Robotic Bone Surface Preparation Using Interchangeable Planar and Rotary Tools
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Solution Overview
Problem
Current methods and tools used in robotic surgical systems for bone repair procedures fail to achieve precise bone surface preparation necessary for a press-fit implant, leading to inadequate fixation of both cemented and cementless implant components.
Innovation Solution
A method and system that utilize a robotic surgical device with interchangeable tools, such as a planar saw, rotary burr, and drill, guided by virtual boundaries to precisely modify bone surfaces, allowing for the creation of surfaces that match implant components without adhesives, enabling secure press-fit implantation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single tool is used for bone preparation, then the device complexity is reduced, but the manufacturing precision of bone surfaces is insufficient for press-fit implants
Solution Approach 1:
The robotic device is designed with a single multi-functional tool that can perform multiple bone preparation operations (cutting, grinding, shaping) by changing tool attachments or modes, rather than requiring separate specialized tools for each operation. This maintains device simplicity while achieving the precision needed for press-fit implants through controlled multi-stage preparation.
2Strength
If current bone preparation methods are used, then the ease of operation is maintained, but the fixation strength of implant components is insufficient
Solution Approach 1:
The system performs preliminary virtual planning and simulation of bone preparation before actual surgery. The robotic device executes pre-programmed preparation sequences that create optimally shaped bone surfaces in advance, ensuring strong implant fixation while reducing intraoperative complexity through automation.
3Reliability
If adhesive is used to secure implant, then the ease of operation is improved, but the reliability of implant fixation is reduced
Solution Approach 1:
The system extracts and eliminates the need for adhesive cement by creating bone surfaces that mechanically interlock with press-fit implants through precise robotic shaping. This removes the adhesive layer entirely, providing more reliable mechanical fixation without the complexity of cement application and the risks of adhesive failure.
Data Source
AI summary
A method for repairing a bone of a patient may include superimposing a first virtual boundary on a virtual bone and superimposing a second virtual boundary on the virtual bone. The method may further include robotically modifying the bone of the patient with a planar tool along a first working boundary to create a first surface. The first working boundary may correspond to the first virtual boundary. The method may further include robotically modifying the bone of the patient with a rotary tool along a second working boundary to create a second surface. The second working boundary may correspond to the second virtual boundary.