Modular Crossbar Spinal Prosthesis for Patient-Specific Alignment
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Solution Overview
Problem
Current spinal prostheses lack modular designs that are configurable and adaptable to patient-specific disease states and anatomies, particularly for facet joint replacements, which limits their ability to restore biomechanical motion and align the spine properly, leading to incomplete pain relief and mobility issues.
Innovation Solution
A modular spinal prosthesis system with configurable and adaptable components, including cephalad and caudal prosthesis elements and crossbars, that can be selected and positioned to fit individual anatomical needs, providing adjustable features such as length, width, and orientation to accommodate various spinal anatomies and disease states, and can be secured using various fixation methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional non-modular spinal prostheses are used, then the device structure is simpler, but the adaptability to patient-specific anatomies and disease states is reduced
Solution Approach 1:
The spinal prosthesis is divided into multiple modular components including articulating members, crossbar members, and fixation members that can be independently selected and configured. Each component can be customized in size, shape, and orientation to match patient-specific anatomies and disease states, resolving the contradiction between adaptability and complexity by making the system modular rather than monolithic.
Solution Approach 2:
The modular components are designed with universal interfaces and standardized connection mechanisms that allow the same basic component types to serve multiple functions across different patient populations and anatomical variations. This enables a finite set of modular components to address an infinite variety of patient-specific needs, improving adaptability without proportionally increasing complexity.
2Reliability
If fixed-design prostheses are used, then the manufacturing process is simpler, but the ability to restore biomechanical motion is limited
Solution Approach 1:
The prosthesis incorporates articulating members with spherical bearing surfaces and crossbar members with adjustable orientations that allow dynamic adaptation to physiological motion patterns. The modular design enables customization of the range of motion and mechanical properties to match patient-specific biomechanical requirements, improving reliability of motion restoration while maintaining manufacturability through standardized dynamic components.
3Manufacturing precision
If non-configurable prostheses are used, then the implantation procedure is faster, but the spinal alignment accuracy is reduced
Solution Approach 1:
The modular components are pre-manufactured with precise geometries, standardized interfaces, and predetermined orientation features that enable accurate spinal alignment. The fixation members include pre-configured engagement surfaces and positioning elements that facilitate rapid and accurate component placement, reducing the time penalty associated with modular assembly while maintaining high alignment precision.
4Reliability
If traditional facet joint replacement methods are used, then the treatment approach is simpler, but the pain relief completeness is insufficient
Solution Approach 1:
The modular prosthesis system allows customization of each component's properties (size, shape, material, orientation) to match the specific pathological conditions and anatomical variations of each patient. This localized optimization of component characteristics enables more effective pain relief by addressing the unique requirements of each facet joint replacement case, justifying the increased system complexity.
Data Source
AI summary
Modular spinal prosthesis having one of both of adaptable and configurable components is provided. The modular spinal prosthesis described herein provides an artificial articular configuration to replace damaged, worn or otherwise removed spinal facet elements.