Modular Spinal Implant With Dynamic Lid for Vertebral Spacing
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Solution Overview
Problem
Current spinal fusion methods using spinal implant devices often result in excessive tensing of soft tissues surrounding the joint space, leading to compressive forces that can dislodge the implant and fail to adequately maintain spacing between vertebrae.
Innovation Solution
A modular spinal implant device with a movable lid that can rotate up to 180 degrees and translate up to 6 mm, featuring a shell and insert that form a cavity for graft material, allowing for adjustable positioning and secure fixation using fasteners, and includes a double pin joint for rotational and translational movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spinal implant device is positioned to force vertebrae apart to tense soft tissues, then the vertebrae exert compressive forces on the implant to maintain it in place, but this excessive tensing can dislodge the implant and fail to maintain proper spacing
Solution Approach 1:
The lid is made movable with rotational and translational capabilities, allowing the implant to dynamically adjust to soft tissue tension changes. The lid can rotate up to 180 degrees and translate up to 6 mm to accommodate varying disc heights and vertebral movements, converting the static rigid structure into a dynamic adaptive one that maintains implant retention without excessive soft tissue tensioning
Solution Approach 2:
The implant allows for adjustable parameters including lid rotation angle (0-180 degrees), translation distance (0-6 mm), and disc height (adjustable via insert selection). These parameter changes enable the implant to achieve proper vertebral spacing and soft tissue tension balance, resolving the contradiction between maintaining implant position and avoiding excessive soft tissue tension
2Manufacturing precision
If a fixed-size implant device is used, then the device structure is simple, but it cannot adequately adjust to maintain proper spacing between vertebrae
Solution Approach 1:
The implant is divided into multiple segments: a fixed shell, a movable lid, and interchangeable inserts. This segmentation allows independent optimization of each component - the shell provides structural integrity, the lid provides adjustability, and the inserts provide precise spacing control. The modular design achieves manufacturing precision for spacing while managing overall device complexity through functional decomposition
Solution Approach 2:
The movable lid with rotational and translational capabilities transforms the static implant into a dynamic adjustable device. The lid can be positioned at different angles and distances to achieve precise vertebral spacing, while the modular insert system allows selection of different disc heights. This dynamic design achieves the required spacing accuracy without excessive structural complexity
3Object-affected harmful factors
If the implant device allows for adjustable positioning, then it can reduce soft tissue tension, but this requires complex mechanisms for movement and fixation
Solution Approach 1:
The implant employs a dynamic movable lid mechanism that can rotate and translate to reduce soft tissue tension. The lid's movement is constrained by simple geometric features on the shell, eliminating the need for complex mechanical joints. After positioning, the lid is secured using a straightforward locking mechanism, achieving soft tissue tension reduction with minimal mechanism complexity
Solution Approach 2:
The implant achieves soft tissue tension reduction through parameter adjustments in lid rotation angle, translation distance, and insert selection. These parameter changes allow the implant to adapt to different anatomical variations and soft tissue conditions. The adjustment process is simplified by providing pre-configured inserts with specific dimensions, reducing the complexity of the adjustment mechanism while maintaining the ability to optimize soft tissue tension
Data Source
AI summary
In some embodiments, a spinal implant device is provided. The spinal implant device can include a shell. The shell can include a movable lid forming an upper surface of the shell. In some embodiments, the movable lid is configured to rotate and translate. The spinal implant device can include an insert configured to couple with the shell. In some embodiments, a spinal implant device is provided. The spinal implant device can include a body, a movable lid configured to rotate relative to the body, and an endplate. The body, the movable lid, and the endplate can form a cavity configured to be packed with material