Resorbable PGA Fabric for Cartilage Reconstruction
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Solution Overview
Problem
Current methods for cartilage reconstruction, such as cell culture and scaffold implantation, are costly, time-consuming, and require multiple surgical procedures and post-operative therapies, leading to patient discomfort and prolonged recovery.
Innovation Solution
A resorbable device made of biocompatible PGA fabric, impregnated with collagen and fixed to the bone using resorbable screws or staples, which is immersed in patient blood to facilitate cartilage regeneration, eliminating the need for extensive cell culture and subsequent injections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell culture and scaffold implantation are used for cartilage reconstruction, then cartilage regeneration can be achieved, but the treatment becomes costly and time-consuming with multiple surgical procedures required
Solution Approach 1:
The invention extracts and eliminates the time-consuming cell culture phase from the treatment protocol. Instead of requiring separate culture procedures, the device uses the patient's own blood directly at the surgical site to provide growth factors and proteins that stimulate cartilage regeneration, thereby removing the lengthy culture step while maintaining regeneration effectiveness
Solution Approach 2:
The invention merges multiple functions into a single device: the PGA fabric serves as both the structural scaffold and the delivery vehicle for blood-derived growth factors. The device combines scaffolding, drug delivery, and hemostatic functions in one integrated component, reducing the need for multiple separate procedures
2Reliability
If cell culture and multiple infiltrations are performed, then cartilage reconstruction is completed, but patient discomfort increases and recovery is prolonged
Solution Approach 1:
The invention enables the patient's own blood to serve the regenerative function. The autologous blood provides growth factors, proteins, and cellular components that directly support cartilage regeneration at the implant site, eliminating the need for repeated hospital visits and additional injections that cause discomfort
Solution Approach 2:
The device is prepared by impregnation with the patient's blood before implantation, so that the regenerative factors are already in place when the device is inserted. This preliminary preparation ensures that regeneration begins immediately without requiring subsequent infiltration procedures
3Duration of action of stationary object
If PGA fabric is used as a resorbable scaffold, then the device can be quickly resorbed in one month, but the fabric must be sufficiently strong to maintain structural integrity during this period
Solution Approach 1:
The invention optimizes the PGA fabric parameters including thread density (50-200 denier), weave pattern, and thickness (0.3-0.6 mm) to achieve the right balance between resorption rate and structural strength. The fabric is engineered to maintain integrity for the critical first month while gradually resorbing thereafter
Solution Approach 2:
The PGA fabric is impregnated with collagen and blood-derived proteins, creating a composite structure that enhances mechanical properties during the critical early period. The combination of PGA fibers with collagen matrix provides both immediate strength and controlled resorption characteristics
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
This approach reduces recovery time and discomfort by allowing quick cartilage reconstruction within a month as the device dissolves, utilizing the patient's own blood and proteins for tissue regeneration, thus avoiding lengthy and costly cell culture processes.
Implementation Method 1
The piece is impregnated with collagen. The piece is first immersed in the blood of the patient himself
Implementation Method 2
PGA is a highly biocompatible and resorbable polymer. In detail, the resorption time of PGA is approximately one month
Data Source
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AI summary
A resorbable device for the reconstruction of cartilage comprises a piece of fabric (2) made of PGA, which can be impregnated with patient blood and fixable to a bone (O) at an articulation, said piece (2) preferably being impregnated with collagen.