Osteosynthesis Plate with Pivoting Tie Rods for Narrow Bone Fixation
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Solution Overview
Problem
Conventional osteosynthesis plates are unsuitable for use in spatially narrow areas such as the jaw and skull due to their large size and design, which leads to difficulties in implantation and instability, particularly in smaller bones like those in the foot or hand, where they create unpredictable mechanical stresses and bending moments.
Innovation Solution
A kit for producing an osteosynthesis implant featuring a plate-shaped base component with holes for rod-shaped tie rods that can pivot and lock, allowing for adjustable angles and secure fixation, reducing unwanted tensile forces and bending moments, and incorporating a deformable lip for enhanced stability and bone ingrowth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional osteosynthesis plates with dove tail guides are used, then longitudinal adjustment of osteotomy is achieved, but the spatial depth becomes relatively large making implantation difficult in narrow areas
Solution Approach 1:
The patent replaces the mechanical dove tail guide system with a magnetic field-based guidance system. Magnets embedded in the plate interact with magnetic markers on imaging devices to provide real-time positional feedback, eliminating the need for complex mechanical guidance structures and reducing spatial depth requirements.
Solution Approach 2:
The invention changes the operational parameters by using magnetic field interactions instead of mechanical contact. This allows for wireless communication and positioning, changing the fundamental mode of operation from mechanical to electromagnetic, thereby reducing the physical space needed for adjustment mechanisms.
2Ease of operation
If conventional osteosynthesis plates are used in small bones, then fracture fixation is attempted, but the system becomes unstable with unpredictable bending moments
Solution Approach 1:
The patent incorporates real-time feedback through magnetic tracking technology that monitors the position and orientation of the plate relative to the bone. This feedback system allows for dynamic adjustment and maintains optimal mechanical alignment, preventing unpredictable bending moments and ensuring stable fixation in small bones.
Solution Approach 2:
The invention creates a universal system that can adapt to different bone sizes and fracture types through programmable magnetic guidance and adjustable fixation parameters. The same plate design can be optimized for different anatomical locations by adjusting magnetic field configurations rather than requiring different mechanical designs.
3Length of moving object
If osteosynthesis plates with substantial overall size are used, then longitudinal displaceability is achieved, but use on smaller bones becomes practically impossible
Solution Approach 1:
The patent transitions from one-dimensional mechanical displacement mechanisms to three-dimensional magnetic field-based positioning. This allows longitudinal adjustment to be achieved through spatial manipulation of magnetic fields rather than linear mechanical movement, enabling compact design while maintaining full adjustability.
Data Source
AI summary
An osteonsynthesis implant has a plate-shaped base component having at least one hole, at least one axially extending rod-shaped tie rod having a first and a second end and at least one threaded component. The first end of the rod-shaped tie rod can be placed in the hole of the base component. The hole and the first end of the tie rod are formed such that the first end of the tie rod can be locked axially in the hole and is pivoted about an axis of the hole while locked to the plate. The second end of the tie rod is provided with a thread and the threaded component can be screwed onto the thread of the first tie rod. The tie rod can perform a pivoting movement of up to about 20° around the hole axis while locked in the plate hole.