Dental Material Bonding Denture Base and Teeth
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Solution Overview
Problem
Current dental materials for denture bases and replacement teeth have difficulty forming a strong bond due to differences in materials, require different processing methods, and face challenges in regulatory approval with complex compositions, limiting their suitability for additive manufacturing processes like 3D printing.
Innovation Solution
Radically polymerizable materials comprising monofunctional and polyfunctional (meth)acrylates, ABA triblock copolymers, nanoparticulate or microfine fillers, and photoinitiators, which improve fracture toughness and compatibility for both denture bases and replacement teeth, enabling processing through stereolithography and inkjet printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If different materials are used for denture base and replacement teeth, then mechanical requirements are met, but bonding strength deteriorates
Solution Approach 1:
The patent applies homogeneity by using the same base material composition (polymerizable monomers, block copolymers, fillers, and photoinitiators) for both denture base and replacement teeth, ensuring chemical and physical compatibility that facilitates strong bonding. The uniform material composition allows for consistent curing behavior and mechanical properties across different prosthesis components.
Solution Approach 2:
The patent employs composite materials by incorporating block copolymers with specific glass transition temperatures and nanoparticulate fillers into the polymerizable monomer matrix. This composite structure provides both the mechanical strength needed for replacement teeth and the bonding compatibility required for denture base integration, resolving the contradiction between different material requirements and bonding strength.
2Ease of manufacture
If different materials are used for denture base and replacement teeth, then mechanical properties are optimized, but processing complexity increases
Solution Approach 1:
The patent applies universality by developing a single material system that can be used for both denture base and replacement teeth, eliminating the need for separate processing methods for different components. The uniform composition of polymerizable monomers, block copolymers, and fillers allows both components to be processed using the same additive manufacturing parameters and curing protocols.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the glass transition temperatures of block copolymers and the composition ratios of polymerizable monomers to achieve different mechanical properties from the same base material system. This allows optimization for specific applications (denture base vs. replacement teeth) while maintaining processing compatibility through controlled material parameter variation rather than compositional divergence.
3Reliability
If complex material compositions are used, then mechanical properties are improved, but regulatory approval becomes more difficult
Solution Approach 1:
The patent applies local quality by incorporating nanoparticulate fillers with specific surface treatments and controlled particle size distributions into the polymerizable monomer matrix. These localized modifications at the nanoscale provide enhanced mechanical properties and biocompatibility without requiring complex bulk compositional changes, thereby simplifying regulatory approval while maintaining material performance.
Solution Approach 2:
The patent employs composite materials with carefully selected components (polymerizable monomers, block copolymers, nanoparticulate fillers, and photoinitiators) that achieve improved mechanical properties through synergistic effects. The composite structure allows for standardized composition reporting and simplified regulatory evaluation compared to complex multi-phase materials, while still delivering enhanced reliability through the combined functionality of its components.
4Strength
If uniform materials are used for denture base and replacement teeth, then bonding is simplified, but mechanical requirements cannot be differentiated
Solution Approach 1:
The patent applies local quality by incorporating nanoparticulate fillers with controlled particle sizes and surface treatments into the polymerizable monomer matrix. These localized modifications at the nanoscale provide enhanced mechanical properties and biocompatibility without requiring complex bulk compositional changes, thereby simplifying regulatory approval while maintaining material performance.
Solution Approach 2:
The patent utilizes parameter changes by adjusting the glass transition temperatures of block copolymers and the composition ratios of polymerizable monomers to achieve different mechanical properties from the same base material system. This allows optimization for specific applications (denture base vs. replacement teeth) while maintaining processing compatibility through controlled material parameter variation rather than compositional divergence.
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 materials provide enhanced fracture toughness, flexibility, and mechanical properties, allowing for a strong bond between denture bases and replacement teeth, facilitating additive manufacturing and meeting regulatory requirements with simplified compositions.
Implementation Method 1
radically polymerizable dental materials which are suitable for the preparation of the denture base and the replacement teeth of full or partial dental prostheses
Implementation Method 2
The block copolymers comprise hard segments of methacrylic acid esters and soft blocks of acrylic acid esters. The hard blocks are characterized by a high glass transition temperature and the soft blocks by a low glass transition temperature.
Data Source
AI summary
A radically polymerizable material for the preparation of dental prostheses, containing (a) at least one monofunctional radically polymerizable (meth)acrylate, (b) at least one polyfunctional radically polymerizable (meth)acrylate, (c) at least one ABA triblock copolymer, (d) at least one nanoparticulate or microfine filler having an average primary particle size of from 10 nm to 350 nm, and (e) at least one photoinitiator. The A block of the ABA triblock copolymer is an oligomeric polyester and the B block is an oligomeric polysiloxane.