Tibial Baseplate Asymmetric Periphery Design
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Solution Overview
Problem
Current tibial baseplates for knee prostheses often fail to provide a precise fit for unique patient anatomies, leading to suboptimal coverage and potential surgical complications due to standardization issues.
Innovation Solution
Designing a family of tibial baseplates with unique, non-congruent peripheries that can be categorized into special patient populations, featuring asymmetrical designs with varying anteroposterior and mediolateral extents, and specific orientations to align with the anatomical geometry of the tibia, ensuring maximum coverage and proper rotational alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a standardized tibial baseplate design is used, then manufacturing cost and complexity are reduced, but the fit precision and coverage accuracy for unique patient anatomies deteriorate
Solution Approach 1:
The tibial baseplate is segmented into modular components including a baseplate body, peripheral extension elements, and orientation guides. Each element can be independently designed and assembled to match specific patient anatomy requirements while maintaining manufacturing efficiency through modular production.
Solution Approach 2:
Different regions of the tibial baseplate are designed with locally optimized properties - the peripheral extension elements have specific geometries tailored to match particular patient anatomies, while the baseplate body maintains standardized features for consistent manufacturing. This allows precise local fit without requiring complete customization of the entire baseplate.
2Manufacturing precision
If unique tibial baseplate peripheries are designed for special patient populations, then the coverage accuracy and anatomical fit are improved, but the manufacturing cost and time required increase
Solution Approach 1:
The tibial baseplate incorporates asymmetric peripheral extension elements that are mirror-imaged or rotated versions of standardized geometries. This allows customization for different patient anatomies using the same basic design template, reducing manufacturing complexity while achieving accurate anatomical fit.
Solution Approach 2:
The baseplate design extends into additional spatial dimensions by incorporating peripheral extension elements that project beyond the standard baseplate boundary. These extensions can be oriented in multiple directions (medial, lateral, anterior, posterior) to match complex patient anatomies without requiring entirely new baseplate designs.
3Area of stationary object
If the tibial baseplate periphery is modified to match unique patient anatomies, then the coverage and fixation are improved, but the rotational alignment precision may be compromised
Solution Approach 1:
Orientation guides and alignment features are pre-integrated into the baseplate design before implantation. These features include reference marks, geometric constraints, and mechanical guides that ensure correct rotational alignment is achieved automatically during the surgical procedure, eliminating the need for post-implantation adjustment.
Solution Approach 2:
Orientation guides act as intermediary elements between the standardized baseplate and the unique patient anatomy. These guides translate the generic baseplate design into precise rotational alignment for the specific patient by mediating between the two different geometries through controlled interaction during implantation.
Data Source
AI summary
A family of tibial baseplates can comprise a plurality of tibial baseplates. Each of the plurality of tibial baseplates can define a common nominal baseplate size and a unique, non-congruent tibial baseplate periphery as compared to the other tibial baseplates of the family of tibial baseplates.