Orthodontic Bracket Plating for Complex Multi-Material Geometries
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Solution Overview
Problem
Conventional manufacturing methods for orthodontic appliances, such as metal injection molding and rapid prototyping, are limited in design flexibility and material complexity, restricting the creation of desired features like undercuts and multi-material components, and face challenges in dimensional control and cost due to mold limitations and post-processing requirements.
Innovation Solution
A method involving layering of materials on a substrate to build up a layered structure, allowing for the formation of complex geometries and multi-material components without the need for molds, where sacrificial materials are used to create features like undercuts and overhangs, and structural materials are used to form the final appliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional manufacturing methods like metal injection molding or rapid prototyping are used, then production capability is achieved, but design flexibility and material complexity are limited
Solution Approach 1:
The appliance is divided into multiple layers, each formed by separate plating processes. This segmentation allows each layer to be independently designed and manufactured with different materials and geometries, enabling complex multi-material designs that would be impossible with conventional single-step manufacturing methods.
Solution Approach 2:
The invention transitions from conventional 3D volumetric manufacturing to a layered 2D-sequential approach. By building the appliance layer-by-layer through repeated plating, the method adds a temporal dimension to the manufacturing process, allowing complex internal geometries and undercuts to be formed without mold constraints.
2Productivity
If molds are used for manufacturing, then large quantity production is enabled, but feature complexity and geometry freedom are restricted
Solution Approach 1:
The invention replaces the mechanical mold-based forming system with an electrochemical plating system. Instead of forcing material into a rigid mold cavity, the plating process deposits material conformally onto a mandrel, allowing complex geometries including undercuts and overhangs to be formed without mechanical interference or demolding constraints.
3Device complexity
If single-material manufacturing is used, then process simplicity is maintained, but multi-material component creation is impossible
Solution Approach 1:
Different layers of the appliance are manufactured using different materials selected for their specific functional requirements. For example, elastic modules can be made from elastomeric material while rigid sections use metallic or ceramic materials. This local differentiation of material properties enables multi-material components with optimized performance for each region.
Solution Approach 2:
The appliance is constructed as a composite structure with multiple materials bonded together through the plating process. Each layer can be a different material, creating a multi-material composite component that combines the advantages of different material classes (elasticity, rigidity, biocompatibility) within a single integrated appliance.
4Ease of manufacture
If conventional manufacturing processes are used, then standard production is achieved, but post-processing and assembly requirements increase
Solution Approach 1:
Multiple components that would traditionally require separate manufacturing and assembly operations are merged into a single integrated structure formed by the layered plating process. The appliance is built as one continuous piece with internal features formed during the layering process itself, eliminating the need for post-formation assembly operations.
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
Enables the production of orthodontic appliances with complex geometries and multi-material designs that were previously unmanufacturable, improving design flexibility and reducing manufacturing costs by eliminating the need for molds and post-processing assembly, while maintaining precision and functionality.
Implementation Method 1
The plating process includes immersing the substrate and previous layers in a plating solution and passing a current through the plating solution to plate material from the plating solution onto the substrate and previous layers in a pattern
Implementation Method 2
The sacrificial material is removed from the layered structure by chemical etching or dissolution to leave the appliance
Data Source
AI summary
A method of manufacturing an orthodontic appliance includes plating a first pattern of a material on a substrate to define a layer. Repeating plating of the first material one or more times forms an additional pattern. A layered structure is built up and forms a portion of the orthodontic appliance. A pattern of a second material different from a first material may be plated on the substrate or on a pattern of the first material. The material may be a sacrificial material that may be later removed. The orthodontic appliance may be an archwire or a self-ligating orthodontic bracket having one or more layered structures formed by plating patterns of the material. Plating may include plating patterns of materials so as to form a movable member in place relative to a bracket body.