Endodontic File Amorphous TiZrB Coating Fatigue Resistance
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Solution Overview
Problem
Conventional endodontic files made of metal alloys like nickel-titanium often suffer from fatigue issues, leading to fractures during prolonged use in root canal treatments, which prolongs the procedure and may cause patient discomfort during removal.
Innovation Solution
An endodontic file with a conical body coated with an amorphous titanium-zirconium-boron film, which distributes applied forces across its surface, reducing fatigue and the likelihood of fracture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metal alloy endodontic files are used, then the file can perform debridement function, but the file exhibits fatigue problems and fractures during prolonged use
Solution Approach 1:
The patent applies a composite material structure consisting of a metal alloy conical body combined with an amorphous titanium-zirconium-boron film coating. This composite structure provides both the mechanical strength needed for debridement and the fatigue resistance of the amorphous film, resolving the contradiction between reliability and strength.
Solution Approach 2:
The patent changes the physical and chemical parameters of the file surface by applying an amorphous film with specific composition (titanium-zirconium-boron) and structure. This parameter change enhances the fatigue resistance without compromising the underlying metal alloy's strength, allowing the file to withstand prolonged use.
2Productivity
If the endodontic file is rotated in the root canal for a long period, then the debridement is more thorough, but the file is likely to be fractured due to fatigue
Solution Approach 1:
The amorphous titanium-zirconium-boron film coating on the metal alloy body creates a composite structure that maintains high durability during prolonged rotation, enabling thorough debridement without fracture risk.
Solution Approach 2:
The amorphous film provides localized fatigue resistance at the surface where stress concentrates during rotation, while the bulk metal alloy maintains its strength properties, allowing extended use for thorough debridement.
3Strength
If the endodontic file is made of metal alloy, then the file has sufficient strength for debridement, but the file exhibits fatigue problems under repeated loading
Solution Approach 1:
The patent creates a composite system where the metal alloy conical body provides the strength needed for debridement, while the amorphous titanium-zirconium-boron film layer provides fatigue resistance under repeated loading conditions.
Solution Approach 2:
By changing the surface material parameters through amorphous film deposition, the patent enhances fatigue resistance while preserving the bulk metal alloy's strength properties for effective debridement.
Data Source
AI summary
An endodontic file with improved fatigue resistance comprising a conical body made of a metal alloy and an amorphous titanium-zirconium-boron film deposited on a surface of the conical body.