling materials, which comprises the steps that: (1) the mixture composed of thermoplastic copolymerization-modified polymer or/and grafted modified polymer and inorganic filler treated with surface modification as well as compounds which have resisting function to X-ray is evenly blended by adopting a kneader; and (2) the mixture is mixed for 5 minutes to 40 minutes in melting state with the temperature of 140 DEG C to 250 DEG C, then the root canal filling materials of the invention are prepared; the root canal filling materials prepared by the method has the advantage of not only excellent stability of gutta-percha filling materials, but also excellent cohesiveness of Resilon resin filling materials; the defects of poor adhesive bonding performance of the gutta-percha filling materials and easy degradation of the Resilon resin filling materials which are used in current clinics can be overcome; and compared with the gutta-percha filling materials and the Resilon resin filling materials, the stability and the cohesiveness are greatly improved.

Description

technical field [0001] The invention relates to the field of oral material science, in particular to a method for preparing a root canal treatment filling material. technical background [0002] Root canal therapy is a treatment method to prevent the occurrence of periapical lesions or promote the healing of periapical lesions. One of the key steps is to seal the root canal three-dimensional system tightly through root canal filling and prevent reinfection to achieve the purpose of treatment. . [0003] There are many types of filling materials used in root canal therapy, including silver tips, cobalt-chromium-molybdenum alloy tips, titanium-nickel alloy tips, gutta-percha and gutta-percha tips, resin modified gutta-percha tips, Resilon resin glue, etc. The effect largely depends on the performance of the root canal filling material. The advantages and disadvantages of various existing root canal filling materials are as follows: [0004] 1 Solid metal filling materials ...

Claims

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Application Information

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IPC IPC(8): A61K6/00
Inventor 凌均棨林正梅刘芳胡敭罗远芳贾德民
Owner HOSPITAL OF STOMATOLOGY SUN YAT SEN UNIV
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