Minimally Invasive Bone Graft Delivery Tool
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Solution Overview
Problem
Conventional dentoalveolar bone grafting procedures are costly, time-consuming, and pose risks of dehiscence and infection due to large incisions, and lack a minimally invasive delivery tool for bone augmentation and thickening applications.
Innovation Solution
A delivery tool with a hollow tube and plunger system that forms a layer of hardened paste and particles under tissue via a minimal incision, using a straight or curved design to lift and deposit bone cement and particles beneath the tissue, allowing for quick hardening and minimally invasive bone grafting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional crest incision and flap surgery are used for bone grafting, then complete exposure of the bony defect is achieved, but dehiscence and infection risks increase significantly
Solution Approach 1:
The invention extracts the essential function of bone graft delivery from the complex conventional surgical procedure. By using a syringe-based delivery system, the bone graft can be deposited directly through a small incision without requiring extensive flap elevation and exposure, thus eliminating the harmful effects of large incisions while maintaining the core grafting function.
Solution Approach 2:
The syringe and needle assembly act as an intermediary device that bridges the gap between the bone graft material and the target site. This intermediary system allows for precise delivery of the graft through minimal access, replacing the need for direct surgical exposure and complex flap manipulation.
2Ease of operation
If large incisions are made to expose the bony defect, then complete access to the grafting site is obtained, but post-operative swelling and pain increase
Solution Approach 1:
The invention extracts only the necessary minimal incision required for needle insertion, eliminating the need for large crestral incisions and extensive flap elevation. This selective extraction of the essential access route dramatically reduces tissue trauma, swelling, and post-operative pain while maintaining adequate access for graft delivery.
Solution Approach 2:
Instead of making a large incision affecting a broad area, the invention applies local quality by creating a small localized incision only where the needle needs to penetrate. This localized approach minimizes the affected area, reducing overall swelling and pain while providing sufficient access for the delivery needle.
3Reliability
If barrier membrane or bone screws are used to fix the implant, then graft migration is prevented, but the procedure becomes more costly and time-consuming
Solution Approach 1:
The invention employs the patient's own periosteum as a natural barrier membrane to prevent graft migration. This self-service approach eliminates the need for additional synthetic membranes or fixation devices, thereby reducing procedure time and cost while maintaining effective graft stabilization. The periosteum naturally elevates and covers the deposited graft material.
Solution Approach 2:
The elevated periosteum acts as a natural intermediary barrier between the deposited bone graft and the external environment. This biological mediator prevents graft migration and contamination without requiring synthetic membranes or mechanical fixation, simplifying the procedure and reducing costs.
4Reliability
If complex flap dissection is performed to close the wound, then adequate wound closure is achieved, but surgical complexity and operating time increase
Solution Approach 1:
The invention extracts the essential wound closure function from the complex multi-step flap dissection and suturing process. By delivering the graft through a small incision that naturally elevates the periosteum, the procedure eliminates the need for extensive flap elevation, dissection, and tension-free suturing, thereby dramatically improving surgical efficiency while maintaining adequate wound closure.
Solution Approach 2:
The elevated periosteum serves as a self-closing mechanism that naturally covers and protects the deposited bone graft. This self-service closure eliminates the need for complex manual flap manipulation and suturing, allowing the wound to close naturally while protecting the graft material, thus significantly improving surgical efficiency.
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
Enables efficient, minimally invasive bone grafting with reduced post-operative swelling and pain, and facilitates bone augmentation and thickening in dental and orthopedic applications with reduced surgical complexity and risk.
Implementation Method 1
a layer of hardened paste and particles under the layer
Data Source
AI summary
The present invention provides a delivery tool and a method for bone grafting on a bone surface via a minimally invasive approach, wherein a structure having a layer of hardened paste and particles under the layer is formed by using the delivery tool. The layer helps to keep particles on the bone surface.