Spinal Stabilization Device with Bone Integration Surface
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Solution Overview
Problem
Current spinal fusion techniques face challenges in achieving stable and efficient fusion between adjacent vertebrae, as existing implants may not adequately address spinal misalignment and instability, leading to potential migration and inadequate bone integration.
Innovation Solution
A spinal stabilization device with a bifurcated end and a middle portion is designed to be positioned between adjacent vertebrae, featuring a bone integration surface and mechanical fixation mechanisms to promote fusion, including a plate fixation device that couples with pedicle screws to enhance stability and bone growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional spinal fusion implants are used, then spinal stabilization is achieved, but implant migration and inadequate bone integration occur
Solution Approach 1:
The implant is divided into multiple functional segments: a curved body portion for anatomical fitting, transverse process engagement features for lateral stabilization, and longitudinal engagement features for apical stabilization. This segmentation allows each portion to address specific instability mechanisms independently, preventing both lateral and longitudinal migration while maintaining spinal stabilization.
Solution Approach 2:
The implant design incorporates nested engagement features where transverse process engagement elements are integrated within the curved body structure, and longitudinal engagement features are embedded along the implant length. This nested configuration maximizes stabilization surface area while maintaining a compact implant profile that fits within the spinal anatomy.
2Reliability
If traditional spinal fusion implants are used, then spinal stabilization is achieved, but inadequate bone integration occurs
Solution Approach 1:
The implant surface is differentiated into distinct zones with varying properties: roughened surfaces and porous structures are applied specifically at bone contact interfaces to enhance osteointegration, while smoother surfaces are used in regions requiring flexibility or soft tissue compatibility. This local quality variation optimizes bone integration at critical interfaces without compromising overall implant functionality.
Solution Approach 2:
The implant incorporates porous coating layers and interconnected pore structures at bone contact surfaces, providing pathways for bone ingrowth and vascularization. The porous architecture increases surface area for bone attachment and allows mechanical interlocking between bone and implant, significantly enhancing bone integration strength while maintaining implant porosity for nutrient transport.
3Strength
If rigid fixation is used to ensure stability, then mechanical support is improved, but bone formation is inhibited
Solution Approach 1:
The implant incorporates flexible elements and compliant mechanisms that allow controlled micromotion between the implant and bone surfaces. This dynamic design enables the implant to adapt to physiological loading conditions, providing sufficient mechanical support while allowing the controlled movement necessary for osteogenesis and bone formation. The flexibility gradient allows rigid fixation where needed and compliant interaction where bone formation is required.
Data Source
AI summary
Technologies are generally provided for devices, systems, and methods to provide spinal fixation, spinal stabilization, and/or spinal fusion. Example devices may include a first end and a second end with a middle portion extending between the first and second end. The first end may be configured to be in contact with a portion of a first or upper vertebra and the second end may be configured to be in contact with a portion of a second or lower vertebra in an adjacent vertebral pair. Portions of the vertebra which may be in contact with the device may include lamina, processes, vertebral bodies, and facet joints. The example devices may include bone engagement features, such as screws or similar fasteners, to enhance stabilization and fixation when in contact with the vertebrae. Additionally, the devices may include a bone integration feature to promote bone growth and to facilitate fusion between the vertebrae.