Interspinous Dynamic Implant with Rotatable Wings
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Solution Overview
Problem
Conventional interspinous implants fail to maintain space between spinous processes, limit movement, require invasive procedures, and do not stabilize perfectly with spinous processes due to inadequate wing adjustment and insertion methods.
Innovation Solution
An interspinous dynamic implant with movable units, elastic cushioning, and rotatable wings that can be securely fastened to spinous processes using rotation rods and spikes, allowing for natural movement and minimizing invasion by inserting from the sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional implant is inserted between spinous processes, then the implant can provide some elastic force, but the spinous process is damaged because upper and lower spinous processes are not fused and are separately moved
Solution Approach 1:
The implant incorporates a movable unit with upper and lower plates that can dynamically move together with the spinous processes during flexion and extension. This dynamic design allows the implant to maintain elastic force while moving synchronously with the spinous processes, preventing damage caused by relative movement between the implant and bone.
Solution Approach 2:
The movable unit acts as an intermediary between the upper and lower spinous processes, coupling them together while allowing controlled movement. The upper and lower plates are connected through a movable mechanism that enables them to move together as a unified structure, preventing separate movement that would damage the spinous processes.
2Volume of moving object
If a conventional implant is used, then it can maintain some space, but the implant escapes between the spinous processes because they are not fused
Solution Approach 1:
The implant uses a dynamic movable unit that moves together with the spinous processes during physiological motion. This synchronous movement prevents the implant from escaping between the spinous processes while maintaining the necessary inter-spinous space for neural structure protection.
Solution Approach 2:
The upper and lower plates are merged into a unified movable structure that moves as one unit with the spinous processes. This merging prevents differential movement between upper and lower components that would cause implant escape, while still allowing the necessary dynamic range of motion.
3Ease of operation
If the implant is inserted from the rear of the back, then it can be positioned between spinous processes, but a long operation time is taken because ligament must be cut
Solution Approach 1:
The implant is designed with pre-configured upper and lower plates and a movable unit that can be inserted as an integrated assembly through a minimally invasive approach. The preliminary configuration of components allows for rapid insertion without time-consuming intraoperative assembly or ligament cutting.
Solution Approach 2:
Instead of inserting the implant from the rear through ligament dissection, the implant can be inserted from the anterior or lateral approach, inverting the traditional insertion path. This alternative approach avoids ligament cutting and reduces operation time while still achieving proper positioning between spinous processes.
4Force
If the implant is inserted, then it can provide elastic force, but the implant is not coupled to the upper and lower spinous processes perfectly and stably because the wing portion is not configured to be adjusted
Solution Approach 1:
The implant features adjustable wing portions with locally varied properties that can be configured to match different spinous process thicknesses. The wings include adjustable parameters such as width, length, and coupling mechanism characteristics, allowing optimization of the coupling interface for each patient's anatomy while maintaining the overall elastic function of the implant.
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 implant maintains space between spinous processes, allows for natural movement without damaging them, reduces operation time, and stabilizes securely with spinous processes, enabling a minimally invasive procedure.
Implementation Method 1
a movable unit coupled between the front portion of the upper plate and the front portion of the lower plate to enable the upper plate and the lower plate to move upward or downward or leftward or rightward within a specific range in response to a movement of the spinous process
Implementation Method 2
a cushion unit of an elastic material which is located between the upper plate and the lower plate
Data Source
AI summary
The present invention relates to an interspinous dynamic implant. Provided is an interspinous dynamic implant comprising: an upper plate which adheres to an upper spinous process; a lower plate which adheres to a lower spinous process; a movable part, coupled between the front portion of the upper plate and the front portion of the lower plate, for enabling the upper plate and the lower plate to move upwards, downwards, left and right within a certain range according to the movement of spinous processes; an upper spinous process coupling means for tightly coupling the upper plate to the upper spinous process; and a lower spinous process coupling means for tightly coupling the lower plate to the lower spinous process.