Pre-reacted MTA Dispersion in Polymer Matrix
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Solution Overview
Problem
Reactive mineral trioxide aggregate (MTA) compositions in endodontics require a time-consuming mixing step, which can lead to handling errors and suboptimal results due to the need for precise mixing conditions.
Innovation Solution
A dental composition comprising pre-reacted particulate mineral trioxide aggregate (MTA) dispersed in a polymer matrix, with the MTA content ranging from 20 to 50% by weight, which is cured, milled to a specific particle size, and then dispersed in a non-aqueous polymer matrix to improve handling properties while maintaining tissue regeneration capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reactive MTA composition is used to stimulate dental tissue regeneration, then the ability to stimulate regeneration is improved, but the handling properties deteriorate due to time-consuming mixing requirements
Solution Approach 1:
The MTA particles are pre-reacted and pre-mixed with the polymer matrix during manufacturing, eliminating the need for time-consuming mixing by the practitioner. The reactive MTA is pre-combined with essential components (calcium sulfate, calcium hydroxide, bismuth oxide) and dispersed in the polymer matrix before curing, so the material is ready for immediate application without compromising its tissue regeneration capability.
Solution Approach 2:
The invention changes the physical state and composition parameters of the MTA material. By controlling the particle size of pre-reacted MTA (0.63-45 microns) and its concentration in the polymer matrix (20-60 wt%), the material achieves both improved handling properties and maintained biological activity. The polymer matrix composition and curing conditions are also optimized to balance workability and tissue regeneration.
2Reliability
If reactive MTA composition is used to maintain biological activity, then the ability to stimulate cementum formation is improved, but the complexity of the application process increases due to mixing requirements
Solution Approach 1:
The invention merges multiple functions into a single material system. The pre-reacted MTA particles embedded in the polymer matrix simultaneously provide biological activity (stimulating cementum formation), structural integrity, and ease of application. The polymer matrix itself contains multiple bioactive components (calcium sulfate, calcium hydroxide, bismuth oxide) that work synergistically with the MTA particles, eliminating the need for separate mixing steps while maintaining all biological functions.
3Productivity
If pre-reacted particulate MTA is dispersed in polymer matrix to improve handling, then the handling efficiency is improved, but the particle size and distribution control becomes more critical
Solution Approach 1:
The invention applies local quality control by specifying different particle size ranges for different portions of the MTA content. The patent defines a broad overall range (0.63-45 microns) but implies that optimal performance is achieved through controlled distribution of particles across this range, with finer particles (0.63-10 microns) providing surface area for biological activity and larger particles (10-45 microns) providing structural support. This localized control of particle properties throughout the matrix ensures both handling efficiency and manufacturing precision.
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 enhances handling efficiency and maintains the ability to stimulate dental tissue regeneration, providing a biocompatible, antibacterial, and bioinductive material for endodontic treatments without inducing inflammation, and supports tissue regeneration.
Implementation Method 1
the dental composition is bio inductive for cementum; wherein the dental composition stimulates a hard tissue covering where a blood supply exists (apical foramen, interface with healthy pulp) thereby regenerating cementum
Implementation Method 2
pre-reacted particulate mineral trioxide aggregate (MTA) dispersed in a polymer matrix
Implementation Method 3
wherein the polymer matrix includes chemically cross-linked or crystalline polymers; (i) curing an MTA composition
Data Source
AI summary
A dental composition comprising a pre-reacted particulate mineral trioxide aggregate (MTA) dispersed in a polymer matrix wherein the content of MTA in the composition is in the range of 20 to 50 percent by weight based on the total weight of the composition.