Bioresorbable Suture Thread with Melted Core Bonding
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Solution Overview
Problem
Conventional braided suture threads suffer from separation at cut ends and points of torsional bending, leading to lower knot security and inefficient production processes.
Innovation Solution
A bioabsorbable suture thread is created by winding higher-melting bioabsorbable threads around a core thread made of a lower-melting bioabsorbable component, with the core thread being melted through heat treatment to bond with the winding threads, enhancing flexibility, tensile strength, and knot security while improving production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a braided suture thread is used to achieve high flexibility and tensile strength, then the thread becomes separated at cut ends and points of torsional bending
Solution Approach 1:
The invention extracts the core thread from the braided structure and melts it to form a bonding matrix that holds the winding threads together. This eliminates the separation problem at cut ends and torsional bending points while maintaining the braided configuration's mechanical properties.
Solution Approach 2:
The core thread undergoes a phase transition from solid to molten state through heat treatment, then solidifies to form a bonding matrix. This phase change enables the core thread to transition from a structural element to a bonding agent, securing the winding threads without requiring complex braiding.
2Ease of operation
If a braided suture thread is used to achieve high flexibility, then the thread structure becomes complex requiring many production steps
Solution Approach 1:
The invention replaces the mechanical braiding process with a thermal bonding process. Instead of mechanically interweaving multiple threads in complex patterns, the core thread is melted to chemically/physically bond the winding threads, significantly simplifying the production process while maintaining flexibility.
Solution Approach 2:
The invention changes the physical state parameter of the core thread from solid to molten and back to solid through controlled heat treatment. This parameter change enables a different bonding mechanism that simplifies the overall structure formation process while preserving the desired flexibility characteristics.
3Ease of manufacture
If the core thread melting point is too low (below 50°C), then the core thread runs off during production steps
Solution Approach 1:
The invention selects a core thread material with a melting point in the optimal range of 50-200°C. This parameter selection ensures the core thread remains stable during production handling but can be reliably melted during the bonding process, achieving both processability and retention.
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 resulting suture thread maintains its structure without untwisting at cut ends or torsional bending, offers high knot security, and significantly enhances production efficiency compared to traditional methods.
Implementation Method 1
The core thread is molten by heat treatment so that the core thread plays a role as a bonding resin for bonding the core thread to the winding threads
Implementation Method 2
melting the core thread by heat treatment to bond the core thread to the winding threads
Data Source
Figure 1~2
Figure 3~4(b)
Figure 5(a)~5(b)
AI summary
An feature of the present invention is to provide a bioabsorbable suture thread that has high flexibility and high tensile and knot strengths, maintains its figure without untwisting a plurality of threads even at a cut end or a point of torsional bending, and is excellent in knot security and production efficiency. The bioabsorbable suture thread of the present invention comprises: a core thread made of a bioabsorbable lower-melting component; and a plurality of winding threads made of a bioabsorbable higher-melting component, the winding threads being wound around the core thread, wherein the bioabsorbable suture thread has a structure in which the core thread molten by heat treatment is bonded to the winding threads.