Dental Surface Coating Composition for LED Curing and Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional photopolymerizable dental surface coating compositions face issues with surface curability, adhesive property, and storage stability, particularly when using LED light-curing units, leading to peeling, chipping, and insufficient glossiness, especially when applied to glass ionomer cement and tooth substance.
Innovation Solution
A dental surface coating composition comprising polyfunctional polymerizable monomer, volatile monofunctional polymerizable monomer, acidic group-containing polymerizable monomer, α-diketone compound, aromatic tertiary amine, and aliphatic tertiary amine, with specific ratios, enhances surface curability, adhesive property, and storage stability, forming a glossy resin coating layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a photopolymerizable dental surface coating composition containing conventional photopolymerization initiators is used, then the composition can be applied to resin-based restorations, but it lacks adhesive property to glass ionomer cement and tooth substance, causing peeling and chipping
Solution Approach 1:
The patent changes the chemical parameters of the coating composition by incorporating acidic group-containing polymerizable monomers (such as phosphoric acid ester groups) that can chemically bond to glass ionomer cement and tooth substance. This chemical modification enables the coating to adhere to diverse restoration materials including glass ionomer, composite resin, and natural tooth structure, eliminating peeling and chipping issues.
2Productivity
If LED light-curing units are used for surface coating, then treatment time is reduced, but surface curability is insufficient and unpolymerized monomer remains on the surface
Solution Approach 1:
The patent modifies the photopolymerization system by selecting initiators and monomers with absorption spectra optimized for LED wavelengths (typically 405-480 nm). This parameter adjustment ensures complete polymerization under LED curing, eliminating the persistence of unpolymerized monomer while maintaining rapid curing speed.
3Loss of time
If photopolymerizable coating material is applied to achieve glossy surface, then time-consuming multi-step polishing is eliminated, but the coating lacks sufficient adhesive property and peels off in short time
Solution Approach 1:
The patent creates a composite coating material that combines photopolymerizable monomers with acidic functional groups capable of bonding to both the restoration surface and the coating matrix. This composite structure provides simultaneous adhesion to glass ionomer/tooth substance and resistance to peeling, while maintaining the time-efficient single-step application process.
4Ease of operation
If conventional photopolymerizable coating composition is used, then application is simple, but storage stability is poor and gelation occurs during storage
Solution Approach 1:
The patent adjusts the chemical composition parameters by selecting monomers and initiators with appropriate reactivity ratios and stability characteristics. This optimization allows the coating to remain stable during storage without premature polymerization or gelation, while still enabling simple application and curing when needed.
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 composition achieves excellent surface curability and adhesive property to various restorations, reducing peeling and chipping, while maintaining properties over time, regardless of the light-curing unit type.
Implementation Method 1
irradiating with a light to form a thin resin coating layer
Data Source
AI summary
To provide a photopolymerizable type dental surface coating material composition which may finish the applied part lubriciously in a short time by exhibiting excellent surface curability regardless of the type of light irradiator, may protect the restoration from abrasion and stain for a long time by exhibiting excellent adhesive property to various restorations including the dental glass ionomer cement for filling and the tooth substance, and may have excellent storage stability that can maintain properties and characteristics for a long time. The photopolymerizable type dental surface coating composition of the present disclosure comprises(a) polyfunctional polymerizable monomer,(b) volatile monofunctional polymerizable monomer,(c) acidic group-containing polymerizable monomer,(d) α-diketone compound,(e-1) aromatic tertiary amine as (e) amine compound, and(e-2) aliphatic tertiary amine as (e) amine compound, whereinthe compounding ratio of the (e-1) and the (e-2) is within a range of 1.0:99.0 to 70.0:30.0 in terms of mass ratio.