Isosorbide Plasticizer in Dental Impression Kits

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Solution Overview

Problem

Dental impression materials face challenges in maintaining mechanical properties and disinfection stability when alternative components are used, particularly with the substitution of dibenzyl toluene, which can affect tensile strength and dimensional accuracy.

Innovation Solution

A dental composition kit comprising a cationically curable pre-polymer with a polyether backbone and aziridine moieties, combined with an isosorbide component as a plasticizer, which maintains mechanical properties and disinfection stability without negatively impacting the hardened material.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If dibenzyl toluene is used as a plasticizer in dental impression materials, then processing and handling properties are improved, but tensile strength and dimensional stability deteriorate

Engineering Contradiction:

Improveprocessing and handling propertiesVSAvoidtensile strength and dimensional stability

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The patent applies parameter changes by substituting dibenzyl toluene with isosorbide esters, specifically changing the chemical composition parameters of the plasticizer. This substitution maintains the plasticizing function while improving mechanical properties. The isosorbide esters provide comparable processing benefits without the dimensional instability and tensile strength issues associated with dibenzyl toluene, thus resolving the contradiction between ease of operation and strength.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If alternative components are used to substitute dibenzyl toluene, then availability and cost are improved, but mechanical properties and disinfection stability worsen

Engineering Contradiction:

Improvecomponent availabilityVSAvoidmechanical properties and disinfection stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent resolves this contradiction by changing the chemical parameters of the plasticizer component from dibenzyl toluene to isosorbide esters. This substitution provides better component availability and cost-effectiveness while simultaneously maintaining or improving mechanical properties and disinfection stability, thus eliminating the trade-off between adaptability and reliability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite material principles by formulating a dental impression material system that integrates isosorbide esters with specific prepolymers (polyether, polysulfide, or silicone-based) and crosslinking agents. This composite formulation ensures that the alternative plasticizer component works synergistically with other materials to maintain reliable mechanical properties and disinfection stability, overcoming the limitations of using alternative components in isolation.

Inventive Principle:

Principle #40Composite materials

3Productivity

If the curing time is reduced for faster restoration, then productivity is improved, but the accuracy and detail reproduction of the impression worsen

Engineering Contradiction:

Improvecuring speedVSAvoidaccuracy and detail reproduction

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent addresses this contradiction by changing the chemical composition parameters of the impression material system, specifically incorporating isosorbide esters that optimize the balance between curing kinetics and material performance. This composition adjustment enables faster curing times while preserving the accuracy and detail reproduction capabilities, thus resolving the trade-off between productivity and manufacturing precision.

Inventive Principle:

Principle #35Parameter changes

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 use of isosorbide as a plasticizer in dental impression compositions ensures that mechanical properties such as tensile strength and disinfection stability are preserved, even when dibenzyl toluene is substituted, preventing dimensional instability and maintaining the accuracy of dental restorations.

Implementation Method 1

The composition also contains a component comprising an isosorbide moiety, which may act as a plasticizer.

Methodology Applied

Scientific EffectPlasticization:

Implementation Method 2

Often used are so-called polyether impression materials which cure by a cationic ring-opening polymerization of aziridines

Methodology Applied

Scientific EffectCationic ring-opening polymerization:

Data Source

PatentUS20240285476A1Dental composition comprising an isorbide component

Publication Date: 2024.08.29 SOLVENTUM INTELLECTUAL PROPERTIES CO

AI summary

The invention relates to a dental composition provided as a kit of parts comprising a base paste and an initiator paste, the base paste comprising, a cationically curable pre-polymer comprising a backbone and at least two aziridine moieties, filler, the initiator paste comprising an initiator being able to start the hardening of the polyether pre-polymer, filler, optionally diluent, the base paste or the initiator paste or the base paste and the initiator paste comprising in addition an isosorbide component. The invention also relates to a process of taking an impression of dental tissue.