Transverse Interbody Implant Sagittal Alignment Correction
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Solution Overview
Problem
Current surgical treatments for spinal disorders such as degenerative spondylolisthesis and kyphosis often fail to achieve consistent and durable correction of sagittal alignment, leading to instability and potential complications like adjacent segment degeneration and proximal junctional kyphosis.
Innovation Solution
A surgical system and method utilizing interbody implants and sagittal angulating pedicle screws to correct spinal kyphotic and translational alignment by positioning an interbody cage transversely within the intervertebral disc space, rotating it to engage the vertebral endplates, and using mechanical instruments to achieve segmental lordosis and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional interbody implants and spinal rods are used to correct kyphotic deformity and vertebral translational deformity, then spinal alignment correction is attempted, but consistent and durable correction of sagittal alignment is not achieved, leading to instability and potential complications
Solution Approach 1:
The patent changes the orientation parameter of the interbody implant from conventional anteroposterior orientation to transverse orientation. This parameter change allows the implant to engage the vertebral endplates more effectively, providing consistent correction of sagittal alignment and improving both manufacturing precision and reliability of spinal stability
Solution Approach 2:
The patent employs asymmetric positioning of the interbody implant within the intervertebral disc space, specifically placing it in the posterior half. This asymmetric placement creates a lever arm effect that enhances the correction of kyphotic deformity and improves the durability of sagittal alignment correction
2Ease of operation
If interbody implants are inserted in conventional orientation, then the procedure is simpler, but the ability to correct spinal kyphotic and translational alignment is insufficient
Solution Approach 1:
The patent introduces a dimensional change by rotating the interbody implant 90 degrees from the conventional anteroposterior orientation to a transverse orientation. This dimensional change enables the implant to engage the vertebral endplates more effectively, significantly improving alignment correction effectiveness while maintaining procedural simplicity through standardized implant design
Data Source
AI summary
A method for treating a spine is provided. The method includes the steps of: disposing an interbody implant adjacent a posterior portion of an intervertebral disc space; connecting a surgical instrument with at least one fixation element fastened with tissue adjacent the posterior portion; and manipulating the surgical instrument such that tissue adjacent the posterior portion engages the interbody implant and one or more vertebra rotate about the interbody implant. Spinal implants; surgical instruments and systems are disclosed.