Orthodontic Bracket Ligation Mechanism for Secure Position Feedback
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Solution Overview
Problem
Existing orthodontic bracket designs experience non-homogeneous force distribution during ligation, making it difficult to determine when the archwire has reached a secure position, and deformation can complicate the installation process.
Innovation Solution
The improved orthodontic bracket features a ligating member with a dynamic mechanical engagement mechanism, including a wave profile edge and posts, providing stable force throughout the sliding motion and clear haptic feedback for secure position indication, using materials resistant to deformation like stainless steel or hard plastic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ligation methods are used with elastomeric or wire ligatures, then the archwire can be secured in the bracket slot, but non-homogeneous force distribution occurs during sliding and clear force-feedback indication is not provided
Solution Approach 1:
The ligating member incorporates a tactile feedback mechanism through its wave profile edge geometry that provides clear haptic indication to the installer when the archwire reaches the secure closed position. The undulating surface creates distinct tactile sensations during sliding that confirm proper engagement, eliminating the ambiguity present in conventional ligation methods.
Solution Approach 2:
The patent changes the geometric parameters of the ligating member by incorporating a wave profile with specific undulating features. This geometric modification transforms the force distribution characteristics during sliding, creating more homogeneous force application and providing measurable tactile feedback at key positions throughout the sliding motion.
2Strength
If conventional ligation designs are used, then the archwire can be held in place, but deformation of the bracket and/or archwire results in difficulties installing or securing the bracket
Solution Approach 1:
The ligating member is designed with dynamic characteristics through its wave profile geometry that allows it to adapt to minor deformations in the bracket or archwire during installation. The undulating surface can accommodate slight variations in positioning while maintaining secure engagement, making the system more tolerant of real-world manufacturing tolerances and installation variations.
3Stability of the object's composition
If a ligating member with dynamic mechanical engagement is implemented, then stable force throughout sliding motion is achieved, but device complexity increases
Solution Approach 1:
The ligating member employs a wave profile with smooth curved undulations rather than sharp angles or complex mechanical components. This curved geometry provides stable force distribution throughout the sliding motion while maintaining manufacturing simplicity and avoiding the need for additional mechanical engagement mechanisms, thus limiting the increase in device complexity.
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
This design ensures consistent force distribution and easy identification of secure positions, reducing installation difficulties and enhancing the tactile feedback for users.
Implementation Method 1
providing stable force throughout the sliding motion and clear haptic feedback for secure position indication
Data Source
AI summary
A self-ligating orthodontic bracket for installation on a tooth includes a bracket body defining an archwire slot, the bracket body including a lingual surface configured to be mounted on a tooth. One or more posts extend outward from a first surface of the bracket body, and a ligating member is moveable along the first surface between a first, open position which allows access to the archwire slot, and a second, closed position which restricts access to the archwire slot. The ligating member includes projections to contact the one or more posts and maintain the ligating member in at least one of the open position, closed position, and a transition movement between the open position and the closed position.