Multiple Lead Bone Anchor for Spinal Rod Fixation
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Solution Overview
Problem
Current bone anchor systems for osteosynthesis and orthopedic procedures lack a secure and efficient mechanism to stabilize elongated members like spinal rods to vertebrae, often requiring multiple fixation elements and complex configurations, which can complicate surgical procedures and stability.
Innovation Solution
A bone anchor assembly with a receiver member, bone anchor, and retaining member, featuring a multiple lead thread bone screw and C-shaped spring clip, allowing for secure fixation of elongated members with a substantially fixed axis, enabling faster threading and better purchase with bone tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple fixation elements and complex configurations are used to stabilize elongated members to vertebrae, then the stability and security of fixation is improved, but the device complexity and surgical procedure complexity increase
Solution Approach 1:
The patent combines multiple fixation functions into a single integrated bone anchor assembly that includes a receiver member, bone anchor, and retaining member. This unified structure eliminates the need for separate fixation elements while maintaining secure stabilization of the elongated member to the vertebra through the integrated components working together.
Solution Approach 2:
The bone anchor assembly serves multiple functions simultaneously: the bone anchor provides skeletal fixation, the receiver member captures and secures the elongated member, and the retaining member locks the components together. This multi-functional design replaces what would traditionally require multiple separate fixation elements, reducing overall system complexity while maintaining reliability.
2Reliability
If traditional bone anchor systems are used, then the fixation security is maintained, but the surgical procedure time and complexity increase
Solution Approach 1:
The bone anchor assembly is pre-assembled with the receiver member, bone anchor, and retaining member configured together before surgery. This preliminary preparation allows the surgeon to implant the complete fixation system in a single action rather than assembling multiple separate components during the procedure, significantly reducing surgical time while maintaining fixation security.
Solution Approach 2:
By combining multiple fixation components into a single pre-assembled unit, the patent enables faster implantation. The integrated design allows the entire fixation mechanism to be inserted and secured in one surgical motion, eliminating the time required to individually position and secure multiple separate fixation elements.
3Stability of the object's composition
If multiple fixation elements are used to secure elongated members, then the stability is improved, but the number of components and procedural steps increase
Solution Approach 1:
The patent merges the functions of multiple fixation elements into a single bone anchor assembly comprising a receiver member, bone anchor, and retaining member. This consolidation maintains the stability provided by multiple components while reducing the actual number of separate parts that must be handled, tracked, and implanted during surgery.
Solution Approach 2:
The bone anchor assembly is designed as a universal fixation system where the integrated components work together to provide stabilization. The receiver member captures the elongated member, the bone anchor secures it to bone, and the retaining member locks the assembly - all in one unit that replaces what would traditionally require multiple separate fixation devices.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The assembly provides stable and efficient fixation of orthopedic constructs, allowing for faster surgical procedures and enhanced stability of elongated members like spinal rods, reducing the complexity of fixation and improving surgical outcomes.
Implementation Method 1
A bone anchor assembly with a receiver member, bone anchor, and retaining member, featuring a multiple lead thread bone screw and C-shaped spring clip, allowing for secure fixation of elongated members with a substantially fixed axis, enabling faster threading and better purchase with bone tissue.
Implementation Method 2
A bone anchor assembly with a receiver member, bone anchor, and retaining member, featuring a multiple lead thread bone screw and C-shaped spring clip
Data Source
AI summary
An orthopedic bone anchor device is disclosed that includes, in one embodiment, a receiver member, an anchor member and a retaining member. The retaining member may retain the anchor member at least partially in the receiver member. In certain embodiments, the anchor member may have a groove in a head for accommodating part of the retaining member, and/or a multiple lead thread.