Convertible Orthopaedic Implant Offset Design for Shoulder Conversion
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Solution Overview
Problem
Existing orthopaedic implant systems fail to effectively address bone defects and restore joint functionality, particularly in the glenoid bone, leading to joint instability and pain, and often require multiple surgical procedures due to limited adaptability.
Innovation Solution
A convertible orthopaedic implant system comprising a baseplate and a pad that can be configured to interface with a humerus, with the pad extending superiorly beyond the baseplate, allowing for a single system to be used in both anatomical and reverse shoulder procedures, utilizing a common baseplate and allowing for offset configurations to facilitate surgical conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single orthopaedic implant system is used for both anatomical and reverse shoulder procedures, then surgical adaptability and patient healing are improved, but the device complexity increases due to convertible configurations
Solution Approach 1:
The implant system is divided into separable components including a baseplate and a pad that can be independently positioned and configured. This segmentation allows the same baseplate to support different pad configurations for anatomical or reverse shoulder procedures, enabling versatility without requiring entirely different implant systems.
Solution Approach 2:
The implant system incorporates convertible configurations where the pad can be positioned in different locations relative to the baseplate (anatomical configuration with pad superior to baseplate, or reverse configuration with pad inferior to baseplate). This dynamic reconfigurability allows adaptation between different surgical procedures using the same implant system.
2Ease of operation
If the pad extends superiorly beyond the baseplate for anatomical configuration, then articulation with humerus is improved, but the device complexity increases due to offset centroid design
Solution Approach 1:
The pad is designed with an asymmetric extension where the second centroid is offset from the first centroid in the superior-inferior direction. This asymmetric geometry allows the pad to extend superiorly beyond the baseplate for proper articulation with the humerus in anatomical configurations, while the same offset design enables reconfiguration for reverse procedures.
3Reliability
If multiple surgical procedures are performed due to limited adaptability of existing implants, then proper joint repair can be achieved, but loss of time and increased patient trauma occur
Solution Approach 1:
The implant system is designed with multi-functionality to perform both anatomical shoulder replacement and reverse shoulder replacement procedures using the same baseplate and pad components. This universality eliminates the need for multiple separate surgical procedures and implant changes, reducing surgical time and patient trauma while maintaining effective joint repair.
4Adaptability or versatility
If the pad is releasably secured to the baseplate for conversion capability, then adaptability between procedures is improved, but reliability of secure attachment may be compromised
Solution Approach 1:
The pad is releasably secured to the baseplate through a secure attachment mechanism that allows for preliminary secure fixation during the primary surgical procedure. This preliminary secure attachment ensures reliability during anatomical configuration, while the releasable nature enables conversion to reverse configuration if needed, balancing both attachment reliability and adaptability.
Data Source
AI summary
This disclosure relates to orthopaedic implant systems and methods for restoring functionality to a joint. The implant systems disclosed herein include offset arrangements that may facilitate conversion of the implant system during a subsequent surgical procedure.