Orthodontic Distalizer With Spring Rod for Compliance-Free Molar Movement
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Solution Overview
Problem
Existing orthodontic appliances face challenges in achieving distal tooth movement due to patient compliance issues, high costs, inefficiency, discomfort, and frequent breakage, requiring significant patient cooperation and multiple visits for repairs.
Innovation Solution
A distalizer appliance comprising a molar bracket, bicuspid bracket, and a rod system with a spring member, allowing for easy installation and repair, minimizing patient discomfort, and enabling efficient tooth movement without anchorage on adjacent teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional appliances (headgear, elastics, functional appliances) are used to distalize teeth, then patient compliance is required for the movements to be achieved, but this leads to treatment failure when patients do not cooperate
Solution Approach 1:
The appliance uses a spring member that automatically activates and maintains continuous force on the molar tooth without requiring patient action. The spring member expands to push the molar distally and automatically recharges from the activated state, creating a self-sustaining treatment system that does not rely on patient compliance for force application.
2Reliability
If appliances are designed to be durable and never break, then reliability is improved, but manufacturing cost and complexity increase significantly
Solution Approach 1:
The appliance is divided into separate modular components: brackets that bond to teeth, a rod member that connects brackets, and a spring member that provides force. This segmentation allows each component to be manufactured independently using simple, cost-effective processes while maintaining overall system reliability through modular assembly.
3Productivity
If appliances achieve desired results in a short time frame, then productivity is improved, but patient comfort deteriorates due to increased force or complexity
Solution Approach 1:
The spring member is designed with specific mechanical properties (spring rate, coil density, material composition) that allow it to deliver optimal force within comfortable limits for the patient. The rod member length and bracket positioning are adjusted to optimize the mechanical advantage, enabling efficient tooth movement at forces that do not compromise patient comfort.
4Reliability
If appliances require multiple patient visits for repairs and adjustments, then reliability is improved through monitoring, but loss of time and treatment efficiency worsen
Solution Approach 1:
The appliance is designed as a disposable or limited-use component system where the spring member can be easily replaced if it fails or loses tension. The simple modular design allows for quick replacement at the next routine appointment without requiring complex repairs, minimizing treatment interruption and patient time loss.
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 appliance facilitates rapid and efficient distal tooth movement with minimal patient cooperation, reduced costs, and ease of repair, while maintaining comfort and minimizing unwanted tooth movements.
Implementation Method 1
a spring member secured to the rod member
Data Source
AI summary
A distalizer appliance is provided. The distalizer appliance uses a molar bracket, a bicuspid bracket, and a rod. A spring is secured between an end of the rod and a fastener secured on a jaw of a patient. The molar bracket and the bicuspid bracket are secured to a molar and a bicuspid, via bonding pads. The molar bracket acts as a fulcrum for the rod in order to drive the molar distally and the bicuspid bracket acts to guide the rod.