Hardenable Dental Material Reflectivity Scanner Accuracy
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Solution Overview
Problem
Current hardenable dental materials lack visual readability in their hardened state, making it difficult to detect deficiencies with the naked eye, and reflective surfaces necessary for improved visibility also cause issues with dental scanners, resulting in poor image reproduction.
Innovation Solution
A hardenable dental material with a reflectivity of more than 50% in the hardened state, achieved by incorporating metal or metal alloy particles, which enhances visual readability but introduces challenges with dental scanner compatibility due to reflective surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If reflective surfaces are added to enhance visual readability, then visual inspection capability is improved, but dental scanner accuracy deteriorates due to light reflection interference
Solution Approach 1:
The patent applies different surface properties to different parts of the dental material. The bulk material maintains its original non-reflective properties for scanner compatibility, while a specific surface layer is treated to be reflective for visual inspection. This local differentiation resolves the contradiction by assigning different optical qualities to different spatial locations within the same material system.
Solution Approach 2:
The patent creates a composite structure combining a base dental material with a reflective surface layer. This composite approach allows the material to simultaneously possess the scanning-friendly properties of the base material and the visually-readable properties of the reflective coating, thus resolving the contradiction between scanner accuracy and visual readability.
2Illumination intensity
If metal or metal alloy particles are incorporated to increase reflectivity, then visual inspection becomes easier, but the material compatibility and toxicological safety become more challenging
Solution Approach 1:
The patent systematically varies parameters including metal particle type (aluminum, titanium, zinc oxide), particle size (0.1-10 μm), and concentration (0.1-5 wt%) to achieve the desired reflectivity while maintaining biocompatibility. This parameter optimization allows the material to reach sufficient visual readability without compromising safety or compatibility.
Solution Approach 2:
The patent uses inert, biocompatible metal particles that are safe for dental applications despite their reflective properties. These particles are selected specifically for their low toxicity and compatibility with oral tissues, allowing the material to achieve enhanced visual readability without sacrificing reliability or patient safety.
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 high reflectivity and metallic shine significantly improve visual inspection readability while causing issues with dental scanner accuracy, necessitating a balance between visual and scanner readability.
Implementation Method 1
the hardenable dental material may comprise or consist of metal or metal alloy particles wherein the hardenable dental material exhibits a reflectivity in the hardened state of more than 50%
Data Source
AI summary
A hardenable dental material, exhibiting a reflectivity in the hardened state of preferably more than about 70%, measured according to EN ISO 2813 (1999) with an angle of incidence of 60°. The material provides for improved visual readability in the hardened state.