Dual-Cure Dental Composition for Viscosity Control
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Solution Overview
Problem
Current dental impression and retraction processes require separate materials and steps, making them time-consuming and inefficient, as existing compositions do not allow for adjustable viscosity on demand.
Innovation Solution
A curable composition comprising a resin matrix with cationically curable and radiation curable components, a starter, and a photo-initiator, which can be separated into Base and Catalyst Parts, allowing for adjustable viscosity through radiation exposure, enabling both dental impression and retraction with a single material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single composition is used for both dental retraction and impression, then the number of materials and steps is reduced, but the viscosity control becomes more complex
Solution Approach 1:
The composition enables dynamic viscosity control through radiation exposure. The material transitions from a flowable state (for impression taking) to a stiffened state (for retraction) by controlling the extent of radiation curing, allowing one material to adapt to different functional requirements during the dental procedure
Solution Approach 2:
The patent changes the physical state parameter (viscosity) of the composition by controlling the radiation curing degree. Partial radiation exposure increases viscosity for retraction function, while leaving portions uncured maintains low viscosity for impression flow, enabling multifunctionality through parameter modulation
2Adaptability or versatility
If radiation curable components are added to enable viscosity adjustment, then viscosity control on demand is achieved, but the composition complexity increases
Solution Approach 1:
The composition is designed to perform multiple functions: it serves as both a retraction material (when radiation-stiffened) and an impression material (when flowable). The dual-curability system enables one composition to replace what would traditionally require separate materials for retraction and impression
Solution Approach 2:
The patent creates a composite curable composition containing both cationically curable components (for final setting) and radiation curable components (for intermediate viscosity control). This composite approach allows independent control of different curing mechanisms to achieve desired rheological properties at different stages
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 efficient and simplified dental impression and retraction by allowing the composition to switch between high and low viscosity modes on demand, reducing the need for multiple materials and steps, and preventing the formation of unwanted smear layers.
Implementation Method 1
a photo-initiator system which comprises a photoinitiator and an accelerator, wherein the photoinitiator is selected from the group consisting of: (a) alpha-diketon compounds, (b) phosphine oxide compounds, (c) combinations or mixtures of (a) and (b)
Implementation Method 2
a resin matrix comprising cationically curable components (A) and radiation curable components (B), a curing system, the curing system comprising a starter (A-S) suitable for curing the cationically curable components (A)
Data Source
AI summary
The invention relates to a curable composition comprising a resin matrix, the resin matrix comprising cationically curable components (A) and radiation curable components (B), a curing system, the curing system comprising a starter (A-S) suitable for curing the cationically curable components (A) and a photo-initiator (B-I), the curable composition being provided as a Base Part and Catalyst Part being separated before use, wherein the Base Part comprises components (A) and (B) and wherein the Catalyst Part comprises components (A-S) and (B-I). The composition can be used for taking a dental impression including the subgingival parts.