Modular Acetabular Implant Assembly for Bone Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current orthopaedic surgical implant systems for acetabular revision surgery face challenges with limited structural strength due to the use of cemented cup implants and long manufacturing lead times and high costs associated with patient-specific custom implants.
Innovation Solution
A modular orthopaedic prosthetic system comprising a plate with a central ring and flanges, and an acetabular shell component with a distal rim, convex outer wall, and circumferential lip, where the plate is secured to the shell component using fasteners, allowing for adjustable lateralization and inclination, and optionally including a spacer ring for further adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cemented acetabular cup implant combined with a cage device is used to address severe acetabular bone loss, then the implant can be installed in patients with bone loss or poor bone quality, but the structural strength is limited
Solution Approach 1:
The implant is divided into separate modular components: a plate with flanges for bone engagement, an acetabular shell component for the joint interface, and optional spacer rings. This segmentation allows each component to be optimized for its specific function while collectively providing both adaptability to bone loss and structural strength through rigid fixation to remaining bone structures.
2Adaptability or versatility
If a patient-specific custom tri-flange acetabular cup implant is used to address severe acetabular bone loss, then the implant can be customized to fit patient anatomy, but the manufacturing lead time is long and expense is high
Solution Approach 1:
The implant design uses standardized modular components that can be universally applied across different patients. The plate comes in various sizes and configurations, and the shell component offers different orientations and positions, allowing the system to adapt to diverse patient anatomies without requiring custom manufacturing for each case.
Solution Approach 2:
The implant system incorporates adjustable and configurable elements that allow intraoperative customization. The modular design enables surgeons to select and combine different components during surgery to achieve the optimal fit for each patient's specific anatomy, providing customizability without the long lead times of pre-manufactured patient-specific implants.
3Adaptability or versatility
If a patient-specific custom tri-flange acetabular cup implant is used to address severe acetabular bone loss, then the implant can be customized to fit patient anatomy, but the expense is high
Solution Approach 1:
The implant system uses standardized modular components that can be mass-produced through conventional manufacturing processes. The plate, shell component, and spacer rings are designed as universal parts that can be manufactured efficiently using established techniques, significantly reducing the cost compared to custom patient-specific implants while still providing adequate adaptability through size and configuration variations.
4Adaptability or versatility
If a cemented acetabular cup implant is used in revision surgery, then the implant can be installed in patients with damaged bone, but bone cement may have limited structural strength
Solution Approach 1:
The design extracts and eliminates the bone cement component from the fixation system. Instead of relying on cement for structural strength, the implant uses a plate with flanges that can be directly fixed to remaining bone structures with screws or other mechanical fixation methods, providing superior structural strength while still enabling installation in patients with damaged bone.
Data Source
AI summary
An orthopaedic prosthetic system includes a plate having one or more flanges and an acetabular shell component. Each flange includes a surface configured to engage a patient's bone. The plate also includes a central ring that engages a lip extending from an outer surface of the shell component. The ring may be mechanically attached to the lip using multiple fasteners. The system may include multiple plates each having a different configuration from other plates, and may also include multiple shell components each having a different configuration from other shell components. Methods for assembling and using the prosthetic system are also disclosed.