Movable Spinal Implant Support for Offset Bone Screw Alignment
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Solution Overview
Problem
Current surgical methods for correcting spinal disorders, such as scoliosis and kyphosis, face challenges in effectively aligning and stabilizing vertebrae while minimizing stress on bone and screw interfaces, particularly in accommodating anatomical variations and different types of bone screws.
Innovation Solution
A spinal correction system comprising an implant support with movable members that engage bone fasteners, allowing for offset alignment and clamping mechanisms to secure rods, enabling efficient deformity correction across sagittal, coronal, and axial planes, and accommodating various bone screw types, including multi-axial screws, while reducing stress on bone/screw interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional surgical methods are used to align and stabilize vertebrae, then the surgical procedure can be performed with conventional instruments, but the alignment precision and stress distribution on bone/screw interfaces are insufficient
Solution Approach 1:
The implant support incorporates movable members that can transition between locked and movable states, allowing dynamic adjustment during surgery to achieve precise alignment while distributing stresses more effectively across the bone/screw interfaces
Solution Approach 2:
The system allows modification of geometric parameters such as offset distances and angular orientations of the implant support members to optimize alignment precision and stress distribution for different anatomical configurations and surgical requirements
2Adaptability or versatility
If fixed configuration implant supports are used, then the device structure is simple, but the system cannot accommodate anatomical variations and different bone screw types
Solution Approach 1:
The implant support features members that can be selectively locked or moved, providing adaptability to different anatomical variations and bone screw types without requiring completely different implant designs for each case
Solution Approach 2:
The implant support is designed with universal engagement features that can accommodate various bone screw types and anatomical configurations through a single device design, reducing the need for multiple specialized implants
3Manufacturing precision
If the longitudinal axis is aligned directly with the bone fastener axis, then the engagement is straightforward, but the system cannot achieve offset alignment needed for deformity correction
Solution Approach 1:
The implant support employs asymmetric geometry with offset longitudinal axes relative to the bone fastener engagement points, enabling precise offset alignment for deformity correction while maintaining straightforward engagement through specialized coupling mechanisms
Data Source
AI summary
An implant support comprises a first member including a first portion and a second portion configured to engage a bone fastener. The second portion extends in a transverse orientation from the first portion. The members define a longitudinal axis. The second member includes a first portion and a second portion configured to engage the bone fastener. The second portion of the second member extends in a transverse orientation from the first portion. At least one of the members is movable relative to the longitudinal axis between a first configuration and a second configuration such that the longitudinal axis is offset relative to an axis of the bone fastener. Systems and methods are disclosed.