Denture Production With Magnetic Tooth Positioning
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Solution Overview
Problem
Conventional methods for designing full-arch dental prosthetics, such as dentures, are time-consuming and inefficient due to the inability of traditional wax rims to capture critical 3D parameters like the occlusal plane, buccal corridor, and vertical dimension, and require multiple iterations for achieving functional and aesthetic satisfaction.
Innovation Solution
A prosthetic positioning assembly comprising a maxillary tray with a biocompatible magnetic metal carriage frame and moveable components, allowing for precise adjustment and verification of 3D parameters like midline, incisal edge position, and buccal corridor, combined with a CAD system for digital mesh alignment and tooth positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional wax rim is used to design dentures, then the process is simple and familiar, but it cannot capture critical 3D parameters like occlusal plane, buccal corridor, and vertical dimension
Solution Approach 1:
The positioning assembly is divided into multiple independent components: a carriage frame with adjustable carriers, each carrier holding individual denture teeth. This segmentation allows each tooth to be independently positioned and adjusted to capture precise 3D parameters while keeping the overall system manageable through modular construction
Solution Approach 2:
The carriage frame and carriers are designed to be movable and adjustable rather than fixed. The carriers can be repositioned along the carriage frame to adjust tooth position, and the entire assembly can be adapted to capture various 3D parameters including occlusal plane, buccal corridor, and vertical dimension
2Manufacturing precision
If dentist places pre-made denture teeth one-by-one into wax rim by hand, then adjustments can be made, but the process is highly skilled and time consuming
Solution Approach 1:
The manual hand-placing process is replaced with a mechanical positioning system where denture teeth are mounted on adjustable carriers that can be precisely positioned using mechanical adjustment mechanisms. This substitution maintains positioning accuracy while significantly reducing the time and skill required
Solution Approach 2:
The system allows for easy adjustment of tooth position parameters through the movable carriers and carriage frame. By changing the position parameters of the carriers along the frame, precise tooth positioning is achieved without requiring manual dexterity and skill
3Reliability
If wax-up is shipped back and forth between dentist and dental technician for adjustments, then modifications can be made, but multiple iterations are required
Solution Approach 1:
The positioning assembly enables the dentist to independently make all necessary adjustments to denture tooth position in the patient's mouth without requiring the wax-up to be sent to the dental technician for modifications. The dentist can directly adjust the carriers and carriers' positions to achieve the desired functional and aesthetic outcomes
Solution Approach 2:
The system allows the dentist to perform all positioning and adjustment actions preliminarily during the initial patient appointment. By capturing all 3D parameters and making all necessary adjustments in advance, multiple iterative shipments between dentist and technician are eliminated
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 rapid, accurate, and patient-specific positioning of dental prosthetics in a single chairside appointment, reducing the need for multiple iterations and enhancing the precision of functional and aesthetic outcomes.
Implementation Method 1
a carriage frame component composed of biocompatible magnetic metal material anchored to the maxillary tray
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A dental prosthetic positioning assembly comprises an occlusal assembly and a maxillary arch subassembly. The occlusal assembly includes a maxillary tray configured to be formed in a patient's maxillary alveolar ridge, wherein the maxillary tray comprises a occlusal rim component. The occlusal assembly further includes a carriage frame component composed of biocompatible magnetic metal material anchored to the maxillary tray. The maxillary arch subassembly comprises a plurality of prosthetic maxillary teeth components magnetically anchored to the occlusal rim component. The carriage frame component is moveable with respect to the maxillary tray. The prosthetic maxillary teeth components are individually moveable with respect to each other to achieve a desired dental positioning.