Knee Cone Augments for Cementless Revision Implant Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In revision knee surgeries, existing orthopaedic surgical instruments and methods struggle to effectively address bone loss and defects in the tibia and femur, particularly when using cone augments that are not directly locked to the revision knee prosthesis, leading to challenges in implantation and stability without bone cement.
Innovation Solution
The use of orthopaedic systems and methods involving tibial and femoral cone augments, which are implanted separately into the tibia and femur before securing the revision prosthesis, and surgical broaches guided by stem trial components to create precise broached cavities, allowing for stable implantation without reliance on bone cement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional revision knee surgery methods are used to address bone loss and defects, then the surgical procedure can be performed, but the process becomes complex and requires multiple instruments
Solution Approach 1:
The cone augment is designed as a universal component that can address multiple types of bone loss and defects in both tibia and femur through a single implant design. The conical geometry with standardized taper angles allows the same basic component type to be used across different anatomical locations and defect scenarios, reducing the need for multiple specialized instruments and procedures
2Adaptability or versatility
If modular cone augments with common taper angles are used, then flexible sizing and positioning is achieved, but the implantation process requires precise bone preparation
Solution Approach 1:
The system utilizes standardized taper angle parameters (e.g., 7 degrees) that serve as consistent geometric references during bone preparation. By establishing fixed angular parameters for the conical cavity preparation, the system enables flexible component sizing while maintaining precise implantation through repeatable geometric relationships between the prepared cavity and the cone augment
Data Source
AI summary
An orthopaedic joint replacement system is shown and described. The system includes a number of prosthetic components configured to be implanted into a patient's knee. The system also includes a number of surgical instruments configured for use in preparing the bones of the patient's knee to receive the implants. A number of methods for using the surgical instruments to prepare the bones is also disclosed.