Compressed Bone Implants via Freeze-Drying for Structural Integrity
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Solution Overview
Problem
Current methods for preparing bone implants lack superior wet and dry handling characteristics and fail to provide an optimal environment for bioactive molecule attachment and bone healing, particularly in terms of maintaining structural integrity in liquids and promoting osteoinduction.
Innovation Solution
The method involves loading bone particles or fibers into a mold with a predetermined shape, applying pressure between 0.1 to 30 MPa, and freeze-drying the compressed bone compositions to create implants with microfibers having an average length-to-width ratio greater than 2, which are designed based on 3D medical imaging measurements for individualized fit and do not use binders or chemical cross-linkers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If bone particles and fibers are compressed into molds and freeze-dried, then structural integrity in liquids is improved, but handling characteristics in wet and dry states deteriorate
Solution Approach 1:
The patent applies parameter changes by controlling the compression pressure (0.1 to 30 MPa) and freeze-drying conditions to optimize the balance between structural integrity and handling characteristics. By adjusting these parameters, the bone composition maintains stability in liquids while improving ease of handling during processing and implantation.
2Strength
If binders or chemical cross-linkers are used, then structural strength is improved, but biocompatibility and osteoinduction deteriorate
Solution Approach 1:
The patent extracts and eliminates binders and chemical cross-linkers from the bone composition formulation. Instead, it relies on the natural structural properties of compressed and freeze-dried bone particles and fibers to provide structural strength, thereby maintaining biocompatibility and osteoinduction without compromising integrity.
Solution Approach 2:
The patent changes the physical state and structural parameters of bone particles through compression and freeze-drying processes to achieve sufficient structural strength without requiring binders or chemical cross-linkers, thus preserving biocompatibility and osteoinductive properties.
3Ease of manufacture
If conventional bone processing methods are used, then manufacturing simplicity is maintained, but osteoinduction and bone healing promotion deteriorate
Solution Approach 1:
The patent optimizes manufacturing parameters including compression pressure (0.1 to 30 MPa), freeze-drying conditions, and particle size distribution to enhance osteoinduction and bone healing promotion while maintaining relatively simple processing steps. The method preserves natural bone composition and bioactive molecules that facilitate healing.
Solution Approach 2:
The patent utilizes phase transitions during freeze-drying to create a porous structure that enhances osteoinduction and bone healing while maintaining manufacturing simplicity. The transition from frozen to dried state preserves bioactive molecules and creates favorable microarchitecture for bone regeneration.
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 resulting bone implants maintain integrity in liquids for extended periods, enhance bioactive factor retention, and promote osteoinduction, as demonstrated by improved cell growth and bone formation, with customized shapes fitting specific bone structures for enhanced therapeutic efficacy.
Implementation Method 1
applying pressure to the particles and/or fibers
Implementation Method 2
freeze drying the compressed bone particles and/or fibers
Data Source
AI summary
The present disclosure relates to compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of preparing compressed bone compositions, bone implants, and variants thereof. The present disclosure also relates to methods of using the bone compositions, bone implants and variants thereof.