Endodontic File Phase Composition for Cutting and Flexibility
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Solution Overview
Problem
Existing endodontic files face challenges in achieving a balance between high cutting capacity and flexibility, leading to potential damage to the root canal and rapid wear, while also being difficult to manufacture with precise dimensions.
Innovation Solution
An endodontic file with a cutting area composed of austenitic and martensitic materials, combined with a support area, allowing for high cutting capacity and flexibility, manufactured through a method involving heat treatments to achieve these properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the endodontic file has high hardness to achieve high cutting capacity, then the cutting capacity is improved, but the file becomes highly rigid which causes deformation of the root canal and damage to its walls
Solution Approach 1:
The file applies different material properties to different sections: the cutting area at the tip uses austenitic material for flexibility and adaptation, while the support area further back uses martensitic material for high cutting capacity. This local differentiation allows each section to perform its specific function optimally without compromising the other.
Solution Approach 2:
The file is constructed as a composite structure with two distinct material phases: an austenitic portion in the cutting area and a martensitic portion in the support area. This composite approach combines the advantages of both materials - the flexibility and adaptability of austenite with the hardness and cutting ability of martensite.
2Adaptability or versatility
If the endodontic file has high flexibility to achieve good adaptation to dental anatomy, then the adaptability is improved, but the cutting capacity becomes low which makes it difficult to operate inside the root canal
Solution Approach 1:
The file applies different material properties to different sections: the cutting area at the tip uses austenitic material for flexibility and adaptation, while the support area further back uses martensitic material for high cutting capacity. This local differentiation allows each section to perform its specific function optimally without compromising the other.
Solution Approach 2:
The file is constructed as a composite structure with two distinct material phases: an austenitic portion in the cutting area and a martensitic portion in the support area. This composite approach combines the advantages of both materials - the flexibility and adaptability of austenite with the hardness and cutting ability of martensite.
3Strength
If the cutting edge has high hardness to penetrate the root canal and remove debris, then the cutting capacity is improved, but the file experiences rapid wear and possibility of breakage
Solution Approach 1:
The patent applies heat treatment parameters to transform the material structure. The austenitic portion undergoes heat treatment to achieve its specific crystalline structure and properties, while the martensitic portion undergoes different heat treatment to achieve high hardness and wear resistance. This parameter control allows optimization of both cutting ability and durability.
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 file effectively removes debris from the root canal with minimal damage and improved fatigue strength, enhancing cleaning results and adaptability to dental anatomy.
Implementation Method 1
manufactured through a method involving heat treatments to achieve these properties
Implementation Method 2
the first portion comprises an austenitic material and the second portion comprises a martensitic material
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
The present invention relates to an endodontic file, in particular to a mechanical endodontic file configured to penetrate and remove material contained in a root canal of a patient undergoing endodontic treatment. The present invention also relates to a method of manufacture of said endodontic file.