Composite Bone Fusion Cage with PEEK Liner and Porous Titanium
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Solution Overview
Problem
Current bone fusion cages made from single materials like PEEK or bone trabecular material fail to achieve effective bone growth and stability, leading to poor postoperative recovery and high recurrence rates due to material limitations and complex surgical procedures.
Innovation Solution
A bone trabecular fusion cage made from titanium alloy powder with porous side walls for bone ingrowth, combined with a polyether-ether-ketone liner for enhanced elastic modulus, designed for easy implantation and integration with the spinal anatomy, eliminating the need for bone grafting and reducing surgical complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If pure PEEK material is used for the fusion cage, then good elastic modulus of bone is obtained, but no bone growth effect is achieved
Solution Approach 1:
The invention uses a composite structure combining PEEK material with bone trabecular material. The PEEK component provides the necessary elastic modulus and structural support, while the bone trabecular component promotes bone growth and integration. This composite approach resolves the contradiction by integrating the advantages of both materials rather than relying on a single material.
Solution Approach 2:
Different regions of the fusion cage are assigned different materials based on their specific functional requirements. The PEEK material is used where structural support and elastic modulus are critical, while the bone trabecular material is positioned where bone growth and integration are prioritized. This local differentiation allows each material to perform its optimal function.
2Stability of the object's composition
If traditional fusion cage surgery is performed with two fusion cages, then spinal stability is improved, but the operation becomes complicated and difficult
Solution Approach 1:
The invention merges the functions of two separate fusion cages into a single integrated device. This unified structure maintains the spinal stability benefits of dual-cage construction while simplifying the surgical procedure. The combined design reduces the number of implantation steps, minimizes surgical trauma, and improves operational efficiency without compromising structural support.
Solution Approach 2:
The single fusion cage is designed to perform multiple functions that were previously distributed across two separate devices. It simultaneously provides structural support, promotes bone growth, and ensures spinal stability, thereby reducing surgical complexity while maintaining therapeutic effectiveness.
3Reliability
If bone grafting is required for fusion, then fusion effect can be achieved, but postoperative recovery is slow
Solution Approach 1:
The bone trabecular material in the fusion cage is designed to self-integrate with the surrounding bone tissue without requiring additional bone grafting procedures. The trabecular structure naturally promotes bone ingrowth and biological integration, allowing the device to serve its own fixation and fusion functions. This self-integrating capability eliminates the need for separate bone grafting steps and accelerates postoperative recovery.
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 solution enables faster patient recovery, improved bone fusion, and reduced surgical difficulty by allowing bone ingrowth and integration, providing a safer and more effective fusion outcome compared to traditional methods.
Implementation Method 1
a side wall of the bone trabecular housing is provided with a plurality of pores, and sclerotin can grow into the bone trabecular housing through the pores to securely fix the bone trabecular fusion cage in the intervertebral disc
Implementation Method 2
a liner made of polyether-ether-ketone material and fixed in the accommodating space of the bone trabecular housing, wherein the polyether-ether-ketone liner can provide good elastic modulus of bone
Data Source
AI summary
A bone trabecular fusion cage for implanting into an intervertebral disc is disclosed. The fusion cage includes a bone trabecular housing made of titanium alloy powder material with trabecular housing accommodation space therein. A side wall of the bone trabecular housing is provided with a plurality of pores, and sclerotin can grow into the bone trabecular housing through the pores to securely fix the bone trabecular fusion cage in the intervertebral disc; and a liner made of polyether-ether-ketone material and fixed in the accommodating space of the bone trabecular housing, wherein the polyether-ether-ketone liner gpores can provide good elastic modulus of bone. With the product of the present disclosure, bone implantation is not required, the patient recovers fast, and excellent fusion effect can be obtained.