Dental Composite Capsule Viscosity Gradient Injection
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Solution Overview
Problem
Current methods for restoring decayed teeth, particularly interproximal cavities, face challenges in accurately depositing restorative materials without leakage and in navigating tight spaces, due to limitations in dental matrix technology and composite resin delivery systems.
Innovation Solution
The development of preloaded dental capsules and composite dispensers that utilize a viscosity gradient and dual composite resins, including a paste and a flowable composite, with a light-curable resin tooth bonding agent, allowing for precise extrusion and placement of restorative materials through a small dispensing orifice, facilitated by heating or pressure alterations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional dental matrix and composite resin delivery system are used, then the restoration process can be performed with standard equipment, but the restorative material leaks beyond the side of the tooth and cannot fill deep or tight interproximal cavities effectively
Solution Approach 1:
The restorative material is segmented into two distinct composite resins with different viscosities (paste composite and flowable composite) contained in separate compartments within the capsule. The flowable composite with lower viscosity is positioned to fill deep cavities first, followed by the paste composite with higher viscosity for the final restoration, preventing leakage and ensuring precise placement
Solution Approach 2:
The invention changes the viscosity parameter of the composite resins by using two different formulations - a flowable composite with lower viscosity for deep cavity penetration and a paste composite with higher viscosity for final placement. The system also employs temperature control to alter the physical properties of the composite resins, enabling them to flow through small orifices and be precisely deposited
2Adaptability or versatility
If a small dispensing orifice is used to access tight interproximal spaces, then deeper and smaller cavities can be filled, but the composite resin cannot be extruded effectively due to high viscosity
Solution Approach 1:
The system changes the viscosity parameter of the composite resin by using a flowable composite with lower viscosity that can easily extrude through small dispensing orifices. Temperature control is also employed to alter the physical properties of the composite, enabling smooth flow through restricted spaces while maintaining the ability to set properly after placement
Solution Approach 2:
The capsule is segmented into compartments with different composite resins - the flowable composite is positioned to be extruded first through the small orifice to fill deep cavities, followed by the paste composite for final placement, ensuring both deep cavity access and proper material deposition
3Device complexity
If a single composite resin is used in the capsule, then the capsule structure is simple, but the restoration requires multiple materials and steps increasing procedure complexity
Solution Approach 1:
The invention merges multiple composite resins (paste composite and flowable composite) and the bonding agent into a single preloaded capsule with multiple compartments. This integration allows the dentist to perform the entire restoration procedure using one capsule, eliminating the need for multiple material changes and reducing procedural complexity while maintaining high restoration efficiency
Solution Approach 2:
The capsule is designed as a universal device that can restore various types of cavities (interproximal, deep, small) using multiple composite resins with different properties within a single unit. The system provides multi-functionality by combining different viscosity materials, bonding agents, and temperature control capabilities in one device
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
Enables effective restoration of decayed teeth with reduced leakage and deeper cavity filling capabilities, accommodating smaller spaces and anatomic matrices, while maintaining color stability and minimizing polymer shrinkage stress.
Implementation Method 1
The paste composite resin is heated to alter its physical properties to allow increased flowability
Implementation Method 2
A light-curable resin tooth bonding agent is preloaded in the interior space of the body between the second composite resin and a dispensing orifice
Data Source
AI summary
The present invention relates to methods for the restoration of a decayed portion of a tooth or re-restoration of a previously filled tooth, and to dental capsules and dental composite resin dispensers that may be used in the methods for the restoration of a decayed portion of a tooth.