Moldable Fiber Root Canal Post for Crown Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing root canal fastening systems face challenges such as incomplete polymerization, adhesion to canal walls, and inadequate mechanical strength, leading to potential root fractures and prosthesis displacement due to imperfect adaptation and low retentive capacity of pre-manufactured fiber pins.
Innovation Solution
A flexible sleeve system comprising a root section with longitudinal fibers and a crown section with multidirectional fibers, both impregnated with an uncured polymeric matrix, is inserted into the root canal, allowing pre-polymerization within the canal for removal and final polymerization outside, preventing adhesion and enhancing mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-manufactured fiber pins are used, then corrosion resistance and flexibility are improved, but adaptation to canal diameter and retentive capacity deteriorate
Solution Approach 1:
The patent changes the physical state of the fiber pin from pre-manufactured rigid form to a moldable uncured composite state. The fiber reinforcement is embedded in uncured polymeric matrix that can be adapted to any canal diameter, then polymerized in place. This parameter change from rigid to moldable state resolves the contradiction between maintaining fiber corrosion resistance while achieving perfect canal adaptation.
Solution Approach 2:
The patent applies preliminary action by pre-arranging the fiber reinforcement within the uncured polymeric matrix before insertion into the canal. The fibers are positioned and impregnated with resin in advance, allowing the composite to be molded to the exact canal shape during insertion, then fixed through polymerization. This preliminary preparation enables both corrosion resistance and perfect adaptation.
2Reliability
If pre-manufactured fiber pins are used, then corrosion resistance is improved, but mechanical strength of crown section deteriorates
Solution Approach 1:
The patent uses composite materials by combining fiber reinforcement (glass, quartz, carbon, polyamide, or aramid fibers) with uncured polymeric matrix. This composite structure provides both the corrosion resistance of fibers and the moldability of resin. The crown section can be built with optimized fiber orientation and resin composition to achieve high mechanical strength while maintaining corrosion resistance.
Solution Approach 2:
The patent changes the state of the polymeric matrix from uncured to polymerized after insertion. In the uncured state, the matrix is moldable for shaping the crown section. After polymerization, the matrix achieves high mechanical strength. This parameter change resolves the contradiction between ease of shaping and mechanical strength.
3Strength
If the system is left in the root canal for complete polymerization, then structural integrity is improved, but removal for final polymerization becomes difficult due to adhesion
Solution Approach 1:
The patent uses the uncured polymeric matrix as an intermediary state. The matrix remains uncured during insertion and initial shaping, allowing easy removal from the canal. After removal, final polymerization is completed outside the canal. This intermediary uncured state acts as a mediator between the need for structural integrity and the need for easy removal, resolving the contradiction.
4Ease of operation
If the flexible sleeve is made non-adherent to canal walls, then ease of removal is improved, but adhesion for retention deteriorates
Solution Approach 1:
The patent segments the system into two functional parts: the flexible sleeve that provides structural support and the uncured polymeric matrix that provides adhesion. The sleeve itself remains non-adherent for easy removal, while the polymeric matrix cures to provide strong retention. This segmentation resolves the contradiction between ease of removal and retention strength.
Solution Approach 2:
The patent applies local quality by making different parts of the system have different adhesion properties. The flexible sleeve maintains non-adherent properties for easy removal, while the polymeric matrix provides adherent properties for strong retention. This localized differentiation of adhesion properties resolves the contradiction between ease of removal and retention strength.
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 system provides a strong, adaptable root fastening element with improved mechanical strength and retention, reducing the risk of root fractures and prosthesis displacement, while allowing complete polymerization and easy removal for secure crown support.
Implementation Method 1
both impregnated with an uncured polymeric matrix, is inserted into the root canal, allowing pre-polymerization within the canal for removal and final polymerization outside
Data Source
AI summary
The present invention is related to the dentistry field. More precisely, the present invention relates to a system for insertion into the root canal for obtaining a root fastening element to support crowns comprising a sleeve of flexible and moldable material, non-adherent to the walls of the root canal, wherein the sleeve comprises a root section and a crown section which are filled with fibers in different arrangements. In addition, the present invention is related to a method for obtaining a fastening element using the system and root fastening element to support crowns.