Composite Orthopaedic Implant for Critical Bone Voids
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Solution Overview
Problem
Standard orthopaedic implants are inadequate for filling uniquely-shaped and critically-sized bone voids, as they fail to provide sufficient structural support and promote effective bone regeneration, especially in cases where natural bone cannot fill the void naturally.
Innovation Solution
The use of orthopaedic implants comprising an open porous metal component and a resorbable bone growth promoting component, with alternating layers that provide structural support and an osteoconductive/osteoinductive matrix to promote bone regeneration, allowing for customization to fit specific bone voids and locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard orthopaedic implants are used to fill bone voids, then the device structure is simple and easy to manufacture, but the implants fail to provide sufficient structural support and promote effective bone regeneration in critical-sized voids
Solution Approach 1:
The implant combines porous metal (providing structural support and mechanical strength) with resorbable bone growth promoting component (providing osteoconductive and osteoinductive properties). This composite structure allows the implant to simultaneously provide mechanical support for critical-sized voids while promoting effective bone regeneration, resolving the contradiction between reliability and simplicity.
Solution Approach 2:
The implant is divided into multiple functional layers: a porous metal layer for structural support and a resorbable bone growth promoting layer for biological activity. This segmentation allows each layer to perform its specific function optimally, with the porous metal providing immediate structural integrity and the resorbable layer promoting bone regeneration over time.
2Adaptability or versatility
If a single-layer implant structure is used, then the manufacturing process is simple, but the implant cannot simultaneously provide structural support and promote bone growth in uniquely-shaped and critically-sized bone voids
Solution Approach 1:
The implant consists of multiple alternating layers of porous metal and resorbable bone growth promoting component. This segmented structure allows the implant to adapt to uniquely-shaped and critically-sized bone voids by providing both structural support and biological activity in different regions, while the modular layering simplifies the manufacturing process.
Solution Approach 2:
The multi-layered implant structure performs multiple functions simultaneously: the porous metal layers provide structural support and mechanical strength, while the resorbable layers provide osteoconductive and osteoinductive properties. This multi-functionality allows a single implant design to address various bone void configurations and sizes.
3Reliability
If porous metal layers are spaced apart to include resorbable bone growth promoting component, then bone regeneration is promoted through osteoconductive and osteoinductive matrix, but the device structure becomes more complex with multiple alternating layers
Solution Approach 1:
The implant uses composite materials where porous metal provides structural framework and resorbable bone growth promoting component provides biological activity. The alternating layers create a composite structure that leverages the advantages of both materials: mechanical strength from metal and osteogenic properties from the resorbable component.
Solution Approach 2:
The porous metal layers provide a three-dimensional framework with high surface area and interconnected pores, allowing bone ingrowth and vascularization. The spacing between porous metal layers accommodates the resorbable bone growth promoting component, creating channels for nutrient transport and waste removal while maintaining structural integrity.
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
These implants offer effective structural support and promote bone regeneration by providing a matrix for ingrowth and vascularization, enabling the filling of critical-sized bone voids and facilitating the growth of new bone tissue, thus addressing the limitations of standard implants.
Implementation Method 1
an osteoconductive and / or osteoinductive matrix for promoting bone re-growth within bone voids
Implementation Method 2
an osteoconductive and / or osteoinductive matrix for promoting bone re-growth within bone voids
Implementation Method 3
an open porous metal component... The porous metal component includes a first porous metal layer spaced apart from a second porous metal layer
Implementation Method 4
the first and the second porous metal layers of the porous metal component comprise a coefficient of friction which is greater than the resorbable bone growth promoting component and greater than mammalian bone tissue
Data Source
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AI summary
An orthopaedic implant for filling voids in bones, and methods of using the same. The orthopaedic implant comprises an open porous metal component, having pores for promoting bone regeneration, and a resorbable bone growth promoting component which is resorbed into new bone. The orthopaedic implant and methods of the present disclosure provide structural support for the bone as well as osteoconductive and / or osteoinductive matrix for promoting bone re-growth within bone void. Advantageously, the orthopaedic implants and methods disclosed herein are useful in filling critically sized bone voids.