Spinal Nucleus Implant Composite Water Absorption
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Solution Overview
Problem
Current nucleus pulposus replacement devices lack improved water absorption and swelling capabilities, which are essential for effectively mimicking the natural intervertebral disc's mechanical properties and providing durable, flexible support within the spinal column.
Innovation Solution
A spinal nucleus implant composed of a blend of non-hydrogel polymer material and hydrophilic polymer, with a weight ratio ranging from 1:1 to 19:1, that absorbs water and swells upon insertion, enhancing mechanical properties and biostability, while maintaining structural support and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional molded polymer device is used for nucleus replacement, then structural support is provided, but water absorption and swelling capabilities are insufficient
Solution Approach 1:
The patent applies composite materials by combining hydrophilic polymer particles (which provide water absorption and swelling capabilities) with a molded polymer matrix (which provides structural support). This composite structure allows the implant to simultaneously achieve the mechanical properties of traditional devices while gaining the water absorption capabilities of hydrogels, directly resolving the contradiction between reliability improvement and composition complexity.
2Ease of operation
If the implant is made fully flexible for easy implantation, then ease of operation improves, but structural support capability deteriorates
Solution Approach 1:
The patent applies local quality by creating a composite structure where different regions and phases serve different functions: the hydrophilic polymer particles provide flexibility and water absorption in specific locations, while the molded polymer matrix provides overall structural support. This localized functional distribution allows the implant to be both easy to implant and structurally sound simultaneously.
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 implant effectively absorbs water to increase mechanical properties and durability, providing semi-flexibility for easy implantation and adequate spinal support, reducing the risk of deformation and damage, thus addressing the limitations of existing devices.
Implementation Method 1
The spinal nucleus implant includes a composition comprising a blend of non-hydrogel polymer material and at least one hydrophilic polymer... that absorbs water and swells upon insertion
Implementation Method 2
The spinal nucleus implant includes a composition comprising a blend of non-hydrogel polymer material and at least one hydrophilic polymer... that absorbs water and swells upon insertion
Data Source
AI summary
Embodiments relate to a spinal nucleus implant with water absorption and swelling capabilities, compositions for producing the spinal nucleus implants, and methods of preparing and using the spinal nucleus implants. The spinal nucleus implant can be created from a composition comprising a mixture of non-hydrogel polymer material and at least one hydrophilic polymer, the weight ratio of non-hydrogel polymer material to the at least one hydrophilic polymer being from about 1:1 to about 19:1.