Orthodontic Bracket Guide Groove Clip Retention
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Solution Overview
Problem
Conventional orthodontic brackets face issues with clip detachment due to excessive force from biting or foreign objects, leading to increased height and discomfort, and interference between clip extensions and tooth surfaces, especially when curvature and angle variations occur between upper and lower jaws.
Innovation Solution
The orthodontic bracket design features a guide groove parallel to the archwire slot, a wire retaining hood, excessive opening prevention projections, bifurcated upper clip ends, and a tool locking projection, which reduce the height of the bracket and prevent unintended clip rotation by canceling lifting forces through a repulsive guide groove mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lower extended part of the clip is formed longer to pass through the bracket body, then the clip can be inserted at large angles, but the bracket height increases causing patient discomfort
Solution Approach 1:
The guide groove is positioned below the archwire slot, changing the spatial dimension of the insertion path. This allows the lower extended part to follow a different trajectory that accommodates large insertion angles without increasing the vertical height of the bracket, thus resolving the contradiction between adaptability and compactness.
2Adaptability or versatility
If the wall thickness below the slot is increased to prevent interference, then the clip can be inserted at large angles, but the bracket height increases
Solution Approach 1:
Instead of increasing wall thickness in the vertical direction, the guide groove is positioned below the archwire slot to provide a horizontal insertion path. This dimensional change allows large insertion angles without increasing bracket height, as the guide groove directs the clip along a path that avoids vertical interference.
3Reliability
If the clip is designed to prevent detachment under excessive force, then reliability improves, but device complexity increases
Solution Approach 1:
The guide groove positioned below the archwire slot creates a counterbalancing geometric constraint that opposes lifting forces. When excessive force attempts to detach the clip, the groove's geometry provides a mechanical counterforce that maintains attachment reliability without requiring additional complex locking mechanisms.
Solution Approach 2:
The guide groove incorporates curved surfaces that guide the clip's movement and maintain engagement. The curvature of the groove walls provides smooth guidance and mechanical retention, preventing detachment under force while maintaining a simple overall structure without sharp edges or complex joints.
Data Source
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AI summary
In an orthodontic bracket 1, 101, 201 including a base part 2, a bracket body 3 which is fixed to the base part 2, and a clip 4 having a substantially U-shape in section which is mounted on the bracket body 3 so as to move, an archwire slot 5 in a shape of a groove which can contain an archwire is provided on an upper face of the bracket body 3, a guide groove 9 for guiding a lower extended part 42 of the clip 4 is formed on a lower face of the bracket body 3, and the guide groove 9 is provided at a position below the archwire slot 5. In a state where the slot is closed, an end 45 of the lower extended part 42 of the clip 4 does not pass through the bracket body 3 up to a side face at an opposite side to the curved part of the bracket body 3. In this manner, it is possible to provide an orthodontic bracket which has a lower height and has less possibility that a clip may be detached.