Pivoting Bone Fastener for Spinal Stabilization
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Solution Overview
Problem
Current spinal implant systems for treating disorders such as degenerative disc disease and osteoporosis often fail to provide adequate stabilization while minimizing stress on spinal elements, leading to incomplete relief of symptoms and potential further damage.
Innovation Solution
A spinal implant system featuring a bone fastener with a pivoting mechanism allowing independent transverse and sagittal movement, enabling precise control and stabilization through a rotatable receiver and saddle configuration that accommodates a vertebral rod, reducing stress on spinal elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid fixation is used to provide stabilization, then stability is improved, but stress on spinal elements increases
Solution Approach 1:
The bone fastener incorporates a pivoting member that allows dynamic adjustment between fixed and angled positions, enabling the device to adapt to spinal curvature while providing stabilization. This dynamic capability reduces stress on spinal elements by allowing controlled movement rather than rigid fixation.
Solution Approach 2:
The device allows changing the orientation parameter of the fastener relative to the longitudinal axis through the pivoting mechanism. By adjusting the angle parameter, the system can optimize stabilization while distributing stress more evenly across spinal elements.
2Stability of the object's composition
If multiple fasteners are used to improve stabilization, then stability is improved, but device complexity increases
Solution Approach 1:
The bone fastener is divided into distinct functional segments: a longitudinal portion for penetration, a pivoting member for angular adjustment, and a transverse portion for rod engagement. This segmentation allows each component to perform its specific function efficiently, providing stabilization without requiring multiple separate fasteners.
Solution Approach 2:
The single bone fastener device performs multiple functions: it provides structural support, allows angular adjustment via pivoting, and secures the vertebral rod through the transverse portion. This multi-functionality eliminates the need for multiple separate devices while maintaining stabilization effectiveness.
3Ease of manufacture
If fixed orientation fasteners are used, then ease of manufacture is improved, but adaptability to different spinal configurations decreases
Solution Approach 1:
The pivoting member enables the fastener to adapt to different spinal configurations by allowing angular adjustment during implantation. The mechanism can be set to various angles relative to the longitudinal axis, providing versatility while maintaining a relatively simple manufactured structure.
Solution Approach 2:
The fastener is pre-manufactured with the pivoting capability built into its structure, allowing it to adapt to different spinal configurations during surgery without requiring complex custom manufacturing for each case. The standardized design with inherent adjustability balances ease of manufacture with adaptability.
Data Source
AI summary
A bone fastener comprises a proximal portion including an inner surface that defines a cavity. A carrier is disposed in fixed engagement with the inner surface. A pivoting member is disposed with the carrier and relatively moveable therefrom. A distal portion defines a longitudinal axis and is configured to penetrate tissue. The proximal portion is rotatable relative to the distal portion in a first plane of a body and the pivoting member is rotatable relative to the proximal portion in a second plane of the body. Methods of use are disclosed.