Orthopaedic Prosthesis Assembly Platform with Stabilizer Arm
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Solution Overview
Problem
Current orthopaedic surgical instruments lack an efficient method for aligning and securing prosthetic components during knee replacement surgeries, particularly in revision procedures, where precise alignment and secure fixation are crucial for optimal joint function and longevity.
Innovation Solution
The system employs a modular instrument setup with a mounting platform and stabilizer arm, utilizing prosthetic trial components and offset adaptors to align and secure prosthetic components, ensuring accurate positioning and secure attachment of tibial and femoral prostheses by replicating the orientation and position determined during the trial phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional surgical instruments are used for assembling orthopaedic prostheses, then the surgical procedure can be performed, but precise alignment and secure fixation of prosthetic components cannot be reliably achieved
Solution Approach 1:
The surgical instrument system is divided into separate functional modules: a mounting platform for positioning, a stabilizer arm for alignment, and a locking mechanism for fixation. This segmentation allows each component to be optimized for its specific function, improving overall precision and reliability of prosthesis assembly.
Solution Approach 2:
A trial prosthesis assembly serves as an intermediary tool during the surgical procedure. It is first positioned and aligned using the surgical instrument, then used as a guide to position the final permanent prosthesis. This intermediary approach ensures accurate alignment and secure fixation by replicating the trial configuration in the permanent implant.
2Adaptability or versatility
If prosthetic trial components are used to size and select components, then the appropriate prosthetic components can be identified, but the trial components cannot be directly used for final implantation
Solution Approach 1:
The trial prosthesis assembly is designed as a replicable configuration that can be positioned on the mounting platform. The trial assembly includes a trial component with a post that replicates the geometry and orientation of the final prosthesis. This copying allows the trial configuration to be accurately reproduced in the permanent implant, ensuring both selection flexibility and implantation readiness.
Solution Approach 2:
The trial prosthesis assembly is positioned and aligned on the mounting platform before final implantation. This preliminary positioning allows the surgeon to verify size, shape, and orientation of the prosthetic components, ensuring the correct components are selected and configured before the permanent implant is placed in the patient.
3Measurement precision
If the mounting platform is rotated to position axes in a vertical plane, then accurate alignment can be achieved, but the platform must be locked to prevent rotation
Solution Approach 1:
The locking mechanism is designed to automatically engage when the mounting platform is rotated to the correct orientation. The geometry of the platform and stabilizer arm interaction creates a self-locking effect, where proper positioning inherently secures the platform without requiring additional complex locking components.
Data Source
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AI summary
A method and instruments to assemble an orthopaedic prosthesis is disclosed. The system may also include prosthetic trial components (1000), which may be used to size and select the components of the orthopaedic prosthesis. The system may include components of the orthopaedic prosthesis such as, for example, a prosthetic femoral component (16), a prosthetic tibial component (1284), a prosthetic stem (940) component, and a prosthetic sleeve component (1286).