Artificial Spinal Disk Prosthesis With Rotatable Inserts
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Solution Overview
Problem
Existing artificial spinal prostheses face challenges with material fatigue and patient comfort, particularly in providing adjustable insertion angles and stable fixation in spinal joint replacements.
Innovation Solution
The development of an intervertebral endoprosthesis with rotatable inserts and adjustable fastener angles, allowing for independent rotation of movable inserts within anterior cavities to optimize screw insertion angles, and a surgical cage with rotatable structures for enhanced screw placement, facilitating better stabilization between vertebrae.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed fastener angles are used in artificial spinal prostheses, then the structure is simpler and easier to manufacture, but the insertion angles cannot be adjusted to optimize screw placement and fixation stability
Solution Approach 1:
The patent implements adjustable fastener angles through rotatable inserts within the prosthesis structure. The inserts can rotate independently within their respective cavities, allowing the fastener angles to be dynamically adjusted during surgery to optimize screw placement. This dynamic adjustment capability resolves the contradiction by providing adaptability while maintaining a relatively simple overall prosthesis design.
Solution Approach 2:
The prosthesis is divided into multiple independent segments including rotatable inserts within anterior cavities. Each insert can rotate independently to adjust its fastener angle, allowing customized screw placement without requiring complex overall structural changes. This segmentation enables adjustability while keeping individual components simple.
2Reliability
If conventional fixed fastener designs are used, then manufacturing is easier and cost is lower, but material fatigue increases and fixation stability decreases due to inability to optimize screw insertion angles
Solution Approach 1:
The rotatable inserts allow dynamic adjustment of fastener angles to optimize screw insertion angles for each patient's specific anatomy. This dynamic capability enhances fixation stability and reduces material fatigue by ensuring optimal load distribution, while the inserts themselves remain relatively simple components that can be manufactured using conventional methods.
Solution Approach 2:
The patent changes the parameter of fastener angle from fixed to adjustable through the rotatable inserts. This parameter change allows optimization of screw insertion angles to match individual patient requirements, improving fixation stability and reducing material fatigue without requiring fundamentally new manufacturing processes.
3Ease of operation
If non-adjustable fastener angles are used, then the device is simpler and more durable, but patient comfort decreases due to improper alignment and increased stress concentration
Solution Approach 1:
The rotatable inserts provide dynamic adjustment of fastener angles during the surgical procedure, allowing precise optimization of screw placement angles for each patient's unique spinal anatomy. This dynamic adjustment capability improves screw placement precision and patient comfort while maintaining relatively simple insert mechanisms that do not significantly increase overall device complexity.
Data Source
AI summary
Intervertebral endoprosthesis discs suitable for surgical implantation between two vertebrae having and methods thereof. The prosthetic disc may have an endoprosthesis body including an anterior region and a posterior region designed to be positioned between a first vertebra and a second vertebra with a first and second movable insert positioned rotatably in anterior cavities and is rotatable to adjust the fasteners.