Light-Curable Hemostatic Paste for Dental Bleeding Control

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Solution Overview

Problem

Current hemostatic compounds used in dental procedures often have low viscosity, causing them to flow away from the application site and fail to maintain effective hemostasis for a desired period, especially during procedures like dental crown cementing and sulcular bleeding.

Innovation Solution

A light-curable hemostatic paste comprising (2-hydroxypropyl)-β-cyclodextrin as the hemostatic component, combined with a light-curable component such as methacrylate ester monomers, which can be selectively hardened upon demand using light, providing a semi-hardened barrier to control bleeding and maintain positioning on the gum.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional hemostatic compounds are used, then hemostatic function is provided, but viscosity is too low causing the compound to flow away from the application site

Engineering Contradiction:

Improvehemostatic functionVSAvoidviscosity

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent combines a hemostatic compound with a light-curable resin to create a composite material. The hemostatic compound provides bleeding control functionality while the light-curable resin increases viscosity and enables positional stability through light-induced hardening, resolving the contradiction between maintaining hemostatic function and achieving sufficient viscosity.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the physical state of the hemostatic compound from a low-viscosity liquid to a high-viscosity paste by incorporating light-curable resin. This parameter change in viscosity allows the compound to remain at the application site, while the light-curable component enables controlled hardening to maintain position throughout the procedure.

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If hemostatic compound viscosity is increased to prevent flowing, then positioning stability improves, but the compound may become too thick for proper application

Engineering Contradiction:

Improvepositioning stabilityVSAvoidapplication ease

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The patent creates a dynamic material system that transitions from a flowable state during application to a stable state during use. The light-curable component allows the compound to be applied in a softer, more workable state, then hardened with light exposure to achieve positioning stability, resolving the contradiction between application ease and positioning stability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies the hemostatic compound in a soft, application-friendly state first, allowing easy placement and shaping. Subsequently, light is applied to cure the resin and harden the compound in its final positioned state, achieving both ease of application and positioning stability through sequential actions.

Inventive Principle:

Principle #10Preliminary action

3Stability of the object's composition

If light-curable component is added to increase viscosity, then positioning stability improves, but procedure time increases due to light curing step

Engineering Contradiction:

Improvepositioning stabilityVSAvoidprocedure time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The patent replaces mechanical mixing or heating methods with light curing to achieve hardening. Light curing provides rapid, controlled hardening without the time-consuming processes of traditional setting methods, and can be applied locally only where needed, reducing overall procedure time while maintaining positioning stability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses periodic or pulsed light application to cure the hemostatic compound. This allows controlled hardening in stages or localized areas, optimizing the balance between achieving positioning stability and minimizing the time required for the curing process.

Inventive Principle:

Principle #19Periodic action

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 light-curable hemostatic paste effectively stays positioned on the gum, controlling bleeding and serving as a hemostatic barrier during dental procedures, allowing for easy removal and minimizing adherence to tissues, thus enhancing hemostasis and procedural efficiency.

Implementation Method 1

a light-curable component; wherein the hemostatic component comprises (2-hydroxypropyl)-β-cyclodextrin

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation

Data Source

PatentUS20200330203A1Hemostatic paste with light-curable feature

Publication Date: 2020.10.22 DAHL III NORMAN F

AI summary

A hemostatic paste comprising: a hemostatic component; and a light-curable component; wherein the hemostatic component comprises (2-hydroxypropyl)-Y-cyclodextrin.