Pelvic Implant Socket With Reshapable Brackets for Bone Fit
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Solution Overview
Problem
Existing hip joint implants face a conflict between the need for robust and cost-effective anchoring to the pelvic bone, which is often damaged, and the requirement for good reshapeability to adapt to individual anatomical variations, with materials like TiAl6V4 being too rigid and titanium too malleable.
Innovation Solution
A hip joint implant design using fastening brackets made of a reshapeable biocompatible material, such as titanium, connected to a stiffer socket via a cohesive bond, allowing intraoperative adaptation to the pelvic bone's shape, combined with a modular socket system for enhanced stability and fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If TiAl6V4 material is used for fastening brackets, then robustness and cost-effectiveness are improved, but reshapeability deteriorates
Solution Approach 1:
The implant is divided into two distinct components: a socket made of robust TiAl6V4 material and fastening brackets made of reshapeable pure titanium. This segmentation allows each component to be optimized for its specific function - the socket for load-bearing robustness and the brackets for adaptability during implantation.
Solution Approach 2:
Different material properties are assigned to different parts of the implant system. The socket region requires high strength and dimensional stability, so TiAl6V4 is used there. The fastening bracket region requires reshapeability for adaptation to damaged bone, so pure titanium is used there. This local differentiation of material quality resolves the contradiction between robustness and reshapeability.
2Adaptability or versatility
If pure titanium is used for fastening brackets, then reshapeability is improved, but dimensional stability deteriorates
Solution Approach 1:
The implant system is segmented into a socket component and fastening bracket component, each with different material properties. The socket made of TiAl6V4 provides the required dimensional stability and robustness, while the separate fastening brackets made of pure titanium provide the needed reshapeability without compromising overall system stability.
Solution Approach 2:
The implant system uses a composite material approach by combining two different titanium-based materials (TiAl6V4 alloy and pure titanium) in a single implant system. This allows the system to exhibit both the dimensional stability of the alloy and the reshapeability of the pure metal, resolving the contradiction between these two properties.
3Strength
If TiAl6V4 material is used for the socket, then robustness and dimensional stability are improved, but reshapeability deteriorates
Solution Approach 1:
The implant is segmented into a socket made of robust TiAl6V4 material that does not require reshaping, and separate fastening brackets made of reshapeable pure titanium. This segmentation allows the socket to provide structural robustness and dimensional stability while the brackets provide adaptability for securing the implant to damaged bone.
Solution Approach 2:
Different material qualities are applied locally: TiAl6V4 with high strength and dimensional stability is used for the socket where load-bearing capacity is critical, while pure titanium with high reshapeability is used for the fastening brackets where adaptation to bone anatomy is critical. This local quality differentiation resolves the contradiction.
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 provides secure anchoring and improved fit to the pelvic bone by allowing manual reshaping during surgery, ensuring robustness and adaptability, while maintaining dimensional accuracy and stability under load.
Implementation Method 1
the fastening brackets are made of a reshapeable (cold-formable) substantially biocompatible material and are connected to the socket via a cohesive bond
Data Source
Figure 1
Figure 2A~2B
Figure 3A
AI summary
A pelvic implantation device that includes at least two outwardly directed, flat, fastening brackets (2, 102, 3, 103) arranged at an edge of a fastening ring (4, 104), the fastening ring forming an opening (40, 140); and a socket support body (6, 106) that includes a convex outer face (65) configured to contact a pelvic bone; a distal edge (160A) that extends substantially orthogonally from a circumferential surface of the socket support body; and a tab (170), wherein the tab forms a portion of the circumferential surface of the socket support body, the tab including a proximal edge (160B) that extends substantially orthogonally from a surface of the tab, wherein the distal edge and the proximal edge are configured to contact an upper surface of the fastening ring.