Flowable Bone Void Filler Using Polysaccharide-Ceramic Composites
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Solution Overview
Problem
Current bone repair materials face limitations such as donor site morbidity, immunogenic responses, high resorption rates, and inadequate stability, workability, and cohesiveness, making them unsuitable for all circumstances.
Innovation Solution
A composition comprising polysaccharide excipients, such as alginates, combined with ceramic granules, which forms a moldable and adaptable flowable paste or putty, potentially including growth factors, to fill osseous voids and promote bone fusion, offering increased cohesiveness and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If synthetic materials are used to avoid donor site morbidity and immunogenic responses, then availability and safety are improved, but workability, handling, and setting parameters become unacceptable
Solution Approach 1:
The invention combines synthetic ceramic particles (providing safety and availability) with natural polysaccharide excipients like alginate (providing workability and handling properties). This composite approach allows the material to exhibit both the safety advantages of synthetic materials and the operational advantages of natural materials, resolving the contradiction between reliability and ease of operation.
2Reliability
If synthetic materials are used to avoid immunogenic responses, then safety is improved, but the ability to impart adequate stability deteriorates
Solution Approach 1:
The composite formulation combines synthetic ceramic particles with natural polysaccharide excipients, where the polysaccharide matrix provides structural stability and mechanical strength while the ceramic particles provide safety and osteoconductivity. This synergy resolves the contradiction between safety and stability.
Solution Approach 2:
The invention adjusts physical and chemical parameters including particle size distribution, ceramic-to-polysaccharide ratios, and crosslinking density to optimize both safety and stability properties simultaneously, demonstrating how parameter optimization can resolve contradictory requirements.
3Ease of operation
If the composition is made moldable and adaptable, then ease of operation is improved, but rapid absorption may occur reducing duration of action
Solution Approach 1:
The invention carefully controls the molecular weight, degree of polymerization, and crosslinking of the polysaccharide excipient to achieve a balance between moldability (requiring flexibility and flow) and stability (requiring structural integrity and resistance to rapid degradation). This parameter optimization resolves the contradiction between ease of operation and duration of action.
Data Source
AI summary
The present invention provides a composition that may be used as an implant or a bone graft substitute or extender for filling voids and/or promoting fusion of osseous tissues. The implant may comprise ceramic granules such as calcium phosphate granules and one or more polysaccharide excipients, and may be in the form of a putty or flowable paste. Optionally, the implant may also comprise a growth factor such as a bone morphogenetic protein.