Layered Denture Manufacturing via Segmented CAD/CAM Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional denture manufacturing methods fail to adequately address aesthetics and function, particularly in mimicking natural tooth structure and maintaining enamel strength, as they lack anatomical roots and require grinding that weakens the denture.
Innovation Solution
A method for manufacturing layered dentures by machining a material blank to form cavities, filling with different materials to create layers that simulate roots and reinforce the enamel layer, using CAD/CAM technology and 3D digital images for balanced occlusion and realistic appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional denture teeth are made using injection molding or pressure molding techniques, then manufacturing is simplified, but anatomical roots cannot be incorporated and aesthetic appearance is compromised
Solution Approach 1:
The denture tooth is divided into multiple segments: a denture base portion and a tooth portion, with the tooth portion further segmented into enamel and dentin layers. This segmentation allows each layer to be manufactured separately with appropriate materials and then assembled, enabling anatomical root structures while maintaining manufacturing feasibility through modular construction
Solution Approach 2:
The tooth portion is constructed with nested layers where the enamel layer surrounds the dentin layer, which in turn surrounds the denture base portion. This nested structure mimics natural tooth anatomy with roots extending into the baseplate, achieving realistic appearance while using standardized manufacturing processes for each layer
2Reliability
If denture teeth are ground to achieve balanced occlusion, then denture stability is improved, but enamel layer is removed and teeth are weakened
Solution Approach 1:
Balanced occlusion is achieved through preliminary digital design and planning before manufacturing. The enamel surfaces are contoured during the manufacturing process itself rather than requiring post-manufacturing grinding, allowing the full enamel layer to be preserved while achieving proper occlusal balance through precise initial shaping
Solution Approach 2:
The traditional mechanical grinding process is replaced with precision machining and digital fabrication methods that can achieve balanced occlusion surfaces without removing excessive material. This substitution allows for more precise control over enamel thickness while achieving the same functional outcome
3Productivity
If the denture base is formed first in traditional manufacturing, then manufacturing sequence is simplified, but the enamel layer does not receive sufficient strength enhancement
Solution Approach 1:
The manufacturing sequence is inverted by forming the tooth portion with enamel and dentin layers first, then creating the denture base portion that surrounds and supports these layers. This reversal allows the enamel layer to be manufactured with optimal strength characteristics before being integrated into the final denture structure, ensuring the wear-resistant layer receives appropriate attention
Data Source
AI summary
A method of manufacturing a layered denture in which the enamel layer or the tooth layer is manufactured first and the denture base is manufactured last. The resulting denture may exhibit an enamel layer or a tooth layer with enhanced strength and/or resiliency. The resulting denture may have one or more of an integrated layer, balanced occlusion, and a root approximating structure.