Fast-Setting MTA Composition with Fluoride Release
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Solution Overview
Problem
Current mineral trioxide aggregate (MTA) materials for dental caries treatment and prevention have slow setting times, are prone to displacement, and may not effectively address bacterial infections in teeth and bone, with limitations in fluoride release and pH levels for optimal antibacterial effects.
Innovation Solution
A fast-setting MTA composition with a high aluminate cement powder, calcium oxide, silica, and fluorine additives, combined with a polyacid-based superplasticizer, to achieve rapid setting, high fluoride release, and sustained mechanical strength, suitable for caries treatment and prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional MTA materials are used, then antibacterial effects and caries prevention are achieved through high pH, but setting time is slow (about 3 hours) and material is prone to displacement
Solution Approach 1:
The patent modifies the chemical composition parameters of MTA by incorporating calcium aluminate cement (CA) alongside Portland cement, adjusting the calcium sulfate content to 0-10%, and adding fluoride compounds. These parameter changes enable the material to maintain high pH for antibacterial effects while achieving rapid setting within 5-15 minutes through optimized hydration kinetics.
Solution Approach 2:
The invention creates a composite material system combining Portland cement, calcium aluminate cement, calcium sulfate, and fluoride compounds in specific proportions. This composite formulation synergistically integrates the high pH antibacterial properties of traditional MTA with the rapid setting characteristics of calcium aluminate cement, resolving the contradiction between setting speed and antibacterial effectiveness.
2Stability of the object's composition
If Portland cement with calcium sulfate is used, then calcium aluminate hydration is inhibited for slow turnover, but setting time becomes too long (14 minutes or more) for practical dentistry
Solution Approach 1:
The patent optimizes the calcium sulfate content parameter to a specific range of 0-10%, which is lower than traditional Portland cement formulations. This parameter adjustment allows sufficient calcium aluminate hydration to occur within 5-15 minutes while maintaining controlled turnover, making the material clinically applicable without excessive setting time.
Solution Approach 2:
The invention uses a partial amount of calcium sulfate (0-10% rather than the typical 3-7% in standard Portland cement) to achieve the desired balance. This partial action approach allows rapid enough setting for clinical use while still providing sufficient inhibition of calcium aluminate hydration to maintain composition stability during the critical early period.
3Reliability
If fluoride is added to fast-setting MTA, then caries prevention is enhanced, but the material must maintain high pH for optimal antibacterial effects while achieving rapid setting
Solution Approach 1:
The patent develops a multi-component composite material incorporating Portland cement, calcium aluminate cement, calcium sulfate, and fluoride compounds. This composite formulation integrates multiple functions: rapid setting through calcium aluminate cement, high pH maintenance for antibacterial effects, and caries prevention through fluoride release, while managing composition complexity through defined proportion ranges.
Solution Approach 2:
The invented MTA composition serves multiple functions simultaneously: it provides rapid setting (5-15 minutes), maintains high pH for antibacterial activity, releases fluoride for caries prevention, and ensures adequate mechanical strength. This multi-functionality is achieved through the synergistic combination of different cement types and additives in specific proportions.
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 fast-setting MTA with enhanced fluoride release, improved mechanical strength, and sustained antibacterial effects, effectively addressing caries and pulp disease while maintaining tooth structure integrity.
Implementation Method 1
polyacid-based hydration enhancing material
Implementation Method 2
Fluoride ions in water, from tooth paste, et cetera, can exchange hydroxyl groups in apatite in the teeth. Fluorapatite has lower solubility and it is more acid resistant than hydroxyapatite.
Implementation Method 3
Several tooth pastes and also dental materials release fluoride for caries prevention
Implementation Method 4
MTA has a high alkalinity which counteracts oral bacteria
Data Source
Figure 1~11
AI summary
The present application discloses a fast-setting mineral trioxide aggregate (MTA) with fluoride release for practical treatment of diseases in teeth and bone, e.g. for caries treatment and/or prevention. The cariostatic MTA contain calcia-silica-alumina cement with moderately increased tricalcium aluminate content allowing high calcium hydroxide release. The MTA composition support remineralization and biomineralization, and it is suitable for stimulation of hard tissue regeneration. MTA embodiments contain superplasticizerand nanosilicate for improved mechanical properties. The MTA compositions include optional radiocontrast and nano-enriched leachable fluorine, nitrate, strontium, and phosphate.The fast-setting MTA paste exhibits flow-to-clay-like consistency, which allows new practical applications including cavity lining, temporary restoration, bonding, and cementations in one MTA embodiment. The high calcium hydroxide and high fluoride release are suitable for caries prevention and treatment, and per se inhibition of dental symptoms.