One-Piece Pelvic Endoprosthesis for Acetabulum and Ilium Reconstruction
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Solution Overview
Problem
Current endoprostheses for the pelvic bone often require extensive replacements and fail to effectively stabilize and load-bear both the acetabulum and ilium sections, especially in cases of severe bone defects or injuries, limiting flexibility and mobility.
Innovation Solution
A one-piece endoprosthesis design featuring a first part-spherical depression for the acetabulum and a second part-spherical depression for the ilium, with a flattened edge and fastening tabs, allowing secure anchoring and distribution of loads across the pelvic bone, and optionally including dent-like recesses for improved fixation and a material-saving opening for better surgical alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate acetabulum replacement and ilium replacement procedures are performed, then each bone defect can be addressed, but the number of surgical procedures and implantation time increases
Solution Approach 1:
The patent combines two separate replacement procedures (acetabulum replacement and ilium replacement) into a single integrated endoprosthesis. The one-piece design allows both the acetabulum component and the ilium replacement component to be implanted simultaneously in one surgical procedure, reducing implantation time while maintaining the ability to address both bone defects effectively.
2Loss of time
If a one-piece endoprosthesis design is used, then implantation time is reduced, but the manufacturing complexity and precision requirements increase
Solution Approach 1:
While the endoprosthesis is manufactured as a one-piece component, the design incorporates distinct functional sections: an acetabulum replacement component with a spherical depression for the ball joint, and an ilium replacement component with an articulation surface. This segmentation of functions within a unified structure allows for standardized manufacturing processes while maintaining the precision needed for both joint surfaces.
3Adaptability or versatility
If extensive bone replacements are performed, then severe bone defects can be addressed, but the surgical complexity and operation difficulty increase
Solution Approach 1:
The integrated one-piece endoprosthesis combines multiple replacement functions into a single implantable component. By merging the acetabulum replacement and ilium replacement into one device, the surgical procedure is simplified compared to performing separate implantations, reducing surgical complexity while maintaining the capability to address extensive bone defects in both locations.
Data Source
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AI summary
The aim is to specify an endoprosthesis for the partial replacement of the human pelvic bone (B) in the region of the acetabulum and the ilium (I1), with which bone replacement and stabilization can be achieved with a single prosthesis in the region of both the acetabulum and for defective sections of the ilium (I1), which in other words is suitable with a single part to restore the stability and load-bearing capacity of this skeletal section even in the case of larger bone defects in the pelvic region and to maintain joint mobility and movement in this area.To redesign, such an endoprosthesis is proposed with a first section (23) having a first semi-spherical depression (22) which serves as a replacement for the acetabulum, and with a second section (24) for the attachments on the ilium (I1), characterized in that the second section (24) extends flattened from the first section (23) over the edge of the first semi-spherical depression (22) and is integrally connected to the first section (23), and that a second semi-spherical depression (25) is provided in the second section (24).