Adhesive Bonding for Artificial Plastic Teeth
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Solution Overview
Problem
The durability and longevity of the bond between synthetic polymer denture teeth and acrylic denture base resins are compromised due to limitations in existing adhesives, including unsuitability for pour and light-curable resins and shelf-stability issues caused by residual benzoyl peroxide initiator.
Innovation Solution
A method employing adhesion promoter monomers, dimers, or oligomers with a solvent like methyl acetate, where the plastic teeth are warmed to soften, allowing reactive components to infiltrate and form a secure bond through addition-type polymerization across the interface between the teeth and denture base resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing adhesives are used to bond synthetic polymer denture teeth to acrylic denture base resins, then bonding is achieved, but the bond durability and longevity are compromised due to gelation from residual benzoyl peroxide initiator
Solution Approach 1:
The patent removes the harmful benzoyl peroxide initiator from the adhesive formulation, extracting the cause of gelation and shelf-stability problems while maintaining bonding capability through alternative initiation mechanisms that do not compromise long-term durability
Solution Approach 2:
The patent changes the chemical composition parameters of the adhesive by replacing traditional benzoyl peroxide initiators with alternative initiation systems, thereby modifying the shelf-stability and long-term bonding characteristics to eliminate gelation issues
2Adaptability or versatility
If conventional adhesives are used, then bonding is achieved, but they are not suitable for use with both pour and light-curable denture base resins
Solution Approach 1:
The patent formulates an adhesive that performs multiple functions: it bonds effectively to both pour and light-curable denture base resins, making it universally applicable to different resin types while maintaining reliable bonding effectiveness across all compatibility scenarios
3Ease of operation
If the plastic tooth is exposed to adhesive at room temperature, then the adhesive can be applied, but the adhesion promoter chains cannot effectively infiltrate the plastic tooth matrix
Solution Approach 1:
The patent changes the temperature parameter during adhesive application by warming the plastic tooth to elevated temperatures (e.g., 37°C or higher), which enhances the kinetic energy and diffusion rate of adhesion promoter chains, enabling effective infiltration into the plastic tooth matrix while maintaining ease of operation
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 method achieves a strong and long-lived bond, demonstrated by bond strength tests showing 2-3 times higher strength compared to existing Trubyte Denture Bond, with improved longevity and resistance to thermocycling and masticatory fatigue.
Implementation Method 1
The adhesion promoter chains infiltrate the plastic tooth matrix
Implementation Method 2
exposing a plastic tooth to the adhesive while warming the tooth and allowing the plastic to soften
Implementation Method 3
These reactive entities, once initiated, undergo addition type polymerization across the interface between the teeth and the denture base resin to yield a strong and long-lived bond
Data Source
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AI summary
The present invention is directed toward an adhesive for and a method for bonding artificial plastic teeth to a denture base. The adhesive employs a number of adhesion promoter monomers, dimers or oligomers and a cure package, as well as methyl acetate as a solvent. The method according to the invention includes exposing a plastic tooth to the adhesive and allowing the plastic to soften (not dissolve). The adhesion promoter chains infiltrate the plastic tooth matrix, such that upon curing a secure bond is formed.