Curved Intersomatic Cage Anchoring Device for Vertebral Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing spinal implants, such as intervertebral prostheses and intersomatic cages, face stability issues within the disc space due to movement under stress, and current bony anchoring devices require large incisions and are difficult to implant, especially with limited access around vertebrae due to blood vessels and nerves.
Innovation Solution
An anchoring device with a curved body that can be implanted along the plane of the intervertebral space, featuring a slot on the implant that allows the device to penetrate vertebral plates at an angle, reducing the necessary space for implantation and providing better anchoring without the need for large incisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bony anchoring devices are used to secure the prosthesis or cage to the vertebral plates, then the stability and anchoring strength is improved, but the implantation becomes more difficult and requires large incisions
Solution Approach 1:
The anchoring device features a curved body that allows it to be implanted along the plane of the intervertebral space rather than requiring perpendicular access. This curvature enables the device to navigate around blood vessels and nerves at the edges of the intervertebral space, providing effective anchoring without requiring large incisions or complex surgical approaches
2Reliability
If bony anchoring devices penetrate into the vertebrae to secure the implant, then the retention and stability is improved, but the necessary space for implantation increases
Solution Approach 1:
The anchoring device changes the approach dimension by implanting along the plane of the intervertebral space rather than perpendicular to it. This dimensional change allows the device to achieve sufficient penetration depth into the vertebral plates while requiring minimal lateral space at the edges of the intervertebral space, making it suitable for cases with limited surgical access
3Strength
If traditional anchoring devices are implanted perpendicular to the intervertebral space plane, then the anchoring effectiveness is improved, but the risk to patient and complexity of surgery increases
Solution Approach 1:
The curved body of the anchoring device enables implantation along the plane of the intervertebral space, avoiding the need to make large incisions that would be required for perpendicular implantation. This reduces exposure of blood vessels and nerves, thereby decreasing surgical risk while maintaining anchoring effectiveness through sufficient penetration into the vertebral plates
Data Source
AI summary
An intersomatic cage, an intervertebral prosthesis, an anchoring device and an instrument for implantation of the cage or the prosthesis and the anchoring device are provided. An intersomatic cage or an intervertebral prosthesis fit closely to the anchoring device, which includes a body of elongated shape on a longitudinal axis, of curved shape describing, along the longitudinal axis, an arc whose dimensions and radius of curvature are designed in such a manner that the anchoring device may be implanted in the vertebral plate of a vertebra by presenting its longitudinal axis substantially along the plane of the intervertebral space, where the anchoring device is inserted, by means of the instrument, through a slot located in at least one peripheral wall of the cage or on at least one plate of the intervertebral disc prosthesis to penetrate into at least one vertebral plate.