Helicoid Piezoelectric Fixation Assembly for Stable Bone Repair
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Solution Overview
Problem
Orthopedic fixation devices face issues with loosening, migration, and component separation under physiological loads, compromising stability and often requiring additional interventions.
Innovation Solution
The use of a piezoelectric orthopedic fixation assembly with electrically isolated lateral components sandwiching a piezoelectric material, forming a helicoid interface that provides mechanical stability and osteogenic stimulation through piezoelectric signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fixation devices are used to stabilize bone segments, then mechanical support and alignment are provided, but components may loosen, separate, or migrate under physiological loads
Solution Approach 1:
The fixation device is divided into multiple lateral components that are electrically isolated from each other, with piezoelectric material positioned between them. This segmentation allows each component to function independently while collectively providing enhanced stability through both mechanical interlocking and piezoelectric stabilization.
Solution Approach 2:
The invention changes the physical and chemical parameters of the interface between lateral components by introducing piezoelectric material. This material undergoes parameter changes under mechanical stress, generating electrical signals that stabilize the bone-implant interface and prevent loosening and migration of components.
2Strength
If multiple components are assembled to form fixation devices, then mechanical support is provided, but additional fasteners and interventions are required to maintain security
Solution Approach 1:
The invention merges mechanical fastening with piezoelectric stabilization into a unified system. The lateral components are mechanically connected while simultaneously incorporating piezoelectric material at the interface, combining structural support with biological stimulation in a single integrated assembly that reduces the need for additional fasteners.
Solution Approach 2:
The lateral components serve multiple functions: they provide mechanical support, structural alignment, and when equipped with piezoelectric material, they also provide osteogenic stimulation. This multi-functionality reduces the need for separate components and interventions.
3Duration of action of moving object
If fixation devices are subjected to repetitive loading, then physiological function is maintained, but components experience relative movement and loosening
Solution Approach 1:
The piezoelectric material utilizes the periodic mechanical loading that occurs during normal physiological function. Each loading cycle generates electrical signals through the piezoelectric effect, and this periodic electrical stimulation reinforces bone-implant integration, preventing loosening that would otherwise occur with repetitive loading.
Solution Approach 2:
The invention converts the potentially harmful mechanical stresses that cause loosening and migration into beneficial electrical signals. The piezoelectric material transforms mechanical stress at the implant-bone interface into osteogenic electrical impulses that promote bone growth and stabilize the fixation.
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
Enhances fixation stability and promotes bone growth by effectively securing components and generating electrical signals to stimulate osteogenesis, reducing the need for additional fasteners and interventions.
Implementation Method 1
a piezoelectric orthopedic fixation assembly with electrically isolated lateral components sandwiching a piezoelectric material, forming a helicoid interface that provides mechanical stability and osteogenic stimulation through piezoelectric signals
Data Source
AI summary
An orthopedic fixation assembly and a kit for forming same. The orthopedic fixation assembly comprises: an elongated body comprising a first lateral component having a first inner surface, and a second lateral component having a second inner surface, the second inner surface facing and conformal with the first inner surface and defining an interface therewith, the interface defining a helicoid shape about a line extending through the elongated body; and a piezoelectric material at the interface. The kit to make an orthopedic fixation assembly comprises a first lateral component having a first inner surface defining a first helicoid shape; a second lateral component having a second inner surface defining a second helicoid shape, wherein the first lateral component and the second lateral component are configured to be assembled together to form an elongated body, wherein, in the elongated body, the second inner surface faces the first inner surface and the first helicoid shape and the second helicoid shape define an interface therebetween, the interface defining an interfacial helicoid shape about a line extending through the elongated body; and a piezoelectric material configured to be placed in the elongated body at the interface.