Tibial Reamer Offset Guide for Knee Revision Surgery
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Solution Overview
Problem
In revision knee surgeries, existing orthopaedic joint replacement procedures face challenges in efficiently preparing the patient's tibia to receive new prosthetic components, particularly in accurately determining the offset orientation and reaming depth, which can affect the fit and stability of the prosthetic components.
Innovation Solution
The orthopaedic surgical instrument system includes a reamer with cutting flutes and a tibial base plate with offset guides, along with a method that involves using an attachment device and cutting block to prepare the tibia, allowing for precise resection and determination of the offset orientation, enabling accurate placement of the prosthetic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional orthopaedic joint replacement procedures are used, then the surgical process is simpler, but the accuracy in determining offset orientation and reaming depth is insufficient
Solution Approach 1:
The surgical instrument system is divided into multiple functional components including offset guides, reamers, attachment devices, and cutting blocks. Each component performs a specific function in the tibial preparation process, allowing for precise measurement and control of offset orientation and reaming depth while maintaining modular flexibility in the surgical procedure.
2Manufacturing precision
If precise resection and offset orientation determination are implemented, then the placement accuracy of prosthetic components is improved, but the surgical procedure becomes more time-consuming
Solution Approach 1:
The offset guides are pre-configured with specific offset orientations and are attached to the tibial base plate before the reaming process. This preliminary setup allows the surgeon to immediately determine the correct reaming depth and orientation without time-consuming calculations or adjustments during the surgical procedure, thereby maintaining high placement accuracy while reducing surgical time.
3Manufacturing precision
If multiple surgical instruments and attachment devices are used, then the preparation precision of tibia is improved, but the device complexity and ease of operation are reduced
Solution Approach 1:
The attachment device integrates multiple functions into a single unit: it secures the offset guides to the tibial base plate, provides reference markings for reaming depth, and guides the reamer positioning. This consolidation of functions into unified components reduces the number of separate instruments the surgeon must handle, thereby improving ease of operation while maintaining high preparation precision.
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 method or technique for using the surgical instruments to prepare the bones is also disclosed.