Hexagonal Orthodontic Archwire for Early Torque Delivery
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Solution Overview
Problem
Existing orthodontic archwires face issues with inadequate torque delivery due to dimensional mismatches between the wire and bracket slots, leading to prolonged treatment times and the need for additional stock inventory and operator skill.
Innovation Solution
A non-rectangular, preferably hexagonal cross-section archwire design that fits seamlessly into standard self-ligating brackets, allowing early torque delivery and reducing friction, thereby shortening treatment time and simplifying inventory management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rectangular cross-section archwire is used to fit into standard bracket slots, then the wire can be easily manufactured and inserted, but torque delivery is inadequate due to dimensional mismatches between the wire and bracket slot
Solution Approach 1:
The archwire cross-section is changed from a conventional rectangular shape to an asymmetric shape with two long sides and two short sides, where the long sides are substantially parallel to the long sides of the bracket slot when engaged. This asymmetric geometry provides improved torque control by reducing dimensional mismatches and minimizing slop between the wire and bracket slot, while remaining manufacturable through standard wire forming processes.
2Productivity
If traditional round or rectangular archwires are used, then the treatment time is prolonged due to inadequate torque delivery, but changing the wire cross-section increases manufacturing complexity
Solution Approach 1:
The asymmetric cross-section design with two long parallel sides and two short sides optimizes torque delivery to accelerate treatment progress. The geometry provides better engagement with the bracket slot dimensions, reducing slop and improving mechanical efficiency, thereby shortening treatment time without requiring complex manufacturing processes.
3Loss of energy
If the archwire cross-section does not match the bracket slot dimensions, then friction between the wire and bracket slot increases, but customizing the wire dimensions requires additional stock inventory
Solution Approach 1:
The asymmetric archwire cross-section is designed to be universally compatible with standard self-ligating bracket slots while optimizing friction reduction. The two long sides substantially parallel to the bracket slot long sides provide improved engagement that reduces frictional energy loss during tooth movement, eliminating the need for multiple wire规格 variants and simplifying inventory management.
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 hexagonal archwire provides improved torque control and reduces treatment duration by enabling earlier torque application, while being cost-effective and easy to use, minimizing the need for additional bracket modifications.
Implementation Method 1
the introduction of nickel titanium archwires meant that contact point alignment and torque application became simpler and required fewer archwire bends due to the shape memory and superelastic properties of nickel titanium
Implementation Method 2
the introduction of nickel titanium archwires meant that contact point alignment and torque application became simpler and required fewer archwire bends due to the shape memory and superelastic properties of nickel titanium
Data Source
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AI summary
An archwire (10) is located in a lumen (12) of a self-ligating orthodontic bracket (14) or molar tube. The archwire (10) has a non-rectangular cross-section comprising two opposite pairs of substantially right-angled edges connected together by respective connecting edges. The archwire (10) engages with opposite sides of the lumen (12) in the orthodontic bracket (14) or molar tube. In the preferred embodiment, the non-rectangular cross-section (16) comprises a non-regular hexagon.