Detachable Knee Trial Adapter with Elastic Member
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Solution Overview
Problem
Conventional knee trials for total knee arthroplasty face challenges in accurately selecting the suitable implant size due to unstable coupling between the plate trial and insert trial, leading to prolonged surgery times and potential health risks for patients.
Innovation Solution
A detachable knee trial system featuring an adapter with an elastic member that securely couples and decouples the plate trial and insert trial, allowing for easy attachment and detachment, reducing the burden on surgeons and shortening surgery time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bolts or rods are used to fix the trials together, then the coupling strength is improved, but the attachment process requires excessive force and too much time
Solution Approach 1:
The coupling device is segmented into a body portion and a pressing portion that can move relative to each other, allowing the pressing portion to be applied independently to secure the trials without requiring complex fastening operations
Solution Approach 2:
A groove is introduced as an intermediary structural feature that receives the pressing portion, enabling the pressing force to be applied at a specific location to achieve secure coupling without excessive force or time
2Strength
If the adapter is made of metal, then the structural strength is improved, but scratches are left on the plate trial and plate implant
Solution Approach 1:
The adapter is constructed as a composite structure with a metal body portion providing structural strength and a plastic pressing portion that contacts the trials to prevent surface scratching while maintaining coupling effectiveness
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 system enables precise evaluation of implant mobility, facilitating the selection of a suitable implant size efficiently, thereby alleviating surgical burdens and improving patient recovery outcomes.
Implementation Method 1
the adapter includes an elastic member on one side thereof, opposite ends of which press the plate trial and the insert trial, respectively, to firmly couple the two trials
Data Source
AI summary
A knee trial which is coupled to identify the mobility of an implant before the implant is implanted by total knee arthroplasty, and more particularly, a detachable knee trial which includes a plate trial, an insert trial, and an adapter for easy attachment and detachment of the two trials, wherein the adapter includes an elastic member on one side thereof to firmly couple the two trials by pressing the plate trial and the insert trial with opposite ends of the elastic member and to alleviate the burdens of an operator and a patient by allowing the adapter to be attached and detached even only with a simple operation of pressing the adapter and compressing the elastic member by a hand and promptly and precisely performing an operation of selecting an implant of a suitable size while applying various trials in the total knee arthroplasty process and shortening surgery time, alleviating the burdens of a surgeon and a patient, and wherein one side of the adapter is formed of plastic, making it possible to couple the plate trial and the plate implant without leaving a flaw and the like in the plate trial and the plate implant.