Orthodontic Bracket Slot Precision via Electrical Discharge Machining
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Solution Overview
Problem
Current orthodontic technologies face challenges in achieving precise bracket slot formation and minimizing torque errors during tooth alignment, as existing methods lack the precision and efficiency needed for customizing bracket slots and archwire interfaces.
Innovation Solution
The use of electrical discharge machining in conjunction with virtual bracket design allows for the creation of highly precise bracket slots and tubes, enabling a precise archwire-bracket slot interface by forming the bracket slot in the bracket body and simultaneously separating it from the runner, thereby reducing torque errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional bracket bonding methods are used with off-the-shelf brackets, then the bracket can be easily bonded to the tooth, but the bracket slot cannot be positioned precisely close to the tooth surface, resulting in torque errors
Solution Approach 1:
The bracket slot is pre-formed at the precise position and orientation relative to the bonding pad during the bracket manufacturing process, rather than requiring post-bonding adjustment. This preliminary positioning ensures the slot is correctly oriented before the bracket is bonded to the tooth, eliminating torque errors while maintaining simple bonding procedures.
Solution Approach 2:
The invention changes the orientation parameter of the bracket slot relative to the bonding pad. Specifically, the slot is oriented perpendicular to the bonding pad surface rather than parallel, which allows the slot to be positioned closer to the tooth surface while maintaining correct orientation after bonding, thereby reducing torque errors without increasing bonding complexity.
2Manufacturing precision
If the archwire is positioned far from the tooth surface to accommodate standard brackets, then the bracket can be easily manufactured, but the precision of tooth positioning deteriorates due to increased torque error
Solution Approach 1:
The bracket slot is pre-formed at the precise position and orientation relative to the bonding pad during the bracket manufacturing process, rather than requiring post-bonding adjustment. This preliminary positioning ensures the slot is correctly oriented before the bracket is bonded to the tooth, eliminating torque errors while maintaining simple bonding procedures.
Solution Approach 2:
The invention changes the orientation parameter of the bracket slot relative to the bonding pad. Specifically, the slot is oriented perpendicular to the bonding pad surface rather than parallel, which allows the slot to be positioned closer to the tooth surface while maintaining correct orientation after bonding, thereby reducing torque errors without increasing bonding complexity.
3Manufacturing precision
If manual bracket positioning is performed during bonding, then the bracket can be adapted to individual teeth, but the time required for treatment increases and precision is limited by operator skill
Solution Approach 1:
The bracket slot is pre-formed at the precise position and orientation relative to the bonding pad during the bracket manufacturing process, rather than requiring post-bonding adjustment. This preliminary positioning ensures the slot is correctly oriented before the bracket is bonded to the tooth, eliminating torque errors while maintaining simple bonding procedures.
Solution Approach 2:
The invention uses a standardized bracket design with a predetermined geometric relationship between the bonding pad and slot orientation. This standardized template is copied for each bracket, eliminating the need for manual customization while maintaining precise orientation. The consistent geometry ensures that when bonded to the tooth, the slot is automatically positioned correctly without requiring operator skill for alignment.
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 approach significantly enhances precision and efficiency in forming orthodontic appliances, resulting in a more predictable and accurate tooth alignment process with reduced errors, improving the overall orthodontic treatment outcome.
Implementation Method 1
forming the bracket slot in the bracket body and simultaneously separating it from the runner using electrical discharge machining
Data Source
AI summary
A system to manufacture orthodontic appliances, program product, and associated methods are provided. An embodiment of a system can include a virtual orthodontic appliance design computer having orthodontic appliance design program product provided to design a virtual dimensional representation of an orthodontic appliance including bracket bodies and bracket pads, and a mold apparatus positioned to form each bracket body and bracket pad. The system also includes a data processing computer including computer-aided manufacturing program product provided to derive electrical discharge device control instructions including a virtual dimensional representation of a bracket slot in the bracket, and an electrical discharge machining apparatus. The electrical discharge machining apparatus can include a controller including control program product to derive a control signal carrying the electrical discharge device control instructions and an electrical discharge device.