Pre-Activated Arch Expander for Predictable Orthodontic Force
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Solution Overview
Problem
Existing arch expanders in orthodontics require manual adjustment by orthodontists, leading to unpredictable orthodontic force and arch expansion, making it difficult to achieve precise treatment outcomes, especially for children, and often cause discomfort due to repeated appliance removal and installation.
Innovation Solution
A method for designing and manufacturing a pre-activated arch expander that includes determining target arch expansion parameters based on digital dental models, using finite element methods to optimize geometry and material properties, and assembling the expander on a physical model to match a target dental arch form, ensuring consistent and predictable expansion forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual adjustment and activation of arch expansion part by orthodontist is used, then the arch expander can be made according to initial model before treatment, but the actual orthodontic force generated and arch expansion achieved cannot be accurately estimated and differs significantly from expected treatment scheme
Solution Approach 1:
The arch expansion part is pre-activated during manufacturing to generate the predetermined orthodontic force before clinical use. The activation state is prepared in advance based on digital models and target arch parameters, eliminating the need for manual adjustment by the orthodontist and ensuring the actual force matches the expected treatment scheme.
Solution Approach 2:
The design parameters of the arch expansion part (geometry, material properties, activation force) are precisely determined through digital modeling and finite element analysis before manufacturing. This allows accurate prediction and control of the orthodontic force that will be generated, transforming the unpredictable manual adjustment process into a precisely controlled manufacturing parameter specification.
2Ease of operation
If repeated removal and installation of orthodontic appliances is performed, then adjustments can be made during arch expansion process, but patient experiences pain and discomfort resulting in poor cooperation
Solution Approach 1:
All necessary adjustments and activations are performed during the manufacturing process based on digital planning. The arch expander is delivered in the optimal activation state ready for immediate use, eliminating the need for repeated clinical removal and reinstallation that cause patient discomfort.
Solution Approach 2:
Digital models and simulation results provide feedback during the design and manufacturing process to optimize the arch expansion parameters. This ensures the pre-activated expander achieves the desired treatment outcome without requiring repeated clinical interventions.
3Adaptability or versatility
If arch expansion part is made by bending arch wires into expanding springs, then the arch expander can be customized for different patients, but the process relies heavily on physician experience and cannot be accurately predicted
Solution Approach 1:
Digital models of the patient's dentition and target arch form are created to serve as precise templates for designing the arch expansion part. These digital copies allow accurate prediction of the required geometry and activation force, replacing reliance on physician experience with objective digital planning and simulation.
Solution Approach 2:
The manual trial-and-error process of bending arch wires is replaced with computer-aided design and finite element analysis. This substitution of mechanical craftsmanship with computational mechanics enables accurate prediction of orthodontic force and reliable treatment outcomes while maintaining customization.
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 pre-activated arch expander ensures accurate and consistent arch expansion, reducing patient discomfort and improving treatment efficiency by maintaining the expander in a pre-activated state that matches the target dental arch form, thus aligning with the expected orthodontic treatment outcomes.
Implementation Method 1
The elastic recovery force generated by the deformation of the arch expansion part under a force is applied to teeth and transmitted to an alveolar bone
Data Source
AI summary
The application provides methods for designing a pre-activated arch expander, methods and systems for manufacturing a pre-activated arch expander, and pre-activated arch expanders. The method for designing a pre-activated arch expander includes: determining a target arch expansion parameter based on a digital model of an initial dental jaw in an initial dental arch form; determining a digital model of a target dental jaw in a target dental arch form based on the digital model of the initial dental jaw and the target arch expansion parameter; and designing a digital model of a pre-activated arch expander based on the target arch expansion parameter and the digital model of the target dental jaw.