Porous Bioabsorbable Scaffold for Vascularized Tissue Regeneration
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Solution Overview
Problem
Existing tissue engineering methods and devices fail to provide adequate vascular support and integration for large volumes of tissue, leading to issues such as tissue necrosis and capsular contracture in breast reconstruction and augmentation procedures, and have not successfully promoted self-organizing properties of healing tissues.
Innovation Solution
A scaffold made of porous, absorbable material with tissue engineering chambers arranged radially around a core, designed to accommodate blood vessels and promote vascularization, using materials like Poly-4-Hydroxybutyrate (P4HB) to provide physical support and facilitate the growth of capillaries, allowing for the integration of autologous fat and stem cells to create vascularized living tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional breast implants (saline-filled or silicone gel-filled) are used, then breast reconstruction and augmentation can be achieved, but tissue necrosis and capsular contracture frequently occur
Solution Approach 1:
The patent employs a porous biodegradable polymer scaffold that allows tissue ingrowth and vascularization. The porous structure enables capillary penetration and integration with host tissue, eliminating the encapsulation and necrosis problems associated with traditional solid implants. The scaffold degrades over time as native tissue replaces it, ensuring long-term tissue health.
Solution Approach 2:
The scaffold is designed to self-degrade through hydrolysis of ester bonds in the polymer structure. As the scaffold degrades, it is gradually replaced by host tissue without requiring surgical removal. This self-service approach eliminates the need for secondary procedures and ensures continuous tissue health maintenance.
2Reliability
If the BioZorb implant with rigid bioabsorbable body and non-contiguous external perimeter is used, then the device is bioabsorbable, but it does not fill the surgical defect adequately and does not achieve consistent aesthetic appearance
Solution Approach 1:
The scaffold uses a porous foam structure that provides contiguous surface area coverage while maintaining bioabsorbability. The porous architecture allows the scaffold to conform to and fill irregular surgical defects completely, providing consistent aesthetic appearance while degrading over time.
Solution Approach 2:
The patent combines biodegradable polymer materials with specific foam structures to create a composite scaffold that maintains structural integrity during the healing process while providing complete defect filling. The composite structure ensures both aesthetic appearance and gradual bioabsorption.
3Reliability
If the BioZorb implant is used in smaller breasted, thin women, then the device is bioabsorbable, but it does not adequately stent the defect and does not promote gradual healing without scar contracture
Solution Approach 1:
The porous foam scaffold provides distributed structural support through its three-dimensional architecture. The porous structure allows tissue ingrowth while maintaining defect stenting, preventing scar contracture by distributing mechanical loads across the entire defect area rather than concentrating stress at specific points.
4Reliability
If structures are used to provide volume expansion and distractive forces for fat grafting, then vascular density of injected fat can be increased, but the structures must be removed after the surgical procedure
Solution Approach 1:
The scaffold is designed to self-degrade through hydrolytic breakdown of ester bonds in the polymer chains. As the scaffold degrades over months, it is gradually replaced by host tissue and vascular structures, eliminating the need for surgical removal while maintaining fat graft survival through sustained volume expansion and vascularization support.
5Volume of stationary object
If large volumes of tissue are engineered without adequate vascular support, then tissue volume can be achieved, but tissue necrosis occurs
Solution Approach 1:
The porous foam scaffold provides extensive surface area and interconnected pores that facilitate capillary ingrowth throughout the entire tissue volume. The porous architecture ensures that vascular structures can penetrate deep into large tissue volumes, maintaining tissue viability through adequate oxygen and nutrient supply while supporting significant tissue expansion.
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 scaffold enables the creation of healthy, vascularized tissue with enhanced adipogenesis, reducing the risk of necrosis and capsular contracture, while promoting gradual healing and aesthetic outcomes in breast reconstruction and augmentation procedures, and can be used for various organ regeneration and supplementation.
Implementation Method 1
A scaffold made of porous, absorbable material with tissue engineering chambers arranged radially around a core
Implementation Method 2
absorbable material as used herein means a material broken down and gradually absorbed, excreted or eliminated by the body whether the degradation is due to hydrolysis or metabolic processes
Data Source
AI summary
Tissue engineering devices and methods employing scaffolds made of absorbable material for use in the human body for tissue genesis and regenerative and cellular medicine including breast reconstruction and cosmetic and aesthetic procedures and supplementing organ function in vivo.