Twisted Coil Lifting Thread for Elasticity and Hydrolysis Balance
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Solution Overview
Problem
Existing lifting threads used in skin lifting procedures face issues such as short hydrolysis time due to high heat treatment temperatures, difficulty in controlling elasticity, and complications in insertion, leading to potential loss of elasticity and unsightly dimples or marks on the skin.
Innovation Solution
A lifting thread is manufactured in a coil spring shape by twisting and winding medical threads around a needle, with adjustable twist angles to enhance elasticity, and features a withdrawal portion, non-slip combination, and anchors to ensure stable tension and easy insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high heat treatment temperature is applied to increase elasticity, then elasticity is improved, but hydrolysis time becomes too short causing easy degradation
Solution Approach 1:
The patent changes the parameter of heat treatment temperature from high temperature to low temperature (below 75% of melting temperature), thereby maintaining elasticity while extending hydrolysis time and preventing premature degradation of the lifting thread
Solution Approach 2:
The patent applies preliminary twisting to the medical thread before heat treatment, creating torsional stress that generates elastic restoring force. This preliminary action allows the thread to achieve sufficient elasticity without requiring high heat treatment temperatures, thus preserving hydrolysis time
2Strength
If simple coiling and heat treating is used to increase elasticity, then elasticity is improved, but control over elasticity becomes difficult
Solution Approach 1:
The patent applies preliminary twisting to the medical thread before coiling and heat treatment. This preliminary action creates controlled torsional stress that generates predictable elastic restoring force, enabling precise control over the elasticity of the final coil spring structure
Solution Approach 2:
The patent creates a composite structure by combining twisted medical thread with coil spring geometry. The combination of torsional stress from twisting and the spring structure provides controlled and predictable elasticity, overcoming the difficulty of controlling elasticity through simple coiling and heat treatment alone
3Force
If thick outer diameter thread is used to enhance lifting effect, then lifting effect is improved, but insertion complexity increases
Solution Approach 1:
The patent forms the medical thread into a coil spring structure with curved geometry around the needle circumference. This curved structure provides mechanical advantage and enhanced lifting effect through elastic restoration, while the thread itself remains thin enough for easy insertion through the needle
4Reliability
If scale-like thorns are formed on thread surface to fix sagging skin, then skin fixation is improved, but skin surface quality deteriorates with dimples and marks
Solution Approach 1:
The patent removes the scale-like thorn structure from the thread surface, replacing it with a smooth surface coating. The skin fixation function is achieved through the elastic restoration of the coil spring structure and anchoring mechanisms rather than through surface thorns, thereby eliminating dimples and marks on the skin surface
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 lifting thread maintains significant elasticity over time, facilitating easy and safe skin lifting with minimal sagging and reducing the risk of deformation, while avoiding high heat treatment temperatures that shorten hydrolysis time.
Implementation Method 1
twisting a medical thread to generate the torsional stress and winding (coiling) the medical thread around the outer peripheral surface (circumference) of a needle so that a first elastic force according to the torsional stress of the medical thread
Implementation Method 2
a greater stress obtained by adding the tensile or compressive stress of the lifting thread to the first elastic force, that is, a second elastic force, are applied so as to maintain, as is, the elasticity of the skin
Data Source
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AI summary
The present invention relates to a lifting thread, a method for manufacturing the lifting thread, and a lifting thread insertion device. The lifting thread is manufactured in a coil spring shape by twisting a medical thread, and then winding (coiling) same around the outer peripheral surface (circumference) of a needle, such that when the lifting thread is tensioned and compressed during a skin lifting procedure, a first elastic force according to the torsional stress of the medical thread, and the greater stress obtained by adding the tensile or compressive stress of the lifting thread to the first elastic force, that is, a second elastic force, are applied so as to maintain, as is, the elasticity of the skin without sagging of the lifted skin even after a long period of time has elapsed after the skin lifting procedure, and thus a lifting effect can be maximized.