Platinum Nanoparticles in Dental Compositions for Antibacterial and Aesthetic Stability
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Solution Overview
Problem
Existing dental compositions, such as bonding agents and cements, fail to exhibit long-lasting antibacterial activity after polymerization and curing, and often discolor in water or hydrogen sulfide, making them unsuitable for aesthetic restorative treatments.
Innovation Solution
A dental composition comprising uncoated platinum nanoparticles, supported on a core particle or used as a dispersion, with a specific particle size and concentration, combined with radical polymerizable monomers and a polymerization initiator, to provide sustained antibacterial activity and prevent discoloration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antibacterial compounds are mixed into dental bonding agents or cements, then antibacterial activity is improved, but long-lasting antibacterial activity after polymerization is insufficient
Solution Approach 1:
The patent changes the physical state and size of the antibacterial agent by using platinum nanoparticles instead of conventional antibacterial compounds. The nanoparticle form maintains antibacterial activity while providing sustained release over time, resolving the contradiction between immediate activity and long-lasting effect.
Solution Approach 2:
The patent creates a composite dental material combining platinum nanoparticles with bonding agents or cements. This composite structure provides both the adhesive properties of the dental material and the sustained antibacterial activity of the platinum nanoparticles, achieving long-lasting protection.
2Reliability
If silver particles are used in dental materials, then antibacterial activity is improved, but discoloration occurs in water or hydrogen sulfide
Solution Approach 1:
The patent replaces silver particles with platinum nanoparticles. While platinum is more expensive than silver, the nanoparticles are designed to be stable and non-reactive with water and hydrogen sulfide, preventing discoloration while maintaining antibacterial activity throughout the service life of the restoration.
Solution Approach 2:
The platinum nanoparticles create an inert, non-reactive environment within the dental material that resists chemical reactions with water and hydrogen sulfide in the oral cavity, preventing the discoloration problems associated with silver particles while maintaining antibacterial functionality.
3Reliability
If conventional antibacterial compositions are used, then initial antibacterial effect is achieved, but aesthetic quality deteriorates due to discoloration
Solution Approach 1:
The patent develops a composite material system where platinum nanoparticles are integrated into dental bonding agents, cements, or composite resins. This composite provides both the required antibacterial effect and maintains aesthetic quality by preventing discoloration, allowing the restoration to remain visually appealing over time.
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 effectively prevents bacterial penetration and maintains aesthetic quality by ensuring long-lasting antibacterial activity and reduced discoloration in water and hydrogen sulfide, making it suitable for aesthetic restorative treatments.
Implementation Method 1
platinum nanoparticles uncoated with a protective material such as polyacrylic acid, and that is for use in the treatment of a decayed tooth. Particularly, the present invention relates to a dental bonding agent, a dental cement, and a dental composite resin that kill or inhibit growth of caries-causing bacteria present on teeth
Implementation Method 2
the composition itself was found to possess antibacterial activity. The dental material of Patent Literature 2 was also found to have antibacterial activity. However, the dental material of this related art, as a cured product after polymerization and curing
Data Source
AI summary
The present invention provides a dental composition that exhibits excellent long-lasting antibacterial activity even as a cured product, and that excels in aesthetic quality with no discoloration occurring in water or in hydrogen sulfide. The present invention relates to a dental composition comprising a platinum nanoparticle (a) uncoated with a colloidal protective material.