Lateral Proximal Tibia Plate With Extension Arm for Posterolateral Access
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Solution Overview
Problem
Treatment of fractures in the posterolateral corner of the proximal tibia is challenging due to surrounding soft tissues such as arteries and nerves, making it difficult to approach such fractures, especially in complex fractures where treatment in a supine position is preferred.
Innovation Solution
A lateral proximal tibia plate with an extension arm that includes a head extending along the articular rim of the tibia, a body with screw holes, a longitudinal elongated hole, and an extension arm with screw holes, allowing for flexible fixation and reduction of fractures using a clamping tool for posterior-to-anterior compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a lateral proximal tibia plate is used to treat fractures in the posterolateral corner, then fixation capability is improved, but surgical approach difficulty increases due to surrounding soft tissues such as arteries and nerves
Solution Approach 1:
The plate design extends into the posterolateral corner region through an extension arm that reaches around the posterior aspect of the tibia, accessing the fracture site from a different spatial dimension. This allows fixation of posterolateral fractures without requiring direct anterior or lateral surgical approaches that would endanger surrounding neurovascular structures.
2Adaptability or versatility
If the plate extends along the articular rim to capture fracture fragments, then fixation coverage is improved, but plate complexity increases
Solution Approach 1:
The plate is divided into distinct functional segments: a head portion with a row of holes for capturing articular fracture fragments, a body portion for securing the plate to the tibial shaft, and an extension arm with additional holes for posterolateral fixation. This segmentation allows each portion to be optimized for its specific function while maintaining overall adaptability.
Solution Approach 2:
The plate design incorporates multiple rows of holes and an extension arm that can accommodate various screw configurations and trajectories, enabling the same plate to treat different fracture patterns and anatomical variations. The extension arm can engage the posterior tibia while the head captures articular fragments, providing multi-functional fixation capability.
3Reliability
If an extension arm is added to engage the posterior of the tibia, then fixation stability in challenging locations is improved, but device complexity increases
Solution Approach 1:
The extension arm is integrated into the same plate structure as the head and body portions, combining multiple fixation functions into a single device. This merging eliminates the need for separate fixation devices or staged procedures, achieving reliable posterolateral fixation while maintaining a unified, manageable device architecture.
Data Source
AI summary
A method for treating an articular fracture of a tibia using a tibia plate with an extension arm, including: making an incision to expose the tibia; reducing the articular fracture of the tibia; contouring the tibia plate to fit the tibia; preliminarily fixing the tibia plate to the tibia; placing a screw partially into the tibia through a lateral elongated hole in the tibia plate; applying compression between a plate screw hole in the extension arm and an anterior surface of the tibia; and placing additional plate screws in the tibia through additional screw holes in the tibia plate.