Proximal Tibia Plate Extension Arm for Posterolateral Fracture Fixation
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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, and a lateral elongated hole, along with a clamping tool to apply compression and secure the fracture, allowing for flexible and adaptable fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lateral proximal tibia plate is used to treat fractures in the posterolateral corner, then fixation effectiveness is improved, but surgical approach difficulty increases due to surrounding soft tissues such as arteries and nerves
Solution Approach 1:
The plate is divided into distinct functional segments: a head portion with screw holes for fracture fixation, a body portion extending along the tibia, and an extension arm reaching toward the posterolateral corner. This segmentation allows each portion to address specific anatomical challenges while maintaining overall fixation effectiveness.
Solution Approach 2:
The extension arm adds a third-dimensional component to the plate design, extending posteriorly and laterally to reach the difficult-to-access posterolateral corner without requiring direct anterior exposure. This dimensional extension allows surgeons to address posterior fractures through a lateral approach, avoiding dissection through arteries and nerves.
2Area of stationary object
If the plate extends along the articular rim and engages the posterior of the tibia, then coverage and support are improved, but device complexity increases
Solution Approach 1:
The plate design integrates multiple functions into a single device: the head provides fracture fixation, the body offers longitudinal support along the tibia, and the extension arm reaches the posterolateral corner. This multi-functional design achieves comprehensive coverage without requiring multiple separate implants or complex assembly procedures.
Solution Approach 2:
The plate features a curved extension arm that follows the natural contour of the posterolateral tibia and articular rim. This curvature allows the plate to conform to the complex three-dimensional anatomy, maximizing contact area and support while maintaining a relatively simple single-piece construction.
3Manufacturing precision
If screw holes are positioned to capture fractured bone fragments, then fracture reduction and fixation are improved, but risk to surrounding soft tissues increases
Solution Approach 1:
The plate serves as an intermediary structure that provides a stable platform for screw insertion, allowing precise fracture fixation without requiring direct manipulation or extensive dissection of surrounding soft tissues. The plate's rigid structure enables accurate screw placement while protecting arteries and nerves from iatrogenic injury during the fixation process.
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.