Dental Composite Heating via Photon Energy for Shrinkage Stress Reduction
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Solution Overview
Problem
Dental composite resins face challenges such as poor wear resistance, microleakage, and polymerization shrinkage, leading to restoration failures due to their physical and mechanical limitations, as well as difficulties in adapting to complex tooth geometries and achieving adequate bonding and sealing.
Innovation Solution
Applying photon energy to dental composites and materials to heat them above ambient temperature, improving handling characteristics and flowability, reducing shrinkage stress, and enhancing post-cure microhardness, while allowing for more efficient delivery and adaptation to tooth surfaces without compromising the material's properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If dental composite resins are used to restore dentition, then aesthetic appearance is improved, but wear resistance and mechanical durability deteriorate
Solution Approach 1:
The patent applies heating to change the physical state and properties of the composite resin, transforming it from a soft, pliable state to a hardened, wear-resistant state through thermal energy application, thereby resolving the contradiction between aesthetic appearance and wear resistance
Solution Approach 2:
The invention uses composite materials containing photopolymerizable monomers, inorganic fillers, and photoinitiators that respond to light energy, creating a material system that combines aesthetic properties with enhanced mechanical strength through photochemical polymerization
2Quantity of substance
If composite resin is placed in thick increments, then filling volume is increased, but polymerization completeness deteriorates
Solution Approach 1:
The patent applies heating to the composite resin before placement to pre-polymerize the monomers and initiate cross-linking reactions, so that when the resin is placed in thick increments, the polymerization process is already underway and can complete throughout the entire thickness, ensuring complete polymerization even in thick restorations
Solution Approach 2:
The invention maintains continuous polymerization activity throughout the composite resin by using photopolymerizable components that continue reacting after placement, ensuring complete transformation from monomer to polymer even in thick increments, thereby eliminating the need to divide into multiple thin layers
3Ease of operation
If conventional heating methods are used, then material flowability is improved, but heating time and energy consumption increase
Solution Approach 1:
The patent replaces conventional thermal heating methods with photothermal heating using light energy, which directly excites the photoinitiators and generates heat through photochemical reactions, achieving rapid heating without the time-consuming conductive heating processes of traditional methods
Solution Approach 2:
The invention utilizes phase transition of water evaporation as a cooling mechanism during the heating process, where the evaporation of water from the composite resin provides endothermic cooling that controls the heating rate and prevents overheating, enabling precise temperature control during photothermal processing
4Reliability
If highly filled composites are used, then shrinkage stress is reduced, but workability and flowability deteriorate
Solution Approach 1:
The patent applies heating to change the viscosity and flow characteristics of highly filled composites, transforming them from a difficult-to-manipulate state to a workable state, allowing the material to be properly adapted to tooth surfaces while maintaining the benefits of high filler content and reduced shrinkage stress
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
This approach enhances the physical and mechanical properties of dental composites, improving their ability to conform to tooth surfaces, reducing restoration failures, and allowing for the use of highly filled composites with reduced shrinkage and increased durability, while maintaining the benefits of flowable composites.
Implementation Method 1
Applying photon energy to dental composites and materials to heat them above ambient temperature
Implementation Method 2
heating the dental composite material above ambient temperature using a device that applies photon energy
Implementation Method 3
a photopolymerization system, and pigments and colorants that match tooth colors and shades
Data Source
AI summary
The invention relates to the application of photon energy to energize dental materials to enhance their physical handling characteristics, efficacy, ability to be delivered, reactivity, polymerization, and/or post-cure mechanical properties, among other attributes.