Angled Tibial Augment Block Fixation for Osteotomy Stability
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Solution Overview
Problem
The stability of the connection between the insert and the tibia during high tibial osteotomy surgery is inadequate, affecting the recovery speed and stability of the knee joint.
Innovation Solution
A tibial augment block with a connector forming a specific included angle with the tibial osteotomy area, enhancing the connection strength through frictional forces, and featuring a design that integrates with the tibia's shape for improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a connector is arranged at a certain included angle with the tibial osteotomy area, then the connection strength between the insert and tibia is improved through increased frictional force, but the device complexity increases due to the specific angular orientation requirement
Solution Approach 1:
The connector is designed with a specific included angle (α) relative to the upper end surface of the tibial osteotomy area, where 45° ≤ α ≤ 60°. This parameter optimization ensures that when the insert moves away from the tibia, a thrust perpendicular to the connector's axial direction generates sufficient frictional force between the connector and tibia, thereby maximizing connection strength without requiring overly complex structural modifications
Solution Approach 2:
The connector is positioned at an inclined angle rather than perpendicular to the bone surface, utilizing the third dimension (angular orientation) to generate frictional resistance. This angular arrangement transforms the force vector components, creating both axial support and lateral frictional engagement with the tibia, thereby improving connection strength through spatial optimization
2Reliability
If the insert is designed to remain in place for future treatments without removal, then the reliability of long-term stability is improved, but the ease of operation for future procedures is reduced
Solution Approach 1:
The connector is designed to self-lock within the tibia through frictional engagement generated by the inclined angle. The frictional force between the connector and tibia naturally prevents loosening or backout, eliminating the need for additional locking mechanisms or complex fixation systems. This self-service approach ensures long-term stability while maintaining simplicity for future surgical procedures
Solution Approach 2:
The connector is pre-configured with the optimal included angle during manufacturing, ensuring that upon insertion, it automatically generates the necessary frictional force for stable fixation. This preliminary angular configuration eliminates the need for intraoperative adjustment and ensures reliable long-term stability from the moment of implantation, facilitating straightforward future treatments
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 connector's angled design increases frictional force, preventing separation of the insert from the tibia, ensuring stable connection and facilitating future treatments without removal, thus enhancing recovery and stability.
Implementation Method 1
a frictional force between the connector and the tibia is greatly increased
Data Source
AI summary
Provided is a tibial augment block, including an insert. The insert is arc-shaped, a convex side of the insert is provided with a connecting plate for being connected to an outer wall of tibia, a connecting hole facing the tibia is formed in the connecting plate, a certain included angle is formed between an axis of the connecting hole and each of upper and lower end surfaces of a tibial osteotomy area, and a connector for connecting the tibia is arranged in the connecting hole. The connecting hole is provided to make the connector form a certain angle with each of the upper and lower end surfaces of the osteotomy area.