Dental Prosthesis Composite Block With Transmittance Gradient
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Solution Overview
Problem
Existing dental prosthetic materials face challenges in achieving quick processing, esthetic simulation of natural teeth, and functional restoration, with issues such as long manufacturing times, low machinability, and esthetically unnatural appearances.
Innovation Solution
A composite bulk block comprising a glass ceramic matrix with a polymer, featuring a gradient in transmittance and biaxial flexural strength, and a multilayer structure with varying particle sizes and coloring agent content to simulate natural tooth properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If ceramic materials are used for dental prostheses, then esthetics and properties are improved, but machinability deteriorates and chipping occurs in margin portions
Solution Approach 1:
The invention uses a composite material consisting of crystallized glass particles dispersed in a polymer matrix. This composite structure combines the esthetic properties and strength of ceramic materials with the machinability and toughness of polymer materials, preventing chipping while enabling easy machining.
2Strength
If crystallized glass is used for dental prostheses, then esthetics are improved, but manufacturing time increases due to required heat treatment
Solution Approach 1:
The crystallized glass particles are pre-formed and dispersed in the polymer matrix before final processing. This preliminary preparation of the ceramic phase eliminates the need for post-machining heat treatment, enabling one-day prosthesis manufacturing while maintaining esthetic properties.
3Stability of the object's composition
If polymer is added to suppress brittleness of inorganic component, then toughness is improved, but strength decreases
Solution Approach 1:
The invention optimizes the polymer content to 20-40 wt% of the total composite. This specific parameter range balances the competing requirements: sufficient polymer to suppress brittleness and improve toughness, but not so much that it significantly compromises the strength provided by the crystallized glass particles.
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 processing into esthetic and functional restorations that closely resemble natural teeth, with improved machinability and esthetic reproducibility.
Implementation Method 1
a first infiltration step of primarily infiltrating a polymer into the ceramic porous body in a vacuum state by loading the ceramic porous body into a vacuum chamber
Data Source
AI summary
Disclosed in the present invention is a composite bulk block for manufacturing a dental prosthesis, in which a glass ceramic matrix is composed of an amorphous glass matrix and a crystaliine phase dipersed in the glass matrix, the crystaliine phase including, as the main crystaliine phase, at least one selected from a lucite crystaliine and lithium disilicate crystaliine phase, and polymer is included in an amount of 20-40 wt% with respect to the weigth of the entire bulk block, and the composite bulk block has a gradient of a light transmittance along the depth direction and has an interface at change point of the light transmittance gradient value. Thus, the composite bulk block for manufacturing a dental prosthesis is provided which enables quick and easy processing of an aesthetic and functoinal restoration while simulating a natural teeth.