Distal Fibula Implant with Tendon Channels for Ankle Reconstruction
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Solution Overview
Problem
Current total ankle arthroplasty procedures are contraindicated in patients without a distal fibula, and the increasing prevalence of ankle arthritis necessitates a solution for distal fibula replacement to facilitate ankle joint reconstruction.
Innovation Solution
A specially designed apparatus with a proximal and distal portion, featuring channels for tendon accommodation, apertures for syndesmosis fixation, and contoured holes for fibula engagement, allowing for secure attachment and tendon support, enabling distal fibula replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If total ankle arthroplasty is performed, then ankle joint reconstruction is achieved, but the procedure is contraindicated in patients without a distal fibula
Solution Approach 1:
The patent introduces a distal fibula replacement apparatus as an intermediary structure that mediates between the absent fibula and the requirements for TAA procedure. This artificial replacement provides the necessary structural support and attachment points for ligaments and tendons, enabling TAA to be performed in patients who would otherwise be contraindicated.
Solution Approach 2:
The invention changes the physical parameters of the fibula region by introducing an artificial replacement structure with specific geometric features (contoured proximal portion, channels, apertures) that replicate the functional parameters of a natural fibula, thereby enabling procedures that require fibular presence.
2Strength
If a distal fibula replacement apparatus is designed with multiple fixation features, then secure attachment to fibula and tibia is achieved, but device complexity increases
Solution Approach 1:
The patent combines multiple fixation functions into a single integrated apparatus. The contoured proximal portion, channels for peroneal tendons, and apertures for syndesmosis fixation are merged into one cohesive structure that simultaneously provides structural replacement, tendon routing, and multiple attachment points, reducing the need for separate fixation devices.
Solution Approach 2:
The distal fibula replacement apparatus serves multiple functions simultaneously: it acts as a structural replacement for the fibula, provides routing channels for peroneal tendons, offers apertures for syndesmosis fixation, and enables attachment to both fibula and tibia. This multi-functionality reduces overall system complexity by consolidating what would otherwise require multiple separate components.
3Shape
If channels are added to accommodate peroneal tendons, then anatomical accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates tendon accommodation channels into the apparatus design during manufacturing, rather than creating them during surgery. The channels are pre-formed with appropriate contours, angles, and dimensions to match anatomical requirements, eliminating the need for complex intraoperative tendon routing and reducing surgical complexity.
Data Source
AI summary
Apparatuses for distal fibula replacement and related methods are described herein. The apparatus generally includes an implantable stem component including a proximal portion that is contoured to have an anterior overlap with a portion of a fibula bone of a patient, and a distal portion that defines a first channel configured to receive a peronaeus brevis tendon and a further defines second channel configured to receive a peronaeus longus tendon. Related methods include placing such an apparatus on the portion of the fibula bone of the patient.