Bone Cutting Guide with Adjustable Guidance Spheres
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Solution Overview
Problem
Current surgical methods for correcting bone deformities or repairing bone trauma lack a reliable guide for accurately cutting bones, often resulting in free-hand cuts that may not achieve the precise angles required, leading to potential inaccuracies and limited remedies for incorrect cuts.
Innovation Solution
A bone cutting guide comprising an outer shell with upper and lower components, guide spheres, and fasteners that secure guide surfaces to allow precise alignment and cutting at selected angles, utilizing pin and wire guidance holes to stabilize the device on the bone and enable precise cuts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If free hand cutting is used, then the surgical procedure can be performed without additional guidance devices, but the cutting precision and angle accuracy deteriorate
Solution Approach 1:
The patent introduces a cutting guide as an intermediary device between the surgeon and the bone. The guide includes a guide surface that contacts the bone and a guide line that provides visual guidance for the cut. This intermediary mechanism enables precise cutting angles without requiring the surgeon to directly control the cutting tool hand, thereby resolving the contradiction between device simplicity and cutting precision.
Solution Approach 2:
The patent replaces the purely mechanical free-hand cutting approach with a guided system that uses visual guidance lines and contact surfaces. Instead of relying on manual skill and anatomical knowledge alone, the system substitutes mechanical guidance structures (guide surface, guide line) that physically constrain and direct the cutting tool, achieving higher precision without complex automated control systems.
2Productivity
If free hand cutting is used, then the surgical workflow remains simple and rapid, but the reliability of cut accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-positioning the cutting guide on the bone before making the cut. The guide is placed and secured in advance, with the guide line already positioned to indicate the exact cutting path and angle. This preliminary setup ensures that when the cutting tool is applied, the desired accuracy is achieved without requiring complex real-time adjustments or multiple attempts, thereby maintaining surgical efficiency while improving reliability.
3Manufacturing precision
If parallel cuts are made to ensure accurate bone portion fitting, then the bone grafting precision is improved, but the difficulty of achieving exact parallelism without guidance deteriorates
Solution Approach 1:
The guide surface acts as an intermediary that physically contacts the bone and provides a stable reference plane. The guide line on this surface provides visual guidance that is easily followable during the cutting process. This intermediary system makes achieving parallel cuts intuitive and straightforward, as the surgeon simply follows the visual guide rather than attempting to mentally calculate and execute parallel lines, thereby improving both precision and ease of operation.
Data Source
AI summary
Provided is a Bone Cutting Guide (BCG) for facilitating the cutting of a patent's bones that may include an outer shell, comprising an upper shell; and a lower shell; a left guidance sphere, comprising a first plurality of pin guidance holes; and a first guide surface; a right guidance sphere, comprising a second plurality of pin guidance holes; and a second guide surface, wherein the left and right guidance spheres are positioned between the upper and lower shells; and a plurality of fasteners configured to hold the upper and lower shells together and, when tightened, secure the left guidance sphere and right guidance sphere into selected positions.