Dental Ceramic Coloring Liquid for Single-Step Gradation
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Solution Overview
Problem
Existing dental ceramics require multiple coloring liquids and steps to achieve a gradation, which is time-consuming and inefficient.
Innovation Solution
A method involving a single coloring liquid containing at least two types of metal ions with a specific difference in standard oxidation-reduction potentials is used to form a gradation inside the dental ceramic in a single step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple coloring liquids are used to achieve gradation in dental ceramic, then the coloring effect is improved, but the number of steps and time required increases
Solution Approach 1:
The patent combines multiple coloring functions into a single coloring liquid by incorporating metal ions with different standard electrode potentials. This allows the dental ceramic to achieve multi-color gradation effects through one coloring step instead of multiple sequential steps, directly resolving the contradiction between coloring quality and process time.
Solution Approach 2:
The patent utilizes changes in electrode potential parameters of metal ions to achieve different coloring effects. By selecting metal ions with specific electrode potential differences (0.5-4.0V), the coloring behavior changes during the firing process, enabling gradation effects without multiple application steps.
2Manufacturing precision
If multiple coloring liquids are used to achieve gradation in dental ceramic, then the coloring effect is improved, but the process complexity increases
Solution Approach 1:
The patent merges multiple coloring liquids into a single composite coloring liquid containing different metal ions. This reduces the number of separate coloring steps and simplifies the overall process while maintaining the ability to produce complex gradation effects.
Solution Approach 2:
The single coloring liquid performs multiple coloring functions simultaneously by containing metal ions with different electrode potentials. Each metal ion contributes to different aspects of the gradation effect, making the single liquid universally functional for creating complex color patterns.
3Productivity
If a single coloring liquid is used, then the process time is reduced, but the ability to form gradation is limited
Solution Approach 1:
The patent exploits parameter changes in electrode potential to enable a single coloring liquid to produce gradation effects. The metal ions with different standard electrode potentials undergo different electrochemical reactions during firing, creating natural gradation without requiring multiple application steps.
Solution Approach 2:
The coloring liquid is formulated as a composite containing multiple metal ions (such as Fe, Mn, Ni, Co, Cu, Zn, Pb, Bi, Sr, Ba, or稀土elements) with specific electrode potential differences. This composite composition enables the single liquid to achieve complex coloring outcomes that would otherwise require multiple separate liquids.
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
This method allows for the efficient formation of a gradation within dental ceramics using a single coloring liquid, reducing time and effort while achieving a natural tooth-like hue.
Implementation Method 1
The coloring liquid contains at least two types of metal ions in which a difference between standard oxidation-reduction potentials is 0.5 or more and 4.0 or less
Data Source
AI summary
A method for coloring a dental ceramic (10) includes a step of contacting a coloring liquid (30) with the dental ceramic (10). The coloring liquid (30) contains at least two types of metal ions in which a difference between standard oxidation-reduction potentials is 0.5 or more and 4.0 or less.