Self-Ligating Bracket With Sliding Spring Clip
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Solution Overview
Problem
Traditional orthodontic brackets require separate elastomeric ligatures to secure arch wires, which can be cumbersome and may not provide consistent retention, whereas self-ligating brackets aim to eliminate this need by mechanically securing the arch wire within the bracket.
Innovation Solution
The self-ligating bracket assembly features a spring clip with a distal and mesial arm that moves between open and closed positions, occluding the arch wire slot to retain the wire, utilizing a sliding dovetail joint and nickel-titanium material for resilience and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastomeric ligatures are used to secure the arch wire, then the arch wire can be retained in the bracket, but the device becomes more complex and requires additional components
Solution Approach 1:
The patent combines the arch wire retention function directly into the bracket body by integrating a movable cover that can occlude the arch wire slot. This eliminates the need for separate elastomeric ligatures, merging two previously separate components (bracket and ligature) into a single integrated bracket assembly, thereby reducing device complexity while maintaining retention reliability
Solution Approach 2:
The patent extracts the elastomeric ligature component from the bracket system entirely. By removing this separate component and replacing it with an integrated movable cover mechanism built into the bracket body, the design eliminates the need for additional parts while achieving the same arch wire retention function
2Reliability
If separate elastomeric ligatures are used, then arch wire retention is achieved, but the treatment process becomes more time-consuming
Solution Approach 1:
By merging the retention mechanism into the bracket body itself, the patent allows the arch wire to be secured through a single sliding or snapping motion of the integrated cover, eliminating the time required to separately tie and secure elastomeric ligatures around the bracket and arch wire
Solution Approach 2:
The movable cover is pre-positioned in an open state during bracket fabrication, allowing the arch wire to be inserted into the slot first, after which the cover is simply closed to secure the wire. This preliminary positioning eliminates the need for complex assembly steps required with elastomeric ligatures
3Ease of manufacture
If a mechanical self-ligating mechanism is used, then elastomeric ligatures are eliminated, but the bracket structure becomes more complex
Solution Approach 1:
The patent employs a dynamic movable cover that can transition between open and closed positions, allowing the bracket to adapt its configuration based on whether the arch wire needs to be inserted or retained. This dynamic element provides automatic ligatureless retention while maintaining manufacturing simplicity through a single moving component rather than multiple interconnected parts
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 allows for efficient insertion and retention of arch wires without elastomeric ligatures, providing a secure and adjustable mechanism that maintains the arch wire in place throughout orthodontic treatment, enhancing treatment efficiency and comfort.
Implementation Method 1
A spring clip includes a distal arm and a mesial arm... The spring clip is slidably secured within the bracket body... The spring clip is moveable between an open position and a closed position
Implementation Method 2
The spring clip is slidably secured within the bracket body by respective sliding engagement of the distal arm with the distal channel and the mesial arm with the mesial channel
Data Source
AI summary
A self-ligating bracket includes a bracket body with a mesial and a distal channel. A spring clip includes a distal arm with a distal arm body and a distal finger and a mesial arm with a mesial arm body and a mesial finger. The spring clip is slidably secured within the bracket body by a sliding engagement of the distal arm with the distal channel and the mesial arm with the mesial channel. The spring clip is movable between an open position and a closed position wherein in the open position, the arch wire slot is unobstructed and in the closed position the mesial finger and distal finger extend into and across the arch wire slot to occlude the arch wire slot.