Memory Alloy Periosteal Plate for Long Bone Curvature Correction
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Solution Overview
Problem
Current treatments for long bone curvature, such as surgical correction, involve high risks and complications, and non-surgical methods like correction braces are ineffective for severe cases, requiring complex postoperative rehabilitation.
Innovation Solution
A memory alloy periosteal traction plate made of nickel-titanium alloy, designed to fit the long bone surface and transition from a bending to a straight state, supporting and promoting subperiosteal osteogenesis to increase bone strength and prevent fractures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surgical correction is used to treat severe long bone curvature, then the curvature can be effectively corrected and skeletal function restored, but the procedure involves high risks, complications, and long postoperative rehabilitation
Solution Approach 1:
The plate utilizes phase transition temperature change (from low temperature bent state to body temperature straight state) to achieve automatic shape recovery, eliminating the need for complex surgical procedures while maintaining effective curvature correction
Solution Approach 2:
The memory alloy plate automatically recovers its straight shape at body temperature without requiring external power sources, control systems, or complex activation mechanisms, thereby reducing surgical complexity and patient risk
2Reliability
If conventional osteotomy and fixation methods are used, then long bone curvature can be corrected, but the surgical trauma is large and the operation is complex
Solution Approach 1:
The invention extracts only the essential function of shape recovery from complex fixation devices, using a simple memory alloy plate that relies on thermal phase transition rather than mechanical fixation systems
Solution Approach 2:
The patent replaces complex mechanical fixation systems with a thermal-field-based solution where the memory alloy's phase transition temperature change drives automatic shape recovery, eliminating the need for complex surgical fixation procedures
3Ease of operation
If correction braces are used for mild long bone curvature, then gradual correction can be achieved, but patient compliance is required and the method is ineffective for severe cases
Solution Approach 1:
The memory alloy plate serves as an intermediary that translates thermal energy from the body into mechanical shape recovery force, providing passive automatic correction without requiring patient compliance or active control while maintaining effectiveness for severe cases
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 plate provides safe, reliable correction of long bone curvature with minimal surgical trauma, stimulating bone growth and restoring skeletal function without osteotomy, suitable for severe and progressive cases.
Implementation Method 1
The plate body is made of a nickel-titanium alloy material, and is arc-shaped through low-temperature treatment. The reversible phase transition temperature of the plate body is 35°C. The plate body is capable of gradually transitioning from a bending state to a straight state by means of deformation
Implementation Method 2
The plate body is made of a nickel-titanium alloy material, and is arc-shaped through low-temperature treatment. The low temperature is in a range of 0 ̃4° C.
Data Source
AI summary
A memory alloy periosteal traction plate is provided, including a plate body and screws. A work surface, a proximal installation end, and a distal installation end are formed on the plate body. The work surface fits a surface of a curved long bone, and extends in a length direction of the long bone. The proximal installation end is located at one end, close to a proximal end of the long bone, of the plate body, and the distal installation end is located at one end, close to a distal end of the long bone, of the plate body. Both the proximal installation end and the distal installation end are firmly connected to the long bone through screws by means of multiple fixing points, the plate body can gradually transition from a bending state to a straight state by means of deformation.