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Dental composite material, multilayer dental composite material and preparation method and application thereof

A technology of composite materials and dental materials, applied in dental preparations, dentistry, dental prostheses, etc., can solve the problem of not being able to effectively improve the strength and toughness of composite materials, reduce the interface strength between fillers and matrix, increase the overall density of dental composite materials, etc. problems, to achieve the effects of inhibiting crack growth, enhancing mechanical properties, and long fatigue life

Pending Publication Date: 2022-05-06
香港城市大学深圳研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in dental composites, the mechanical properties of the polymer matrix itself are very low, and it is necessary to add a high content of fillers to improve its toughness, strength and modulus. Although high content of fillers can improve the overall modulus of dental composites , but it is difficult to disperse, and the agglomerated fillers become the birthplace of initial defects in the composite material, reducing the interface strength between the filler and the matrix, resulting in the inability to effectively improve the overall strength and toughness of the composite material
Also, fillers are often several times denser than the polymer matrix, and high filler levels can significantly increase the overall density of a dental composite, reducing its lightness and comfort
After years of use and development, it is still impossible to find a dental composite material that can not only improve the mechanical properties of dental composite materials, but also maintain its lightness and comfort in the current dental products

Method used

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  • Dental composite material, multilayer dental composite material and preparation method and application thereof
  • Dental composite material, multilayer dental composite material and preparation method and application thereof
  • Dental composite material, multilayer dental composite material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0069] This embodiment provides a method for preparing a nanocomposite material, which specifically includes the following steps:

[0070] (1) Mix bisphenol A glycerol dimethacrylate (BisGMA, yellow liquid) and triethylene glycol dimethacrylate (TEGDMA, colorless liquid) at a mass ratio of 1:1, and then add camphor Quinone (orange powder) and 2-(dimethylamino) ethyl methacrylate (colorless liquid), stirring reaction until the mixture becomes translucent dark yellow liquid, promptly obtains the dental polymer precursor; Wherein, camphorquinone The added amount accounts for 2 mol% of the total molar weight of the dental polymer precursor; 2-(dimethylamino) ethyl methacrylate accounts for 2 mol% of the total molar weight of the dental polymer precursor.

[0071] (2) Pretreatment of zirconia nanoparticles: adding zirconia nanoparticles to ethanol solution, using a high-speed disperser and an ultrasonic probe for dispersion treatment, followed by ultrasonic washing and centrifugal ...

Embodiment 2

[0075] This embodiment provides a method for preparing a multilayer dental composite material, comprising the following steps:

[0076] (1) if figure 2As shown, the size will be 76.2×25.4×1mm 3 The glass plate is placed horizontally on a plane, and two pieces of size 32×24×0.2mm are adhered to the upper surface of the glass plate through an adhesive spacer. 3 The glass sheet, leaving 28.2×25.4×0.2mm between the two glass sheets 3 Clearance( figure 2 in (a)).

[0077] (2) drop the zirconia nanoparticle-filled dental polymer precursor ( figure 2 In (b)); then adopt a transparent plastic sheet to cover the gap, and the lower surfaces of the two ends of the transparent plastic sheet are respectively abutted against the upper surfaces of the two glass sheets ( figure 2 In (c)); Place a 25N weight on the upper surface of the transparent plastic sheet ( figure 2 (d)), extruding the zirconia nanoparticle-filled dental polymer precursor in the gap until the zirconia nanopart...

Embodiment 3

[0080] This embodiment constructs and obtains three kinds of independent dental composite materials according to the method of embodiment 1 and 2, as image 3 shown.

[0081] The first, gradient multilayer dental composite (GMDC):

[0082] Such as image 3 As shown in (a), the content of zirconia nanoparticles in the dental composite material of each layer shows a gradient linear change along the thickness direction, the content is from 0vol% to 21.40vol%, and the increment of each layer is 2.378vol%, a total of 10 layer structure.

[0083] The second, Alternating Multilayer Dental Composite (AMDC):

[0084] Such as image 3 As shown in (b), 5 layers of pure resin materials (i.e. no zirconia nanoparticles added in Example 1) and 5 layers of zirconia nanoparticles added in an amount of 21.40vol% dental composites are arranged alternately along the thickness direction .

[0085] The third type, monotonic multilayer dental composite (MMDC):

[0086] Such as image 3 As sh...

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Abstract

The invention provides a dental composite material, a multi-layer dental composite material and a preparation method and application thereof. The preparation method of the dental composite material comprises the steps of mixing, stirring, shearing and grinding, vacuum defoaming and curing. The multi-layer dental composite material is of a two-layer structure and comprises at least one layer of dental composite material and / or at least one layer of dental polymer. The composite material can be layered and independent, and has adjustability in structural and mechanical properties, higher fracture resistance, higher elastic modulus and longer fatigue life; the characteristics of portability, attractiveness, good biocompatibility and the like of the existing dental composite material are maintained while the mechanical property is enhanced. The preparation method comprises the steps of stacking, dripping, calendering and curing. The preparation method is simple to operate and low in cost, and gradient type, alternating type and monotonous type multilayer dental composite materials can be prepared and obtained and are respectively applied to repairing molars and / or premolars, incisor teeth and / or canine teeth and caries in different positions.

Description

technical field [0001] The invention belongs to the technical field of dental restoration materials, and relates to a dental composite material, a multilayer dental composite material and a preparation method and application thereof. Background technique [0002] Dental health plays an important role in people's general health and quality of daily life. Existing studies have proved that dental disease can cause various diseases such as heart disease, cardiovascular and cerebrovascular diseases, diabetes and respiratory diseases. The most common dental disease is dental caries. According to the World Health Organization (WHO) survey in 2012, 60% to 90% of school-age children and almost 100% of adults in the world have dental caries, and this proportion may be even higher in poor and backward areas. Restoration with dental restorative materials is the most important method for the treatment of dental caries. [0003] The use of dental materials can be traced back to 5,500 y...

Claims

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Application Information

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IPC IPC(8): A61K6/62A61K6/71A61K6/818A61K6/15
CPCA61K6/62A61K6/71A61K6/818A61K6/15
Inventor 牛鑫瑞纪唤云
Owner 香港城市大学深圳研究院
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