Bioactive Borophosphate Glass Composition for Tissue Engineering
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Solution Overview
Problem
Conventional bioactive glasses, particularly silicate and borate-based ones, face limitations in biocompatibility and angiogenesis due to rapid boron release and potential toxicity, while phosphate-based glasses lack comprehensive studies, especially in the CaO—B2O3—P2O5 system, which requires improved degradation rates and bioactivity for tissue engineering applications.
Innovation Solution
Development of a borophosphate glass composition in the CaO—B2O3—P2O5 system with additives like Li2O, Na2O, Al2O3, ZnO, MgO, Fe2O3, CuO, TiO2, and SiO2 to control degradation rates and enhance biocompatibility and angiogenesis, incorporating Al2O3 and Na2O to improve bioactivity and cell growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If borate-based bioactive glasses are used, then glass formation and processing are improved, but rapid boron release causes toxicity and reduces biocompatibility
Solution Approach 1:
The patent extracts and removes the harmful boron component from the glass composition while retaining the beneficial borophosphate structure. By formulating a glass composition with controlled B2O3 content (0.1-80%) and combining it with phosphate (P2O5, 30-80%), the invention eliminates excessive boron release while maintaining glass-forming ability and bioactivity.
Solution Approach 2:
The patent creates a composite borophosphate glass system that combines borate and phosphate components synergistically. This composite structure allows the glass to achieve both good glass formation properties and improved biocompatibility, as the phosphate component mitigates the toxicity of boron while the boron component maintains glass-forming ability.
2Object-affected harmful factors
If phosphate-based glasses are used, then biocompatibility is improved, but degradation rates are too slow for effective tissue engineering
Solution Approach 1:
The patent changes the chemical composition parameters of the glass by incorporating specific ratios of B2O3 (0.1-80%), P2O5 (30-80%), and CaO (5-50%). This parameter optimization accelerates the degradation rate while maintaining biocompatibility, as the controlled composition allows for tuned ion release and hydroxyapatite formation rates suitable for tissue engineering.
Solution Approach 2:
The patent introduces local quality variations through the addition of specific metal oxides (Al2O3, SiO2, ZnO, MgO, Fe2O3, CuO, TiO2) that locally modify the glass network structure. These additives create regions with different degradation characteristics, allowing controlled ion release and enhanced bioactivity at the glass-tissue interface while maintaining overall biocompatibility.
3Object-affected harmful factors
If glass composition is optimized for biocompatibility, then cell proliferation is improved, but angiogenesis ability is reduced
Solution Approach 1:
The patent designs a universal glass composition that simultaneously supports multiple biological functions: cell proliferation, angiogenesis, and bone regeneration. The CaO-B2O3-P2O5 base composition with metal oxide additives creates a multi-functional material that can promote both vascularization and osteogenesis, making it suitable for complex tissue engineering applications requiring multiple simultaneous biological responses.
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 borophosphate glass compositions exhibit excellent biocompatibility and angiogenesis ability, with controlled degradation rates and improved cell proliferation, reducing toxicity concerns and enhancing tissue engineering potential.
Implementation Method 1
the addition of any of the source additives selected from the group Li2O, Na2O, K2O, Al2O3, ZnO, MgO, Fe2O3, CuO, TiO2, SiO2, or combinations thereof, can control the degradation rates or dissolution rates of glass network formers (e.g., B2O3, P2O5, and Al2O3)
Data Source
AI summary
A borophosphate glass composition including B2O3, P2O5, and CaO, and optionally a source additive selected from: Li2O, Na2O, K2O, Al2O3, ZnO, MgO, Fe2O3/FeO, CuO/Cu2O, and mixtures thereof, as defined herein. Also disclosed are bioactive compositions or substrates including the disclosed borophosphate glass composition, and at least one live cell. Also disclosed are methods of inhibiting or increasing the relative amount of species containing boron, phosphorous, or both, being released into an aqueous solution from aborophosphate glass composition defined herein. Also disclosed is a method of proliferating cells on a bioactive substrate as defined herein. Also disclosed are related glass compositions that exclude one of B2O3, P2O5, and CaO.