Bone Defect Implant with Composite Metallic-Ceramic Structure
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Solution Overview
Problem
Current methods for treating bone defects in hip revision surgery face challenges such as insufficient mechanical stability, limited biological reconstruction, and complex surgical handling, particularly with metallic augmentation materials and bone chips, which often result in incomplete fixation and risk of infection.
Innovation Solution
An implant comprising osteoconductive supporting bodies made of apatite or tricalcium phosphate, combined with an insertion aid for permanent or temporary holding, facilitating biological reconstruction and mechanical stability, and a kit including these components for surgical use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metallic augmentation materials are used, then good fixation and restoration of joint center are achieved, but biological reconstruction does not occur and the material remains unchanged in the body
Solution Approach 1:
The implant combines metallic components with ceramic components (apatite or tricalcium phosphate) to create a composite structure that provides both mechanical strength for fixation and osteoconductive properties for biological reconstruction. The metallic part ensures primary stability while the ceramic part promotes secondary stability through bone ingrowth.
Solution Approach 2:
Different parts of the implant have different material properties optimized for their specific functions. The metallic augmentation material provides structural support and fixation in areas requiring strength, while the ceramic material provides osteoconductive surfaces in areas where bone growth is needed, creating local quality differentiation.
2Reliability
If bone chips or shavings are used, then biological reconstruction is enabled, but mechanical load-bearing capacity is limited and surgical handling is complex
Solution Approach 1:
The implant uses a composite of metallic and ceramic materials where the ceramic component (apatite or tricalcium phosphate) provides osteoconductive properties similar to bone chips but with superior mechanical strength and structural integrity, eliminating the need for complex surgical handling of loose bone particles.
Solution Approach 2:
The implant uses commercially available ceramic materials that can be processed into standardized forms, replacing the need for complex intraoperative preparation of allogeneic bone chips from femoral heads, simplifying the surgical procedure while maintaining biological reconstruction capabilities.
3Strength
If metallic augmentation materials are used, then good fixation is achieved, but the material is not moldable and the defect must be adapted to the material
Solution Approach 1:
The implant design allows different portions to be customized - the metallic component can be adapted to provide structural support while the ceramic component can be shaped to fit specific defect geometries, enabling local adaptation to various bone defect shapes and sizes.
4Strength
If metallic augmentation materials are used, then good fixation is achieved, but the material is not processable and cannot be used as a base for repeated revision
Solution Approach 1:
The ceramic component (apatite or tricalcium phosphate) can be processed more easily than metallic materials and can serve as a base for subsequent revisions. The composite structure allows the ceramic part to be replaced or modified in revision surgeries while maintaining the overall implant function.
Data Source
AI summary
An implant for treating a bone defect wherein the implant comprises osteoconductive supporting bodies and an insertion aid. The insertion aid is designed for insertion of the osteoconductive supporting bodies into a bone defect and for holding together the osteoconductive supporting bodies. Also disclosed is a kit comprised of an implant for treating a bone defect.