Two-Component Adhesive for Artificial Teeth Bonding
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Solution Overview
Problem
Existing adhesives for bonding artificial teeth to denture bases require additional primer pretreatment, which is inefficient in modern mechanical production processes, leading to potential adhesive failures under critical loads.
Innovation Solution
A two-component adhesive mixture comprising methyl methacrylate, a copolymer of methyl methacrylate, polyfunctional (meth)acrylates, and a peroxide-based initiator, mixed with a tertiary amine, eliminating the need for primer pretreatment and ensuring strong, permanent bonds between poly(meth)acrylate or its copolymer artificial teeth and denture bases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If primer pretreatment is used to improve adhesive bond strength, then bonding strength is improved, but production complexity and time increase
Solution Approach 1:
The patent combines the primer functionality and adhesive functionality into a single two-component adhesive system. Component A contains the polyfunctional (meth)acrylate monomer mixture that provides both surface penetration and bonding, while component B contains the peroxide initiator. This eliminates the separate primer application step while maintaining strong adhesive bonds between denture base and artificial teeth.
Solution Approach 2:
The two-component adhesive system performs multiple functions: component A's polyfunctional (meth)acrylate monomers provide surface penetration and adhesive bonding, while also serving as the reactive adhesive matrix. Component B's peroxide initiator triggers polymerization. This multi-functional system replaces the traditional primer-plus-adhesive two-step process with a single application step.
2Reliability
If primer pretreatment is applied to achieve strong bonds, then adhesive reliability is improved, but production time increases
Solution Approach 1:
The adhesive components are prepared in advance with all necessary functional groups pre-configured. Component A contains polyfunctional (meth)acrylate monomers that are ready to penetrate and bond to surfaces upon contact, eliminating the need for separate primer application. The peroxide initiator in component B is pre-positioned to trigger immediate polymerization upon mixing, enabling rapid curing without extending production time.
Solution Approach 2:
The two-component system enables continuous bonding action from application to curing. Upon mixing components A and B, the peroxide-initiated polymerization immediately begins, creating a continuous reactive process that bonds the denture base to artificial teeth in a single uninterrupted step, eliminating idle time between primer drying and adhesive application.
3Device complexity
If traditional adhesive systems are used without polyfunctional monomers, then formulation simplicity is maintained, but bond strength under critical load decreases
Solution Approach 1:
The adhesive system uses a composite monomer formulation containing polyfunctional (meth)acrylate monomers (such as TEGDMA, Bis-GMA, or UDMA) combined with methyl methacrylate. The polyfunctional monomers create crosslinked polymer networks that significantly enhance bond strength and durability under critical loads, while the methyl methacrylate provides good wetting and penetration. This composite approach optimizes both strength and handling properties.
Solution Approach 2:
The adhesive formulation uses different monomers with specific local functions: polyfunctional (meth)acrylate monomers provide crosslinking density and strength in the bond interface, while monomeric methyl methacrylate provides low viscosity for surface penetration. This localized functional distribution within the adhesive mixture achieves optimal bonding performance without overall formulation complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The adhesive mixture achieves cohesive fracture surfaces in both teeth and denture bases during tests, indicating strong and reliable bonding without primer pretreatment, preventing adhesive failure under critical loads.
Implementation Method 1
a peroxide-based free-radical initiator, wherein said copolymer of methyl methacrylate is present in an amount of 30-50 parts by weight dissolved in a solution of 65-85 parts by weight of monomeric methyl methacrylate and 3-15 parts by weight of the polyfunctional (meth)acrylate
Implementation Method 2
a peroxide-based free-radical initiator, especially dibenzoyl peroxide
Implementation Method 3
said at least one second component B comprises methyl methacrylate and a tertiary amine
Implementation Method 4
The adhesive mixture achieves cohesive fracture surfaces in both teeth and denture bases during tests, indicating strong and reliable bonding without primer pretreatment, preventing adhesive failure under critical loads
Data Source
Figure 1~6
AI summary
A mixture containing at least one first component A and at least one second component B, characterized in that said at least one first component A comprises a methyl methacrylate, a copolymer of methyl methacrylate dissolved in excess methyl methacrylate, optionally comprising, additionally dissolved therein, atleast one polyfunctional (meth)acrylate, especially ethylene glycol dimethacrylate, butanediol dimethacrylate, hexanediol dimethacrylate, triethylene glycol dimethacrylate (TEGDMA), tetraethylene glycol dimethacrylate, diurethane dimeth- acrylate, bis(hydroxymethacryloyloxypropoxy)phenylpropane (bis-GMA), polyethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, ditrimethylol- propane tetraacrylate;and a peroxide-based free-radical initiator, wherein said copolymer of methyl methacrylate is present in an amount of 30-50 parts by weight dissolved in a solution of 65-85 parts by weight of monomeric methyl methacrylate and 3-15 parts by weight of the polyfunctional (meth)acrylate, especially the triethylene glycol dimethacrylate (TEGDMA), mixed with a solution of 0.5 to 3 parts by weight of said peroxide-based free-radical initiator, especially dibenzoyl peroxide, in 70-90 parts by weight of monomeric methyl methacrylate, and said at least one second component B comprises methyl methacrylate and a tertiary amine.