Ceramic Acetabular Liner with Metal Ring Lead-in Surface
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Solution Overview
Problem
Current acetabular prosthetic components in hip arthroplasty procedures often have semi-hemispherical geometries that may not provide optimal joint stability, particularly in patients requiring enhanced range of motion and support.
Innovation Solution
The development of a modular acetabular prosthesis system that includes a ceramic acetabular shell liner with a metal ring affixed to it, where the metal ring encircles the liner and provides a lead-in surface for alignment and reinforcement, allowing for the augmentation of the liner's geometry to over-hemispherical shape, enhancing joint stability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a standardized ceramic acetabular shell liner is used, then manufacturing efficiency is improved, but adaptability to different patient needs deteriorates
Solution Approach 1:
The acetabular prosthesis is divided into separate components: a standardized ceramic shell liner and a modular metal ring augmentation component. The metal ring can be selectively added to specific standardized liners based on patient anatomy and surgical requirements, allowing customization without requiring multiple unique liner designs.
Solution Approach 2:
The metal ring augmentation component is designed to fit over and encircle the standardized ceramic shell liner, with the liner nested within the ring assembly. This nested configuration allows the standardized liner to be combined with optional augmentation elements to achieve customized geometry.
2Stability of the object's composition
If the acetabular shell liner geometry is augmented to over-hemispherical shape, then joint stability is improved, but device complexity increases
Solution Approach 1:
The over-hemispherical geometry is achieved by segmenting the design into a basic hemispherical ceramic liner and a separate metal ring augmentation component. The ring is configured with specific geometric features that, when combined with the liner, create the desired over-hemispherical shape without modifying the liner manufacturing process.
Solution Approach 2:
The metal ring serves as an intermediary component that modifies the geometry of the standardized ceramic liner. Rather than directly manufacturing complex over-hemispherical liners, the metal ring acts as a geometric mediator that transforms the basic hemispherical shape into the required over-hemispherical configuration.
3Strength
If a metal ring is added to encircle the ceramic liner, then reinforcement and alignment are improved, but device complexity increases
Solution Approach 1:
The metal ring is designed to perform multiple functions simultaneously: it reinforces the ceramic liner structurally, provides alignment features through integrated lead-in surfaces, and enables geometric augmentation. By consolidating these functions into a single component, the overall device complexity is minimized despite the added functionality.
Solution Approach 2:
Multiple functional features are merged into the metal ring component: structural reinforcement, alignment guidance via lead-in surfaces, and geometric augmentation. This consolidation reduces the number of separate components needed compared to providing each function through separate elements.
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 modular acetabular prosthesis system improves joint stability and range of motion by allowing the acetabular shell liner to be manufactured in a standardized shape with various metal ring augmentations, providing enhanced support and flexibility tailored to individual patient needs.
Implementation Method 1
The metal ring includes a proximal rim shaped to define a lead-in surface that aligns the acetabular shell liner assembly with the acetabular shell as the acetabular shell liner assembly is inserted into the acetabular shell
Implementation Method 2
The metal ring may be press fitted onto the ceramic acetabular shell liner component
Data Source
AI summary
An acetabular prosthesis for use in a hip arthroplasty surgical procedure is disclosed. The acetabular prosthesis includes an acetabular liner assembly to be secured to an acetabular shell component. The acetabular liner assembly includes a ceramic acetabular shell liner component. The acetabular liner assembly also includes a metal ring affixed to and encircling the ceramic acetabular shell liner component. The metal ring includes a proximal rim shaped to define a lead-in surface.