Multiplanar Bone Anchor with Rotating Saddle
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Solution Overview
Problem
Current orthopedic fixation systems lack the ability to provide multiplanar movement, limiting their adaptability to the complex anatomy of the spine and other tissues, which can lead to suboptimal stabilization and alignment during surgical procedures.
Innovation Solution
A multiplanar bone anchor system that includes a bone fastener with a saddle and coupling arrangement, allowing for rotation and movement in multiple planes, enabling precise alignment and stabilization of vertebrae through a connecting rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional fixed bone anchor system is used, then the device structure is simple, but the adaptability to complex anatomy is limited
Solution Approach 1:
The bone anchor system is divided into multiple independent components: a bone fastener (screw or peg), a coupling arrangement, and a saddle. Each component can move independently relative to the others, enabling multiplanar adjustment while maintaining structural simplicity of individual parts.
Solution Approach 2:
The system transitions from a fixed rigid structure to a dynamic adjustable structure. The coupling arrangement allows rotation about a longitudinal axis, and the saddle enables movement relative to the bone fastener, providing controlled multiplanar motion to adapt to complex spinal anatomy.
2Manufacturing precision
If a fixed bone anchor system is used, then the device complexity is low, but the alignment precision is suboptimal
Solution Approach 1:
The coupling arrangement and saddle enable dynamic adjustment of the bone anchor orientation in multiple planes, allowing precise alignment with the spinal anatomy during surgery while maintaining a relatively simple overall device structure.
Solution Approach 2:
The system adds rotational freedom about the longitudinal axis through the coupling arrangement, transitioning from single-plane to multiplanar adjustment capability, thereby improving alignment precision without proportionally increasing device complexity.
3Manufacturing precision
If a multiplanar movable bone anchor system is implemented, then the alignment precision is improved, but the device complexity increases
Solution Approach 1:
By segmenting the system into distinct modular components (bone fastener, coupling arrangement, saddle), each with specific movement capabilities, the patent achieves multiplanar adjustment precision while keeping individual component complexity manageable and allowing standardized manufacturing.
4Reliability
If a traditional fixed anchor system is used, then the device structure is simple, but the stabilization effectiveness is limited
Solution Approach 1:
The movable coupling arrangement and saddle allow the bone anchor to adapt to the natural contours and angles of the spinal anatomy, providing more effective stabilization by conforming to the complex three-dimensional geometry of the vertebrae and surrounding structures.
Data Source
AI summary
The present teachings provide one or more surgical implements for repairing damaged tissue, such as in the case of a spinal fixation procedure. A multiplanar bone anchor system for a fixation procedure is provided. The system can include a bone fastener. The bone fastener can include a head and a second end adapted to engage an anatomy. The bone fastener can extend along a longitudinal axis. The system can also include a coupling arrangement coupled to the head of the bone fastener so that the bone fastener is rotatable about the longitudinal axis to define a first plane of motion. The system can further include a saddle, which can be coupled to the coupling arrangement. The saddle can be movable relative to at least one of the bone fastener and the coupling arrangement to define a second plane of motion.