Temporary Root Canal Sealer Dispersion with Lewis Basic Polymers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional temporary root canal sealers exhibit poor radio-opacity, storage stability, and resistance against bacterial growth, and are insufficient as sterilants and visualizing agents for root canal therapy.
Innovation Solution
A temporary root canal sealer dispersion with a pH of at least 9, comprising an aqueous dispersion medium with an oligomer or polymer having Lewis basic groups and a radio-opaque filler, where the weight ratio of oligomer/polymer to hydroxide is at least 0.5, ensuring improved radio-opacity and stability, and optionally including antiseptics and humectants for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional temporary root canal sealers use an aqueous mixture of calcium hydroxide and radio-opaque filler, then the sealer provides basic disinfection properties, but the mixture becomes heterogenous over time resulting in poor storage stability
Solution Approach 1:
The patent changes the chemical parameters of the dispersion medium by introducing oligomers and/or polymers with Lewis basic groups (such as polyethyleneimine, polypropyleneimine, or polybutyleneimine) to replace or supplement calcium hydroxide. This parameter change maintains the necessary pH level while preventing heterogeneity and improving storage stability of the radio-opaque filler suspension.
Solution Approach 2:
The patent creates a composite dispersion system combining radio-opaque fillers (barium sulfate, bismuth oxychloride, or calcium tungstate) with oligomers and/or polymers having Lewis basic groups in an aqueous medium. This composite material approach ensures both storage stability and radiopacity while maintaining homogeneous mixture characteristics over time.
2Reliability
If conventional temporary root canal sealers use standard radio-opaque fillers, then the sealer provides some radiopacity, but the radio-opacity is relatively poor and insufficient for effective visualization
Solution Approach 1:
The patent optimizes the concentration parameters of radio-opaque fillers (barium sulfate, bismuth oxychloride, or calcium tungstate) in the dispersion medium to achieve enhanced radiopacity. By adjusting the filler concentration within optimized ranges and combining multiple filler types, the sealer achieves superior X-ray contrast for effective root canal visualization without compromising other properties.
3Reliability
If conventional temporary root canal sealers use simple aqueous formulations, then the sealer is easy to prepare, but the resistance against bacterial growth and sterilant effectiveness is insufficient
Solution Approach 1:
The patent formulates a composite antibacterial system combining oligomers and/or polymers with Lewis basic groups (inherently antibacterial), hydroxides of alkali/alkaline earth metals (maintaining high pH), and optionally additional antibacterial agents. This multi-component composite approach provides synergistic antibacterial and sterilant effects while maintaining manageable formulation complexity.
4Reliability
If conventional temporary root canal sealers use high concentrations of radio-opaque filler to improve radio-opacity, then the radiopacity increases, but the mixture becomes heterogenous and storage stability deteriorates
Solution Approach 1:
The patent introduces oligomers and/or polymers with Lewis basic groups as intermediary substances that act as dispersing agents and stabilizers. These intermediaries prevent aggregation of radio-opaque filler particles even at high concentrations, maintaining homogeneous mixture characteristics while achieving the desired radiopacity levels for effective root canal visualization.
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 solution provides a temporary root canal sealer with superior radio-opacity, stability, and antibacterial properties, effectively sealing and sterilizing root canal cavities while maintaining consistency and ease of application, outperforming commercially available sealers in radio-opacity and sealing capacity.
Implementation Method 1
an aqueous dispersion medium comprising an oligomer and/or polymer having Lewis basic groups
Implementation Method 2
oligomer and/or polymer having Lewis basic groups
Implementation Method 3
a pH of at least 9 and comprising: (i) an aqueous dispersion medium comprising an oligomer and/or polymer having Lewis basic groups, and optionally a hydroxide of an alkali metal and/or a hydroxide of an alkaline earth metal
Implementation Method 4
hydroxide of an alkali metal and/or a hydroxide of an alkaline earth metal
Implementation Method 5
a dispersed phase comprising a radio-opaque filler
Implementation Method 6
obtain information about the internal environment of pulp chamber and/or associated root canals
Data Source
AI summary
A temporary root canal sealer dispersion having a pH of at least 9 and comprising: (i) an aqueous dispersion medium comprising an oligomer and/or polymer having Lewis basic groups, and optionally a hydroxide of an alkali metal and/or a hydroxide of an alkaline earth metal, and (ii) a dispersed phase comprising a radio-opaque filler, wherein the weight ratio of oligomer and/or polymer having Lewis basic groups to hydroxide of an alkali metal and/or hydroxide of an alkaline earth metal is at least 0.5 when said aqueous dispersion medium comprises a hydroxide of an alkali metal and/or a hydroxide of an alkaline earth metal.