Deformable Dynamization Device for Controlled Bone Healing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing external fixation devices for bone fractures lack controlled axial destabilization, leading to unpredictable levels of instability and inability to direct dynamization effectively, which hampers the bone healing process.
Innovation Solution
A dynamization device comprising coaxial modules with deformable rings and threaded components, allowing for controlled longitudinal displacement and compression, thereby providing controlled axial destabilization and facilitating bone healing through mechanical stimulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional external fixation devices are used to rigidly fix bone segments, then stability is maintained, but controlled axial destabilization cannot be achieved, hampering bone healing
Solution Approach 1:
The fixation device transitions from a static rigid structure to a dynamic system with controllable instability. The deformable ring mechanism allows the frame to dynamically adjust between stable and unstable states, enabling controlled axial micromotion that accelerates bone healing while maintaining overall structural integrity
Solution Approach 2:
The device changes the stability parameter of the fixation frame from fixed to variable. By modifying the rigidity of connection elements (using deformable rings instead of rigid connectors), the system achieves controlled axial destabilization that promotes callus formation while maintaining lateral and rotational stability
2Adaptability or versatility
If dynamization techniques are applied by removing bars or pins, then axial destabilization is achieved, but wide variations in instability levels occur and directionality cannot be controlled
Solution Approach 1:
The fixation frame is segmented into modular units with individual deformable ring connections. Each ring can be independently configured to provide controlled axial micromotion, allowing precise regulation of instability levels without affecting other parts of the frame. This segmentation enables directional control of dynamization while maintaining consistent stability characteristics
Solution Approach 2:
Deformable rings serve as intermediary elements between rigid frame components. These rings act as controlled compliance elements that introduce predictable axial micromotion while filtering out uncontrolled variations. The rings mediate between the rigid frame structure and the bone segments, providing consistent directional destabilization
3Strength
If rigid frameworks are used to connect opposite rings, then structural strength is maintained, but controlled axial micromotion cannot be provided for therapeutic dynamization
Solution Approach 1:
The frame structure employs local quality differentiation where most connections remain rigid for structural strength, while specific strategic locations use deformable rings to provide controlled compliance. This localized modification enables therapeutic axial micromotion without compromising overall frame strength and stability
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 device enables controlled axial micromotion, accelerating bone healing by applying therapeutically appropriate amounts of dynamization, enhancing the strength of fracture callus and bone regenerate, and expediting the ossification process.
Implementation Method 1
a plurality of proximal deformable rings positioned at the first end of the mated first and second modules and a plurality of distal deformable rings positioned at the second end of the mated first and second modules
Implementation Method 2
an inner column located at a second end of the outer wall, the inner column comprising a threaded recess at the second end
Data Source
AI summary
A dynamization device includes a first module and a second module. The first and second modules are each rigidly affixed to and mated together by one or more deformable rings. Each of the first and second modules includes an inner column positioned within the one or more deformable rings. The mated first and second modules form a first displacement gap between the inner column of the first module and the inner column of the second module. The first displacement gap extends along the longitudinal axis between adjacent deformable rings of the one or more deformable rings.