Small Joint and Bony Defect Replacement With 3D-Printed PEEK-Zeolite-Ion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current joint and bony segment replacements, including small and large joints, face imperfections in current iterations, particularly in reconstructive challenges due to bone loss, and lack customization in biologic microenvironment manipulation.
Innovation Solution
Utilizing additive manufacturing (3D printing) of anatomic constructs with PEEK/zeolite/ion (PZI) material, where different heavy metal ions provide varying properties to different surfaces, enhancing biologic microenvironment manipulation and customization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional materials (cadaveric sections, homologous anatomy, or 3D-printed titanium) are used for joint and bony segment replacement, then structural strength is achieved, but biologic activity and customization for microenvironment manipulation are insufficient
Solution Approach 1:
The patent applies local quality by incorporating different heavy metal ions (copper, zinc, silver, strontium, sodium) into specific regions of the PEEK/zeolite/ion composite material. Each ion provides distinct biologic properties at different surfaces - copper for soft tissue formation at cartilaginous surfaces, zinc and strontium for bony tissue formation at bone interfaces, silver for antimicrobial protection. This spatial differentiation of material properties enables customized biologic activity throughout the implant without compromising structural integrity.
Solution Approach 2:
The patent utilizes composite materials by combining PEEK (polyether ether ketone) with zeolite molecules and heavy metal ions to create a multi-functional material system. The PEEK provides structural strength and biocompatibility, the zeolite offers porosity and ion exchange capability, and the heavy metal ions contribute specific biologic activities. This composite structure resolves the contradiction by integrating multiple functions within a single implant material.
2Strength
If 3D-printed titanium is used for bony segment replacement, then structural strength and durability are improved, but biologic microenvironment manipulation and bone healing promotion are insufficient
Solution Approach 1:
The patent replaces monolithic titanium with a composite PEEK/zeolite/ion material system that provides both structural strength and biologic functionality. The PEEK component maintains mechanical integrity comparable to titanium, while the integrated zeolite and heavy metal ions add microenvironment manipulation capabilities that titanium lacks.
Solution Approach 2:
The patent applies local quality by distributing different heavy metal ions throughout the implant structure to provide site-specific biologic functions. Copper ions at articular surfaces promote soft tissue formation, zinc and strontium ions at bony surfaces enhance osteogenesis, and silver ions provide antimicrobial protection. This localized functional differentiation enables microenvironment manipulation without sacrificing overall structural strength.
3Ease of manufacture
If uniform material composition is used throughout the implant, then manufacturing simplicity is maintained, but surface-specific biologic functions and tissue integration are compromised
Solution Approach 1:
The patent applies local quality by incorporating different heavy metal ions into specific regions of the implant corresponding to different tissue interfaces. Copper ions are placed at cartilaginous surfaces for soft tissue formation, zinc and strontium ions are positioned at bone contact areas for osteogenesis, and silver ions are distributed for antimicrobial protection. The additive manufacturing process enables this spatial differentiation while maintaining manufacturing feasibility through digital material distribution control.
Solution Approach 2:
The patent utilizes parameter changes by varying the concentration and type of heavy metal ions at different locations within the implant. The additive manufacturing process allows precise control of ion distribution parameters, enabling different biologic activities at different surfaces while maintaining a unified manufacturing approach through digital modeling and layer-by-layer construction.
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
Customized implants with PZI material offer improved biologic activity, bone healing, antimicrobial properties, and structural strength, addressing reconstructive challenges in joint and bony segment replacements.
Implementation Method 1
The ion in the at least one PZI material may be sodium, and an ion exchange may result with a surrounding environment to provide uniform properties at all surfaces where the at least one PZI material is introduced
Implementation Method 2
The additive manufacturing may be 3D printing
Data Source
AI summary
Apparatus and methods for joint and bony segment replacement may utilize additive manufacturing (e.g., 3D printing) of various anatomic constructs with PEEK/zeolite/ion (PZI) material. Heavy metal ion loading options may be utilized which may provide differing properties to different surfaces of the resultant apparatus. Moreover, using the PZI material, the apparatus being implanted in joint and bony segment replacement may favorably manipulate the biologic microenvironment in which it may be implanted. Further, through use of PZI material, current large joint replacement options also may be disrupted including, but not limited to, modifications of the joint replacement itself, and the augments and supporting joint reconstruction devices used in bone loss situations. Methods for joint and bony segment replacement may provide mixing two or more types of PZI material together through an additive manufacturing process; and introducing the mixture as part of an implantable apparatus.