Two-Film Biodegradable Bone Augmentation Bag for Stable Placement
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Solution Overview
Problem
Existing bone augmentation techniques using resorbable barrier membranes are not user-friendly, as they require complex intraoral operations to fix the bone substitute, leading to reduced bone augmentation and prolonged surgery times, and existing single-sheet membranes allow the bone substitute to move, halving the augmentation amount.
Innovation Solution
A biodegradable bag composed of two films with different degradation times, where the first film has a longer degradation time than the second, allowing for easy identification and placement, eliminating the need for complex fixation procedures by ensuring the bone substitute remains in place during bone augmentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single-sheet resorbable barrier membrane is used, then the membrane can be easily placed, but the bone substitute moves during surgery reducing augmentation effectiveness
Solution Approach 1:
The barrier membrane is divided into multiple sheets (first sheet and second sheet) that are stacked together. The first sheet has through-holes that allow the bone substitute to pass through and be anchored, while the second sheet provides additional barrier function. This segmentation enables the bone substitute to be securely held without requiring complex fixation procedures.
2Reliability
If barrier membrane fixation pins or sutures are used to stabilize the membrane, then the bone substitute stability improves, but the surgical complexity and time increase
Solution Approach 1:
The barrier membrane structure itself provides the fixation function through its design features (through-holes in the first sheet that receive and anchor the bone substitute). This eliminates the need for separate fixation pins or sutures, as the membrane serves both as a barrier and as a fixation device, reducing surgical complexity and time.
3Reliability
If fixation pins are used to secure the barrier membrane, then the membrane stability improves, but the surgery time is prolonged
Solution Approach 1:
The barrier membrane and fixation function are merged into a single integrated structure. The first sheet's through-holes serve dual purposes: allowing bone substitute placement and providing anchorage points for stabilization. This combination eliminates the need for separate fixation steps, reducing surgery time while maintaining stability.
4Reliability
If a non-resorbable barrier membrane or titanium frame is used, then the bone substitute stability is maintained, but the biocompatibility and resorbability are reduced
Solution Approach 1:
The barrier membrane is designed to be resorbable, with its mechanical properties changing over time as it degrades. The first sheet provides initial structural support and fixation, then gradually resorbs as bone regenerates. This parameter change (from rigid to resorbable) maintains stability when needed while improving biocompatibility as the healing progresses.
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 biodegradable bag provides user-friendly bone augmentation by maintaining the bone substitute in position, reducing surgery complexity and time, while ensuring effective bone regeneration without the need for additional fixation methods.
Implementation Method 1
an in vivo degradation time of the first film is equal to or longer than an in vivo degradation time of the second film
Data Source
AI summary
A bag 1 is used for bone augmentation, includes a first film 2a and a second film 2b each made of a biodegradable component, and has an opening 3 between the first film 2a and the second film 2b superimposed and bonded with each other. An in vivo degradation time of the first film 2a is equal to or higher than an in vivo degradation time of the second film 2b, and if the in vivo degradation times of the first film 2a and the second film 2b are different from each other, the first film 2a and the second film 2b are different from each other so as to be visually or tactilely identifiable.