Biodegradable Polymer-Magnesium Scaffold for TMJ Tissue Regeneration
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Solution Overview
Problem
Current solutions for temporomandibular joint disorder (TMJD) are inadequate, as they fail to effectively regenerate the avascular environment of the temporomandibular joint, leading to limited surgical interventions and low patient satisfaction due to the inability to regenerate fibrocartilage and bone tissue.
Innovation Solution
A biodegradable and biocompatible composite material comprising poly(glycerol sebacate) polymer and magnesium is used to create a medical implant device that promotes the growth and regeneration of fibrochondrocyte and chondrocyte cells, effectively restoring the bone and cartilage interface of the mandibular condyle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional surgical interventions (arthroscopy, arthroplasty) are performed to treat TMJD, then joint function may be temporarily improved, but the avascular environment prevents regeneration of fibrocartilage and bone tissue, leading to low patient satisfaction and need for multiple procedures
Solution Approach 1:
The patent uses a biodegradable polymer scaffold as an intermediary carrier to deliver magnesium ions and growth factors to the TMJ defect site. This scaffold mediates the regeneration process by providing structural support while gradually degrading, allowing native cells to infiltrate and form new tissue without requiring permanent implants or multiple surgeries
Solution Approach 2:
The patent changes the chemical and physical parameters of the implant material by using a biodegradable polymer composite that releases magnesium ions over time. The degradation rate of the polymer and the release rate of magnesium are controlled to match the tissue regeneration timeline, transforming the static implant into a dynamic system that evolves as healing progresses
2Strength
If permanent prosthetics are used to replace damaged joint structures, then mechanical function is restored, but complications arise and revision surgeries are required
Solution Approach 1:
The biodegradable scaffold performs self-service by automatically degrading as new tissue forms, eliminating the need for removal surgery. The material serves its structural function during healing then self-dissipates, allowing the regenerated tissue to take over the mechanical load-bearing function without requiring permanent implants or follow-up surgical interventions
Solution Approach 2:
The patent applies the principle of discarding the temporary scaffold structure once its purpose is fulfilled. As the polymer degrades and magnesium is released, the scaffold is gradually discarded while the regenerated native tissue recovers and assumes the mechanical function, avoiding the complications associated with permanent prosthetics
3Duration of action of stationary object
If the implant material remains permanent, then structural support is maintained, but surgery is required to remove the device when no longer needed
Solution Approach 1:
The patent employs a disposable, biodegradable polymer scaffold that provides temporary structural support during the critical healing period. The scaffold is designed to degrade completely within the treatment timeline, eliminating the need for removal surgery and associated costs, while still providing adequate mechanical support when needed
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 composite material facilitates simultaneous healing of bone and cartilage, reducing the need for revision surgeries and avoiding complications associated with prosthetics, by providing a scaffold that degrades naturally, promoting native tissue regeneration and restoring the joint to its native properties.
Implementation Method 1
A biodegradable and biocompatible composite material comprising poly(glycerol sebacate) polymer and magnesium is used to create a medical implant device that promotes the growth and regeneration of fibrochondrocyte and chondrocyte cells
Data Source
AI summary
The invention relates to biodegradable, biocompatible materials to promote regeneration of articular surfaces in the temporomandibular joint and, more particularly, to biomaterials and methods for facilitating fibrochondrocyte and chondrocyte growth in in-vitro and in-vivo environments. The materials include magnesium in solid form and polymer. The materials are effective to grow and regenerate fibrochondrocyte and chondrocyte cells, and restore bone cells.