Intervertebral Prosthetic Disc Posterior Approach
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Solution Overview
Problem
Current artificial disc implantation methods, such as anterior approaches, are invasive and can lead to complications like abdominal wall hematoma, vascular injury, and gastrointestinal injury, necessitating a less invasive solution for intervertebral disc replacement.
Innovation Solution
The development of intervertebral prosthetic discs with superior and inferior endplates and protrusion elements, allowing for posterior or posterior-lateral surgical approaches, which enable precise placement and assembly of smaller components, reducing the need for vascular surgeon assistance and minimizing subsidence risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If anterior approach is used for artificial disc implantation, then access to spine is achieved, but post-operative complications increase (abdominal wall hematoma, vascular injury, gastrointestinal injury)
Solution Approach 1:
The patent inverts the traditional surgical approach by using a posterior or posterior-lateral approach instead of the conventional anterior approach. This allows the surgeon to access the intervertebral space from the back, avoiding damage to abdominal organs and vessels while still achieving the necessary surgical access for disc replacement.
Solution Approach 2:
The prosthetic disc is divided into separate components including endplates and a core, which can be inserted independently through the posterior approach. This segmentation allows the components to be delivered through smaller incisions and assembled in situ, reducing surgical trauma and avoiding complications associated with large anterior exposures.
2Ease of operation
If anterior approach is used for artificial disc implantation, then disc replacement is achieved, but surgical exposure size increases
Solution Approach 1:
By inverting the surgical approach to posterior or posterior-lateral, the patent enables disc replacement through smaller surgical exposures. The endplates and core can be inserted through limited incisions in the posterior region, significantly reducing the surgical exposure area compared to the large anterior exposures required for traditional approaches.
3Reliability
If spinal fusion is performed, then pain reduction is achieved, but range of motion is limited and stress transfers to adjacent discs
Solution Approach 1:
The prosthetic disc incorporates a core that provides dynamic response to mechanical loads, allowing it to adapt to varying spinal movements. This dynamic core enables the device to maintain spinal motion and absorb stresses during movement, preventing stress transfer to adjacent discs while reducing pain, thus avoiding the rigid fusion approach.
Data Source
AI summary
The present invention includes intervertebral prosthetic devices and methods for installing intervertebral prosthetic devices into an intervertebral space. In one embodiment, an intervertebral prosthetic disc includes a superior endplate; an inferior endplate; and at least one protrusion element, wherein at least one of the superior endplate and the inferior endplate is adapted to receive the protrusion element. In another embodiment, the invention includes an intervertebral prosthetic disc having a superior endplate including a core retaining member; an inferior endplate including a core retaining member; and an asymmetric core positioned between the superior endplate and the inferior endplate, wherein the superior endplate and the inferior endplate are adapted to accommodate the core. The present invention also includes an intervertebral prosthetic disc system that includes an intervertebral prosthetic disc and at least one spring element.