Zinc-Oxide Eugenol Cement Remover Composition

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Solution Overview

Problem

Current methods for removing zinc-oxide eugenol (ZOE)-based temporary dental cements are inadequate, as they leave residual cement on surfaces, are toxic, and require special disposal, hindering the bonding of permanent resin cements to collagen-containing surfaces and complicating root canal treatments.

Innovation Solution

Compositions comprising essential oils, aliphatic esters, cyclic esters, and quaternary ammonium salts are used to chemically dissolve ZOE-containing cements from surfaces, both inside and outside the oral cavity, while also strengthening the resin-dentin bond and safely removing root canal filling materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If harsh inorganic bases are used to remove temporary cement, then cement removal effectiveness is improved, but toxicity increases and special disposal procedures are required

Engineering Contradiction:

Improvecement removal effectivenessVSAvoidtoxicity

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters of the cement remover from harsh inorganic bases to a combination of organic solvents (acetone, ethanol, isopropanol) and mild surfactants, maintaining removal effectiveness while eliminating toxicity and disposal requirements

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs common, inexpensive, and biodegradable solvents and surfactants that can be safely disposed of without special procedures, replacing the need for hazardous chemical handling and disposal systems

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Reliability

If eugenol-containing temporary cement is used, then short-term marginal sealing is improved, but polymerization of permanent resin cement is inhibited

Engineering Contradiction:

Improvemarginal sealingVSAvoidbonding ability of permanent resin

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent applies a specific solvent composition to the tooth surface before applying the permanent resin cement, completely removing residual eugenol from the temporary cement to prevent it from inhibiting the polymerization of the permanent resin

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses acetone, ethanol, and isopropanol as intermediary substances to dissolve and remove eugenol from the dentin surface, creating a clean interface that allows optimal bonding between the permanent resin cement and tooth structure

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If mechanical instrumentation with reamer or file is used to remove root canal materials, then removal capability is improved, but treatment time increases and materials remain trapped

Engineering Contradiction:

Improveremoval capabilityVSAvoidtreatment time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent replaces mechanical instrumentation (reamers and files) with a chemical dissolution system using organic solvents that can penetrate and dissolve gutta-percha and cement sealers, enabling complete removal without prolonged mechanical manipulation

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes liquid flow dynamics to deliver the solvent composition into the root canal system, allowing the chemical solution to penetrate deep into canal complexities and carry dissolved materials out, replacing the need for mechanical evacuation

Inventive Principle:

Principle #29Pneumatics and hydraulics

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 compositions effectively and safely remove ZOE-based temporary cements and root canal filling materials, enhancing the adhesion of acrylate resin cements to collagen-containing surfaces without the need for toxic chemicals or special disposal, improving the success of dental procedures.

Implementation Method 1

compositions comprising essential oils, aliphatic esters, cyclic esters, and quaternary ammonium salts are used to chemically dissolve ZOE-containing cements from surfaces

Methodology Applied

Scientific EffectSolvation: Solvation

Implementation Method 2

these compositions can also strengthen the resin-dentin bond between permanent cements and collagen-containing surfaces. Importantly, all of the compositions described herein are non-toxic, can be used inside the oral cavity, and do not require special disposal procedures

Methodology Applied

Scientific EffectChemical dissolution: Solvation

Data Source

PatentUS9757209B2Compositions and methods for dental applications involving zinc-oxide cements

Publication Date: 2017.09.12 ESSENTIAL DENTAL SYSTEMS INC

AI summary

Described are compositions and methods for the removal of zinc-oxide eugenol-based temporary cements or root canal filling materials from a variety of surfaces including surfaces inside the oral cavity, such as teeth, as well as surfaces of objects located outside of the oral cavity, such as instruments and prostheses. In certain compositions, the resin-dentin bond between permanent cements and collagen-containing surfaces can be increased. The compositions are non-toxic, can be used inside the oral cavity, and do not require special disposal procedures.