Denture Adhesive Composition Using Cross-linked Poly(acrylic) Acid and CMC
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current denture adhesives face challenges in achieving quick adhesion development, high bite force, all-day retention, irritation reduction, pleasant taste, and cost-effectiveness, while also being easy to dispense and remove without leaving residues or trapping food, and they often contain undesirable components like zinc.
Innovation Solution
A denture adhesive composition combining a cross-linked poly(acrylic) acid polymer with a carboxymethylcellulose component and an adherence promoting component, such as sodium alginate or poly(ethylene) oxide, which is free of alkyl vinyl ether-maleic copolymers and zinc, optimizing adhesive strength, viscosity, and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional denture adhesives use synthetic polymers like MA/MVE copolymer for strong adhesion, then adhesive strength is improved, but dispensing viscosity becomes too high and removal becomes difficult
Solution Approach 1:
The patent combines natural polymers (karaya gum, tragacanth, acacia, pectin) with synthetic polymers (Polyox, sodium carboxymethylcellulose) to create a composite adhesive system. This composite approach allows the natural polymers to provide good dispensing characteristics while the synthetic components contribute adhesive strength, resolving the contradiction between strong adhesion and easy dispensing.
Solution Approach 2:
The patent modifies the chemical composition parameters by replacing traditional MA/MVE copolymer with a specific combination of natural and synthetic polymers in optimized ratios. By changing the polymer types and their concentrations, the formulation achieves both adequate adhesive strength and improved dispensing viscosity characteristics.
2Strength
If poly(vinyl acetate) is used for very strong hold lasting several days, then adhesive strength is improved, but the adhesive becomes hard to squeeze out of the tube and difficult to remove
Solution Approach 1:
The patent creates a composite system combining natural gums with synthetic polymers like Polyox and sodium carboxymethylcellulose. This composite structure provides sustained adhesive strength through the synthetic components while the natural polymers ensure easier removal properties and better dispensing characteristics, avoiding the extreme hardness and difficulty of removal associated with pure poly(vinyl acetate).
3Speed
If denture adhesive is designed for quick adhesion development, then adhesion speed is improved, but retention duration may be reduced
Solution Approach 1:
The patent formulates a continuous-action adhesive system where natural polymers provide initial rapid adhesion upon contact with saliva, while synthetic polymers like Polyox and sodium carboxymethylcellulose continue to hydrate and swell over time, maintaining and even enhancing adhesive strength throughout the day. This continuous action ensures both quick initial bonding and sustained long-term retention.
4Reliability
If zinc is added to denture adhesive for improved performance, then adhesive properties are enhanced, but harmful effects increase
Solution Approach 1:
The patent explicitly removes zinc and other potentially harmful metal ions from the adhesive formulation. Instead, it relies on the inherent adhesive properties of natural and synthetic polymers to achieve effective denture retention without the harmful effects associated with zinc-containing products.
Solution Approach 2:
The patent employs biocompatible, biodegradable natural polymers and safe synthetic alternatives that provide effective adhesive performance without requiring harmful additives like zinc. These materials are designed to be safe for prolonged contact with oral tissues, eliminating the need for toxic components.
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 composition provides improved adhesive properties with rapid adhesion development, sustained retention, reduced irritation, and a pleasant taste, while being easy to dispense and remove, and is cost-effective, addressing the limitations of existing denture adhesives.
Implementation Method 1
Denture adhesives work by swelling in the presence of saliva and becoming viscous and sticky as water is absorbed
Implementation Method 2
Denture adhesives work by swelling in the presence of saliva and becoming viscous and sticky as water is absorbed
Implementation Method 3
an adherence promoting component
Data Source
AI summary
The disclosed technology provides improved adhesive composition of use with dentures. These improved compositions include (a) a cross linked poly(acrylic) acid polymer, in combination with (b) a carbomethylcellulose (CMC) component and/or (c) an adherence promoting component. The compositions balance the many competing goals for effective denture adhesives, including adhesive strength and dispensing viscosity, without the need for zinc.