Crosslinked Soft Tissue Grafts Resisting Enzymatic Degradation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing soft tissue grafts are prone to enzymatic degradation and stretching under tension, and they often inhibit cellular infiltration and remodeling due to excessive crosslinking, leading to foreign body responses and failure over time.
Innovation Solution
Crosslinked soft tissue grafts with a controlled degree of crosslinking using biocompatible agents like di-epoxide (BDDE) to form flexible bridges, maintaining large pore sizes for cellular infiltration while providing enzymatic resistance, using a method that includes decellularization, incubation with a crosslinking agent, rinsing, and optional plasticization and sterilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If soft tissue grafts are heavily crosslinked to resist enzymatic degradation, then enzymatic resistance is improved, but cellular infiltration is inhibited and foreign body responses occur
Solution Approach 1:
The patent applies parameter changes by carefully controlling the crosslinking degree through specific crosslinking agents (BDDE, EDC, glutaraldehyde) and conditions to achieve optimal balance. The crosslinking density is adjusted to provide sufficient enzymatic resistance while maintaining pore structure for cellular infiltration, thereby reducing foreign body responses.
Solution Approach 2:
The patent creates composite material structures by combining crosslinked collagen matrices with controlled pore architectures. The crosslinked network provides enzymatic resistance while the porous composite structure maintains biocompatibility and facilitates cell migration, resolving the contradiction between strength and biological integration.
2Strength
If soft tissue grafts are crosslinked to provide structural stability, then stretching resistance is improved, but flexibility and cellular remodeling are reduced
Solution Approach 1:
The patent utilizes parameter changes by optimizing crosslinking density and selecting specific crosslinking agents that provide adequate structural stability while preserving flexibility. The controlled crosslinking parameters allow the graft to resist stretching forces yet remain adaptable for cellular remodeling and tissue integration.
3Object-generated harmful factors
If soft tissue grafts are minimally crosslinked to maintain cellular infiltration, then biocompatibility is improved, but enzymatic degradation increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the degree and type of crosslinking to achieve the minimum necessary for enzymatic resistance while maximizing biocompatibility. Specific crosslinking agents and controlled incubation conditions ensure sufficient durability without compromising cellular infiltration and tissue integration.
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 crosslinked grafts exhibit enhanced resistance to enzymatic degradation and stretching, maintaining cellular infiltration and biocompatibility, with improved stability and integration in tissue defects, such as hernia repair, without eliciting an inflammatory response.
Implementation Method 1
Crosslinked soft tissue grafts with a controlled degree of crosslinking using biocompatible agents like di-epoxide (BDDE) to form flexible bridges
Data Source
AI summary
The invention relates to crosslinked soft tissue grafts and methods of use thereof. The invention also relates to methods of preparing the same.