Bone Cutting Guide with Adjustable Arms and Gears
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bone cutting guides for surgical procedures, such as hip or knee arthroplasty, are bulky and complex, making it difficult to accurately perform multiple bone cuts in distinct planes with sufficient precision and quality.
Innovation Solution
A compact bone cutting guide system with two seats fastened to the bone head, featuring adjustable rotation axes and actuating gears, allowing for precise positioning and orientation of cutting tools like mills or oscillating saws, enabling cutting in various planes with a reduced bulk and simplified kinematics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional bone cutting guide is used to perform successive bone cuttings in distinct planes, then the cutting precision is maintained, but the device becomes bulky and complex
Solution Approach 1:
The cutting guide is divided into modular components: a base element fixed to the bone, adjustable arms that can be positioned independently, and a guide element that moves along the arms. This segmentation allows each component to perform its function with simpler geometry, reducing overall device complexity while maintaining cutting precision through the coordinated arrangement of these modular parts.
Solution Approach 2:
The device incorporates adjustable and movable elements rather than fixed rigid structures. The arms can be adjusted to different positions and angles, and the guide element can move along the arms to accommodate multiple cutting planes. This dynamic capability allows the same simplified structure to adapt to various cutting requirements without becoming bulky.
2Productivity
If multiple bone cuts are performed in distinct planes using conventional guides, then the surgical procedure is complete, but the device requires large space and has complex kinematics
Solution Approach 1:
The cutting guide is designed as a multi-functional device where the same base, arms, and guide element combination can perform multiple cutting operations in different planes. The guide element can be repositioned along the adjustable arms to accommodate various cutting angles and orientations, allowing one compact device to replace what would traditionally require multiple specialized guides, thereby reducing overall device volume while maintaining surgical efficiency.
3Volume of moving object
If a compact cutting guide is designed to reduce bulk, then the device volume is reduced, but the positioning accuracy and orientation precision may be compromised
Solution Approach 1:
The device incorporates adjustment mechanisms that allow the arms and guide element to be precisely positioned and locked before each cutting operation. These preliminary positioning actions ensure that even though the device is compact, the cutting guide can be accurately aligned with the desired cutting plane. The adjustment mechanisms include features like set screws and locking elements that maintain precise positioning throughout the surgical procedure.
Data Source
AI summary
A device for guiding a cutting tool capable of cutting bone portions at the level of the head of a bone includes a seat intended to be fastened at the level of said head defining a first rotation axis (Γ). The device includes means for adjusting the position of the first rotation axis with respect to said seat and an arm, with one end of said arm being pivotally assembled on said seat according to the first rotation axis. A guide intended to support the tool is pivotally assembled on the arm according to a second rotation axis (Δ).