Multi-colored Dental Shaped Body Seamless Color Gradient
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Solution Overview
Problem
Existing multi-colored shaped bodies for dental restorations with differently colored layers have perceptible color boundaries between individual layers, necessitating additional veneering to meet aesthetic requirements.
Innovation Solution
A multi-colored shaped body with layers arranged in a specific configuration, including at least two main layers and intermediate layers where the color change direction between intermediate layers is contrary to that of the main layers, or where intermediate layers comprise a mixture of the materials of the successive main layers, to create a seamless color gradient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multi-colored shaped bodies with differently colored layers are used to simulate natural tooth coloration, then the aesthetic properties of dental restorations are improved, but clearly perceptible color boundaries between layers appear which make the restoration look unnatural
Solution Approach 1:
The patent introduces intermediate layers between the differently colored main layers to act as a mediator. These intermediate layers have color properties that are intermediate between the adjacent main layers, creating a gradual color transition. This mediator approach eliminates the sharp color boundaries that would otherwise be perceptible, allowing the multi-colored structure to achieve natural aesthetic appearance without visible layer transitions.
2Productivity
If conventional multi-layered blocks are used to simplify manufacture of dental restorations, then production efficiency is improved, but additional veneering steps are required to eliminate visible color boundaries
Solution Approach 1:
The patent applies preliminary action by pre-configuring the layered structure with intermediate layers during the block manufacturing process itself. The color gradient and intermediate layers are built into the shaped body before the restoration is manufactured, so that the color boundary problem is preemptively solved at the material level rather than requiring corrective veneering steps later. This preliminary structuring eliminates the need for additional veneering operations.
3Difficulty of detecting and measuring
If pressure is applied to contact surfaces of differently colored layers to mix starting materials, then color boundary perceptibility is reduced, but adequate mixing is not achieved and boundaries remain visible
Solution Approach 1:
The patent applies local quality by assigning different color properties to different local regions (layers) of the shaped body. Instead of attempting to uniformly mix all colors throughout, the patent creates a locally optimized structure where each layer has a specific intermediate color property tailored to bridge the transition between adjacent main layers. This localized color differentiation at the layer level achieves smooth gradients without requiring extensive mixing.
Data Source
AI summary
The present invention relates to a multi-colored shaped body having layers arranged on top of one another for producing dental restorations, a process for its production and its use for the manufacture of dental restorations.