Bioactive Borate Glass Dental Adhesive Resin Bonding
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Solution Overview
Problem
Current dental adhesives face challenges in bonding resin or ceramic materials to dental hard tissues like enamel and dentin due to compositional differences, and existing solutions are not durable enough to withstand the oral environment's acidic, bacterial, thermal, and mechanical stresses.
Innovation Solution
A bioactive borate glass adhesive system comprising silanated bioactive glass particles and a biocompatible resin blend, which deposits calcium and phosphate ions to form hydroxyapatite, enhancing bonding and re-mineralizing the tooth structure, is developed. This system is free of phosphoric acid and certain inorganic components, and is designed to be compatible with dental restoratives for improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If resin materials are used for dental restoratives, then esthetic and coating functions are improved, but bonding durability to dental hard tissues deteriorates due to compositional differences
Solution Approach 1:
The adhesive composition combines organic resin components (for esthetics and coating) with inorganic bioactive glass particles (for bonding durability and chemical compatibility with hydroxyapatite). This composite structure allows the material to simultaneously provide the esthetic properties of resins and the bonding reliability of inorganic materials that chemically match dental hard tissues.
Solution Approach 2:
The bioactive glass particles act as an intermediary between the organic resin and the inorganic hydroxyapatite in dental hard tissues. The glass particles form chemical bonds with the tooth structure while the resin matrix provides the bonding interface, bridging the compositional gap between organic and inorganic materials.
2Reliability
If ceramic materials are used for dental restoratives, then durability and inertness are improved, but bonding to dental hard tissues deteriorates due to high stability and inertness
Solution Approach 1:
The adhesive composition with bioactive glass particles serves as an intermediary layer between the inert ceramic restorative and the dental hard tissue. The bioactive glass chemically bonds to both the ceramic surface and the tooth structure, overcoming the inertness barrier and enabling reliable bonding.
Solution Approach 2:
The adhesive modifies the chemical parameters at the interface by introducing bioactive glass particles that can chemically interact with both ceramic surfaces and dental hard tissues, changing the bonding mechanism from mechanical to chemical bonding across the interface.
3Ease of operation
If conventional adhesives are used to bond restoratives, then initial bonding is achieved, but long-term durability deteriorates under acidic, bacterial, thermal, and mechanical challenges
Solution Approach 1:
The bioactive glass particles in the adhesive continuously release calcium and phosphate ions in the oral environment, enabling self-repair and reinforcement of the bonding interface over time. This self-service mechanism actively maintains and improves bonding durability under challenging oral conditions rather than passively degrading.
Solution Approach 2:
The adhesive composition is pre-formulated with bioactive glass particles that provide protective cushioning against future degradation from acidic, bacterial, thermal, and mechanical challenges. The glass particles create a buffer zone that resists environmental attacks before they can reach and damage the resin-tooth interface.
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 bioactive borate glass adhesive system provides long-term, permanent re-mineralization and desensitization of dentin, enhancing the durability of the resin-tooth interface and resisting acidic attacks, while ensuring effective bonding of dental composites to enamel and dentin surfaces.
Implementation Method 1
the adhesive system deposits calcium and phosphate ions to form hydroxyapatite
Implementation Method 2
deposits calcium and phosphate ions to form hydroxyapatite, a putative mineral in enamel and dentin
Implementation Method 3
silanated bioactive glass particles
Data Source
AI summary
A bioactive borate glass adhesive system is described for its composition and use in adhering a plurality of dental restorative components onto a tooth surface. The adhesive system comprises silanated borate bioactive glass particles and a biocompatible resin blend. The bioactive adhesive system functions as a non-degradable, permanent adhesive in tooth restoration in the presence of saliva. In addition, the bioactive borate adhesive system may be used for re-mineralization, de-sensitization and self-healing of dentin and enamel by releasing and depositing calcium and phosphate ions onto the exposed and damaged tooth surface.