Adjustable Cut Guide Attachment for Tibial Prosthesis
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Solution Overview
Problem
Existing provisional tibial prosthesis systems fail to provide insight into knee joint kinematics for angled bone cuts and require a high number of components for proper configuration, lacking real-time force or pressure data for knee joint balance.
Innovation Solution
A tibial prosthesis system with adjustable shim components and cut guides that allow for angled resections, providing real-time balance testing and reducing the number of provisional components needed by offering adjustable spacing and alignment mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high number of provisional components are used to achieve proper configuration, then the knee joint kinematics can be replicated, but the device complexity and surgical procedure complexity increase
Solution Approach 1:
The patent combines multiple provisional components into a single integrated provisional tibial prosthesis system that can replicate various knee joint kinematics. The system integrates the bearing component, base component, and shim component into one unified prosthesis that can be adjusted to represent different bone cut angles and configurations, eliminating the need for stacking multiple separate provisional components.
Solution Approach 2:
The provisional tibial prosthesis system incorporates adjustable features including a reconfigurable base component with adjustable positioning elements and a shim component with varying thicknesses that can be inserted to adjust the relative position of the bearing component. This dynamic adjustability allows the single prosthesis to replicate multiple knee joint kinematics configurations without requiring multiple fixed provisional components.
2Reliability
If existing provisional systems are used, then the basic prosthesis function is provided, but real-time force or pressure data for knee joint balance testing is not available
Solution Approach 1:
The patent incorporates sensors within the provisional tibial prosthesis system that can detect and provide real-time feedback on force and pressure data during knee joint balance testing. The sensors are integrated into the prosthesis components and can transmit data about the forces acting on the knee joint during movement, enabling surgeons to assess knee joint balance in real-time without requiring separate measurement devices.
3Measurement precision
If provisional components are used to test and fit permanent prosthesis, then the permanent prosthesis configuration can be determined, but the number of additional resections required on the tibia increases
Solution Approach 1:
The provisional tibial prosthesis system is designed to simulate and test various permanent prosthesis configurations and bone cut angles before the actual permanent implantation and bone resections are performed. By using the adjustable prosthesis to pre-determine the optimal configuration and required resection angles, surgeons can plan and execute the permanent surgery with fewer and more precise resections, reducing the overall quantity of bone removal required.
Data Source
AI summary
Tibial prosthesis systems for implantation or use in a knee joint are disclosed. A tibial prosthesis system for implantation on a resected tibia can include a bearing component, a base component, and a shim component. The insertion of the shim component can provide spacing adjustment between the bearing and base components. The shim component can have a generally uniform height or thickness, or a variable height. A cut guide attachment, removably attachable to the prosthesis system, can be used to facilitate further resection of the tibia and create one or more additional resection surfaces on the tibia at an angle relative to the first resection surface. Multiple cut guide attachments can be available to the user to provide various resection angles. The cut guide attachment can include a modular design. The cut guide attachment can be configured to adjust the angle of the subsequent resection in at least one direction.